MR tapcon 230 pro Operating Instructions Manual

Voltage Regulator
TAPCON® 230 pro

Operating Instructions

3550953/00 EN

© All rights reserved by Maschinenfabrik Reinhausen
Dissemination and reproduction of this document and use and disclosure of its content are strictly prohibited

unless expressly permitted.
Infringements will result in liability for compensation. All rights reserved in the event of the granting of patents,

utility models or designs.
The product may have been altered since this document was published.
We reserve the right to change the technical data, design and scope of supply.
Generally the information provided and agreements made when processing the individual quotations and orders

are binding.
The original operating instructions were written in German.

Table of contents

Table of contents

1 Introduction ......................................................................................................................... 8

1.1 Manufacturer ....................................................................................................................................... 8

1.2 Subject to change without notice......................................................................................................... 8

1.3 Completeness...................................................................................................................................... 8

1.4 Safekeeping......................................................................................................................................... 8

1.5 Notation conventions ........................................................................................................................... 8

1.5.1 Hazard communication system ............................................................................................................................. 9

1.5.2 Information system .............................................................................................................................................. 10

1.5.3 Instruction system ............................................................................................................................................... 10

1.5.4 Typographic conventions .................................................................................................................................... 11

2 Safety ................................................................................................................................. 12

2.1 General safety information ................................................................................................................ 12

2.2 Appropriate use ................................................................................................................................. 12

2.3 Inappropriate use............................................................................................................................... 12

2.4 Personnel qualification ...................................................................................................................... 13

2.5 Operator's duty of care ...................................................................................................................... 13

3 Product description .......................................................................................................... 14

3.1 Scope of delivery ............................................................................................................................... 14

3.2 Function description of the voltage regulation ................................................................................... 15

3.3 Performance features ........................................................................................................................ 16

3.4 Operating modes ............................................................................................................................... 17

3.5 Hardware ........................................................................................................................................... 19

3.5.1 Name plate .......................................................................................................................................................... 20

3.5.2 Operating controls ............................................................................................................................................... 20

3.5.3 Display elements ................................................................................................................................................. 22

3.5.4 Serial interface .................................................................................................................................................... 24

3.5.5 Modules............................................................................................................................................................... 24

4 Packaging, transport and storage................................................................................... 27

4.1 Packaging.......................................................................................................................................... 27

4.1.1 Purpose ............................................................................................................................................................... 27

4.1.2 Suitability, structure and production ................................................................................................................... 27

4.1.3 Markings.............................................................................................................................................................. 27

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4.2 Transportation, receipt and handling of shipments............................................................................ 27

4.3 Storage of shipments......................................................................................................................... 28

5 Mounting ............................................................................................................................ 30

5.1 Preparation ........................................................................................................................................ 30

5.2 Mounting device ................................................................................................................................ 30

5.2.1 Flush panel mounting .......................................................................................................................................... 32

5.2.2 Wall mounting with mounting brackets................................................................................................................ 33

5.2.3 Cap rail mounting ................................................................................................................................................ 34

5.2.4 Wall mounting...................................................................................................................................................... 35

5.2.5 Removing the door .............................................................................................................................................. 36

5.3 Connecting device ............................................................................................................................. 37

5.3.1 Cable recommendation ....................................................................................................................................... 38

5.3.2 Information about laying fiber-optic cable............................................................................................................ 38

5.3.3 Electromagnetic compatibility.............................................................................................................................. 39

5.3.4 Connecting cables to the system periphery ........................................................................................................ 44

5.3.5 Supplying the voltage regulator using auxiliary voltage ...................................................................................... 44

5.3.6 Wiring device....................................................................................................................................................... 45

5.3.7 Checking functional reliability .............................................................................................................................. 45

6 Commissioning ................................................................................................................. 47

6.1 Setting the display contrast ............................................................................................................... 47

6.2 Setting parameters ............................................................................................................................ 47

6.2.1 Setting the language ........................................................................................................................................... 48

6.2.2 Setting further parameters................................................................................................................................... 48

6.3 Function tests .................................................................................................................................... 49

6.3.1 Checking control functions .................................................................................................................................. 50

6.3.2 Checking additional functions.............................................................................................................................. 51

6.3.3 Checking parallel operation................................................................................................................................. 54

7 Functions and settings..................................................................................................... 59

7.1 Key lock ............................................................................................................................................. 59

7.2 General.............................................................................................................................................. 59

7.2.1 Setting device ID ................................................................................................................................................. 59

7.2.2 Setting the baud rate ........................................................................................................................................... 60

7.2.3 Setting the switching pulse time .......................................................................................................................... 60

7.2.4 Setting operations counter .................................................................................................................................. 62

7.2.5 Dimming display .................................................................................................................................................. 63

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7.2.6 Activating/deactivating the automatic key lock .................................................................................................... 63

7.2.7 "Function monitoring" message for monitoring messages <30 V........................................................................ 64

7.2.8 Setting motor runtime monitoring ........................................................................................................................ 65

7.2.9 Activate manual mode/auto mode....................................................................................................................... 67

7.2.10 Activating Local/Remote...................................................................................................................................... 67

7.3 NORMset........................................................................................................................................... 68

7.4 Control parameters............................................................................................................................ 70

7.4.1 Setting desired value 1...3................................................................................................................................... 72

7.4.2 Selecting a desired value .................................................................................................................................... 73

7.4.3 Bandwidth............................................................................................................................................................ 73

7.4.4 Setting delay time T1........................................................................................................................................... 75

7.4.5 Setting control response T1 ................................................................................................................................ 76

7.4.6 Setting delay time T2........................................................................................................................................... 76

7.5 Limit values........................................................................................................................................ 77

7.5.1 Setting undervoltage monitoring U<.................................................................................................................... 78

7.5.2 Setting overvoltage monitoring U> ...................................................................................................................... 80

7.5.3 Setting overcurrent monitoring I> ........................................................................................................................ 82

7.5.4 Set undercurrent monitoring I<............................................................................................................................ 83

7.5.5 Activate/deactivate active power monitoring ....................................................................................................... 84

7.5.6 Permitted tap positions........................................................................................................................................ 84

7.6 Compensation ................................................................................................................................... 86

7.6.1 Line drop compensation ...................................................................................................................................... 86

7.6.2 Z compensation................................................................................................................................................... 89

7.7 Transformer data ............................................................................................................................... 91

7.7.1 Setting the primary transformer voltage .............................................................................................................. 92

7.7.2 Setting the secondary transformer voltage.......................................................................................................... 93

7.7.3 Setting primary transformer current..................................................................................................................... 93

7.7.4 Setting the current transformer connection ......................................................................................................... 94

7.7.5 Setting the phase difference for the current transformer/voltage transformer..................................................... 94

7.8 Parallel operation............................................................................................................................... 98

7.8.1 Assigning CAN bus address................................................................................................................................ 98

7.8.2 Selecting parallel operation method .................................................................................................................... 99

7.8.3 Assigning a parallel operation group ................................................................................................................. 103

7.8.4 Activating/deactivating blocking in simplex mode ............................................................................................. 104

7.8.5 Setting delay time for parallel operation error messages .................................................................................. 104

7.8.6 Configuring the maximum permitted tap difference........................................................................................... 104

7.8.7 Activating/deactivating follower tapping without measured voltage .................................................................. 105

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7.8.8 Activating/deactivating parallel operation .......................................................................................................... 105

7.9 Tap position capture ........................................................................................................................ 106

7.9.1 Digital tap position capture ................................................................................................................................ 106

7.9.2 Analog tap position capture............................................................................................................................... 107

7.10 Setting the desired voltage level remotely ....................................................................................... 109

7.10.1 Activate/deactivate setting the desired voltage level remotely. ......................................................................... 110

7.10.2 Setting lower limit value for the desired value ................................................................................................... 110

7.10.3 Setting upper limit value for the desired value .................................................................................................. 111

7.11 Configurable inputs and outputs ...................................................................................................... 112

7.11.1 Linking inputs with functions.............................................................................................................................. 112

7.11.2 Linking outputs with functions ........................................................................................................................... 114

7.12 LED selection .................................................................................................................................. 116

7.13 Information about device ................................................................................................................. 118

7.13.1 Displaying info screen ....................................................................................................................................... 118

7.13.2 Displaying measured values ............................................................................................................................. 119

7.13.3 Display calculated values .................................................................................................................................. 120

7.13.4 Carrying out LED test ........................................................................................................................................ 120

7.13.5 Displaying status of the MIO card ..................................................................................................................... 121

7.13.6 Displaying status of the PIO card ...................................................................................................................... 122

7.13.7 Displaying parallel operation ............................................................................................................................. 122

7.13.8 Displaying data on CAN bus ............................................................................................................................. 123

7.13.9 Peak memory .................................................................................................................................................... 123

7.13.10 Resetting parameters ........................................................................................................................................ 124

7.13.11 Displaying memory overview............................................................................................................................. 125

7.13.12 Displaying event overview................................................................................................................................. 125

8 Fault elimination.............................................................................................................. 126

8.1 No regulation in AUTO mode .......................................................................................................... 126

8.2 Unexplained tap change.................................................................................................................. 126

8.3 Man-machine interface .................................................................................................................... 127

8.4 Incorrect measured values .............................................................................................................. 127

8.5 Parallel operation faults ................................................................................................................... 128

8.6 Tap position capture incorrect ......................................................................................................... 128

8.7 Customized GPIs/GPOs.................................................................................................................. 129

8.8 General faults .................................................................................................................................. 129

8.9 Other faults ...................................................................................................................................... 130

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9 Messages......................................................................................................................... 131

10 Disposal ........................................................................................................................... 134

11 Overview of parameters ................................................................................................. 135

12 Technical data ................................................................................................................. 139

12.1 Display elements ............................................................................................................................. 139

12.2 Electrical data .................................................................................................................................. 139

12.3 Dimensions and weight ................................................................................................................... 139

12.4 Ambient conditions .......................................................................................................................... 141

12.5 Electrical safety ............................................................................................................................... 141

12.6 Electromagnetic compatibility .......................................................................................................... 141

12.7 Environmental durability tests.......................................................................................................... 142

12.8 Mechanical stability ......................................................................................................................... 142

Glossary........................................................................................................................... 143

List of key words............................................................................................................. 144

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1 Introduction

Introduction

1

This technical file contains detailed descriptions on the safe and proper in­stallation, connection, commissioning and monitoring of the product.

It also includes safety instructions and general information about the prod­uct.

This technical file is intended solely for specially trained and authorized per­sonnel.

Manufacturer

1.1

The product is manufactured by:

Maschinenfabrik Reinhausen GmbH

Falkensteinstraße 8
93059 Regensburg, Germany
Tel.: [phone]
Fax: [phone]
E-mail: [e-mail]

Further information on the product and copies of this technical file are avail­able from this address if required.

Subject to change without notice

1.2

The information contained in this technical file comprises the technical speci­fications approved at the time of printing. Significant modifications will be in­cluded in a new edition of the technical file.

The document number and version number of this technical file are shown in
the footer.

Completeness

1.3

This technical file is incomplete without the supporting documentation.

Safekeeping

1.4

This technical file and all supporting documents must be kept ready at hand
and accessible for future use at all times.

Notation conventions

1.5

This section contains an overview of the symbols and textual emphasis
used.

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1 Introduction

WARNING

1.5.1

1.5.1.1

1.5.1.2

Hazard communication system

Warnings in this technical file are displayed as follows.

Warning relating to section

Warnings relating to sections refer to entire chapters or sections, sub-sec­tions or several paragraphs within this technical file. Warnings relating to
sections use the following format:

Type and source of danger

Consequences
► Action
► Action

Embedded warning

Embedded warnings refer to a particular part within a section. These warn­ings apply to smaller units of information than the warnings relating to sec­tions. Embedded warnings use the following format:

DANGER! Instruction for avoiding a dangerous situation.

1.5.1.3

Signal words and pictograms

The following signal words are used:

Signal
word

DANGER Indicates a hazardous situation which, if not avoided, will

WARNING Indicates a hazardous situation which, if not avoided, could

CAUTION Indicates a hazardous situation which, if not avoided, could

NOTICE Indicates measures to be taken to prevent damage to

Table 1: Signal words in warning notices

Pictograms warn of dangers:

Pictogram Meaning

Meaning

result in death or serious injury.

result in death or serious injury.

result in injury.

property.

Warning of a danger point

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Pictogram Meaning

Warning of dangerous electrical voltage

Warning of combustible substances

Warning of danger of tipping

Table 2: Pictograms used in warning notices

1 Introduction

1.5.2

1.5.3

Information system

Information is designed to simplify and improve understanding of particular
procedures. In this technical file it is laid out as follows:

Important information.

Instruction system

This technical file contains single-step and multi-step instructions.

Single-step instructions

Instructions which consist of only a single process step are structured as fol­lows:

Aim of action
ü Requirements (optional).
► Step 1 of 1.

ð Result of step (optional).

ð Result of action (optional).

Multi-step instructions

Instructions which consist of several process steps are structured as follows:

Aim of action
ü Requirements (optional).

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1 Introduction

1. Step 1.
ð Result of step (optional).

2. Step 2.

ð Result of step (optional).

ð Result of action (optional).

1.5.4

Typographic conventions

The following typographic conventions are used in this technical file:

Typographic
convention

UPPERCASE Operating controls,

[Brackets] PC keyboard [Ctrl] + [Alt]
Bold Software operating con-

…>…>… Menu paths Parameter > Control pa-

Italics System messages, error

[► Number of
pages].

Table 3: Typographic conventions

Purpose Example

ON/OFF

switches

Press Continue button

trols

rameter
Function monitoring alarm

messages, signals

triggered

Cross reference [► 41].

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Safety

2

General safety information

2.1

The technical file contains detailed descriptions on the safe and proper in­stallation, connection, commissioning and monitoring of the product.

▪ Read this technical file through carefully to familiarize yourself with the

product.

▪ Particular attention should be paid to the information given in this chap-

ter.

Appropriate use

2.2

The product and associated equipment and special tools supplied with it
comply with the relevant legislation, regulations and standards, particularly
health and safety requirements, applicable at the time of delivery.

If used as intended and in compliance with the specified requirements and
conditions in this technical file as well as the warning notices in this technical
file and attached to the product, then the product does not present any haz­ards to people, property or the environment. This applies throughout the
product's entire life, from delivery through installation and operation to disas­sembly and disposal.

2 Safety

The operational quality assurance system ensures a consistently high quality
standard, particularly in regard to the observance of health and safety re­quirements.

The following is considered appropriate use
▪ The product must be operated in accordance with this technical file and

the agreed delivery conditions and technical data

▪ The equipment and special tools supplied must be used solely for the in-

tended purpose and in accordance with the specifications of this techni­cal file

Inappropriate use

2.3

Use is considered to be inappropriate if the product is used other than as de­scribed in the Appropriate use section.

Maschinenfabrik Reinhausen GmbH does not accept liability for damage re­sulting from unauthorized or inappropriate changes to the product. Inappro­priate changes to the product without consultation with Maschinenfabrik
Reinhausen GmbH can lead to personal injury, damage to property and op­erational disruption.

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2 Safety

Personnel qualification

2.4

The product is designed solely for use in electrical energy systems and facili­ties operated by appropriately trained staff. This staff comprises people who
are familiar with the installation, assembly, commissioning and operation of
such products.

Operator's duty of care

2.5

To prevent accidents, disruptions and damage as well as unacceptable ad­verse effects on the environment, those responsible for transport, installa­tion, operation, maintenance and disposal of the product or parts of the prod­uct must ensure the following:

▪ All warning and hazard notices are complied with.
▪ Personnel are instructed regularly in all relevant aspects of operational

safety, the operating instructions and particularly the safety instructions
contained therein.

▪ Regulations and operating instructions for safe working as well as the

relevant instructions for staff procedures in the case of accidents and
fires are kept on hand at all times and are displayed in the workplace
where applicable.

▪ The product is only used when in a sound operational condition and

safety equipment in particular is checked regularly for operational relia­bility.

▪ Only replacement parts, lubricants and auxiliary materials which are au-

thorized by the manufacturer are used.

▪ The specified operating conditions and requirements of the installation

location are complied with.

▪ All necessary devices and personal protective equipment for the specific

activity are made available.

▪ The prescribed maintenance intervals and the relevant regulations are

complied with.

▪ Installation, electrical connection and commissioning of the product may

only be carried out by qualified and trained personnel in accordance
with this technical file.

▪ The operator must ensure appropriate use of the product.

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3 Product description

Product description

3

This chapter contains an overview of the design and function of the product.

Scope of delivery

3.1

The following items are included in the delivery:
▪ Voltage regulator TAPCON® 230
▪ Folder with all device documentation
▪ Quick reference guide (in the inside door of the device)
▪ MR-Suite CD (contains the TAPCON®-trol program)
▪ Door key
▪ 3mm Allen key
▪ 2 countersunk head screws
▪ Control panel bracket pre-mounted on device's housing

Figure 1: Control panel bracket

▪ Mounting bracket for wall mounting

Figure 2: Mounting bracket

▪ Covering strip for door

Figure 3: Covering strip

Optional:

▪ Cap rail clip

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3 Product description

Figure 4: Cap rail clip

Please note the following:
▪ Check the shipment for completeness on the basis of the shipping docu-

ments.

▪ Store the parts in a dry place until installation.

Function description of the voltage regulation

3.2

The TAPCON® serves to keep constant the output voltage of a transformer
with an on-load tap-changer.

The TAPCON® compares the transformer's measured voltage (V
defined reference voltage (V

). The difference between V

desired

actual

) with a

actual

and V

desired

is the control deviation (dV).

The TAPCON® parameters can be optimally adjusted to the line voltage re­sponse to achieve a balanced control response with a small number of tap­change operations.

The following diagram shows an overview of voltage regulation.

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3 Product description

TAPCON® 230

Automatic voltage regulator

Regulation section

Regulating transformer

Summer Winter

Load profile of grid

Control variable for
line voltage

Measurement
transformer

Inputs
digital and analog

Automatic voltage regulator

TAPCON® 230

for example for parallel operation of up to 16 transformers

Station control system

Remote communication and control room

Figure 5: Overview of voltage regulation

Performance features

3.3

The TAPCON® is responsible for controlling tapped transformers.

Apart from control tasks, the TAPCON® provides additional functions such
as:

▪ Integrated protective functions:

▪ Compensation for voltage drops on the line (line drop compensation)
▪ Compensation for voltage fluctuations in the meshed grid (Z compensa-

– Undervoltage blocking and overvoltage blocking
– Overvoltage detection with high-speed return

tion)

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▪ Digital inputs and outputs can be individually programmed on-site by the

user

▪ Additional indicators using LEDs outside the display for freely selectable

functions

▪ Display of all measured values such as voltage, current, active power,

apparent power or reactive power, power factor (cos φ)

▪ Selection of 3 different desired values
▪ When ordering you can choose between tap position capture:

– using analog signal 4…20 mA
– using analog signal via resistor contact series
– using digital signal via BCD code

▪ Additional digital inputs and outputs which can be freely parameterized

by the customer

▪ Parallel operation of up to 16 transformers in 2 groups using the follow-

ing methods:
– Master/Follower
– Circulating reactive current minimization

Operating modes

3.4

The device can be operated in the following operating modes:

Auto mode (AUTO)

In auto mode, the voltage is automatically controlled in accordance with the
set parameters. You cannot change further device settings in auto mode.
There is no active management by a higher level control system in this oper­ating mode.

Manual mode (MANUAL)

In manual mode, there is no automatic control. The motor-drive unit can be
controlled via the device's operating panel. You can change the device set­tings.

Local mode (LOCAL)

There is no active management by a superordinate control system in this op­erating mode.

Remote mode (REMOTE)

In remote mode, you can perform commands using an external control level.
In this case, manual operation of the , , and keys is disa-

bled.

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3 Product description

+ LOCAL + RE-

MOTE

+ LOCAL + RE-

MOTE

Automatic regulation Yes Yes No No
Tap-change operation using oper-

No No Yes No

ating controls
Tap-change operation using in-

No No No Yes

puts

Table 4: Overview of operating modes

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3 Product description

3.5

Hardware

Figure 6: Hardware

1 Operating panel with display

and LEDs

2 Door lock 4 Metric cable glands

3 Door

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3 Product description

3.5.1

3.5.2

Name plate

The name plate is on the outside of the device:

Figure 7: Name plate

Operating controls

The device has 15 pushbuttons. The illustration below is an overview of all
the device's operating controls .

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3 Product description

Figure 8: Operating controls

RAISE key: Sends control command for raise tap-change to the
motor-drive unit in manual mode.

LOWER key: Sends control command for lower tap-change to the
motor-drive unit in manual mode.

REMOTE key: Activate/deactivate "Remote" operating mode.
When you deactivate this operating mode, the "Local" operating
mode is automatically activated.

MANUAL key: Activate "Manual mode" operating mode.

AUTO key: Activate "Auto mode" operating mode.

PREV key: Change measured value display and switch to previ­ous parameters.

NEXT key: Change measured value display and switch to next
parameters.

ENTER key: Confirm selection and save modified parameters.

ESC key: Escape current menu and select previous menu levels.

MENU key: Select main menu.

F1 to F5 function keys: Select functions displayed on the screen.

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3 Product description

3.5.3

Display elements

The device has a graphics display and 15 LEDs , which indicate the various
operating statuses or events.

Figure 9: Indicator elements

1 Operating status LED, green 9 LED 3, function can be freely

assigned, yellow/green

2 Overcurrent blocking LED, red 10 LED 4, function can be freely

assigned, yellow/red

3 Undervoltage blocking LED,

11 Graphics display

red

4 Overvoltage blocking LED,

red

5 Parallel operation active LED,

green

12 Auto operating mode active

LED

13 Manual operating mode active

LED

6 NORMset active LED , green 14 Remote operating mode ac-

tive LED

7 LED 1, function can be freely

15 Lower tap-change active LED

assigned, yellow

8 LED 2, function can be freely

16 Raise tap-change active LED

assigned, yellow

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3 Product description

Display

Other measured values

Figure 10: Display

1 Status line 6 Bandwidth (upper and lower

limit)
2 Measured voltage U
3 Reference voltage U

Act

Ref

4 Other measured values (use

or to switch between

7 Time bar for delay time T1
8 Highlighting for measured

voltage U

Act

9 Highlighting for reference volt-

age U

Ref

them)

5 Tap position n-1; n; n+1 10 Remaining delay time T1

In auto mode and manual mode the measured value display can be set
using the or keys. The following measured values can be dis-

played:

Unit Measured value

dU Control deviation
I Current
S Apparent power
P Active power
Q Reactive power
Phase Phase angle

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3 Product description

Unit Measured value

Cos Active factor: Cosine φ [phi] (output factor)

Table 5: Measured value display

Status line

3.5.4

Current messages and events are displayed in the status line . You can
find more information about messages and events in the Messages chapter.

Serial interface

The parameters for the device can be set using a PC. The COM 1 (RS232)
serial interface on the front panel is provided for this purpose. You can use
the connection cable supplied to establish a connection to your PC via the
RS232 or USB port (using the optional USB adapter).

TAPCON®-trol software is needed for parameterization via the serial inter­face. The software and the related operating instructions are contained on
the CD provided.

3.5.5

Figure 11: Device connection to a PC

Modules

The device has integrated modules:
▪ MIO card
▪ PIO card

Carry out wiring in accordance with the supplied connection diagram. The
relevant cards are described in the following sections.

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3 Product description

3.5.5.1

MIO card

Figure 12: MIO card

1 Relay outputs (terminal X4) 4 Current transformer connec-

tion (terminal X1)
2 Signal inputs (terminal X4) 5 Voltage transformer connec-

tion and network connection

(terminal X2)
3 Relay outputs (terminal X3) 6 CAN bus connection

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3 Product description

3.5.5.2

PIO card

Figure 13: PIO card

1 Signal inputs and auxiliary

4 Relay outputs (terminal X5)
voltage generation (terminal
X6)

2 Analog input (terminal X7) 5 Relay outputs (terminal X5)
3 Digital tap position inputs (ter-

minal X6)

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4 Packaging, transport and storage

Packaging, transport and storage

4

Packaging

4.1

4.1.1

4.1.2

4.1.3

Purpose

The packaging is designed to protect the packaged goods during transport,
loading and unloading as well as periods of storage in such a way that no
(detrimental) changes occur. The packaging must protect the goods against
permitted transport stresses such as vibration, knocks and moisture (rain,
snow, condensation).

The packaging also prevents the packaged goods from moving impermissi­bly within the packaging. The packaged goods must be prepared for ship­ment before actually being packed so that the goods can be transported
safely, economically and in accordance with regulations.

Suitability, structure and production

The goods are packaged in a sturdy cardboard box. This ensures that the
shipment is secure when in the intended transportation position and that
none of its parts touch the loading surface of the means of transport or touch
the ground after unloading.

The box is designed for a maximum load of 10 kg.

Inlays inside the box stabilize the goods, preventing impermissible changes
of position, and protect them from vibration.

Markings

The packaging bears a signature with instructions for safe transport and cor­rect storage. The following symbols apply to the shipment of non-hazardous
goods. Adherence to these symbols is mandatory.

Protect
against

moisture

Table 6: Shipping pictograms

Transportation, receipt and handling of shipments

4.2

In addition to oscillation stress and shock stress, jolts must also be expected
during transportation. In order to prevent possible damage, avoid dropping,
tipping, knocking over and colliding with the product.

Top Fragile Attach lifting

gear here

Center of

mass

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4 Packaging, transport and storage

If a crate tips over, falls from a certain height (e.g. when slings tear) or expe­riences an unbroken fall, damage must be expected regardless of the
weight.

Every delivered shipment must be checked for the following by the recipient
before acceptance (acknowledgment of receipt):

▪ Completeness based on the delivery slip
▪ External damage of any type.

The checks must take place after unloading when the crate or transport con­tainer can be accessed from all sides.

Visible damage

Hidden damage

If external transport damage is detected on receipt of the shipment, proceed
as follows:

▪ Immediately record the transport damage found in the shipping docu-

ments and have this countersigned by the carrier.

▪ In the event of severe damage, total loss or high damage costs, immedi-

ately notify the sales department at Maschinenfabrik Reinhausen and
the relevant insurance company.

▪ After identifying damage, do not modify the condition of the shipment

further and retain the packaging material until an inspection decision
has been made by the transport company or the insurance company.

▪ Record the details of the damage immediately onsite together with the

carrier involved. This is essential for any claim for damages!

▪ If possible, photograph damage to packaging and packaged goods. This

also applies to signs of corrosion on the packaged goods due to mois­ture inside the packaging (rain, snow, condensation).

▪ Be absolutely sure to also check the sealed packaging.

When damages are not determined until unpacking after receipt of the ship­ment (hidden damage), proceed as follows:

▪ Make the party responsible for the damage liable as soon as possible by

telephone and in writing, and prepare a damage report.

▪ Observe the time periods applicable to such actions in the respective

country. Inquire about these in good time.

With hidden damage, it is very hard to make the transportation company (or
other responsible party) liable. Any insurance claims for such damages can
only be successful if relevant provisions are expressly included in the insur­ance terms and conditions.

Storage of shipments

4.3

When selecting and setting up the storage location, ensure the following:
▪ Protect stored goods against moisture (flooding, water from melting

snow and ice), dirt, pests such as rats, mice, termites and so on, and
against unauthorized access.

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4 Packaging, transport and storage

▪ Store the crates on timber beams and planks as a protection against ris-

▪ Ensure sufficient carrying capacity of the ground.
▪ Keep entrance paths free.
▪ Check stored goods at regular intervals. Also take appropriate action af-

ing damp and for better ventilation.

ter storms, heavy rain or snow and so on.

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Mounting

5

This chapter describes how to correctly mount and connect the device. Note
the connection diagrams provided.

WARNING

NOTICE

Electric shock

Risk of fatal injury due to electrical voltage.
► De-energize the device and system peripherals and lock them to pre-

vent them from being switched back on.

► Do so by short-circuiting the current transformer; do not idle the current

transformer.

Electrostatic discharge

Damage to the device due to electrostatic discharge.
► Take precautionary measures to prevent the build-up of electrostatic

charges on work surfaces and personnel.

Preparation

5.1

The following tools are needed for mounting:
▪ Provided 3mm Allen key (included in delivery)
▪ Small screwdriver for connecting the signal lines and supply lines

Other tools may be needed depending on installation location.

Mounting device

5.2

You can mount the device in the following installation versions:
▪ Flush panel mounting
▪ Wall mounting
▪ Wall mounting with mounting brackets
▪ Rail mounting (optional)

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Preparing for mounting

Before commencing mounting, the two mounting brackets back on the rear
of the device must be removed and the cable gland plate taken off. To do so,
proceed as follows:

1. Loosen the 4 Allen screws with attached Allen key to remove the mount­ing brackets.

Figure 14: Loosen mounting bracket

2. Loosen the 4 Allen screws with attached Allen key to remove the cable
gland plate.

Figure 15: Loosen cable gland plate

ð The mounting brackets and the cable gland plate are removed.

The relevant installation versions are described in the following sections.

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5 Mounting

5.2.1

Flush panel mounting

For flush panel mounting , the device is inserted through a cutout in the con­trol panel and fixed to the control panel or control cabinet from behind using
the mounting brackets. The diagram below shows the dimensions required
for the control panel cutout.

Figure 16: Dimensions for the cutout

A wall thickness of 2...5 mm (0.08...0.2 in) is needed for secure device fix­ing.

To mount the device in the control panel or control cabinet, proceed as fol­lows:

1. Close the device's door.

2. Insert the device through the cutout in the control panel or control cabi­net .

3. Screw both fixing brackets to the rear of the device with 2 hexagon
socket screws each .

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Figure 17: Flush panel mounting

ð The device is mounted and can be wired up .

Proceed with wiring as shown in the connection diagram and as described in
the Connecting device [► 37] section.

5.2.2

Wall mounting with mounting brackets

As an alternative to mounting the device directly on the wall, it can be fixed
to the wall using the mounting brackets supplied.

Drill 4 holes, each 5.5 mm (0.22 in) in diameter, in the wall as shown in the
drilling template below.

Figure 18: Bores for wall mounting with mounting brackets

To mount the device using the mounting brackets, proceed as follows:

1. Lay the device carefully on the door.

2. Screw the mounting brackets supplied to the back of the device using
the hexagon socket screws .

3. Fix the device on the wall using 4 screws (maximum diameter of 5 mm/

0.22 in) .

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5 Mounting

The screws for fixing to the wall are not included in the scope of supply. The
screw length required depends on the wall thickness.

Figure 19: Wall mounting with mounting brackets

ð The device is mounted and can be wired up .

Proceed with wiring as shown in the connection diagram and as described in
the Connecting device [► 37] section.

5.2.3

Cap rail mounting

Alternatively, the device can be fitted with a cap rail clip (aluminum extrusion
with central integrated wire spring). This enables you to mount the device on
a cap rail (in accordance with EN 50022).

When attaching the cap rail, sufficient space for the device must be planned
for. At least 5 cm (1.97 in) of space must be provided above and at least
35 cm (13.78 in) below the fixing bolts of the cap rail for the device housing.

To mount the device using the cap rail, proceed as follows:

1. Lay the device carefully on the door.

2. Screw the cap rail clip into the two top holes on the rear with the M5
hexagon socket countersunk head screws provided .

3. Suspend the cap rail clip in the cap rail and push the underside carefully
towards the wall until the clip can be heard to click into place .

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Figure 20: Cap rail mounting

ð The device is mounted and can be wired up .

Proceed with wiring as shown in the connection diagram and as described in
the Connecting device [► 37] section.

5.2.4

Wall mounting

For wall mounting, , the device is fixed directly to the wall. Drill 4 holes, each

5.5 mm in diameter, in the wall as shown in the drilling template below.

Figure 21: Drilling template for wall mounting

To mount the device directly on the wall, proceed as follows:
ü Close the device's door.

► Fix the device on the wall from behind using 4 screws (M5) .

The screws for wall mounting are not included in the scope of supply. The
screw length required depends on the wall thickness.

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Figure 22: Wall mounting

ð The device is mounted and can be wired up .

Proceed with wiring as shown in the connection diagram and as described in
the Connecting device section.

5.2.5

Removing the door

When the door is fitted, the device satisfies protection category IP54. The
door may be removed if the device is used solely in a dry atmosphere pro­tected from environmental influences. The device then satisfies protection
category IP21.

Proceed as follows to remove the door:

1. Loosen the grounding strap on the door using an open-end wrench.

Figure 23: Remove door

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2. Unscrew the fixing bolt using a slotted screwdriver and lift the door
out of the upper mounting .

Figure 24: Lift door from the suspension mount

3. Hook the cover strip in the upper and lower suspension mount
and fasten it with the provided raised countersunk head screws.

Figure 25: Fasten covering strip

ð The door is removed and the exposed attachment points for the door

are covered.

Connecting device

5.3

The following section describes how to make the electrical connection to the
device.

WARNING

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Electric shock

Danger of death due to connection mistakes
► Ground device using the grounding screw on the housing.
► Pay attention to the phase difference of the secondary terminals for the

current transformer and voltage transformer.

► Connect the output relays correctly to the motor-drive unit.

5 Mounting

5.3.1

Cable Terminal Cable type Wire cross-

Analog input X7 shielded

Signal inputs X4 Shielded 1.5 mm² - 0.6 Nm
RS232 SUB-D - Shielded 0.25 mm² 25 m ­RS485 - shielded

Ethernet RJ45 - min. CAT5 - - ­Relay outputs* X3 Unshielded 1.5 mm² - 0.6 Nm
Relay outputs*

optional
Current measure-

ment
Relay outputs X5 Unshielded 1.5 mm² - 0.6 Nm
Signal inputs X6 Unshielded 1.5 mm² - 0.6 Nm
Digital tap posi-

tion inputs
Auxiliary voltage X6 Unshielded 1.5 mm² - 0.6 Nm
Power supply X2:3/4 Unshielded 1.5 mm² - 0.6 Nm
CAN bus - Shielded 1.0 mm² 2000 m -

Table 7: Cable recommendation for connection cable

X4 Unshielded 1.5 mm² - 0.6 Nm

X1:5/6/9 Unshielded 4 mm² - 1.5 Nm

X6 Shielded 1.5 mm² - 0.6 Nm

Cable recommendation

Please note the following recommendation from Maschinenfabrik Reinhau­sen when wiring the device.

Excessive electrical power can prevent the relay contacts from breaking the
contact current. In control circuits operated with alternating current, take into
account the effect of the line capacitance of long control lines on the func­tion of the relay contacts.

Max. length Max. permissi-

section

1.5 mm² 400 m -

(< 25 Ω/km)

0.75 mm² 1000 m -

(< 50 Ω/km)

ble torque

5.3.2

*) Note the line capacitance, see note above.

Cable clips X1 to X4 are on the MIO card of the device. Cable clips X5 to X7
are on the PIO card of the device.

Information about laying fiber-optic cable

To ensure the smooth transfer of data via the fiber-optic cable, you must en­sure that mechanical loads are avoided when laying the fiber-optic cable and
later on during operation.

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5 Mounting

Please note the following:
▪ Radii must not fall below the minimum permissible bend radii (do not

bend fiber-optic cable).

▪ The fiber-optic cables must not be over-stretched or crushed. Observe

the permissible load values.

▪ The fiber-optic cables must not be twisted.
▪ Be aware of sharp edges which could damage the fiber-optic cable's

coating when laying or could place mechanical loading on the coating
later on.

▪ Provide a sufficient cable reserve near distributor cabinets for example.

Lay the reserve such that the fiber-optic cable is neither bent nor twisted
when tightened.

5.3.3

5.3.3.1

5.3.3.2

Electromagnetic compatibility

The device has been developed in accordance with applicable EMC stan­dards. The following points must be noted in order to maintain the EMC
standards.

Wiring requirement of installation site

Note the following when selecting the installation site:
▪ The system's overvoltage protection must be effective.
▪ The system's ground connection must comply with all technical regula-

tions.

▪ Separate system parts must be joined by a potential equalization.
▪ The device and its wiring must be at least 10 m away from circuit-break-

ers, load disconnectors and busbars.

Wiring requirement of operating site

Note the following when wiring the operating site:
▪ The connection cables must be laid in metallic cable ducts with a ground

connection.

▪ Do not route lines which cause interference (for example power lines)

and lines susceptible to interference (for example signal lines) in the
same cable duct.

▪ Maintain a gap of at least 100 mm between lines causing interference

and those susceptible to interference.

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Figure 26: Recommended wiring

5 Mounting

1 Cable duct for lines causing

interference

2 Interference-causing line (e.g.

power line)

3 Cable duct for lines suscepti-

ble to interference

4 Line susceptible to interfer-

ence (e.g. signal line)

▪ Short-circuit and ground reserve lines.
▪ The device must never be connected using multi-pin collective cables.
▪ Signal lines must be routed in a shielded cable.
▪ The individual conductors (outgoing conductors/return conductors) in

the cable core must be twisted in pairs.

▪ The shield must be fully (360º) connected to the device or a nearby

ground rail.

Using "pigtails" may limit the effectiveness of the shielding. Connect close­fitting shield to cover all areas.

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5 Mounting

Figure 27: Recommended connection of the shielding

5.3.3.3

1 Connection of the shielding

using a "pigtail"

2 Shielding connection covering

all areas

Wiring requirement in control cabinet

Note the following when wiring the control cabinet:
▪ The control cabinet for fitting the device must be prepared in accord-

ance with EMC requirements:
– Functional division of control cabinet (physical separation)
– Constant potential equalization (all metal parts are joined)
– Line routing in accordance with EMC requirements (separation of

lines which cause interference and those susceptible to interfer-

ence)
– Optimum shielding (metal housing)
– Overvoltage protection (lightning protection)
– Collective grounding (main grounding rail)
– Cable bushings in accordance with EMC requirements
– Any contactor coils present must be interconnected

▪ The device's connection cables must be laid in close contact with the

grounded metal housing or in metallic cable ducts with a ground con­nection.

▪ Signal lines and power lines/switching lines must be laid in separate ca-

ble ducts.

▪ The device must be grounded at the screw provided using a ground

strap (cross-section min. 8 mm²).

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Figure 28: Ground strap connection

Ground connection for wiring inside the device

The diagram below shows the ground connection for wiring inside the de­vice.

5.3.3.4

Figure 29: Grounding inside the device

Information about shielding the CAN bus

In order for the CAN bus to operate faultlessly, you have to connect the
shielding using one of the following variants. If neither connection variant is
possible, we would recommend using fiber optic cables. Fiber optic cables
decouple the voltage regulators and are not sensitive to electromagnetic in­terferences (surge and burst).

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5 Mounting

NOTICE

Damage to the device

If the CAN bus cable's shielding is connected to devices with different po­tential, current may flow over the shielding. This current may damage the
communication cards.

► Connect the devices to a potential compensation rail to compensate for

potential

► Ensure that the CAN bus cable's shielding is only connected to one de-

vice if both devices have different potentials.

Variant 1: The connected devices share the same potential

If the devices to be connected share the same potential, proceed as follows:

1. Connect all devices to a potential compensation rail to compensate for
the potential.

2. Connect CAN bus cable's shielding to all connected devices.

Variant 2: The connected devices have different potential

Note that the shielding is less effective with this variant.

If the devices to be connected have different potential, proceed as follows:
► Connect CAN bus cable's shielding to just one device.

Figure 30: Securing the shielding

1 Securing the CAN bus cable's shielding

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5 Mounting

5.3.4

5.3.5

Connecting cables to the system periphery

To obtain a better overview when connecting cables, only use as many
leads as necessary.

To connect cables to the system periphery, proceed as follows:
ü Use only the specified cables for wiring. Note the cable recommendation

[► 38].

► Connect the lines to be wired to the device to the system periphery as

shown in the connection diagrams supplied.

Supplying the voltage regulator using auxiliary voltage

The device is normally supplied by the voltage transformer. If the voltage
transformer does not provide the supply voltage and power (see "Technical
Data") needed for operation, the device must be supplied via a 88...265V
AC/DC, 50...60Hz auxiliary supply .

Proceed as follows to supply the device with auxiliary voltage:

1. NOTICE! Voltage transformer damage Connecting an auxiliary voltage
when bridges are present between the X2:1/3 and X2:2/4 terminals can
result in voltage transformer damage. Remove the bridges between the
terminals X2:1/3 and X2:2/4.

2. Connect the voltage transformer to terminals X2:1 and X2:2.

3. Connect the auxiliary voltage using the following terminals: X2:3 and
X2:4.

Figure 31: Voltage transformer and auxiliary supply connections

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5 Mounting

5.3.6

Wiring device

To obtain a better overview when connecting cables, only use as many
leads as necessary.

To wire the device, proceed as follows:
ü Use only the specified cables for wiring. Note the cable recommendation

[► 38].

ü Wire the lines to the system periphery [► 44].

1. Remove 4 hexagon socket screws from cover plate and take off cover
plate.

2. Disconnect the connectors required.

3. Remove 4 hexagon socket screws from the cable gland plate and take
off the cable gland plate.

4. Remove dummy plug from required cable glands in order to guide ca­bles through.

Unnecessary cable glands must be sealed with dummy plugs to guarantee
the IP54 protection category.

5.3.7

NOTICE

5. Strip insulation from lines and leads.

6. Crimp stranded wires with core cable ends.

7. Guide cables through the cable gland

8. Guide leads into corresponding connector terminals.

9. Fasten screws for the corresponding terminals using a screwdriver.

10. Guide the cable gland plate into the device opening provided for this
purpose.

11. Plug connectors into the correct slots.

12. Secure cable gland plate to device housing with 4 hexagon socket
screws.

Checking functional reliability

To ensure that the device is wired correctly, check its functional reliability.

Damage to device and system periphery

An incorrectly connected device can lead to damages in the device and sys­tem periphery.

► Check the entire configuration before commissioning.
► Prior to commissioning, be sure to check the actual voltage and operat-

ing voltage.

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Check the following:
▪ Once you have connected the device to the grid, the screen displays the

MR logo and then the operating screen.

▪ The green Operating display LED top left on the device's front panel

lights up.

The device is fully mounted and can be configured. The actions required for
this are described in the following chapter.

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6 Commissioning

Commissioning

6

You need to set several parameters and perform function tests before com­missioning the device. These are described in the following sections.

NOTICE

Damage to device and system periphery

An incorrectly connected device can lead to damages in the device and sys­tem periphery.

► Check the entire configuration before commissioning.
► Prior to commissioning, be sure to check the actual voltage and operat-

ing voltage.

We recommend using a device for industrial instrumentation to record the
actual transformer voltage value in order to evaluate how the device is func­tioning.

Setting the display contrast

6.1

You can adjust the contrast in the display with the help of an adjustment
screw on the front of the device. To adjust the contrast, proceed as follows:

► Use a screwdriver to turn the adjustment screw on the front until the

contrast is adjusted to the desired setting.

Figure 32: Setting the display contrast

Setting parameters

6.2

To commission the device, you must set the following parameters. For more
detailed information about the parameters, refer to the respective sections.

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6 Commissioning

6.2.1

6.2.2

Setting the language

You can use this parameter to set the display language for the device. The
following languages are available:

English Italian
German Portuguese
French Russian
Spanish

To set the language, proceed as follows:

1. > Configuration > General.
ð Language

2. Press or to select the required language.

3. Press .

ð The language is set.

Setting further parameters

Set further parameters to commission the device. More detailed information
about each of the parameters can be found in the Functions and settings
[► 59] chapter.

Setting transformer data

Set the transformer data and phase difference of the current transformer and
voltage transformer:

1. Set primary transformer voltage [► 92].

2. Set secondary transformer voltage [► 93].

3. Set primary transformer current [► 93].

4. Select current transformer connection [► 94].

5. Select transformer circuit [► 94].

Setting NORMset

If you want to quickly start up voltage regulation, you can activate NORMset
mode. If you want to set the parameters yourself, continue with the sections
below.

► Activate NORMset and set the relevant parameters [► 68].

Setting control parameters

Set the following control parameters:

1. Set desired value 1 [► 72].

2. Set the bandwidth [► 74].

3. Set delay time T1 [► 75].

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6 Commissioning

Setting line drop compensation (optional)

If you need line drop compensation, you must set all important parameters
for this:

1. Select LDC compensation method [► 86].

2. Set line data for the ohmic voltage drop Ur [► 88].

3. Set line data for the inductive voltage drop Ux [► 89].

Setting parallel operation (optional)

If you need parallel operation, you must set all important parameters for this:

1. Set parallel operation method to circulating reactive current method
[► 99].

2. Assign CAN bus address [► 98].

3. Set circulating reactive current sensitivity [► 100].

4. Set circulating reactive current blocking [► 100].

Setting tap position capture via analog input (optional)

If you want to capture the tap position via the analog input, you must set the
parameters required for this:

► Capture tap positions via analog input (PIO card terminal strip X7)

[► 107].

All parameters relevant to commissioning are entered. Continue with the
function tests.

Setting the desired voltage level remotely

If you would like to set the desired voltage level remotely, you must config­ure the necessary parameters:

► Activate "Set the desired voltage level remotely" and set the relevant pa-

rameters [► 109].

Function tests

6.3

Before switching from manual mode to auto mode, Maschinenfabrik Rein­hausen recommends carrying out function tests. These function tests are de­scribed in the following sections. Note the following points for all function
tests:

▪ You must ensure that the REMOTE mode is disabled before you can

control the on-load tap-changer manually in manual mode.

▪ You can only activate the on-load tap-changer manually in manual

mode using the and keys.

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6 Commissioning

▪ During the function test, you must set the most important parameters.

Details on the parameters listed can be found in the Functions and set­tings [► 59] chapter.

6.3.1

Checking control functions

This section describes how you can check the device's control functions:
ü Supply voltage must be present.

1. Press to select manual mode.

2. Set transmission ratio for voltage transformer, current transformer and
measuring arrangement.

3. Measure actual voltage and compare with the measured value dis­played on the device's main screen.

4. Press key several times to display the operating values for current,
power and phase angle and compare them with values of the operating
measuring instruments.

5. Control the on-load tap-changer manually with the or keys until
the measured voltage (V
the next stage.

6. Set desired value 1 to the value you want.

7. Set bandwidth in relation to step voltage [► 73].

8. Set delay time T1 to 20 seconds [► 75].

9. Set control response T1 to linear [► 76].

10. Press to raise the on-load tap-changer 1 step.

) reaches the desired voltage (V

actual

desired

) set in

11. Press to select auto mode.
ð After 20 seconds, the device returns the on-load tap-changer to the

original operating position.

12. Press to select manual mode.

13. Press to lower the on-load tap-changer 1 step.

14. Press to select auto mode.
ð After 20 seconds, the device returns the on-load tap-changer to the

original operating position.

15. Press to select manual mode.

16. Set delay time T2 to 10 seconds [► 76].

17. Activate delay time T2.

18. Press twice to raise the on-load tap-changer 2 steps.

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6 Commissioning

19. Press to select auto mode.
ð After 20 seconds, the device lowers the on-load tap-changer one

step and after another 10 seconds another step.

20. Press to select manual mode.

21. Set delay time T1 [► 75] and delay time T2 [► 76] to the desired
value.

We recommend a temporary setting of 100 seconds for delay time T1 when
commissioning the transformer. Depending on the operating conditions, you
can also specify the delay time following a longer observation period. In this
regard, it is useful to register how the actual voltage progresses and the
number of tap-change operations per day.

6.3.2

Checking additional functions

This section describes how you can check the following additional functions:
▪ Undervoltage blocking
▪ Overvoltage blocking
▪ Activation of desired values 2 and 3
▪ Line drop compensation
▪ Z compensation

Proceed as follows:

Checking undervoltage blocking U<

1. Press to select manual mode.

2. Set undervoltage U < [%] to 85 %.

3. Set the U< blocking parameter to On [► 79].

4. Set desired value 1 such that the measured voltage Uactual is below the
undervoltage U< [%] limit value.

Measured voltage = 100 V
Desired value 1 = Set to 120 V (greater than 100 V/0.85 = 117 V).

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ð The Undervoltage U< LED will light up.
ð After around 10 seconds the Undervoltage message appears in the

display and the relevant signaling relay is activated. Contact X4:1/3
closes and contact X4:2/3 opens.

5. Press to select auto mode.
ð The device blocks and does not issue any control commands.

6. Press to select manual mode.

6 Commissioning

7. Reset the operating values for desired value 1 and undervoltage U<
[%] to the desired operating values.

ð The function test for undervoltage blocking is complete.

Checking overvoltage blocking U>

1. Press to select manual mode.

2. Set overvoltage U> [%] to 115 %.

3. Set the absolute limit values parameter to Off.

4. Set desired value 1 such that the measured voltage Uactual is above
the overvoltage U> [%] limit value.

Measured voltage = 100 V
Desired value 1 = Set to 85 V (less than 100 V/1.15 = 87 V).

ð The Overvoltage U> LED will light up.
ð The Overvoltage message appears in the display and the relevant

signaling relay is activated. Contact X4:1/3 closes and contact
X4:2/3 opens.

5. Press to select auto mode.
ð The LOWER output relay emits a control command every 1.5 sec-

onds.

6. Press to select manual mode.

7. Reset the operating values for desired value 1 and overvoltage U>
[%] to the desired operating values.

ð The function test for overvoltage blocking is complete.

Checking desired value 2 and desired value 3

1. Press to select manual mode.

2. Set desired value 2 to the value you want.

3. Apply voltage L+ to terminal X4:17 desired value 2 (see connection dia­gram).

4. Press until the main screen is displayed.
ð Desired value 2 is shown on the main screen.

5. Set desired value 3 to the value you want.

6. Apply voltage L+ to terminal desired value 3 (see connection diagram).

7. Press until the main screen is displayed.

ð Desired value 3 is shown on the main screen.

ð The function test for desired value 2 and desired value 3 is complete.

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6 Commissioning

Checking line drop compensation

If you want to use line drop compensation, you need to run this function test.
A load current of ≥ 10 % of the nominal transformer current is needed for the
following function tests. Before the function test, ensure that all parameters
for line drop compensation and for Z compensation are set to 0.

1. Press to select manual mode.

2. Set the compensation method parameter to LDC.

3. Press until the main screen is displayed.

4. If necessary, press until the control deviation dU is shown.
ð The measured voltage must be within the bandwidth.

5. Set line drop compensation Ur parameter to 20.0 V.
ð The control deviation dU must be negative.

6. Set line drop compensation Ux parameter to -20.0 V.

7. Press until the main screen is displayed.

8. If necessary, press until the control deviation dU is shown.
ð The control deviation dU must be positive.

If the control deviation appears in the opposite direction, change the polarity
of the current transformer.

9. Set the line drop compensation Ur and line drop compensation Ux
parameters to the desired operating values.

ð The function test for line drop compensation is complete.

Checking Z compensation

If you want to use Z compensation, you need to run this function test. A load
current of ≥ 10 % of the nominal transformer current is needed for the follow­ing function test .

1. Press to select manual mode.

2. Set all parameters for line drop compensation and Z compensation to 0.

3. Set the compensation method parameter to Z.

4. Press until the main screen is displayed.

5. If necessary, press until the control deviation dU is shown.
ð The measured voltage must be within the bandwidth.

6. Set the Z compensation parameter to 15.0 V.

7. Press until the main screen is displayed.

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6 Commissioning

8. If necessary, press until the control deviation dU is shown.

ð The control deviation dU must be negative.

If the control deviation appears in the opposite direction, change the polarity
of the current transformer.

9. Set the Z compensation and Z compensation limit value parameters
to the desired operating values.

ð The function test for Z compensation is complete.

6.3.3

Checking parallel operation

This section describes how you can run the function test for parallel opera­tion.

Requirements

To obtain perfect functioning in parallel operation, the voltage regulator must
be commissioned in simplex mode. Make sure that the conditions below
have been fulfilled.

▪ All devices are set to the same operating parameters for desired value,

circulating reactive current sensitivity and delay time T1.

▪ The circulating reactive current sensitivity on all devices must be set to

0 %.

▪ The circulating reactive current blocking parameter must be set to

20 %.

▪ You must undertake all settings in manual mode.
▪ Each device needs an individual address on the CAN bus.

6.3.3.1

Checking circulating reactive current sensitivity

This section describes how to run the function test for circulating reactive
current sensitivity.

1. Adjust both transformers in simplex mode to the same actual voltage by
means of the on-load tap-changer.

ð When both devices are in a state of equilibrium, then the value of

the control deviation dV [%] is smaller than the set bandwidth. You
can see this in the main screen if the mark for the measured volt­age U

is within the bandwidth.

actual

2. Connect the transformers in parallel and enable the parallel control.

ð The two devices must still be in a state of equilibrium.
ð The Parallel operation LED on the front panel is illuminated.

3. On one of the two transformers, raise the tap position of the on-load tap­changer by one setting; on the second transformer, lower the tap posi­tion of the on-load tap-changer by one setting.

ð The two devices must still be in a state of equilibrium.

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6 Commissioning

4. Adjust the circulating reactive current sensitivity until the result dis­played exceeds the set value for the bandwidth by approx. 0.2 % to

0.3 %.
ð The value for the result changes in the help text in the last line of

the display.

5. Set the value given in the previous step for all devices in parallel opera­tion.

6. Press to select auto mode for both devices.
ð The devices return the on-load tap-changer units to the original tap

positions.

ð The function test for circulating reactive current sensitivity is complete.

If the earlier tap positions are not reached, increase the value of the circulat­ing reactive current sensitivity [► 100] parameter.

If one of the two on-load tap-changer units switches one or more tap posi­tions higher and the other switches the same amount lower, you need to re­duce the value of the circulating reactive current sensitivity [► 100] parame­ter.

After you have set the circulating reactive current sensitivity parameter,
continue with the circulating reactive current blocking function test described
in the next section.

6.3.3.2

Checking circulating reactive current blocking

This section describes how to run the function test for circulating reactive
current blocking.

1. Press on one device to select manual mode.

2. Using manual control, adjust the relevant motor-drive unit upwards by
the maximum permitted tap difference in operating positions between
the parallel operating transformers (for example by 1 - 2 steps).

When setting the circulating reactive current blocking in the following proc­ess step, wait approx. 2 - 3 seconds between the individual steps.

3. Set the parallel operation method parameter to circulating reactive
current.

4. The circulating reactive current blocking parameter should be re­duced [► 100] from the set value of 20 % in steps of 1 % until the Par-
allel operation error: circulating reactive current limit exceeded is dis­played.

ð The Parallel operation LED lights up when the circulating reactive

current blocking limit is reached.

ð Any further regulation is blocked.

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6 Commissioning

5. After the set delay time for the parallel operation error message (time
can be adjusted [► 104]), the signaling relay X5:12 (default setting) is
activated.

6. Increase the circulating reactive current blocking parameter again
until the message Parallel operation error: circulating reactive current
limit exceeded disappears.

7. Press to select auto mode.
ð The motor-drive unit automatically returns to the original operating

position.

8. Set the value determined for the circulating reactive current blocking
on the devices in parallel operation as well.

If one or all devices indicate Parallel operation error: circulating reactive cur-
rent limit exceeded although the control inputs are correctly connected for
all the devices, then all the devices block.

This could be due to various causes. Further information is given in the
chapter Troubleshooting [► 126].

6.3.3.3

NOTICE

ð The function test for circulating reactive current blocking is complete.

Checking tap synchronization method

This section describes how to run the function test for tap synchronization
(master/follower). If instances arise where a follower switches in the opposite
direction to the master step change, then the setting for the tapping direction
parameter on the follower must be changed from Default to Swapped.

Damage resulting from formation of circulating reactive current

If the parameters are not set correctly, damage may result from the forma­tion of circulating reactive current and the resulting overload of transmission
lines and transformers.

► Check transformer type plate.
► Set device parameters in accordance with transformer configuration.

Before starting the function test, you must carry out the following steps:

1. Assign the master function to one device.

2. Assign the follower function to the other devices.

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6 Commissioning

3. Compare the tap position displays of devices / . All devices must
display the same tap position; if not, switch them into the same one.

Figure 33: Comparing tap positions

1 Master 3 Tap position display
2 Follower

To perform the function test, proceed as follows:

1. Press on the follower to select manual mode.

2. If necessary, set the follower tapping direction.

3. Press on the master to select manual mode.

4. Press or on the master to manually change the tap position.

5. Press on the follower to select auto mode.
ð The follower follows the master's control command.

6. Press on the master to select auto mode.

7. Press on the follower to select manual mode.

8. Press or on the follower to manually change the tap position.
ð After expiry of the set delay time for parallel operation errors

[► 104], the Tap difference to follower error message is displayed
in the main screen on the master.

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6 Commissioning

9. Press several times on the follower to manually increase the tap
position by the number of permitted steps (maximum permitted tap dif­ference) and then one more step.

ð After expiry of the set delay time for parallel operation errors, the

following error messages are displayed on the master: Parallel op-

eration error: tap difference to follower

ð After expiry of the set delay time for parallel operation errors, the

following error messages are displayed on the follower: Parallel op-
eration error: permitted tap difference to master exceeded.

10. Press on the follower to select auto mode.
ð There is no response. All devices remain blocked.

11. Press on the master and follower to select manual mode.

12. Press or on the master and follower to manually set the de­sired step.

Because in parallel operation the tap positions of the transformers which are
running in parallel are compared following the Automatic tap synchroniza-
tion method, it is absolutely essential that these transformers have the
same position designation and that the Raise and Lower signals produce
the same voltage change in all transformers.

ð The function tests for the tap synchronization method are complete.

Installation and commissioning of the device is complete.

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7 Functions and settings

Functions and settings

7

This chapter describes all the functions and setting options for the device.

Key lock

7.1

The device is equipped with a key lock to prevent unintentional operation.
You can only set or change the parameters when the key lock is deactivated
in manual mode.

Activating key lock

To activate the key lock, proceed as follows:

► Press and at the same time.
ð A confirmation appears in the display for a brief period. The key lock is

activated. Parameters can no longer be entered.

Deactivating key lock

To deactivate the key lock, proceed as follows:

► Press and at the same time.
ð The key lock is deactivated. Parameters can be entered.

General

7.2

You can undertake general settings on the device in the General menu item.
You can set the following general parameters:

▪ Language [► 48]
▪ Regulator ID
▪ Baud rate (COM1 setting)
▪ Raise/Lower pulse duration
▪ Operations counter
▪ Display dimming
▪ Key lock
▪ Function monitoring
▪ Motor runtime
▪ Manual mode/auto mode
▪ Local/Remote

7.2.1

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Setting device ID

You can use the device ID parameter to assign a 4-digit ID to the device.
This ID is used to uniquely identify the device in the TAPCON®-trol software.

To set the device ID, proceed as follows:

7 Functions and settings

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Regulator ID.

2. Press to change the first digit.
ð If you wish to enter a multi-digit sequence, proceed to step 3. If you

do not wish to enter additional digits, proceed to step 7.

3. Press (digit > 9) until another digit position appears.

4. If necessary, press in order to highlight the digit position.
ð The required digit is highlighted and can be changed.

5. Press or to change the digit.

6. Repeat steps 3 to 5 until all required digits have been entered.

7. Press .

ð The device ID is set.

7.2.2

7.2.3

Setting the baud rate

You can use this parameter to set the COM1 interface's baud rate. You can
select the following options:

▪ 9.6 kilobaud
▪ 19.2 kilobaud
▪ 38.4 kilobaud
▪ 57.6 kilobaud

To set the baud rate, proceed as follows:

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Baud rate.

2. Press or to select the required baud rate.

3. Press .

ð The baud rate is set.

Setting the switching pulse time

You can use this parameter to set the duration of the switching pulse for the
motor-drive unit.

If you set the switching pulse time to 0 s, the motor-drive unit is activated
with a continuous signal. The signal then remains active for as long as the

or keys are pressed.

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7 Functions and settings

Switching pulse in normal

mode

If you set the switching pulse time to 1.5 seconds for example, after the set
delay time T1 or delay time T2 there will be a switching pulse of 1.5 sec-
onds .

The waiting time between 2 consecutive switching pulses corresponds to the
set delay time T1 or delay time T2 .

Switching pulse for rapid

return control

Figure 35: Switching pulse time in normal mode

1 Set delay time T1 or T2 2 Set switching pulse time (for

example 1.5 seconds)

If the motor-drive unit does not start with the factory setting (1.5 seconds),
you need to extend the raise switching pulse time / lower switching pulse
time.

If you set the raise switching pulse time or lower switching pulse time to

1.5 seconds, for example , the next earliest switching pulse occurs in rapid
return control mode 1.5 seconds after the previous switching pulse

ended.

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Figure 36: Switching pulse in rapid return control mode

7 Functions and settings

7.2.4

1 Start of first raise switching

pulse/lower switching pulse

3 Earliest time for the next raise

switching pulse/lower switch­ing pulse (for example

1.5 seconds)

2 Set switching pulse time (for

example 1.5 seconds)

To set the pulse duration, proceed as follows:

1. > Configuration > General > Press until the desired
parameter is displayed.

ð R/L pulse duration.

2. Press or to select the pulse duration you want.

3. Press .

ð The R/L pulse duration is now set.

Setting operations counter

The device's operations counter is automatically increased with every tap­change operation. You can use this parameter to set the number of tap­change operations for comparing with the operations counter of the motor­drive unit, for example.

To ensure correct operation counter function, the Motor running signal of the
motor-drive unit must be connected with a configurable input (GPI 1...6) and
then the Motor running function assigned to this input.

To set the operations counter, proceed as follows:

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7 Functions and settings

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Operations counter.

2. Press to highlight a digit.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The operations counter is set.

7.2.5

Dimming display

You can use this parameter to activate or deactivate automatic display dim­ming. You can select the following options:

▪ On: The display is automatically dimmed if no key is pressed for 15 mi-

nutes. The display returns to full brightness by pressing any key.

▪ Off: Automatic display dimming is deactivated.

Activating this function extends the display's service life.

To activate/deactivate automatic display dimming, proceed as follows:

1. Press > Configuration > General > until the desired
parameter is displayed.

ð Display off.

2. Press or to activate/deactivate automatic dimming.

3. Press .

ð Automatic dimming is set.

7.2.6

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Activating/deactivating the automatic key lock

Activating this function automatically activates the key lock if no keys are
pressed for 15 minutes. You can also lock the keys manually. This function
can be deactivated as well.

To set the automatic key lock, proceed as follows:

7 Functions and settings

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Key lock

2. Press or to select On or Off.

3. Press .

ð Automatic key lock is set.

7.2.7

Switched-off transformer

Activate/deactivate

message

"Function monitoring" message for monitoring messages <30 V

By default, the Function monitoring message is activated for measured vol­tages. This message is issued as soon as the measured voltage is under
30 V for longer than the set signaling delay time.

You can suppress the message with this parameter to prevent the message
from being continuously issued when a transformer is shut off.

The device behaves as follows:

Parameter Function

On The Function monitoring message is issued after

the configured delay time if the measured voltage is
less than 30 V.

Off The Function monitoring message is suppressed if

the measured voltage is less than 30 V.

Table 8: Settings

To activate/deactivate function monitoring, proceed as follows:

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Function monitoring

Setting delay time

2. Press or to select On or Off.

3. Press .

ð The Function monitoring message for is activated/deactivated for meas-

ured voltages <30 V.

You can configure the delay time after which the Function monitoring mes­sage is to be issued. If you select 0, function monitoring is deactivated.

To set the delay time for the Function monitoring message, proceed as fol­lows:

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7 Functions and settings

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Delay function monitoring

2. Press to increase the value or to reduce it.

3. Press .

ð The delay time for the Function monitoring message is set.

7.2.8

Behavior

Parameterizing control

input

Wiring control input/output

relay

Setting motor runtime monitoring

You can use this motor runtime parameter to set the motor runtime. The mo­tor-drive unit's runtime can also be monitored by the device. This function is
used to identify motor-drive unit malfunctions during the tap-change opera­tion and to trigger any actions needed.

The motor-drive unit issues the Motor-drive unit running signal during the
tap-change operation. This signal is present until the tap-change operation is
complete. The device compares the duration of this signal with the set motor
runtime. If the set motor runtime is exceeded, the device triggers the follow­ing actions:

1. Motor runtime monitoring message is issued

2. Continuous signal via output relay Motor-drive unit runtime exceeded
(optional)

3. Pulse signal via Trigger motor protective switch output relay (optional)

To use runtime monitoring, you need to correctly wire the corresponding
control input and parameterize to Motor running. The motor runtime must al­so be set.

If you want to monitor the motor runtime, the device and motor-drive unit
must be connected and parameterized as shown below.

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7 Functions and settings

Figure 38: Wiring for motor runtime monitoring

1 Motor running control input

I/O

3 Motor protective switch trip-

ped GPO output relay (option­al)

2 Motor protective switch trig-

gered control input I/O (op-

4 Motor runtime exceeded GPO

output relay (optional)

tional)

If you want to use the output relay, the feedback from the motor-drive unit
Motor protective switch triggered must be wired to a control input and para­meterized. This message resets the Motor runtime exceeded output relay
when the motor protective switch is switched back on and activates the Mo-
tor protective switch triggered message.

If the runtime monitoring is set to "0.0 s", this equates to it being switched
off.

To set the motor runtime, proceed as follows:

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7 Functions and settings

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Motor runtime.

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The motor runtime is set.

7.2.9

Activate manual mode/auto mode

This parameter can be used to activate the Manual or Automatic operation
modes. This parameter has the same functions as the and keys.

Parameter Function

Manual Device is no longer controlling automatically.

You can set or change parameters manually.
You can control the motor-drive unit using

the control panel.

Auto The device is controlling the voltage auto-

matically.
You cannot set or change any parameters.
You cannot control the motor-drive unit using

the control panel.

Table 9: Adjustable parameters

To select the operating mode, proceed as follows:

1. > Configuration > General > Press until the desired
parameter is displayed.

ð Manual/Automatic

2. Press or to select the operating mode you want.

3. Press .

ð The operating mode is set.

7.2.10

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Activating Local/Remote

This parameter can be used to activate the Local or Remote operation
modes. This parameter has the same functions as the keys.

7 Functions and settings

Parameter Function

Local You can operate the device using the control

panel.

Remote You can operate the device using an external

control level.
Manual operation is disabled.

Table 10: Adjustable parameters

To activate Manual or Automatic operating mode, proceed as follows:

1. > Configuration > General > Press until the desired
parameter is displayed.

2. Local/Remote

3. Press or to select the operating mode you want.

4. Press .

ð The operating mode is set.

NORMset

7.3

NORMset mode is used for quickly starting voltage regulation. In NORMset
mode, the bandwidth and delay time parameters are automatically adapted
to the requirements of the grid.

To start NORMset mode, you must set the following parameters:
▪ Normset activation
▪ Desired value 1
▪ Primary voltage
▪ Secondary voltage

Line drop compensation cannot be performed in NORMset mode.

Set the following parameters to operate the device in NORMset mode.

Activating/deactivating NORMset

You can use this parameter to activate NORMset mode.

A manual tap-change operation is required to activate NORMset. This is
how the voltage regulator determines the bandwidth required.

If the transformer is switched off, another manual tap-change operation is
required.

To activate/deactivate NORMset mode, proceed as follows:

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7 Functions and settings

1. > NORMset
ð NORMset activation.

2. Press or to activate NORMset by selecting On or to deactivate
NORMset by selecting Off.

3. Press .

ð NORMset is activated/deactivated.

Setting the primary voltage

With this parameter, you can set the voltage transformer's primary voltage.

To set the primary voltage, proceed as follows:

1. > NORMset > Press until the desired parameter is dis­played.

ð Primary voltage.

2. Press to increase the value or to reduce it.

3. Press .

ð The primary voltage is set.

Setting the secondary voltage

With this parameter, you can set the voltage transformer's secondary volt­age.

To set the secondary voltage, proceed as follows:

1. > NORMset > Press until the desired parameter is dis­played.

ð Secondary voltage.

2. Press to increase the value or to reduce it.

3. Press .

ð The secondary voltage is set.

Setting desired value 1

With this parameter, you can set the desired value for automatic voltage reg­ulation. You can enter the desired value in V or in kV. If you enter the de­sired value in V, the value relates to the voltage transformer's secondary
voltage. If you set the desired value in kV, the value relates to the voltage
transformer's primary voltage.

Settings in kV are only possible if you have previously entered the parame­ters for primary and secondary voltage.

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7 Functions and settings

To set the desired value, proceed as follows:

1. > NORMset > Press until the desired parameter is dis­played.

ð Desired value 1.

2. Press to increase the value or to reduce it.

3. Press .

ð The desired value is set.

Control parameters

7.4

All of the required for the regulation function are described in this section.
For voltage regulation, you can set the following parameters:

▪ Desired values 1…3
▪ Bandwidth
▪ Delay time T1
▪ Control response T1
▪ Delay time T2

For voltage regulation, you can set delay time T1 and also delay time T2.
The following sections describe how the regulation function responds in both
cases:

Response only to delay time T1

If the measured voltage V

is within the set bandwidth , no control

actual

commands are issued to the motor-drive unit for the tap-change operation.
Control commands will also not be issued to the motor-drive unit if within the

set delay time T1
width

. However, if the measured voltage deviates from the set bandwidth

for a long period

the measured voltage returns to the tolerance band-

, a tap-change command occurs after the set delay
time T1. The on-load tap-changer carries out a tap-change in a positive or
negative direction to return to the tolerance bandwidth.

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7 Functions and settings

Figure 39: Response of the regulation function with delay time T1

1 + B %: Upper limit 4 Set delay time T1
2 V

: Desired value 5 V

desired

: Measured voltage

actual

3 - B %: Lower limit 6 B%: Tolerance bandwidth

A V

is outside the band-

actual

width. Delay time T1 starts.

B V

is within the bandwidth

actual

before delay time T1 is com­plete.

C V

is outside the band-

actual

width. Delay time T1 starts.

D V

is still outside the band-

actual

width when delay time T1 is
complete. Tap-change opera­tion is initiated.

Response with delay times T1 and T2

Delay time T2 can be used to correct major control deviations more quickly.
Ensure that you set a lower value for delay time T2 than delay time T1.

If the measured voltage V

deviates from the set bandwidth for a long

actual

period , a control impulse is output to the motor-drive unit after the set de­lay time T1 . If the measured voltage V
delay time T2

starts once delay time T1 is complete. Once delay time T2

is still outside the bandwidth,

actual

is complete, a control impulse is again output to the motor-drive unit for the
tap change to return to the tolerance bandwidth.

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7 Functions and settings

7.4.1

Options for setting the

desired values

Figure 40: Response of the regulation function with delay times T1 and T2

1 + B %: Upper limit 4 Set delay times T1 and T2.
2 V

: Desired value 5 V

desired

: Measured voltage

actual

3 - B %: Lower limit 6 B%: Tolerance bandwidth

A V

C Delay time T2 complete. Tap

is outside the band-

actual

width. Delay time T1 starts.

B Delay time T1 complete. Tap

change triggered.

change triggered.

The following sections describe how to set the relevant control parameters.

Setting desired value 1...3

You can use this parameter to set up to 3 desired voltage values U
desired voltage value is specified as a fixed value. The desired value 1 is the
default desired value. Desired values 2 and 3 are activated if there is a con­tinuous signal at factory-preset control inputs X4:17 or X4:18 provided you
have programmed these previously. If there is a signal at several control in­puts at the same time, desired value 2 is activated.

The device provides the following ways of changing the desired voltage val­ue during operation:

▪ Using the control parameters menu item via the operating screen
▪ Using binary inputs
▪ Using control system protocols if a communication card is ready for op-

eration

Ref

. The

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7 Functions and settings

Reference of kV and V for

voltage transformer

7.4.2

Desired values set in kV refer to the primary voltage of the voltage trans­former. Desired values set in V refer to the secondary voltage of the voltage
transformer. The transformer data must be entered correctly for this display.

To set the desired value, proceed as follows:

1. > Control parameter > voltage regulator > Press until
the desired parameter is displayed.

2. If you have already entered the transformer data, press to select
the unit you want: "V" or "kV".

3. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

4. Press to increase the value or to reduce it.

5. Press .

ð The desired value is set.

Selecting a desired value

You can use this parameter to select the active desired value 1, 2 or 3.

If you select the desired value using appropriately configured GPIs, this pa­rameter's setting is ignored. Refer to the Configuration [► 112] section for
more information about GPI configuration.

Proceed as follows to select a desired value:

1. > Control parameter > Voltage regulation > Press
until the desired parameter is displayed.

ð Desired value selection

2. Press or to select an active desired value.

3. Press .

ð The selected desired value is active.

7.4.3

Bandwidth

You can use this parameter to set the maximum permissible deviation in
measured voltage U

. The deviation relates to the activated desired value.

Act

The following sections describe how you determine and set the bandwidth
required.

7.4.3.1

Determining bandwidth

In order to set the correct value, the transformer's step voltage and nominal
voltage must be known.

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7 Functions and settings

Too small/large a

bandwidth

You have to set the bandwidth in such a way that the output voltage of the
transformer (V

) returns to within the specified tolerance bandwidth after the

Act

tap change. If too small a bandwidth is defined, the output voltage exceeds
the bandwidth selected and the device immediately issues a tap-change
command in the opposite direction. If a very large bandwidth is selected, this
results in a major control deviation.

The following value is recommended for the bandwidth setting:

Figure 42: Recommended bandwidth

U
U
U

Step voltage of tap position n-1

n-1

Step voltage of tap position n

n

Nominal voltage

nom

The following transformer values are used to determine the recommended
bandwidth:

Nominal voltage U

Step voltage in tap position 4 U

Step voltage in tap position 5 U

= 11,000 V

nom

= 11,275 V

Step4

= 11,000 V

Step5

7.4.3.2

The following section describes how you can set the bandwidth.

Setting the bandwidth

To enter the determined bandwidth, proceed as follows:

1. > Parameter > Control parameter > Press until the
desired parameter is displayed.

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

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7 Functions and settings

4. Press .
ð The bandwidth is set.

7.4.3.3

Visual display

The deviation from the set bandwidth is shown visually in the device's dis­play. The measured voltage highlighting shows whether the measured
voltage is above, within or below the set bandwidth . Progress of delay
time T1 is indicated by the gradual filling of the time bar

. The seconds

display above this indicates the remaining delay time T1.

Figure 43: Visual display of deviation from desired value

1 Bandwidth (upper and lower

4 Desired voltage value U

Ref

limit)
2 Time bar for delay time T1 5 Remaining delay time T1
3 Measured voltage U

Act

7.4.4

Setting delay time T1

Use this parameter to set delay time T1. This function delays the issuing of a
tap-change command for a defined period. This prevents unnecessary tap­change operations if the tolerance bandwidth is exited.

To set the delay time T1, proceed as follows:

1. > Parameter > Control parameter > Press until the
desired parameter is displayed.

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the time or to reduce it.

4. Press .

ð The delay time T1 is set.

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7 Functions and settings

7.4.5

Linear control response T1

Integral control response

T1

Setting control response T1

The control response T1 can be set to linear or integral.

With linear control response, the device responds with a constant delay time
regardless of the control deviation.

With integral control response, the device responds with a variable delay
time depending on the control deviation. The greater the control deviation
(ΔV) in relation to the set bandwidth (B), the shorter the delay time. The de­lay time can therefore be reduced down to 1 second. This means that the
device responds faster to large voltage changes in the grid. Regulation accu­racy improves as a result but the frequency of tap-changes increases too.

7.4.6

Figure 44: Diagram showing integral control response

ΔV/B Control deviation "ΔV" as % of desired value as ratio to the set

bandwidth "B" as % of desired value

1 "Delay time T1" parameter

To set the control response T1, proceed as follows:

1. > Parameter > Control parameter > Press until the
desired parameter is displayed.

2. Press or to set the response you want.

3. Press .

ð The control response T1 is set.

Setting delay time T2

With this parameter, you can set delay time T2. Delay time T2 is used to
compensate for large control deviations faster.

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7 Functions and settings

The delay time T2 only takes effect if more than one tap-change operation is
required to return the voltage to within the set bandwidth. The first output
pulse occurs after the set delay time T1. After the set tap-change delay time
T2 has elapsed, additional pulses occur in order to correct the existing con­trol deviation.

The following requirements must be noted to set delay time T2:
▪ The delay time T2 must be greater than the switching pulse time.
▪ The delay time T2 must be greater than the maximum operating time of

the motor-drive unit.

▪ The delay time T2 must be less than the value set for delay time T1.

To set the delay time T2, proceed as follows:

1. > Parameter > Control parameter > Press until the de­sired parameter is displayed.

ð Delay time T2.

2. Press to increase the time or to reduce it.

3. Press .

ð The delay time T2 is set.

Activating/deactivating delay time T2

To activate/deactivate delay time T2 , proceed as follows:

1. > Parameter > Control parameter > Press until the
desired parameter is displayed.

ð T2 activation.

2. Press or to activate/deactivate T2.

3. Press .

ð The delay time T2 is activated/deactivated.

Limit values

7.5

In the Limit values menu item, you can set all the parameters needed for lim­it value monitoring as relative or absolute values. You can set three limit val­ues:

▪ Undervoltage V<
▪ Overvoltage V>
▪ Overcurrent I>

Limit value monitoring is used to reduce damage to the system periphery.
The following sections describe how you can set the parameters.

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7 Functions and settings

7.5.1

Behavior

Setting undervoltage monitoring U<

You can use these parameters to set the limit values for an undervoltage.
Undervoltage monitoring prevents tap-change operations if there is a power
cut.

If the measured voltage U
LED U< lights up . The switching pulses to the motor-drive unit are blocked
at the same time provided you have activated the blocking undervoltage U<

parameter. Once the set signaling delay time [► 79]
signaling relay activates (contact X4:1/3 closes and X4:2/3 opens). The Un-

dervoltage U< message appears in the display. The message is reset as
soon as the measured voltage U

voltage

. If the measured voltage U
when the transformer is switched off), the Undervoltage message is also dis­played. You can however suppress [► 80] this message.

falls below the set limit value , the red

actual

has passed, the

again exceeds the limit value for under-

actual

falls below 30 V (for example

actual

Figure 45: Response to value falling below limit value

1 + B %: Upper limit 7 U
2 U

: Desired value A Value falls below limit value

desired

: Measured voltage

actual

3 - B %: Lower limit B Undervoltage U< message is

displayed

4 Set limit value for undervolt-

C Voltage falls below 30 V

age U<

5 Limit value for suppressing

D Voltage exceeds 30 V again

alarms below 30 V

6 Set signaling delay time for

E Value exceeds limit value
limit value for undervoltage
U<

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Setting undervoltage monitoring U< in %

Use the parameter to set the limit value as a relative value.

To set the limit value for undervoltage U< as %, proceed as follows:

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð U< Undervoltage (%)

2. Press to increase the value or to reduce it.

3. Press .

ð The limit value for undervoltage U< is set.

Setting signaling delay for undervoltage U<

You can use this parameter to set the delay time after which the Undervolt­age relay is to activate and the event message appear on the display. This

can be used to prevent messages from being issued when the value briefly
falls below the limit value. The undervoltage LED always lights up immedi­ately regardless.

To set the delay time for this message, proceed as follows:

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð U< Delay

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the time or to reduce it.

4. Press .

ð The signaling delay time for undervoltage U< is set.

Activating/deactivating undervoltage blocking

You can use this parameter to set how the device behaves if the voltage falls
below the undervoltage limit. You can select the following options:

Setting Function

On Automatic regulation is blocked.
Off Automatic regulation remains active.

Table 11: Behavior

To activate/deactivate the undervoltage blocking, proceed as follows:

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7 Functions and settings

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð U< blocking.

2. Press for On setting or for Off setting.

3. Press .

ð Undervoltage blocking is activated/deactivated.

Activating/deactivating message for voltages below 30 V

You can use this parameter to set whether the Undervoltage message is to
be suppressed at a measured value of less than 30 V. This setting is used to
ensure that no event message appears when the transformer is switched off.
You can select the following options:

Setting Function

On The Undervoltage message is also displayed

when the measured value is less than 30 V.

Off The Undervoltage message is no longer dis-

played when the measured value is less than
30 V.

Table 12: Response

7.5.2

Response to high-speed

return

To activate/deactivate the message, proceed as follows:

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð U< also under 30 V.

2. Press for On setting or for Off setting.

3. Press .

ð The message is activated/deactivated.

Setting overvoltage monitoring U>

You can use these parameters to set the limit values for overvoltage moni­toring. This overvoltage monitoring triggers tap-change operations to return
to the desired operating status. If the operating status can no longer be cor­rected, a message is triggered by the Function monitoring relay.

If the measured voltage V
and associated signaling relay activate (contact X4:1/3 opens and X4:2/3
closes). The Overvoltage V> message appears in the display. At the same
time, the high-speed return function is activated without delay time T1. Once

the set switching pulse time
activating the motor-drive unit until the measured voltage V
below the limit value . The Overvoltage V> message is reset.

exceeds the set limit value , the red LED V>

actual

has passed, the tap position is lowered by

again falls

actual

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7 Functions and settings

Response to overvoltage

blocking

Figure 46: Response to limit value being exceeded

1 Set limit value for overvoltage

6 V

: Measured voltage

actual

V>
2 + B %: Upper limit A Value exceeds limit value
3 V

: Desired value B Value falls below limit value

desired

4 - B %: Lower limit C High-speed return is started

(lower tap-change)

5 Set switching pulse time

If you activated the overvoltage blocking, all switching pulses to the motor­drive unit are blocked when a limit value is exceeded. At the same time, the
red LED U> lights up and the Overvoltage U> message is displayed. As
soon as the measured voltage U

has again fallen below the limit value,

actual

blocking and the message are reset.

The following sections describe how you can set the parameters for the
overvoltage U> limit value.

Setting overvoltage U> as %

The limit value is entered as a relative value (%) of the set desired value. To
set the limit value, proceed as follows:

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7 Functions and settings

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð U> Overvoltage (%)

2. Press to increase the value or to reduce it.

3. Press .

ð The limit value is set.

Activating overvoltage blocking/high-speed return

You can use this parameter to set how the device responds to overvoltage.
The following settings are possible:

Setting Behavior

On During overvoltage, the device blocks all switch

pulses to the motor-drive unit.

Off In the event of overvoltage, a high-speed return

is undertaken until the value again falls below the
limit value.

Table 13: Possible settings

7.5.3

To set the device's response to overvoltage, proceed as follows:

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð Overvolt. blocking U>.

2. Press or to set the option you want.

3. Press .

ð The response is set.

Setting overcurrent monitoring I>

You can use this parameter to set the limit value for overcurrent to prevent
tap-change operations in the event of excess load currents.

If the measured current exceeds the set limit value, the red LED I> lights up.
The Overcurrent message appears in the display. The device's output pulses
are blocked at the same time.

Setting overcurrent I> as %

To set the limit value I> overcurrent for overcurrent blocking, proceed as fol­lows:

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7 Functions and settings

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð I> Overcurrent

2. Press to increase the value or to reduce it.

3. Press .

ð The limit value is set.

Activating/deactivating overcurrent monitoring

To activate/deactivate overcurrent monitoring, proceed as follows:

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð Blocking Overcurrent I>

2. Press or to activate (On)/deactivate (Off) overcurrent monitor­ing.

7.5.4

3. Press .

ð Overcurrent monitoring is activated/deactivated.

Set undercurrent monitoring I<

These parameters are used to set undercurrent monitoring. As soon as the
measured current falls below the set limit value, control is blocked.

Setting undercurrent I<

To set the limit value for undercurrent monitoring, proceed as follows:

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð Undercurrent I< [%]

2. Press to increase the value or to reduce it.

3. Press .

ð The I< undercurrent limit value is set.

Activating/deactivating I< undercurrent blocking

To activate/deactivate undercurrent monitoring, proceed as follows:

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7 Functions and settings

1. > Control parameter > Limit values > Press until the
desired parameter is displayed.

ð Blocking undercurrent I>.

2. Press or to activate (ON)/deactivate (OFF) undercurrent block­ing.

3. Press .

ð The I< undercurrent blocking is activated/deactivated.

7.5.5

7.5.6

Activate/deactivate active power monitoring

This parameter can be used to set active power monitoring. If blocking is ac­tivated, the control is blocked if a negative active power flow is detected.
However, this is only possible if the current transformer connection is con­nected and correctly set. When regulator blocking is deactivated, then the
sign of the active power does not affect the regulation.

To activate/deactivate regulator blocking, proceed as follows:

1. > control parameter > Compensation > Press until
the desired parameter is displayed.

ð Neg. active power block.

2. Press or to select the option you want.

3. Press .

ð Blocking the regulator with negative active power is activated/deactivat-

ed.

Permitted tap positions

You can use the parameters described below to restrict the permissible
range of tap positions in auto mode. If you activate this function, the device
does not switch to tap positions outside the set limits in auto mode.

7.5.6.1

In manual mode, for manual tap changes on the motor-drive unit or for re­mote tap changes via a SCADA system, monitoring of the step limits is not
active. This may result in the set limits being exceeded.

When switching from manual to auto mode, the tap changer should be with­in the permitted tap positions.

Setting the lowest tap position blocking limit

You can define a lower tap position blocking limit to limit the number of tap
positions available in operation. When the tap position defined as lower tap
position blocking limit is reached, tap position blocking is activated. This pre­vents any further tap change downwards.

To define the lower tap position blocking limit, proceed as follows:

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7 Functions and settings

1. > Configuration > Continue > Continue > Tap
position > Press until the desired parameter is displayed.

ð Lowest tap position

2. Press to highlight a digit.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The lower tap position blocking limit is defined.

7.5.6.2

7.5.6.3

Setting highest tap position blocking limit

You can define an upper tap position blocking limit to limit the number of tap
positions available in operation. When the tap position defined as the upper
tap position blocking limit is reached, tap position blocking is activated. This
prevents any further tap change upwards.

To define the upper tap position blocking limit, proceed as follows:

1. > Configuration > Continue > Continue > Tap
position > Press until the desired parameter is displayed.

ð Highest tap position

2. Press to highlight a digit.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The upper blocking limit is defined.

Setting the tap position blocking mode

You can set the tap position blocking mode in relation to the upper and lower
tap position blocking limits:

Setting Behavior

Off The tap position blocking mode is deactivated
Directional During raise and lower tap changes, the device

blocks as soon as the defined upper/lower tap
position limit is reached or exceeded. Further
tap changes are prevented.

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7 Functions and settings

Setting Behavior

Non-directional The device blocks in both directions as soon as

the defined lower/upper tap position limit is
reached or exceeded. Further tap changes are
prevented.

Table 14: Tap position blocking mode

To set the tap position blocking mode, proceed as follows:

ü Press to select manual mode.

ü Press to change back manually into the defined tap position limits.

1. > Configuration > Continue > Continue > Tap
position > Press until the desired parameter is displayed.

ð Tap pos. blocking mode

2. Press or to set the option you want.

3. Press .

ð The tap position blocking mode is set.

Compensation

7.6

You can use the compensation function to compensate for the load-depend­ent voltage drop between the transformer and consumer. The device pro­vides 2 methods of compensation for this purpose:

▪ Line drop compensation
▪ Z compensation

Line drop compensation Z compensation

More accurate compensation Can only be used with minor

changes in the phase angle φ

Full knowledge of the line data
needed

More parameters needed for con­figuration

- Can be used with meshed net-

Table 15: Comparison of methods of compensation

Is not dependent on phase angle φ

Is simple to set

works

7.6.1

Line drop compensation

Line drop compensation (LDC) requires exact line data. Line voltage drops
can be compensated very accurately using LDC.

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7 Functions and settings

To set line drop compensation correctly, you need to calculate the ohmic
and inductive voltage drop in V with reference to the secondary side of the
voltage transformer. You also need to correctly set the transformer circuit
used.

Figure 49: Line drop compensation equivalent circuit

Figure 50: Illustration showing line drop compensation

You can calculate the ohmic and inductive voltage drop using the following
formulas. This voltage drop calculation relates to the relativized voltage on
the secondary side of the voltage transformer.

Formula for calculating the ohmic voltage drop:

Formula for calculating the inductive voltage drop:

U

r

U

x

Ohmic line parameter in Ω/km
Inductive line parameter in Ω/km

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7 Functions and settings

I

N

Nominal current (amps) of selected current trans­former connection on device:1 A; 5 A

k

CT

k

VT

Current transformer ratio

Voltage transformer ratio
r Ohmic line parameter in Ω/km per phase
x Inductive line parameter in Ω/km per phase
L Length of line in km
K Nominal current factor

Selecting the line drop compensation

To select the line drop compensation, proceed as follows:

► > Control parameter > Compensation method.

ð Compensation method.

ð Press or until the LDC option is displayed.

1. Press .

2. The line drop compensation is selected.

The following sections describe how you can set the parameters for the
ohmic and inductive voltage drop.

7.6.1.1

Setting the ohmic voltage drop Ur

You can use this parameter to set the ohmic voltage drop.

If you do not want to use line drop compensation, you have to set the value

0.0 V.

To set the ohmic voltage drop Ur, proceed as follows:
ü Select the LDC compensation method.

1. > Parameter > Compensation > Press until the de­sired parameter is displayed.

ð Ur line drop compensation.

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The ohmic voltage drop Ur is set.

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7 Functions and settings

7.6.1.2

Setting the inductive voltage drop Ux

You can use this parameter to set the inductive voltage drop. The compen­sation effect can be rotated by 180° in the display using a plus or minus sign.

If you do not want to use line drop compensation, you have to set the value

0.0 V.

To set the inductive voltage drop Ux, proceed as follows:
ü Select the LDC compensation method.

1. > Parameter > Compensation > Press until the de­sired parameter is displayed.

ð Ux line drop compensation.

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The inductive voltage drop Ux is set.

7.6.2

Z compensation

To keep the voltage constant for the consumer, you can use Z compensation
to activate a current-dependent increase in voltage. Z compensation is not
dependent on the phase angle φ and should only be used for small changes
in phase angle.

You can also define a limit value to avoid excess voltage on the transformer.

Figure 52: Z compensation

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7 Functions and settings

To use Z compensation, you need to calculate the increase in voltage (ΔU)
taking the current into account. Use the following formula for this purpose:

∆U Voltage increase I Load current in A
UTrTransformer voltage with

current I

INNominal current of current

transformer connection in A
(1 A; 5 A )

U

Voltage on line end with

Load

kCTCurrent transformer ratio
current I and on-load tap­changer in same operating
position

Sample calculation: UTr = 100.1 V, U

= 100.0 V, IN = 5 A kCT = 200 A/5 A,

Load

I = 100 A
Produces a voltage increase ∆U of 0.2%

The following sections describe how you can set the parameters you need
for Z compensation.

Select Z compensation

To select the line drop compensation, proceed as follows:

► > Control parameter > Compensation method.

ð Compensation method.

ð Press or until the Z option is displayed.

1. Press .

2. The Z compensation is selected.

The following sections describe how you can set the required parameters for
Z compensation.

7.6.2.1

Setting Z compensation

This parameter sets the voltage increase ∆V previously calculated.

If you do not want to use Z compensation, you have to set the value 0.0 %.

To set the current dependent voltage increase, proceed as follows:

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7 Functions and settings

ü Select Z compensation.

1. > Parameter > Compensation > Press until the de­sired parameter is displayed.

ð Z compensation.

2. Press to increase the value or to reduce it.

3. Press .

ð The current-dependent voltage increase is set.

7.6.2.2

Setting the Z compensation limit value

You can use this parameter to define the maximum permissible voltage in­crease to avoid excess voltage on the transformer.

If you do not want to use a limit value, you have to set the value 0.0 %.

To set the limit value for the current-dependent voltage increase, proceed as
follows:

ü Select Z compensation.
ü Set the "Z compensation" parameter

1. > Parameter > Compensation > Press until the de­sired parameter is displayed.

ð Z comp. limit value.

2. Press to increase the value or to reduce it.

3. Press .

ð The limit value is set.

Transformer data

7.7

The transformation ratios and measuring set-up for the voltage and current
transformers used can be set with the following parameters. The device
uses this information to calculate the corresponding measured values on the
primary side of the current transformer (and therefore the transformer) from
the recorded measured values. These are then displayed.

The following parameters are available for this purpose:
▪ Primary voltage
▪ Secondary voltage
▪ Primary current
▪ Secondary current (current transformer connection)
▪ Transformer circuit

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The measured values displayed for the device are influenced by the settings
for the above parameters. Note the table below.

Parameter set Measured value display

Primary

voltage

Secon-

dary

voltage

Primary

current

Trans­former

connec-

Voltage (main

screen)

tion

- Yes - - Secondary volt­age [V]

Yes Yes - - Primary voltage

Yes Yes Yes - Primary voltage

Yes Yes - Yes Primary voltage

Yes Yes Yes Yes Primary voltage

Table 16: Influence of transformer data on measured value display

[kV]

[kV]

[kV]

[kV]

7 Functions and settings

Current

(main screen)

- Secondary cur-

- Secondary cur-

Primary cur-

rent [A]

- Secondary cur-

Primary cur-

rent [A]

Current (info

screen)

rent [% of con-

nection]

rent [% of con-

nection]

Secondary cur-

rent [% of con-

nection]

rent [A]

Secondary cur-

rent [A]

7.7.1

Setting the primary transformer voltage

This parameter can be used to set the primary transformer voltage in kV.
When you are setting the primary transformer voltage, the device shows the
primary voltage rather than the secondary voltage in the main screen and
you can also set the control parameters in kV.

If a setting of 0 kV is chosen, no primary transformer voltage is displayed.

To set the primary transformer voltage, proceed as follows:

1. > Configuration > Transformer data.
ð Primary voltage.

2. Press to highlight the decimal place.
ð The decimal place is defined and the value can be changed.

3. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

4. Press to increase the value or to reduce it.

5. Press .

ð The primary transformer voltage is set.

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7.7.2

7.7.3

Setting the secondary transformer voltage

This parameter can be used to set the secondary transformer voltage in V.

To set the secondary transformer voltage, proceed as follows:

1. > Configuration > Transformer data > Press until the
desired parameter is displayed.

ð Secondary voltage.

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The secondary transformer voltage is set.

Setting primary transformer current

This parameter can be used to set the primary transformer current.
▪ When you are setting the primary transformer current, the measured

value is displayed in the main screen.

▪ If you set a value of 0, no measured value is displayed in the main

screen.

Setting parameter Current feed Display

Primary current Secondary cur-

rent

No parameteriza­tion

No parameteriza­tion

50 A Unknown 1 A 100 % (of primary

50 A 1 A 1 A 1 A (of secondary

Table 17: Example of unit displayed: %/A

Unknown 1 A 100 % 0 A

1 A 1 A 1 A 0 A

To set the primary transformer current, proceed as follows:

Power connection Info screen

Primary/secon-

dary current

current)

current)

Main screen

50 A (of primary
current)

50 A (of primary
current)

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7 Functions and settings

1. > Configuration > Transformer data > Press until the
desired parameter is displayed.

ð Primary current.

2. Press to highlight the position.
ð The desired position is highlighted and the value can be changed.

3. Press to increase the value or to reduce it.

4. Press .

ð The primary transformer current is set.

7.7.4

7.7.5

Setting the current transformer connection

This parameter can be used to set the current transformer connection. This
setting is needed for the device to display the correct secondary current in
the info screen.

If you select the "Unknown" option, the percentage of current (with reference
to the current transformer connection used) is displayed in the info screen.

▪ 1 A
▪ 5 A

To set the current transformer connection, proceed as follows:

1. > Configuration > Transformer data > Press until the
desired parameter is displayed.

ð Current transformer connection.

2. Press or to select a current transformer connection.

3. Press .

ð The current transformer connection is set.

Setting the phase difference for the current transformer/voltage transformer

You can use this parameter to set the phase difference of the current trans­former and voltage transformer. You can set the common transformer cir­cuits as follows:

Setting Measurement meth-odPhase difference

0 1PH 1 phase 0°
0 3PHN 3 phase 0°
0 3PH 3 phase 0°
90 3PH 3 phase 90°
30 3PH 3 phase 30°

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7 Functions and settings

TAPCON® 230

TAPCON® 230

Setting Measurement meth-odPhase difference

-30 3PH 3 phase -30°

Table 18: Set values for transformer circuit

Note the following sample circuits to select the correct transformer circuit.

Circuit A: 1-phase measurement in 1-phase grid

Figure 54: Phase difference 0 1PH

▪ The voltage transformer VT is connected to the outer conductor and

neutral conductor.
▪ The current transformer CT is looped into the outer conductor.
▪ The voltage VL1 and current I

are in phase.

L1

▪ The voltage drop on an outer conductor is determined by the current IL1.

Circuit B: 1-phase measurement in 3-phase grid

Figure 55: Phase difference 0 3PHN

▪ The voltage transformer VT is connected to the outer conductors L1 and

the neutral conductor.
▪ The current transformer CT is looped into the outer conductor L1.
▪ The voltage V and current I are in phase.
▪ The voltage drop on an outer conductor is determined by the current IL1.

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7 Functions and settings

TAPCON® 230

TAPCON® 230

Circuit C:

Figure 56: Phase difference 0 3PHN

▪ The voltage transformer VT is connected to the outer conductors L1 and

L2.

▪ The current transformer CT1 is looped into the outer conductor L1 and

CT2 into the outer conductor L2.

▪ The current transformers CT1 and CT2 are connected crosswise in par-

allel (total current = IL1 + IL2).
▪ The total current IL1 + IL2 and voltage VL1-VL2 are in phase.
▪ The voltage drop on an outer conductor is determined by the current:

(IL1 + IL2) / √3.

Circuit D

Figure 57: Phase difference 90 3PH

▪ The voltage transformer VT is connected to the outer conductors L1 and

L2.
▪ The current transformer CT is looped into the outer conductor L3.
▪ The current IL3 is ahead of voltage VL1-VL2 by 90°.
▪ The voltage drop on an outer conductor is determined by the current IL3.

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7 Functions and settings

TAPCON® 230

TAPCON® 230

Circuit E

Figure 58: Phase difference 30 3PH

▪ The voltage transformer VT is connected to the outer conductors L1 and

L2.
▪ The current transformer CT is looped into the outer conductor L2.
▪ The current IL2 is ahead of voltage VL2-VL1 by 30°.
▪ The voltage drop on an outer conductor is determined by the current IL2.

Circuit F

Figure 59: Phase difference -30 3PH

▪ The voltage transformer VT is connected to the outer conductors L1 and

L2.
▪ The current transformer CT is looped into the outer conductor L1.
▪ The current IL1 lags behind VL1-VL2 by 30°. This corresponds to a phase

shift of -30°.
▪ The voltage drop on an outer conductor is determined by the current IL1.

To set the phase difference for the transformer circuit, proceed as follows:

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7 Functions and settings

1. > Configuration > Transformer data > Press until the
desired parameter is displayed.

ð Transformer circuit.

2. Press or to select the required phase difference.

3. Press .

ð The phase difference is set.

Parallel operation

7.8

In theParallel operation menu item, you can set the parameters needed for
parallel transformer operation. Parallel transformer operation is used to in­crease the throughput capacity or short-circuit capacity in one place.

Conditions for parallel

operation

Compliance with the following general conditions is required for operating
transformers in parallel:

▪ Identical rated voltage
▪ Transformer power ratio (< 3 : 1)
▪ Maximum deviation of short-circuit voltages (UK) for transformers con-

nected in parallel < 10 %

▪ Same number of switching groups

You can control up to 16 transformers connected in parallel in one or 2
groups without detecting the system topology. Information is swapped be­tween the voltage regulators operating in parallel using the CAN bus. Paral­lel operation is activated using one of 2 status inputs or the control system.

Parallel control can take one of two forms:
▪ Parallel operation following the "Circulating reactive current minimiza-

tion" principle

▪ Parallel operation following the "Tap synchronization" (master/follower)

principle

The following sections describe how you can set the parameters. When acti­vating parallel operation, make sure you have configured the following pa­rameters:

▪ CAN bus address
▪ Assigning a parallel operation group

7.8.1

Assigning CAN bus address

You can use this parameter to assign a CAN bus address to the device. So
that all devices can communicate using the CAN bus, each device requires a
unique identifier. Addresses can be set from 1 to 16. If the value is set to 0,
then no communication takes place.

To enter the CAN bus address, proceed as follows:

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7 Functions and settings

1. > Configuration > Parallel operation > Press until the
desired parameter is displayed.

ð CAN address.

2. Press to increase the value or to reduce it.

3. Press .

ð The CAN bus address is saved.

7.8.2

7.8.2.1

Selecting parallel operation method

You can use this parameter to select a parallel operation method. Two differ­ent methods can be assigned to the device.

▪ Circulating reactive current minimization
▪ Tap synchronization (master/follower)

You must select the same parallel operation method for all voltage regula­tors operating in parallel.

The following sections describe how you can set the parameters for a paral­lel operation method.

Setting circulating reactive current method

When the circulating reactive current parallel operation method is select­ed, then parallel operation is carried out using the circulating reactive current
minimization method. The circulating reactive current is calculated from the
transformer currents and their phase angles. A voltage proportional to the
circulating reactive current is added to the independently operating voltage
regulators as a correction for the measurement voltage. This voltage correc­tion can be reduced or increased using the circulating reactive current sensi­tivity setting.

The circulating reactive current method is suited to transformers connected
in parallel with a similar nominal output and short-circuit voltage VK and to
vector groups with the same and different step voltages. This does not re­quire any information about the tap position.

To set the circulating reactive current parallel operation method, proceed
as follows:

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7 Functions and settings

1. > Configuration > Parallel operation.
ð Parallel operation method.

2. Press or until circulating reactive current appears in the dis­play.

3. Press .

ð The parallel operation method is set.

When using the circulating reactive current parallel operation method, you
have to set the parameters for the circulating reactive current sensitivity
and circulating reactive current blocking.

Setting circulating reactive current sensitivity

The circulating reactive current sensitivity is a measure of its effect on the
behavior of the voltage regulator. At a setting of 0 % no effect is present.
With circulating reactive current relating to the rated current of the current
transformer, if you set the value to 10 % for example, this would cause the
voltage in the voltage regulator to be corrected by 10 %. This correction to
the voltage can be increased or decreased with this setting to attain the opti­mum value.

As soon as you change the circulating reactive current sensitivity value, the
value for the result changes in the help text in the display.

To set the circulating reactive current sensitivity, proceed as follows:

1. > Configuration > Parallel operation > Press until the
desired parameter is displayed.

ð Circulating reactive current sensitivity.

2. Press to increase the value or to reduce it.

3. If necessary, press to highlight the decimal place.
ð The decimal place is now highlighted and the value can be

changed.

4. Press .

ð The circulating reactive current sensitivity is set.

Setting circulating reactive current blocking

You can use this parameter to set the limit value for the maximum permissi­ble circulating reactive current. If, during parallel operation, the circulating re­active current exceeds the set limit value, then the following event is activat­ed:

▪ Parallel operation error

All devices operating in parallel are blocked. Depending on the set delay
time for the parallel operation error message, the signaling relay Parallel op­eration error is activated.

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