Bender RCM420 User Manual

Manual

EN

RCM420

Residual current monitor

for AC current monitoring in TN and TT systems
Software version: D240 V1.2x

RCM420_D00057_02_M_ XXEN/06.2016

Bender GmbH & Co. KG

P.O. Box 1161 • 35301 Gruenberg • Germany
Londorfer Strasse 65 • 35305 Gruenberg • Germany
Tel.: [phone] • Fax: [phone]
E-Mail: [e-mail] • www.bender.de

© Bender GmbH & Co. KG

All rights reserved.
Reprinting only with permission of the publisher.

Subject to change!

Photos: Bender archives

Table of Contents

1. Important information .................................................................................... 7

1.1 How to use this manual ................................................................................. 7

1.2 Technical support: service and support ................................................... 8

1.2.1 First level support ............................................................................................. 8

1.2.2 Repair service ..................................................................................................... 8

1.2.3 Field service ........................................................................................................ 9

1.3 Training courses ............................................................................................. 10

1.4 Delivery conditions ....................................................................................... 10

1.5 Inspection, transport and storage ........................................................... 10

1.6 Warranty and liability ................................................................................... 11

1.7 Disposal ............................................................................................................ 12

2. Safety instructions ......................................................................................... 13

2.1 General safety instructions ........................................................................ 13

2.2 Work activities on electrical installations ............................................. 13

2.3 Intended use ................................................................................................... 14

3. Function ........................................................................................................... 15

3.1 Device features .............................................................................................. 15

3.2 Function ............................................................................................................ 15

3.2.1 Connection monitoring .............................................................................. 16

3.2.2 Additional cascaded measuring current transformer ...................... 16

3.2.3 Fast response value query ......................................................................... 16

3.2.4 Automatic self test ........................................................................................ 16

3.2.5 Manual self test .............................................................................................. 16

3.2.6 Functional faults ............................................................................................ 17

3.2.7 Set the number of reload cycles .............................................................. 17

3.2.8 Assigning alarm categories to alarm relays K1/K2 ............................ 17

3.2.9 Time delays t, ton and toff ....................................................................... 17

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Table of Contents

3.2.10 Residual current monitoring in window discriminator mode ...... 18

3.2.11 Password protection (on, OFF) ................................................................. 18

3.2.12 Factory setting FAC ...................................................................................... 18

3.2.13 Erasable history memory ............................................................................ 18

3.2.14 External, combined test respectively reset button T/R ................... 18

3.2.15 Fault memory .................................................................................................. 18

4. Installation and connection ......................................................................... 19

5. Operation and setting .................................................................................. 23

5.1 Display elements ........................................................................................... 23

5.2 Function of the operating elements ...................................................... 24

5.3 Menu structure ............................................................................................... 25

5.4 Display in standard mode .......................................................................... 26

5.5 Display in menu mode ................................................................................ 27

5.5.1 Parameter query and setting: Overview ............................................... 27

5.5.2 Changeover from overcurrent to undercurrent mode or to window

mode .................................................................................................................. 29

5.5.3 Response value setting for overcurrent: ............................................... 30

5.5.4 Setting the fault memory and alarm relay operating mode .......... 30

5.5.5 Assigning alarm categories to the alarm relays ................................. 31

5.5.6 Set the time delays ....................................................................................... 33

5.5.7 Changing from overcurrent operation to window operation ...... 34

5.5.8 Setting the correction factor for an additional cascaded current

transformer ...................................................................................................... 34

5.5.9 Factory setting and password protection ............................................ 35

5.5.10 Re-establishing the factory settings ....................................................... 36

5.5.11 Device information query .......................................................................... 37

5.5.12 History memory query ................................................................................. 37

5.6 Commissioning .............................................................................................. 37

5.7 Factory setting ............................................................................................... 37

5.8 Error codes ....................................................................................................... 38

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Table of Contents

6. Technical data ................................................................................................ 39

6.1 Data in tabular form ..................................................................................... 39

6.2 Standards, approvals and certifications ................................................ 42

6.3 Ordering information ................................................................................... 43

INDEX .................................................................................................................... 45

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RCM420_D00057_02_M_ XXEN/06.2016

1. Important information

1.1 How to use this manual

This manual is intended for qualified personnel working in
electrical engineering and electronics!

Always keep this manual within easy reach for future reference.

To make it easier for you to understand and revisit certain sections in this man­ual, we have used symbols to identify important instructions and information.
The meaning of these symbols is explained below:

This signal word indicates that there is a high risk of danger
that will result in electrocution or serious injury if not
avoided.

This signal word indicates a medium risk of danger that
can lead to death or serious injury if not avoided.

This signal word indicates a low level risk that can result in
minor or moderate injury or damage to property if not
avoided.

This symbol denotes information intended to assist the user
in making optimum use of the product.

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Important information

This manual has been compiled with great care. It might nevertheless contain
errors and mistakes. Bender cannot accept any liability for injury to persons or
damage to property resulting from errors or mistakes in this manual.

1.2 Technical support: service and support

For commissioning and troubleshooting Bender offers you:

1.2.1 First level support

Technical support by phone or e-mail for all Bender products

 Questions concerning specific customer applications
 Commissioning
 Troubleshooting

Telephone: [phone]*
Fax: [phone]

In Germany only: 0700BenderHelp (Tel. and Fax)
E-mail: [e-mail]

1.2.2 Repair service

Repair, calibration, update and replacement service for Bender products

 Repairing, calibrating, testing and analysing Bender products
 Hardware and software update for Bender devices
 Delivery of replacement devices in the event of faulty or incorrectly

delivered Bender devices

 Extended guarantee for Bender devices, which includes an in-house

repair service or replacement devices at no extra cost

Telephone: [phone]** (technical issues)

Fax: [phone]
E-mail: [e-mail]

Please send the devices for repair to the following address:

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[phone]**, -785** (sales)

RCM420_D00057_02_M_ XXEN/06.2016

Important information

Bender GmbH, Repair-Service,
Londorfer Str. 65,
35305 Grünberg

1.2.3 Field service

On-site service for all Bender products

 Commissioning, configuring, maintenance, troubleshooting of Bender

products

 Analysis of the electrical installation in the building (power quality test,

EMC test, thermography)

 Training courses for customers

Telephone: [phone]**, -762 **(technical issues)

[phone]** (sales)

Fax: [phone]
E-mail: [e-mail]
Internet: www.bender-de.com

*Available from 7.00 a.m. to 8.00 p.m. 365 days a year (CET/UTC+1)
**Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m

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Important information

1.3 Training courses

Bender is happy to provide training regarding the use of test equipment.
The dates of training courses and workshops can be found on the Internet at
www.bender-de.com -> Know-how -> Seminars.

1.4 Delivery conditions

Bender sale and delivery conditions apply.
For software products the "Softwareklausel zur Überlassung von Standard­Software als Teil von Lieferungen, Ergänzung und Änderung der Allgemeinen
Lieferbedingungen für Erzeugnisse und Leistungen der Elektroindustrie"
(software clause in respect of the licensing of standard software as part of de­liveries, modifications and changes to general delivery conditions for prod­ucts and services in the electrical industry) set out by the ZVEI (Zentralverband
Elektrotechnik- und Elektronikindustrie e. V.) (German Electrical and Electron­ic Manufacturer's Association) also applies.
Sale and delivery conditions can be obtained from Bender in printed or elec­tronic format.

1.5 Inspection, transport and storage

Inspect the dispatch and equipment packaging for damage, and compare the
contents of the package with the delivery documents. In the event of damage
in transit, please contact Bender immediately.
The devices must only be stored in areas where they are protected from dust,
damp, and spray and dripping water, and in which the specified storage tem­peratures can be ensured.

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RCM420_D00057_02_M_ XXEN/06.2016

Important information

1.6 Warranty and liability

Warranty and liability claims in the event of injury to persons or damage to
property are excluded if they can be attributed to one or more of the follow­ing causes:

 Improper use of the device.
 Incorrect mounting, commissioning, operation and maintenance of the

device.

 Failure to observe the instructions in this operating manual regarding

transport, commissioning, operation and maintenance of the device.

 Unauthorised changes to the device made by parties other than the

manufacturer.

 Non-observance of technical data.
 Repairs carried out incorrectly and the use of replacement parts or

accessories not approved by the manufacturer.

 Catastrophes caused by external influences and force majeure.
 Mounting and installation with device combinations not recom-

mended by the manufacturer.

This operating manual, especially the safety instructions,
must be observed by all personnel working on the device. Furthermore,
the rules and regulations that apply for accident prevention at the place of use
must be observed.

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Important information

1.7 Disposal

Abide by the national regulations and laws governing the disposal of this de­vice. Ask your supplier if you are not sure how to dispose of the old equip­ment.
The directive on waste electrical and electronic equipment (WEEE directive)
and the directive on the restriction of certain hazardous substances in electri­cal and electronic equipment (RoHS directive) apply in the European Commu­nity. In Germany, these policies are implemented through the "Electrical and
Electronic Equipment Act" (ElektroG). According to this, the following applies:

 Electrical and electronic equipment are not part of household waste.
 Batteries and accumulators are not part of household waste and must

be disposed of in accordance with the regulations.

 Old electrical and electronic equipment from users other than private

households which was introduced to the market after 13 August 2005
must be taken back by the manufacturer and disposed of properly.

For more information on the disposal of Bender devices, refer to our
homepage at www.bender-de.com -> Service & support.

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RCM420_D00057_02_M_ XXEN/06.2016

2. Safety instructions

2.1 General safety instructions

Part of the device documentation in addition to this manual is the enclosed
"Safety instructions for Bender products".

2.2 Work activities on electrical installations

Only qualified personnel are permitted to carry out the
work necessary to install, commission and run a device or
system.

Risk of electrocution due to electric shock!

Touching live parts of the system carries the risk of:

 An electric shock
 Damage to the electrical installation
 Destruction of the device

Before installing and connecting the device, make sure

that the installation has been de-energised. Observe the
rules for working on electrical installations.

If the device is used outside the Federal Republic of Germany, the applicable
local standards and regulations must be complied with. The European stand­ard EN 50110 can be used as a guide.

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Safety instructions

2.3 Intended use

The AC and pulsed DC sensitive residual current monitor RCM420 (Type A)
from Bender is designed for fault and residual current monitoring in earthed
power supply systems (TN/TT systems) where an alarm is to be activated in the
event of a fault, but disconnection must be prevented. In addition, the device
can be used to monitor single conductors, such as PE conductors, N-PE con­nections and PE-PAS connections.
Two separately adjustable response ranges I
between prewarning and alarm (I

I

).

Δn2

= 50…100 % of the set response value

Δn1

Δn1

and I

allow to distinguish

Δn2

In order to meet the requirements of the applicable standards, customised pa­rameter settings must be made on the equipment in order to adapt it to local
equipment and operating conditions. Please heed the limits of the range of
application indicated in the technical data.

Any use other than that described in this manual is regarded as improper.

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RCM420_D00057_02_M_ XXEN/06.2016

3. Function

3.1 Device features

 AC and pulsed DC sensitive residual current monitor Type A according

to IEC 62020

 Adjustable switching hysteresis
 r.m.s. value measurement
 Starting delay, response delay and delay on release
 Measured value display via multi-functional LC display
 Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2)
 N/C operation or N/O operation selectable
 Password protection against unauthorized parameter changing
 Fault memory function can be switched off
 CT connection monitoring

3.2 Function

Once the supply voltage Us is applied, the starting delay "t" is activated. Mea­sured values exceeded during this time do not influence the switching state
of the alarm relays. Residual current monitoring takes place via an external
measuring current transformer. The currently measured value is shown on the
LC display. In this way any changes can be recognized easily, for example,
when circuits are connected to the system. If the measured value exceeds one
or both response values, the response delay t
piry of the response delay t

on1/2,

the selected alarm relay switches and the

on1/2

alarm LEDs light. If the release value is not reached before the expiry of t
alarm will be signalled: the LEDs AL1, AL2 do not light and the alarm relays do
not switch. The set release time t

begins when the measured value again

off

falls below the release value (response value plus hysteresis) after the swit­ching of the alarm relays. After the expiry of t

off,

to their initial position. With the fault memory activated, the alarm relays do

starts running. After the ex-

, no

on

the alarm relays switch back

not change their actual state until the reset button R is pressed. The device

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