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PQC
Operating Manual
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frako PQC Operating Manual

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OPERATING MANUAL
PQC
Power Quality Controller
The controller that maximizes reliability and monitors power quality
FRAKO Kondensatoren- und Anlagenbau www.frako.com
Contents
1 About this manual �������������������������������������������������������������������������������������4
1.1 Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Safekeeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Symbols used in this manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Safety ���������������������������������������������������������������������������������������������������������6
2.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Instrument-specific dangers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Management information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.5 Relevant standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.6 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Technical data �������������������������������������������������������������������������������������������9
4 Instrument description ���������������������������������������������������������������������������15
4.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Instrument versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 Password protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Installation �����������������������������������������������������������������������������������������������18
5.1 Mounting at the desired location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.1 Preparing for installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.2 Scope of supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.3 Suitable location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1.4 Mounting the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Electrical installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.1 Electrical installation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2.2 Completing the electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2.3 Specifications for the electrical connections . . . . . . . . . . . . . . . . . . . 22
5.2.4 Earth connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2.5 Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2.6 Voltage measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.7 Current measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2.8 Output relays (control outputs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2.9 Alarm function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.2.10 Connection diagrams for all PQC types. . . . . . . . . . . . . . . . . . . . . . . 25
5.3 Commissioning (initial start-up) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.3.1 Preparations for start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.3.2 PQC initial start-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.3.3 Automatic connection and stage identification. . . . . . . . . . . . . . . . . . 31
5.3.4 Manual connection and stage identification . . . . . . . . . . . . . . . . . . . . 32
2 |
6 Description of the menu ������������������������������������������������������������������������� 35
6.1 Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.2 Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.2.1 PQC overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.2.2 System & PQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.2.3 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.2.4 Alarms & notifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.3 Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.3.1 System parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.3.2 PFC Equip. parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.3.3 Control parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.3.4 Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.3.5 Communication (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
6.3.6 Temperature I/O (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
6.3.7 Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6.4 About PQC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6.5 Factory settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6.6 Service interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
7 General operation �����������������������������������������������������������������������������������71
8 Cleaning and maintenance���������������������������������������������������������������������72
8.1 Safety during cleaning and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
8.3 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
9 Troubleshooting��������������������������������������������������������������������������������������� 73
10 Decommissioning and removal, storage and disposal �����������������������77
10.1 Decommissioning the PQC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
10.2 PQC removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
10.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
10.4 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
| 3

1 About this manual

The PQC Power Quality Controller is an instrument for controlling the power factor and other power quality parameters. Throughout this manual, it will be referred to simply as the PQC.
The current version of this manual can be accessed at our website: www.frako.com.

1.1 Objective

This operating manual has been prepared for persons who install, connect, commis­sion and operate the PQC. The manual must be read through carefully and completely before any work on or with the instrument is carried out. All actions taken must be in accordance with this manual.

1.2 Safekeeping

This operating manual contains important instructions for operating the PQC safely, correctly and cost-effectively. It is to be considered part of the instrument itself and must be held in a secure place where it can be referred to at all times.

1.3 Symbols used in this manual

Special instructions in this operating manual are marked by symbols and separated from the other text by lines.
Warning signs
In order to avoid accidents, death or injury and damage to assets, these instructions must always be followed. The warning signs consist of the appropriate key word – DANGER, WARNING, CAUTION or ATTENTION – plus a yellow symbol on the left­hand side, as shown below:
WARNING! Type of danger!
Description of the danger and possible consequences
– Actions to avoid the danger
4 | About this manual
The symbols and key words classify the extent of the danger:
Symbol Key word Meaning
DANGER
WARNING
CAUTION
ATTENTION Damage to property could occur if this sign is not heeded.
This key word indicates a hazard with a high level of risk that if not avoided can result in death or serious injury.
This key word indicates a hazard with an intermediate level of risk that if not avoided can result in death or serious injury.
This key word indicates a hazard with a low level of risk that if not avoided can result in slight or moderate injury.
Notes
Notes supplement the general text with additional information on the correct func­tioning and fault-free operation of the PQC. They are marked with the white-on-blue symbol on the left-hand side, as shown below:
Note
Example of a note

1.4 Reference documents

For further information on the PQC please refer to the following documents:
– “PQC Application Note” – “Modbus Specification” – “Application Note” – “REST Application Note”
About this manual | 5

2 Safety

2.1 Intended use

Within the scope of the technical data (see Section 3 “Technical data”), the PQC Power Quality Controller is intended for the control of power factor cos φ by switching reactive power in and out. Any use of the instrument that deviates from its intended use must be expressly approved by the manufacturer.
2.2 Instrument-specic dangers
The PQC has been manufactured using state-of-the-art technology. Nevertheless, not all potential dangers can be excluded.
Failure to observe the safety instructions can result in death, serious injury or severe damage to equipment and other assets.
Danger from electricity
The PQC operates at the supply voltage. Touching live components at the instrument terminals and connecting cables can cause serious injury or may even be life-threat­ening.
– Installation, commissioning and decommissioning of the PQC may only be carried
out by appropriately qualified technicians who are also familiar with and under­stand the contents of this manual.
– When the PQC is being installed or serviced, the instrument and the electrical
system must be isolated from the power supply.
– The isolated electrical system must be locked out and tagged to prevent its being
inadvertently switched on again. – It must be verified that none of the terminals are live! – All live components in the vicinity must be covered to prevent inadvertent contact. – Current transformer circuits must be short-circuited before they are interrupted. – Only approved installation cables must be used. – The PQC must only be employed on duties up to the specified maximum power.
Overloading the instrument can result in its destruction, create a fire hazard or
cause an electrical accident. The load ratings for the various connections must
not be exceeded. – Do not open the PQC. – When the PQC is in operation, the USB port must not be touched.
6 | Safety
Danger from heat
The instrument terminals can become hot during operation.
– After the PQC has been operating, sufficient time must be allowed for the PQC
and its terminals to cool down before work is carried out on the connections.

2.3 Management information

Personnel qualifications
The following qualifications are required for personnel working with the PQC:
– Installing, commissioning, troubleshooting (installation):
electrician
– Operation, troubleshooting (faulty configuration):
persons who have read and understood the operating manual.
– Troubleshooting (instrument faults):
FRAKO Service + Support
User responsibility
In commercial operations in Germany, it is essential to comply with the regulations of the Social Accident Insurance Institution covering electrical installations. In other countries, the equivalent local regulations must be followed.
The safety of the system in which the PQC is incorporated is the responsibility of the persons installing and operating the system.
For safety reasons and to retain conformity with product approval requirements (CE marking), the user is not permitted to convert or otherwise modify the PQC.
The user must ensure that all operators are familiarized with this operating manual and follow it at all times.

2.4 Disclaimer

No claims under guarantee shall be valid in the event of damages caused by failure to observe the instructions in this operating manual. We shall not be held liable for consequential damages!
Incorrect operation or failure to observe the safety instructions will invalidate all claims under the guarantee, and no liability is accepted for any injuries to persons or dam­ages to assets arising therefrom or occasioned thereby!
Safety | 7

2.5 Relevant standards

Installation and commissioning of the instrument in industrial plant must be carried out in strict compliance with the following standards:
– EN 61508-1:2011-02; VDE 0803-1:2011-02
Any other laws, standards, regulations and safety rules (IEC, EN, VDE, etc.) relevant to this product and the protection of persons and assets must be observed. In Germany, it is essential to comply with the Equipment Safety Act (GSG) and the regulations of the German Social Accident Insurance Institutions. In other countries, the equivalent local regulations must be followed.

2.6 Repair

Should repair work be necessary, the customer or user must contact the manufacturer of the PQC: FRAKO Kondensatoren und Anlagenbau GmbH, Tscheulinstrasse 21A, D-79331 Teningen, Germany, www.frako.com.
8 | Safety

3 Technical data

Power supply:
Type xxx240x-xx xxx480x-xx
85–267 V AC (absolute limits),
Supply voltage
Power draw maximum 5 VA
Overcurrent protection
frequency 45–65 Hz,
or 100–377 V DC (absolute limits)
External, maximum 2 A (time delay) specified
Inputs:
Category Single phase 3-phase
Type xxxxxx1-xx xxxxx3-xx
80 V AC – maximum 760 V AC (phase–phase, absolute limits), suit-
able for 115–690 V AC networks, electrically interconnected via high
Voltage path measurement inputs
Current path measurement inputs
Digital inputs Up to five digital inputs
Temperature inputs
resistances, measurement of medium voltages possible using an x/100
V transformer;
In areas where UL / CSA standards apply (versions PQC xxx480x-xx):
networks with nominal voltages 115–600 V AC;
power failure detection after duration of a half-wave
x/5 A AC or x/1 A AC (transformer secondary current ≥ 15 mA), electri-
cally isolated, power draw maximum 1 VA per transformer connection,
continuous overload rating up to 6 A AC, transient overload maximum
10A AC for 10 seconds
5-24 V DC inputs, alternatively usa-
ble as up to 5 x 24 V DC, 100mA
outputs, electrically interconnected
with each other and the tempera-
ture input
1 x PT-100 or PT-1000 RTD, 4-wire
or 2-wire configuration, automatic
probe type identification;
2 x NTC thermistor type TDK/
Epcos-B57861S0502F040,
FRAKO Article No. 29-20094,
measuring range –50 °C to
+200 °C, electrically connected with
the digital outputs
85–530 V AC (absolute limits),
frequency 45–65 Hz,
or 100–750 V DC (absolute limits)
Technical data | 9
Category Single phase 3-phase
Type xxxxxx1-xx xxxxx3-xx
Type xxxxxx-4x
Prole switching (T)
common earth with FRAKO Starkstrombus (Frakobus)
S0 pulse as per DIN 43864,
Interfaces:
Type xxxxxx-2x xxxxxx-3x xxxxxx-4x
Modbus RTU interface
Ethernet interface (Modbus TCP, web server)
FRAKO Starkstrombus (Frakobus)
120 Ω terminating resistor required at the end of the bus system
100 Mbit/s
Ethernet standard
100BASE-T
RS-485, surge
impedance 120 Ω, for connection to the FRAKO Energy Man-
agement System
Outputs:
Category 12 output relays 6 output relays 6 output relays
Type 120xxxx-xx 060xxxx-xx 061xxxx-xx
AC-14 440 V AC,
max. 3 A
or DC-13 125 V DC,
max. 3 A, mechanical
service life
1 × 107 cycles, electri-
cal service life AC-14
at 3 A:1 × 105 cycles,
AC - 14
at 0.5 A: 2 × 106
cycles
Output relays (outputs for switching stages)
NO contact with common pole P;
AC - 14 250 V AC, maximum 3 A
or DC - 13 30 V DC, maximum 3 A,
mechanical service life 2 × 107 cycles,
electrical service life AC - 14 at 3 A:
1 × 105 cycles,
AC - 14 at 0.5 A: 2 × 106 cycles
Common supply conductor P to the output relays maximum 10 A;
Note: utilization category AC-14/DC-13 as per IEC 60947-5-1; for all
PQC types in areas where UL / CSA standards apply: 3 A 250 V AC
cosφ = 1 at 85 °C, 3 A 30 V DC L/R = 0 ms at 85 °C
10 | Technical data
Category 12 output relays 6 output relays 6 output relays
Type 120xxxx-xx 060xxxx-xx 061xxxx-xx
Volt-free NO contact, AC-14 250 V AC, max. 3 A or DC-13 30 V DC, max. 3 A, mechanical service life 2 × 107 cycles, electrical service life
Alarm contact
Type xxxxxxx-x1
Digital outputs
AC-14 at 3 A 1.5 × 105 cycles, AC-14 at 0.5 A 2 × 106 cycles.
Note: utilization category AC-14/DC-13 as per IEC 60947-5-1,
in areas where UL / CSA standards apply: 3 A 250 V AC
cosφ = 1 at 85 °C, 3 A 30 V DC L/R = 0 ms at 85 °C
Up to 5 digital outputs 24 V DC, 100 mA, electrically interconnected
with each other and the temperature input. Alternatively usable as up to
5×5–24V DC digital inputs. Note: This internal interconnection gives rise to a minimum current of about 1 µA at the outputs. In the case of
a relay with low power LEDs, for example, a weak glow may therefore
result.
Connections: Via pluggable screw terminals
Type xxx240x-xx xxx480x-xx
Instrument power AUX, Insulation rating
Protective earth PE
Voltage measurement inputs L1, L2, L3, N
Current measurement inputs L1, L2, L3, terminals S1 and S2 in each case
Type xx0xxxx-xx xx1xxxx-xx
Output relays (outputs for switching stages)
Alarm contact
Example 1: for 230 V AC, select at least 250 V AC, 70 °C; Example 2: for
Conductor cross section max. 2.5 mm², min. 0.2 mm²
min. 250 V AC, 70 °C 500 V AC, 70 °C
Via 6.3 mm female slide connector; conductor cross section at least equal to the largest conductor cross section of the AUX phases, the
voltage measurement connections, the output relays and the alarm
connections; insulation colour yellow/green
Conductor cross section max. 2.5 mm², min. 0.2 mm² Insulation rating;
690 V AC, select at least 750 V AC, 70 °C
Conductor cross section max. 2.5 mm², min. 0.2 mm² Insulation rating:
min. 250 V AC, 70 °C
Conductor cross section max. 2.5 mm², min. 0.2 mm²
250 V relay
Insulation rating:
min. 250 V AC, 70 °C
Conductor cross section max. 2.5 mm², min. 0.2 mm²
Insulation rating: min. 250 V AC, 70 °C
440 V relay
Insulation rating:
min. 500 V AC, 70 °C
Technical data | 11
USB for updates (service interface)
Type xxxxxxx-x1
Digital inputs and outputs
Temperature inputs
Type xxxxxxx-2x
Modbus RTU interface
Type xxxxxxx-3x
Ethernet interface Ethernet cable Cat 5 as per TIA-568A/B, S/FTP shielding, RJ45 plug
Type xxxxxxx-4x
FRAKO Starkstrombus (Frakobus)
Input for prole switching
Conductor cross section max. 1.5 mm², min. 0.14 mm²
Conductor cross section max. 1.5 mm², min. 0.14 mm²
Conductor cross section max. 1.5 mm², min. 0.14 mm²
Conductor cross section max. 1.5 mm², min. 0.14 mm²
Conductor cross section max. 1.5 mm², min. 0.14 mm²
USB Micro A and Micro B ports
Insulation rating: 50 V DC, 70 °C
Insulation rating: 50 V DC, 70 °C
Insulation rating: 50 V DC, 70 °C
Insulation rating: 50 V DC, 70 °C
Insulation rating: 50 V DC, 70 °C
Note
0.14 mm2 = AWG 26; 0.2 mm2 ≈ AWG 25;
1.4 mm² ≈ AWG 16; 2.5 mm² = AWG 14
Design data:
Dimensions (W x H x D)
Mounting
Weight approx. 770 g without packaging
Ingress protection
12 | Technical data
144 mm × 165 mm × 70 mm casing including connectors
Front of panel in 138 mm x 138 mm cutout to IEC 61554,
Front of instrument when mounted in cabinet IP40, when mounted in
cabinet with upgrade kit (Article No. 20-50015) IP54; rear of instrument
144 mm × 144 mm × 70 mm casing
held by four retaining lugs at the corners of the casing
Maximum screw tightening torque 0.4 Nm
and terminals IP20; all as per EN 60529
Pollution degree 2 as per EN 61010-1:2011-07.
Casing protection class I as per EN 61140
Working voltage up to max. 760 V AC absolute value
Electrical design
at voltage measurement inputs.
TNV1 circuits, some of which interconnected:
digital inputs and outputs, optional temperature inputs,
optional Modbus interface.
Casing design
Flammability rating UL 94 V-0 according to casing manufacturer
Impact resistance IK06 as per EN 61010-1:2011-07, 8.2.2
Service life At +25 °C ambient temperature 15 years
EMC as per EN 61326-1
EN 61000-4-2, electrostatic discharge: air 8 kV and contact 6 kV with
horizontal and vertical coupling plane
EN 61000-4-3, radiated immunity (EMS) 80 MHz – 1 GHz, horizontal and
vertical, level 10 V/m = industrial environment radiation, Class A
Hardware version V1.0:
EN 55022A EMI 30 MHz – 1 GHz = industrial environment, Class A
Being a Class A device, this version can cause radio interference in resi-
dential areas. In this case, users may be called upon to take appropriate
EMC
remedial measures at their own expense.
From hardware version V1.2:
EN 55022A EMI 30 MHz – 1 GHz = office and residential area, Class B
EN 61000-4-6, immunity to conducted disturbances, level 10 V RMS,
150 kHz – 80 MHz
1
PQC xxxxxxx-3x: EN 55022A EMI 30 MHz – 1 GHz = office and residential area, Class A EN 61000-4-4, burst immunity, 1 kV capacitive coupling, 2 kV injection
into power supply cable and voltage measurement inputs
EN 61000-4-5 surge immunity, 6 kV injection into power supply cable
and voltage measurement inputs
1 The standard radio-frequency field test as per EN 61000-4-6 (EMC immunity) calls for amplitude modu-
lation at a modulation frequency of 1 kHz. However, this frequency lies within the measurement range of the instrument in its intended use (20th harmonic of 50 Hz = 1 kHz). It is therefore to be expected that the measuring circuit clearly respond to the standard test. For this reason, the radio-frequency field test can only be carried out without amplitude modulation.
Technical data | 13
Ambient conditions:
Temperature range -25 °C to +65 °C, noncondensing
Installation altitude Maximum height above sea level 2000 m
Measuring system:
Accuracy
Averaging function Over 1 second, updated every 100 ms
Harmonics
Voltage and current measurement ±1% at 50/60 Hz and 25 °C ambient
temperature
Measured via Lx–N
All even and uneven harmonics up to the 19th
14 | Technical data

4 Instrument description

4.1 Function

The PQC Power Quality Controller continuously calculates the reactive and active power components in the supply network using the measurement data from the cur­rent path (current transformer) and the voltage path (voltage measurement connec­tion). If the reactive power component exceeds certain thresholds, which the PQC has determined during the calibration procedure or which have been set as described, switching commands are given via the instrument outputs. If the inductive reactive power is greater than the value preset during instrument configuration (target cosφ), after an adjustable time delay one or more of the PQC control contacts are closed. The PQC thus switches capacitor stages in as required in order to restore the target power factor. If the inductive reactive power component of the loads reduces again, this causes capacitor stages to be switched out. The PQC makes a variety of options possible for customizing the control settings to suit the individual application. The clear overview in the display provides effective monitoring of power factor correction. So-called ‘cyclic switching’ is a useful feature for prolonging the service life of the installation, since it ensures that all capacitor stages of the same power rating are on average switched in equally frequently.
Regeneration
The PQC has a four-quadrant control function. If active power is fed back into the sup­ply network, for example by combined heat and power systems, the PQC continues to correct for the reactive power drawn from the supply network. When this regeneration occurs, the active power P is displayed with a minus sign before it. Regeneration mode is also indicated by a symbol appearing on the display screen.
Instrument description | 15

4.2 Instrument versions

The PQC is available in various versions, identifiable by their type designation:
PQC xx x xxx x – x x Type designation
PQC PQC120601
240 48011––2310
Example
Measurement inputs: 1 = Temperature (I/O extension)
Interface: 2 = Modbus RTU 3 = Ethernet 4 = FRAKO Starkstrombus (Frakobus)
Measurement inputs: 1 = single-phase 3 = 3-phase
Max. supply voltage: 240 V 480 V
Output relays: 0 = 250 V 1 = 440 V
Number of switching outputs: 12 06

4.3 User interface

The instrument is operated with the following keys located below the display:
Key
Action
PQC
overview
Select Select
Note
The keys are assigned different functions according to the particular menu. These specific functions are described in the appropriate section.
16 | Instrument description
Open
submenu
Display
information
Icon Key Function
Escape Go back one level in the system tree.
Up
Down
Return/Enter
Info Help text
Increase a selected parameter by an increment. Move a selected item upwards.
Decrease a selected parameter by an increment. Move a selected item downwards.
Go one level deeper in the system tree (e.g. Select a chosen parameter). Select and confirm a chosen parameter (e.g. Adopt a value).
The PQC can be operated in three languages, which are selected at Main menu
> Parametrization > Service > Initial start-up (see Section 5.3.2 “PQC initial start-up”):
– German – English – French

4.4 Password protection

The PQC uses a password to prevent sensitive menu items being accessed by unau­thorized persons.
Protected menu items:
– Main menu > Parametrization
Security level 1, Password: last four digits of the serial number (see label on PQC or Section 6.4 “About PQC”.
– Main menu > Parametrization > Service > Reset switching cycles – Main menu > Parametrization > Service > Service
Security level 2, Password: 3725
The user is prompted to enter the password as soon as a protected menu is selected.
The and keys are used to adjust each digit, which is then confirmed with the key. Once the 4th digit has been confirmed with this key, the menus at the security level concerned become accessible for one hour.
Instrument description | 17

5 Installation

The installation of the PQC is carried out in three steps:
– Mounting at the desired location (see Section 5.1.1 “Preparing for installation” and
Section 5.1.4 “Mounting the instrument”)
– Electrical connections (see Section 5.2.1 “Electrical installation procedure” and
Section 5.2.2 “Completing the electrical installation”)
– Commissioning (see Section 5.3.1 “Preparations for start-up”)
The steps must always be taken in this order.

5.1 Mounting at the desired location

5.1.1 Preparing for installation

1. Verify that the set is complete (see Section 5.1.2 “Scope of supply”).
2. Inspect the instrument for any external damage. If any damage is apparent, for safety reasons it must not be put into service. In case of doubt, please contact FRAKO Service.
3. Verify that the intended location of the PQC is suitable (see Section 5.1.3 “Suita-
ble location”).

5.1.2 Scope of supply

The PQC and its accessories consist of:
– 1 PQC instrument – 4 or more (depending on the instrument version) reverse-polarity-proof male con-
nectors, supplied loose
– 1 operating manual – 1 DVD

5.1.3 Suitable location

The location where the PQC is installed must comply with the following conditions (see also Section 2.1 “Intended use” and Section 3 “Technical data”):
– Only install the PQC in areas where there is no danger of gas or dust explosions. – Do not expose the PQC to direct sunlight or high temperatures, and do not install
the instrument near to devices that generate heat.
– The PQC must be mounted in an adequately ventilated area. Its rear and sidewalls
must not be covered.
– Do not expose the instrument to rain, water, dampness or high levels of humidity.
18 | Installation
Avoid direct contact with water at all cost.
– Protect the PQC against jolting and physical blows.
The instrument is installed vertically on the outside of the control cabinet or enclosure so that the controls and display are accessible to the operator.
Hardware version V1.0: This is a Class A device. In office and residential areas, it can cause interference to radio reception. In this case, it may be necessary to take appro­priate precautions with the installation.
When considered from the rear, the PQC is a panel-mounted instrument with IP20 ingress protection. Adequate protection against inadvertently touching live compo­nents must be provided, and the ingress of dust and water must be prevented by ensuring that the instrument is installed in a suitable enclosure (e.g. control cabinet or distribution panel).

5.1.4 Mounting the instrument

The PQC is designed for mounting in a 138 mm x 138 mm cutout to IEC 61554 in the front of a control cabinet. It is held in place by four retaining lugs in the corners of the instrument.
Note
The option is given of mounting the PQC in control cabinets with IP54 ingress protection. For this an additional gasket (Article No. 20-50015) is available that seals the gap between the PQC front panel and the wall of the control cabinet.
Installation | 19
WARNING! Danger from electricity!
Touching live components at the instrument terminals and connecting cables can cause serious injury or may even be life-threatening.
–
Installation, commissioning, decommissioning and removal of the PQC may only be carried out by appropriately qualified personnel who have read and understood the content of this manual.
–
When the PQC is being fitted and connected, the instrument and the electrical system must be isolated from the power supply.
–
The isolated electrical system must be locked out to prevent its being
inadvertently switched on again. – It must be verified that none of the terminals are live. – All live components in the vicinity must be covered to prevent inadvertent
contact.
1. Turn the four retaining screws at the front of the PQC anticlockwise so that the four retaining lugs in the corners of the instrument are swivelled to lie flat behind its front panel.
2. Option: In the case of a cabinet with IP54 ingress protection, fit the gasket from the accessories set in the rear groove behind the PQC front panel.
3. Insert the sheet-metal rear of the PQC through the cutout provided in the control cabinet until fully home.
4. Press the PQC front panel gently against the control cabinet exterior and tighten the four retaining screws at the corners by turning them clockwise, applying a torque of ≤ 0.4 Nm. This causes the retaining lugs to swivel outwards and be drawn towards the inner side of the cabinet wall until they are held tightly up against it.

5.2 Electrical installation

5.2.1 Electrical installation procedure

WARNING! Danger from electricity!
Touching live components at the instrument terminals and connecting cables can cause serious injury or may even be life-threatening.
–
Installation, commissioning, modification and retrofitting at the PQC may only be carried out by appropriately qualified personnel who have read and understood the content of this manual.
–
When the PQC is being fitted and connected, the instrument and the electrical system must be isolated from the power supply.
20 | Installation
–
The isolated electrical system must be locked out to prevent its being
inadvertently switched on again. – It must be verified that none of the terminals are live. – All live components in the vicinity must be covered to prevent inadvertent
contact.
CAUTION! Danger from heat
The instrument terminals can become hot during operation and could cause burns.
– After the PQC has been operating, sufficient time must be allowed for the
instrument and its terminals to cool down before work is carried out on
the connections.
The PQC is connected as shown in the diagrams in Section 5.2.10 “Connection dia-
grams for all PQC types” and as specified in Section 5.2.3 “Specifications for the electrical connections”:
1. Connect the earth (see Section 5.2.4 “Earth connection”).
2. An external disconnecting device with a fuse must be fitted in the power supply
line to the PQC (see Section 5.2.5 “Power supply”).
3. Connect the voltage measurement cabling (see Section 5.2.6 “Voltage measure- ment”).
4. Connect the current measurement cabling (see Section 5.2.7 “Current measure­ment”).
5. Connect the output relays (see Section 5.2.8 “Output relays (control outputs)”).
6. If required, connect the alarm relay to transmit an alarm signal (see Section 5.2.9 “Alarm function”).

5.2.2 Completing the electrical installation

WARNING! Danger from electricity!
If there is a fault in the wiring adjacent to the PQC, there is a danger that its four retaining screws could become live and therefore a safety haz­ard. Touching live components at the instrument terminals and connecting cables can cause serious injury or may even be life-threatening.
–
Securely fasten the cabling at the location where the PQC is mounted (e.g. control panel, cabinet).
At the location where PQC is installed (e.g. control cabinet, enclosure), verify that all wires and cables are securely fastened or grouped in harnesses to ensure that any stray wire or strand cannot contact one or more of the instrument‘s retaining screws.
Installation | 21
5.2.3 Specications for the electrical connections
– Only approved solid core or stranded wire cables having an adequate cross sec-
tion and sufficiently high voltage withstand ratings must be used for the connect­ing cabling.
– If flexible stranded cables are used for the PQC connections, short ferrules 6 mm
in length must be crimped onto their ends.
– Suitable clips or other fasteners must be fitted to relieve any strain on the wires
and cables connected to the PQC.
– No additional connectors must be fitted in the wires and cables connected to the
PQC.
– All the connectors supplied with the PQC must be plugged in, even when it is
not intended to use them, and be secured to the instrument with their retaining screws, if provided.

5.2.4 Earth connection

An earthing tab is provided for the PE connection in the rear wall of the casing. It is marked with the earthing symbol as per EN 60617-2 shown at left
The PE conductor cross section must be at least equal to that of the larg­est conductor of the AUX phases, the voltage measurement connections, the relay outputs or the alarm connections. Its insulation colour is yellow/ green. Earthing connections for network power circuits must have at least the same current-carrying capacity rating as the circuits themselves.
If the earthing tab has broken off, the PQC must not be started up. The instrument must either be repaired or replaced.
Note
The PQC may only be put into service if the earthing conductor is con­nected to it.

5.2.5 Power supply

External disconnector
An external disconnecting device, such as an isolator or circuit breaker, must be fitted in the power supply line to the PQC. This must be located in the vicinity of the instrument and must be able to isolate all cables connected to the AUX terminals of the PQC. This device must not disconnect the earthing conductor.
22 | Installation
Fuses
The instrument power supply circuit AUX must be protected externally by one or two fuses, either:
– 2 A time delay, 250 V AC (PQC Type: PQC xxx240x-xx) or – 2 A time delay, 500 V AC (PQC Type: PQC xxx480x-xx).
One such fuse is required in the phase line when the power is from a phase – neutra l connection, but two fuses must be installed, one in each phase, if a phase – phase connection is used.
Please refer to the diagrams in Section 5.2.10 “Connection diagrams for all PQC types”, for further information.

5.2.6 Voltage measurement

Depending on the instrument type, the PQC can measure one, two or three AC volt­ages. The voltage measurement inputs are electrically interconnected via high resist­ances. See Section 3 “Technical data” for the measurement ranges. DC voltages cannot be measured.
The PQC voltage measurement inputs are designed for 100 – 690 V AC networks. It is possible to measure medium voltages using an x/100 V transformer. It is not necessary to provide external overcurrent protection in the voltage measure-
ment circuits since these are safety impedance-protected. In this case, a short-cir­cuit-proof cable (double insulated stranded wire) must be used to connect the voltage measurement inputs.
Instrument types with single-phase measurement:
For single-phase measurement, the terminals L and N/L are connected as shown in the diagrams in Section 5.2.10 “Connection diagrams for all PQC types”. The voltage can be measured between any two phases or between any phase and neutral.
Instrument types with 3-phase measurement:
For 3-phase measurement, the terminals L1, L2, L3 and N are connected as shown in the connection diagrams in Section 5.2.10 “Connection diagrams for all PQC types”. Phases L1, L2 and L3 must be connected in correct phase sequence.
For 3-phase measurement, it is advisable to connect the N terminal as well. This enables the high measurement accuracy of the PQC to be achieved when measuring phase – neutral voltages and the parameters derived from these. If no neutral conduc­tor is present, the N terminal can be left unconnected. However, this is only advisable when the phases are symmetrically loaded.
Note
If an instrument type designed for three-phase measuring is used to meas­ure only one phase, the terminals L1 and N must be used. The terminals L2 und L3 must then be commoned with the terminal N to prevent incor- rect measurements being made.
Installation | 23

5.2.7 Current measurement

The PQC is designed for connection to x/1 A and x/5 A external current transform­ers electrically isolated from the power supply. Depending on the instrument type, the PQC can measure one, two or three AC currents. Attention must be paid to the allowable measurement range. See Section 3 “Technical data” for further information.
WARNING! Danger from electricity!
If live current transformer circuits are interrupted, there is the danger that arcing may occur, which could cause electric shock, burns or eye injuries. In addition, red-hot metal particles could be spattered, which apart from the health hazard also constitute a fire risk.
– The retaining screws on the connectors must be tightened to prevent the
connectors accidently working loose.
–
The secondary-side connections of the current transformers must be short-circuited before the circuits to the PQC are interrupted or the con­nector removed!
Note
If an earth terminal is provided at the secondary side of the current trans­former, this must be connected to an earthing conductor! We recommend in general that every current transformer circuit be earthed.
Instrument types with single-phase measurement:
The current can be measured in any desired phase, with the current transformer cir­cuit connected to the L terminals S1 and S2 as shown in the diagram (see Section
5.2.10.1 “Connection diagram: Type PQC 1202401-xx”).
Instrument types with 3-phase measurement:
The current transformer circuits must be connected to the respective S1 and S2 ter­minals for each of the phases L1, L2 and L3, as shown in the diagram (see Section
5.2.10.2 “Connection diagram: Type PQC 1202403-xx”). Unassigned current measurement inputs can be left unconnected.
Note
In networks with a nominal voltage of 1000 V and more, the regulations call for the current transformer circuits to be earthed.
If networks with a nominal voltage of 1000 V or over are left unearthed, damage may occur to the instrument.
With three-phase measurement, automatic connection identification is not possible.
24 | Installation

5.2.8 Output relays (control outputs)

PE
L
Depending on instrument type, the PQC is equipped with 6 or 12 output relays (con­trol outputs). Relays or contactors are usually connected to these to switch the capac­itor stages in and out.
The output relays Q1–Q12 (Q1–Q6 in the case of PQC versions with 6 output relays) receive their control voltage from a common feed P. The load ratings of the output relays and the common feed line P can be found in the connection diagrams or the technical data (see Section 3 “Technical data”).
If not all of the available output relays are to be used, it is recommended to connect the output cables starting with output 1 and leaving no gaps.

5.2.9 Alarm function

The PQC has a volt-free contact to transmit alarms externally, alarm terminals a and b being provided for this external connection as shown in the diagrams in Section 5.2.10 “Connection diagrams for all PQC types”. Attention must be paid to the load rating of the contact (see Section 3 “Technical data”).

5.2.10 Connection diagrams for all PQC types

5.2.10.1 Connection diagram: Type PQC 1202401-xx
N
2A T
L/NL L/NL
Messspannung
voltage measurement
L
S2S1
100V– 690VAC~ VDE
Alarmrelais alarm relays 250V AC~ 3A cos φ =1
max.6A
ba
Alarm
Q1
Q2
Q3
Q4
100V-15% – 240V+10% AC~5 VA
Ausgangsrelais
output relays
250V AC~ 3A cos
Q7
Q6
Q5
Q8
φ =1
Q9
AUX
Versorgungsspannung
supply voltage
P
Q11
Q10
Q12
max.10A
Installation | 25
5.2.10.2 Connection diagram: Type PQC 1202403-xx
PE
L1
1L
PE
L
L2
L3
N
2A T
max.6A
max.6A
S2S1S2S1
L3L2
L/NL
Alarmrelais alarm relays 250VAC~ 3A cos
Messspannung voltage measurement 100V– 690VAC~ VDE
φ =1
250VAC~ 3A cos
L3L2
Versorgungsspannung
100V-15% – 240V+10% AC~5 VA
Ausgangsrelais
output relays
φ =1
AUX
supply voltage
/NL
L1
max.6A
S2S1
max.10A
ba
Alarm
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
P
Q11
Q10
Q12
5.2.10.3 Connection diagram: Type PQC 0602401-xx
N
2A T
L
S2S1
L/NL L/NL
Messspannung voltage measurement 100V– 690VAC~ VDE
Alarmrelais alarm relays 250VAC~ 3A cos φ =1
max.6A
ba
Alarm
Q1
Q2
Q3
Q4
100V-15% – 240V+10% AC~5 VA
Ausgangsrelais
output relays
250VAC~ 3A cos
Q6
Q5
φ =1
AUX
Versorgungsspannung
supply voltage
P
max.10A
26 | Installation
5.2.10.4 Connection diagram: Type PQC 1204801-xx
PE
L2
L3
L1
1L
PE
L2
L3
L1
1L
N
2A T
L/NL
Messspannung
voltage measurement
100V– 690VAC~ VDE
Alarmrelais alarm relays 250VAC~ 3A cos
φ =1
100V-15% – 480V+10% AC~5 VA
Ausgangsrelais
output relays
250VAC~ 3A cos
φ =1
Versorgungsspannung
AUX
supply voltage
/NL
L
max.6A
S2S1
max.10 A
ba
Alarm
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
P
Q11
Q10
Q12
5.2.10.5 Connection diagram: Type PQC 1204803-xx
N
2A T
L/NL
S2S1S2S1
max.6A
L3L2
max.6A
Alarmrelais alarm relays 250V AC~ 3A cos
Messspannung voltage measurement 100V– 690VAC~ VDE 100V– 600VAC~ UL
φ =1
250V AC~ 3A cos
L3L2
Versorgungsspannung
100V-15% – 480V+10% AC~5 VA
Ausgangsrelais
output relays
φ =1
AUX
supply voltage
/NL
L1
max.6A
S2S1
max.10 A
ba
Alarm
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
P
Q11
Q10
Q12
Installation | 27
5.2.10.6 Connection diagram: Type PQC 0614801-xx
PE
L
L1
N
2A T
L
S2S1
L/NL L/NL
Messspannung voltage measurement 100V– 690VAC~ VDE
100V– 600VAC~ UL
Alarmrelais alarm relays 250V AC~ 3A cos
max.6A
ba
Alarm
Q1
φ =1
Q2
440VAC~ 3A cos 250VAC~ 3A cos
100V-15% – 480V+10% AC~5 VA
Ausgangsrelais
output relays
Q4
Q3
φ =1 VDE φ =1 VDE
Q5
AUX
Versorgungsspannung
supply voltage
P
Q6
max.10 A
5.2.10.7 Options for connecting the AUX power supply for PQC xxx480x-xx types
Connecting the AUX terminals to a 100 to 480 V AC power supply
Part of connection diagram for 400/415 V networks with no neutral conductor
L2
L3
2A T
2A T
L2L1 L3 L/NL
AUX
PQC
Instrument type: PQC xxx480x-xx 400 V AC / 415 V AC – Networks with no neutral N
28 | Installation
Part of connection diagram for 690 V networks with a neutral conductor
L2
L1
2A T
L2
L3
L1
L2L1 L3 L/NL
2A T
PQC
AUX
L3
N
2A T
N
L2L1 L3 L/NL
PQC
Instrument type: PQC xxx480x-xx 690 V AC networks with neutral N (phase – neutral = 400 V AC)

5.3 Commissioning (initial start-up)

5.3.1 Preparations for start-up

WARNING! Danger from electricity!
Touching live components at the instrument terminals and connecting cables can cause serious injury or may even be life-threatening.
– It must be verified that the PQC is installed and connected in accordance
with its intended use before power is switched on.
– Cover the instrument terminals
ATTENTION! Risk to equipment!
If the PQC terminals are wrongly connected, or if the wrong voltages or signals are applied to them, this can damage the instrument itself and the installation.
– Verify that all the connections are correct before switching on the power.
AUX
1. Verify that the PQC has been correctly installed and connected as described
in Section 5.1 “Mounting at the desired location” and Section 5.2 “Electrical installation” and that all the connectors supplied with the instrument have been plugged in.
2. Verify that the earth connection has been made.
3. Ensure, for example by means of a closed door or a suitable cover, that the instrument terminals can no longer be touched.
4. Switch on the instrument power.
5. Carry out the initial start-up (see Section 5.3.2 “PQC initial start-up”)
Installation | 29

5.3.2 PQC initial start-up

Key
Confirm
Select
Action Main menu
language
dt – en – fr
When the power is switched on, the PQC Start screen is displayed, showing informa­tion about the installed firmware. The initial start-up dialogue then starts automatically, in which the essential parameters for operation can then be set and the start-up mode selected.
Note
If the PQC does not start, switch off the power and check the cabling.
The following parameters must be selected or confirmed:
Language German, English (factory default), French Network parameters Voltage transformer ratio
Range 1 to 300, transformer ratio:
Current transformer ratio
Range 1 to 7000, transformer ratio:
Example: current transformer
Transformer ratio: k=
Profile Control profile, with which the PQC is to operate after a suc-
cessful start-up.
The PQC as delivered from the factory is set with the FRAKO
specific kinked control characteristic curve and the target cos
φ
= 0.92 ind. See Section 6.3.3 “Control parameters”.
target
Communication Where relevant: settings for communication interface (Modbus
RTU / Modbus TCP / Frakobus). See Section 6.3.5 “Commu­nication (optional)”, for further information.
Select
language
dt – en – fr
Iprimary
=
Isecondary
Vsecondary
500 A
5 A
500 A
5 A
language
and return
to parameter
selection
Vprimary
Iprimary
Isecondary
=100
–
30 | Installation
Identification Automatic / manual connection and stage identification (see
Section 5.3.3 “Automatic connection and stage identification” and Section 5.3.4 “Manual connection and stage identifica- tion”)
Note
For the voltage and current readings (and the values of power derived from them) to be displayed correctly, it is essential that the voltage and current transformer ratios be entered.
Regardless of the initial start-up mode, all the configuration data are saved in a non-volatile memory. In the event of power loss (intended or not) these data are not lost. When the power supply returns, the PQC starts up automatically and begins the control process after booting up.
Note
Automatic connection and capacitor stage identification is only possible with single-phase measurement.
5.3.3 Automatic connection and stage identication
To start the automatic connection and capacitor stage identification procedure, select Auto in the Detection menu and confirm this with Continue.
The PQC switches the individual output relays one after the other and identifies not only the phase angle of the current and voltage measurement paths but also to which output each capacitor stage is assigned. Each output is switched several times until the PQC can verify the measured values.
This is shown in the following screenshots:
Stage capacitive power identification is being carried out; connection identification is complete, with the result con­nection type 4.
When the PQC has successfully completed the con­nection and stage identification procedure, the oper­ator must confirm the result with the key. The PQC then switches to operating mode and displays the PQC overview screen. If at this moment there is a concrete need for reactive power control, the PQC commences to switch stages in or out as necessary.
If the PQC was not able to complete the connection and stage identification proce­dure successfully, or if the user presses the ESC key to cancel it, this is indicated by a message on the screen. The initial start-up procedure can then be restarted.
Installation | 31
5.3.4 Manual connection and stage identication
To initiate the manual start-up procedure, select Man in the Detection menu and confirm this with Continue.
In the manual start-up, the following parameters must be determined manually and entered:
Connection type see Section 5.3.4.1 “Connection
type”
c/k value see Section 5.3.4.2 “Calculation
of c/k”
Switching sequence The switching sequence must be set in terms of the relative
values of the individual stages to each other: 1:1:1:1:1… 1:1:2:4:4… 1:2:3:4:4… 1:1:2:2:2… 1:1:2:4:8… 1:2:3:6:6… 1:1:2:2:4… 1:2:2:2:2… 1:2:4:4:4… 1:1:2:3:3… 1:2:3:3:3… 1:2:4:8:8… Number of C stages Indicates the number of control outputs used. When all the necessary information has been entered, confirm this with Continue. The
PQC then switches to operating mode and displays the PQC overview screen. If at this moment there is a concrete need for reactive power control, the PQC commences to switch stages in or out as necessary
Note
Manual start-up mode deactivates the capacitive power identification function when the PQC is operating.
32 | Installation
5.3.4.1 Connection type
With the connection type, the phase angle of the current and voltage measurement paths is indicated. It can be found from the table below:
Connection type Connection to voltage path
L/N – L L/N – L L/N – L
0 L1 – N L2 – N L3 – N
1 L1 – L3 L2 – L1 L3 – L2
2 N – L3 N – L1 N – L2
3 L2 – L3 L3 – L1 L1 – L2
4 L2 – N L3 – N L1 – N
5 L2 – L1 L3 – L2 L1 – L3
6 N – L1 N – L2 N – L3
7 L3 – L1 L1 – L2 L2 – L3
8 L3 – N L1 – N L2 – N
9 L3 – L2 L1 – L3 L2 – L1
10 N – L2 N – L3 N – L1
11 L1 – L2 L2 – L3 L3 – L1
Current transformer in:
Example:
The current transformer is installed in phase L2, while the voltage is measured between the phase L3 and N. It is therefore connection type 4.
If the current transformer is installed or connected the wrong way round, this can be corrected for by the choice of connection type, i.e. by adding 6 to the connection type number given by the table. In the above example, this gives the connection type 10. If the result of this addition were to be greater than 11, the rule is to subtract 6 from the connection type number instead.
L1
L2
L3
5.3.4.2 Calculation of c/k
To operate the system, the value of c/k (response current) must be determined. This equals 65 % of the nominal current of the smallest capacitor stage and is to be detected in the PQC current measurement path.
The c/k value can be calculated from the following formula:
IA=0.65 ·
Qsmallest stage
V · √3 · k
· 1000 ≈ 0.375 · IA = response current in mA to be set Qsmallest stage = capacitive power of smallest stage in var (not the total capacitive power
of the system)
Qsmallest stage
V · k
· 1000 [mA]
Installation | 33
V = network voltage in V at the primary side of the voltage transformer k = transformer ratio (primary side / secondary side)
Alternatively, for a 400 / 50 Hz network the c/k setting can also be read off from the table below:
c/k setting for 400 V 50 Hz AC network ~
Current Stage power (not total power) of the PF correction system in kvar
k 2.5
30/5 6 400 800 980 1200 1600
40/5 8 300 600 740 900 1200 1500
50/5 10 240 480 590 720 960 1200 1440
60/5 12 200 400 490 600 800 1000 1200 1600
75/5 15 160 320 390 480 640 800 960 1280 1600 1920
100/5 20 120 240 300 360 480 600 720 960 1200 1440 1920
150/5 30 80 160 200 240 320 400 480 640 800 960 1280 1600 1920
200/5 40 60 120 150 180 240 300 360 480 600 720 960 1200 1440
250/5 50 50 100 120 140 190 240 290 380 480 580 770 960 1150 1920
300/5 60 40 80 100 120 160 200 240 320 400 480 640 800 960 1600
400/5 80 30 60 80 90 120 150 180 240 300 360 480 600 720 1200
500/5 100 20 50 60 70 100 120 140 190 240 290 380 480 580 960
600/5 120 40 50 60 80 100 120 160 200 240 320 400 480 800
750/5 150 30 40 50 60 80 100 130 160 190 260 320 380 640
1000/5 200 20 30 40 50 60 70 100 120 140 190 240 290 480
1500/5 300 20 20 30 40 50 60 80 100 130 160 190 320
2000/5 400 20 30 40 50 60 70 100 120 140 240
2500/5 500 20 30 40 50 60 80 100 120 190
3000/5 600 20 30 40 50 60 80 100 160
4000/5 800 20 30 40 50 60 70 120
5000/5 1000 20 30 40 50 60 100
6000/5 1200 20 30 40 50 80
7000/5 1400 20 30 40 70
5 6.25 7.5 10 12.5 15 20 25 30 40 50 60 100
34 | Installation

6 Description of the menu

Main menu

6.1 Main menu

From the main menu, all the measurement readings and settings that the PQC makes available can be displayed and where possible changed.
The main menu is divided into three main groups: Display, Parametrization and About PQC
Display
PFC
System & PQ
Service
Alarms &
notific.
Configuration
Communica-
System
parameters
PFC Equip.
parameter
Control
parameters
Alarms
tion (dyn.)
Temp. I/O
(dyn)
Service
About PQC
FW
HW
SN
Sys time
Description of the menu | 35

6.2 Display

Frequency
s
Main menu > Display
In the Display menu, all measurement readings and parameters relevant to power factor correction are shown. The main Display menu items are:
PQC overview Measurement readings relevant to power factor correction Netw. and PQ Network and power quality parameters Service Status display Alarms & Messages Display of momentary alarms and the alarm history
Display
PFC
Alarms &
notific.
Utilization
V/I harmonics
Kvar
diagram
System & PQ
Service
Alarms &
notific.
Alarm history
System data
Configuration
Overview
THD
Cap. stage
status
36 | Description of the menu
Switching
outputs
V-harm.
spectrum
Switching
diagram
Min/Max
Control diagram
spectrum
Temperatures
Data
I-harm.
(dyn.)
analysis
I/O statu
(dyn.)

6.2.1 PQC overview

Main menu > Display > PQC overview
All measurement readings and parameters relevant to power factor correction are shown here.
6.2.1.1 Overview
Main menu > Display > PQC overview > Overview
cosφ Display of the momentary value of cosφ Capacity utilization The ratio of the momentary switched-in capacitance to the
total available capacitance, expressed as a percentage (0%=no capacitors switched in, 100%=all capacitors switched in).
Control Auto / Man and active control profile Alarm Flashes if an alarm is present. Regeneration Flashes if power is being fed in to the supply network
Note
If Alarm flashes, pressing the key will display the list of active alarms and messages.
6.2.1.2 Capacity utilization
Main menu > Display > PQC overview > Cap. utilization
Capacity utilization The ratio of the momentary switched-in capacitance to the
total available capacitance, expressed as a percentage.
Description of the menu | 37
Overcurrent This parameter is the ratio I
rms
/ I
i.e. the theoretically
50Hz,60Hz
determined ratio of the momentary RMS current to the fun­damental current in the capacitor. The choke factor p of the power factor correction system is also taken into account in this calculation.
Total Q power This parameter is the sum of all the connected 3-phase
capacitor stage corrective powers.
Available Q power This parameter is the 3-phase capacitor corrective power still
available for switching in.
6.2.1.3 Control outputs
Main menu > Display > PQC overview > Control outputs
The overview display shows the momentary statuses of all the capacitor stages.
Stages 1, 4, 5, 7, 10, 11: switched-out active stages Stages 8 and 12 switched-in active stages
A permanently switched-in fixed capacitor stage is shown as a switched-in active stage with an F.
6.2.1.4 Control diagram
Main menu > Display > Correction > Control diagram
The control diagram shows the currently selected control characteristic curve (active control profile) and provides visualization of the momentary operating point.
Scale: One scale division on the y-axis represents ⅔xsmallest capacitor stage
Key
Action
Back to
main menu
Zoom + Zoom - –
Additional
info
Zoom + Zoom in on control diagram Zoom - Zoom out of control diagram Additional info The following information is presented in a separate dialogue:
cos φ
38 | Description of the menu
, limitation L, parallel shift SP and the zoom factor.
target

6.2.2 System & PQ

Main menu > Display > System & PQ
6.2.2.1 Network variables
Main menu > Display > System & PQ > Network variables
cosφ Display of the momentary power factor cosφ V∆ / V V∆ phase-phase voltage / V phase-neutral
voltage
P Display of the momentary active power Q Display of the momentary reactive power
(if capacitive reactive power with a minus sign)
I Display of the momentary current S Display of the momentary apparent power ∑ Sum of all the phases (L1 to L3); if a single-phase PQC, theoretical
calculation of the sum assuming a balanced load
6.2.2.2 THD
Main menu > Display > System & PQ > THD
Display of THDv and THDi and their magnitudes as per­centages of the fundamental H1
Single phase PQC: display of Lx and Ix 3-phase PQC: display of all three THDv and THDi values
6.2.2.3 V/I Harmonics
Main menu > Display > System & PQ > V/I Harmonics
Display of percentage values of the voltage and current harmonics together with the fundamental values for voltage and current. With a 3-phase PQC, pressing the
key toggles the display through the phases L1 to L3.
Description of the menu | 39
6.2.2.4 V Harm. spectrum, I Harm. spectrum
Main menu > Display > System & PQ > V Harm. spectrum, I Harm. spectrum
Graphical display of the harmonics spectrum up to the 19th
Key
Toggle
Action
Back to
Display menu
Zoom + Zoom -
between
H1–12 and
H13–19
Additional
info
The fundamental at 50/60 Hz is shown as 100%. One scale division on the y-axis represents 5%.
6.2.2.5 Frequency analysis
Main menu > Display > System & PQ > Frequency analysis
Phase Measurement on Lx [1 ≤ X ≤ 3] Frequency 10 Hz to 2,500 Hz in steps of 10 Hz V(f) Magnitude of voltage at the selected fre-
quency as a percentage of the fundamental voltage V1 (f = 50/60 Hz)
I(f) Magnitude of current at the selected
frequency as a percentage of the fundamental I1 (f = 50/60 Hz)
Angle φ Angle between V Angle γ Angle between V1 (fundamental) and I
and I
(f)
in degrees
(f)
in degrees
(f)
Key
Action Info status
40 | Description of the menu
Frequency
+10 Hz
Frequency
–10 Hz
Select phase –

6.2.3 Service

Main menu > Display > Service
6.2.3.1 Conguration
Main menu > Display > Service > Configuration
Control status Automatic or manual control
mode
Switching sequence Display of the capacitor stages
detected. The relative values (switching sequence) can be distributed over the available stages as desired. The largest permitted relative value is 16, the smallest 0.
Available stages Number of capacitor stages detected c/k setting [mA] The response current is determined from the smallest capaci-
tor stage detected
Connection type Type of connection for L1, L2 and L3 current transformers.
See Table in Section 5.3.4 “Manual connection and stage
identification”
6.2.3.2 Stage status
Main menu > Display > Service > Stage status
No. No. of the stage [1–12] Stat. (status) ON / OFF / [x seconds]
ON: Switches stage in manually OFF: Switches stage out manu­ally [x seconds]: Time remaining until the capacitor stage can be switched in again (discharge time)
Q[var] This is the stage corrective power in var (3-phase stage
corrective power).
Switching cycles Number of stage switching cycles
Description of the menu | 41
6.2.3.3 Kvar diagram
Main menu > Display > Service > Kvar diagram
The capacitor stages rating diagram shows the momentary corrective power of the capacitor stages as a percentage. After the instrument has been started up, this graphic shows every detected stage as 100%. With time, however, capacitor wear causes this corrective power to fall.
6.2.3.4 Switching diagram
Main menu > Display > Service > Switching diagram
This diagram shows the switching cycle counters for all the stages as a column chart. 100% on the y-axis rep­resents the set limit for the number of switching cycles counted.
6.2.3.5 Temperatures (optional temperature I/O extension)
Main menu > Display > Service > Temperatures
Displays the temperature from the activated PT100 / 1000, NTC1 and NTC2 probes.
6.2.3.6 Temperatures (optional temperature I/O extension)
Main menu > Display > Service > I/O Status
Shows the available inputs and outputs of the tempera­ture I/O extension and indicates the status of each.
6.2.4 Alarms & notications
Main menu > Display > Alarms & notific.
Status of the momentary alarms Display of Alarms and Min/Max histories.
42 | Description of the menu
6.2.4.1 Alarms & notications
Main menu > Display > Alarms & messages > Alarms & notific.
All currently active alarms are shown in a list. If one of these is selected and the key is pressed, details such as the momentary reading are displayed.
The limits for several alarm can be set in the Parametri­zation menu (see Section 6.3.4 “Alarms”). All alarms are listed in Section 9 “Troubleshooting” gelistet.
Note The Alarms & messages menu can also be displayed from the menu item
Display > PQC overview > Overview if the key is pressed.
6.2.4.2 Alarm history
Main menu > Display > Alarms & messages > Alarm history
The alarm storage function displays the 10 most recently occurring alarms, with the latest alarm at the top and the oldest one at the bottom of the list (sorted by time). Selecting one of the lines shown and pressing the key causes the alarm condition to be displayed in plain language.
Description of the menu | 43
6.2.4.3 Min/Max data
Main menu > Display > Alarms & messages > Min/Max data
The Min/Max storage holds the minimum and maximum values of the following meas­urement readings:
– Measurement data per phase:
• Voltage
• Current
• Power (active, reactive and apparent)
• Network frequency
• Overcurrent
– Harmonics:
• Voltage harmonics
• Current harmonics
– Temperatures: (only available with the optional temperature and I/O extension)
• PT
• NTC1
• NTC2
Note
Pressing the key shows the times elapsed since the minimum and max­imum values displayed on the screen occurred.
44 | Description of the menu
6.3 Conguration
Configuratio
From the Parametrization menu, all the parameters relevant to the operation of the power factor correction system can be changed and configured to give customer-spe­cific control characteristics.
Main menu > Configuration
n
System
parameters
PFC Equip.
parameter
Communica-
tion (dyn.)
Temp. I/O
(dyn.)
Commissioning
Tuning
factor
System voltage
Control profiles
Manual
control
Factory
settings
System
freq.
Cyclic
switching
Alarms
Control
parameters
Alarms
Relay settings
Service
Reset switch.
count
CT ratioPT ratio
Discharge
time
Reset
Min/Max
Fixed stages
Reset alarm
history
Service
Description of the menu | 45

6.3.1 System parameters

Main menu > Parametrization > System parameters
Setting the specific parameters for the network to be controlled:
System nominal voltage Setting range: 60 V – 60 kV System nominal frequency 50 Hz, 60 Hz, Auto
Automatic mode: The PQC determines the network frequency automatically. In the case of networks with heavy voltage harmonics or commutation notches, it can be necessary to set the network nominal frequency manually to the appropri­ate value.
500 A
5 A
Vprimary
Vsecondary
Iprimary
Isecondary
= 100
Voltage transformer range 1 to 300, transformer ratio =
Current transformer range 1 to 7000, transformer ratio =
e.g. for a current transformer 500 A / 5 A transformer ratio K =
Iprimary
Isecondary
=

6.3.2 PFC Equip. parameter

Main menu > Parametrization > PFC Equip. parameter
Setting the specific parameters for the power factor cor­rection system:
Choke factor Detuning of the power factor
correction system (A value must be set for correct computation of overcurrent. If the system is not detuned, 0 % must be entered.)

6.3.3 Control parameters

Main menu > Parametrization > Control parameters
46 | Description of the menu
Setting the specific parameters for the PQC control function:
Control profiles Profile, profile switching
Profile: 5 control profiles, see Section 6.3.3.1 “Control profiles” Profile switching: Automatic switching of profiles to Q(V) or
Q(P), digital input, see Section 6.3.3.3 “Automatic switching over of the control profiles (profile switching)”
Cyclic switching ON / OFF (ON is recommended). The purpose of cyclic
switching is to ensure that all capacitor stages of the same power rating are switched in equally frequently.
Discharge time 5 – 900 s (1 s increments) capacitor stage discharge time.
The discharge time must be at least as long as the longest discharge time of the capacitors in use
Fixed stages Capacitor stages permanently switched in, not under PQC
control
6.3.3.1 Control proles
Main menu > Parametrization > Control parameters > Control profiles
Profile see Section 6.3.3.2 “Settable
control profiles”
Profile switching see Section 6.3.3.3 “Automatic
switching over of the control profiles (profile switching)”
6.3.3.2 Settable control proles
Main menu > Parametrization > Control parameters > Control profiles > Profile
Description of the menu | 47
Five control profiles can be individually selected and edited. The instrument is supplied with the following factory settings:
Profile 1 2 3 4 5
cosφ
target
Parallel shift –1.0 0.0 +1.0 –1.0 –1.0
Limitation +1,0 off off off off
Switching delay 45 s 45 s 45 s 45 s 45 s
Phase L1 L1 L1 L1 L1
0.92 ind 1.0 1.0 0.92 ind 0.96 cap
Typical control profile applications Profile 1 Describes the ideal control characteristic curve for all consumer net-
works where an inductive cosφ is called for.
Profile 2 Suitable for consumer networks where an average cosφ =1 is to be
achieved.
Profile 3 Suitable for consumer networks where cosφ is close to 1 but overcor-
rection is to be avoided.
Profile 4 Suitable for consumer networks, as described in Profile 1, but which
have their own generating facilities (e.g. CHP units) with permanent or frequent feed-in (regeneration) to the power supply network.
Profile 5 Suitable for generating networks, such as hydropower or wind tur-
bines, where a capacitive cosφ is called for.
Note
Further information is given in the “PQC Application Note“
Control profile parameters (Edit profile)
Key
Profile
Action
48 | Description of the menu
selection
(Save Yes/No)
Select
parameter
Select
parameter
Parameter
selection
Back to
parameter
selection
–
Parametrizing control profile
Key
cos φ
Profile selec-
Action
0.90 capacitive to 0.80 inductive (in increments of 0.01)
target
tion (Save
Yes/No)
Increase
value +
Decrease
value -
Back to
parameter
selection
–
Parallel shift –2.0 to +4.0 (in increments of 0.5) Limitation –2.0 to +2.0 (in increments of 0.5), OFF or with the SP (parallel
shift) option (mirror image of the characteristic curve across the y-axis into the regeneration quadrants). Additional informa­tion is given in the “PQC Application Note”.
Switching delay 5 to 500 seconds (in 1 s increments) Phase L1, L2 or L3: select control phase Active Activate control profile (only one profile can be active)
Setting cosφ
The desired value of cosφ
target
can be set from 0.80 inductive to 0.90 capacitive in
target
increments of 0.01. The mode of operation of this adjustment can be seen in the following diagrams:
Control characteristic at cosφ
target
=1 Limitation=0 Parallel shift=0
If the system operates within the band range shown, no switching operations will be activated.
Reactive power
Regeneration
One division =
ind
0.65 × smallest cap. stage
3
2
-2
-3
Switch in
Active power
Switch out
cap
Description of the menu | 49
Control characteristic at
Active power
Reactive power
ind
3
2
cap
Regeneration
Switch in
Switch out
One division =
0.65 × smallest cap. stage
-3
-2
cosφ
=0.92 ind
target
ind Limitation = 0 Parallel shift = 0
Reactive power
ind
Switch in
3
2
If the system operates outside the band range, the PQC will try to return to within the band range with the minimum number of switching cycles.
In this diagram, the action of the PQC during regeneration (feed-in
Regeneration
cap
-2
-3
One division =
0.65 × smallest cap. stage
Switch out
Active power
to the supply network) can be seen. The ‘kink’ in the band (characteristic line) is not reflected in the regeneration quadrants. Instead, the band extends laterally from the point where it crosses the reactive power axis (y axis).
By shifting the band into the capacitive range (see Parallel shift below), inductive reac­tive power during regeneration can be avoided almost completely. When a capacitive cosφ regeneration side (see 3rd diagram in the subsection „Limitation“ auf Seite 5152).
Parallel shift
This setting causes a parallel shift of the band range shown above through the set value. It will shift in the inductive direction if a plus sign is used, and in the capacitive
is set, the control band is a mirror image from the power draw side to the
target
direction if a minus sign is used. The values -2 to +4 can be set in increments of 0.5. The effects are illustrated by the
two examples in the following diagrams:
Control characteristic at cosφ Limitation=0
=1
target
Parallel shift=+1.0 (inductive)
Reactive power
ind
3
Switch in
The set cosφ
is therefore the
target
Regeneration
upper limit of the control band. Overcompensation is avoided.
50 | Description of the menu
cap
1
-1
-2
One division =
-3
0.65 × smallest cap. stage
Active power
Switch out
Control characteristic at
Active power
Reactive power
ind
2
1
cap
Regeneration
Switch in
Switch out
One division =
0.65 × smallest cap. stage
-3
cosφ
=0.92 ind
target
Limitation = OFF Parallel shift = –1.0 (capacitive)
Reactive power
ind
Switch in
2
1
Here the set cosφ the lower (more inductive) limit of the control band. When regenera­tion occurs, the lower (more induc­tive) limit constitutes a cos φ of 1. This means that no inductive reactive power can result during feed-in operation.
Limitation
This setting gives new possibilities that could not be attained previously due to con­flicting requirements.
The range of values for limitation are -2 to +2 in increments of 0.5, plus the setting OFF. Setting the limitation at 1 and cosφ parallel shift described above. If cosφ curve, as shown in the following example. The limitation forms an absolute boundary beyond which the reactive power may not go.
Control characteristic at cosφ Limitation=+1.0 Parallel shift= 0.0
This setting has the following effects:
constitutes
target
=0.92 ind
soll
– The set cosφ
on average, in the upper power
is attained,
target
range.
– Overcorrection (capacitive,
usually disruptive) is avoided in the low load range.
targ et
Regeneration
Switch out
-3
One division =
0.65 × smallest cap.
cap
stage
at 1.00 has exactly the same effect as the
target
is not set at 1, a kink results in the control
target
Reactive power
Regeneration
ind
4
3
-1
-2
cap
Switch in
Switch out
One division =
0.65 × smallest cap. stage
Active power
Active power
Description of the menu | 51
Active power
Reactive power
ind
cap
Regeneration
Switch in
Switch out
One division =
0.65 × smallest cap. stage
-2
-3
4
3
-1
An effective combination of “parallel shift” and “limitation” is illustrated in the following diagram:
Control characteristic at cosφ
=0.92 ind
target
Limitation = +1.0 Parallel shift = –1.0 (capacitive)
This example illustrates:
– In the “upper” power range,
the set cosφ
is specified
target
as the lower (more inductive) limit value.
– Overcorrection is avoided in
the low load range.
For the sake of completeness, the following diagram shows the characteristics of the control band when set for a capacitive cosφ not extend laterally at the reactive power axis into the regeneration quadrants, but is mirrored from the power draw side into the regeneration side.
Control characteristic at cosφ
= 0.95 cap
target
Limitation = –1.0 Parallel shift = 0
Reactive power
Regeneration
target
Reactive power
ind
4
3
Switch in
-1
-2
-3
cap
Switch out
One division =
0.65 × smallest cap. stage
Active power
. In this case, the control range does
ind
One division =
0.65 × smallest cap.
3
stage
2
Switch in
Regeneration
-2
-3
cap
Switch out
Active power
Switching delay
The switching delay, i.e. the time between one switching action and the next for the same capacitor stage, can be set between the values of 5 and 500 seconds in 5-second incre­ments. When a stage is to be switched in or out, the PQC waits for this switching delay to elapse before switching takes place. If more stages are required, the switching time delay is shortened in accordance with the number of stages concerned (e.g. 2 stages required = switching delay time ÷ 2, or 3 stages required = switching delay time ÷ 3).
52 | Description of the menu
In order to keep the wear of the contacts to a minimum, the switching delay time should be set to less than 45 seconds only in exceptional cases. The discharge time, which ensures that the capacitors are fully discharged before they are switched on again, takes precedence over, i.e. overrides, the switching delay.
Selecting the controlled phase
The Control profiles menu also includes the Phase set­ting. This is used to select the phase used by the PQC for control purposes (can only be edited on 3-phase PQCs).
Any one of the three phases L1, L 2 and L3 may be selected.
Note
With single-phase PQCs, it is always the connected phase that is con­trolled.
6.3.3.3 Automatic switching over of the control proles (prole switching)
Main menu > Parametrization > Control parameters > Control profiles > Profile switching
Automatic profile switching off Automatic profile switching Q(V)
Key
Action
Control
setting
Profile
-
switching
settings
Switching
type
(Q(V1) etc.)
–
The automatic profile switching function enables the PQC control profiles to be changed automatically. With this, a Q(V) or Q(P) control curve with 5 points on it can be set up (see PQC Application Note).
The following parameters can be used to prompt switching:
– Voltage (L–N) and (L–L) – Active power (phase power, total power) – Digital inputs of the Temp. I/O option – Frakobus tariff input (optional); only Profiles 1 and 2 can be switched over
Description of the menu | 53

6.3.4 Alarms

Main menu > Parametrization > Alarms
Alarms see Section 6.3.4.1 “Alarms” Relay function With this option, the action of the
alarm relay can be inverted:
NO mode: contact closes when
an active alarm occurs.
NC mode: contact opens when an active alarm occurs.
6.3.4.1 Alarms
Key
Action
PQC
setting
Select alarm
limit
Select alarm
limit
Edit alarm
limit
–
Alarm management
When an alarm condition occurs, the PQC offers various actions for signalling or processing the alarm. These can be parametrized individually for each alarm type.
– Transmission via alarm relay
If the alarm relay function is assigned to an alarm, the alarm relay incorporated in the PQC switches when the alarm occurs (connections: Alarm a, b) and remains in that state as long as the alarm is active.
– Alarm warning in the display
If the alarm display function is assigned to an alarm, an information window pops up in the PQC display. This message can be acknowledged by pressing the key, regardless of whether the alarm condition is still present or not.
– Emergency trip of the power factor correction system
Under critical alarm conditions, such as overcurrent, the PQC can initiate an emer-
54 | Description of the menu
gency trip in response to the alarm in order to protect the power factor correction system. This interrupts the automatic control function and deactivates (switches off) all the control outputs. Automatic control remains deactivated for the duration of the alarm plus a further 240 seconds. After this time, the PQC automatically begins to control the system to achieve cosφ
target
again.
– Alarm signal via Temperature I/O output
If the PQC has the Temperature I/O option, the alarms can also be connected to separate outputs. The assigned output remains switched on for the duration of the alarm concerned (NO mode only).
– Alarm signal via Modbus
If the PQC has the Modbus communications interface (RTU or TCP), the alarm register can be read for all existing alarms. Please refer to the Modbus Specification for further information
Note
The alarm setting options are describe in detail in the following sections. All Alarm messages are listed in Section 9 “Troubleshooting”.
6.3.4.2 Cosφ Alarm
Control band alarm: the PQC gives a cosφ alarm under the following conditions:
– The measured cosφ is more inductive than the control band and all the capaci-
tors are switched in. The PQC can therefore not switch in any more capacitance to make cosφ more capacitive (see A).
– The measured cosφ is more capacitive than the control band and all the capac-
itors are switched out. The PQC can therefore not switch out any more capaci­tance to make cosφ more inductive (see B and C).
Description of the menu | 55
With the control band alarm
P
option OFF, the alarm for cosφ in the C range can be suppressed. This range is not critical in most applications, since here cosφ is less than cosφ
target
.
Regen.
2
Q
(
· Q
3
inductive
cos (φ) = 1
-3 -2 -1 7654321
Q
kStage
capacitive
)
4
3
2
-2
-3
RM, EMR, PQC: cos (φ) alarm
A
B
RM, EMR, PQC: cos (φ) alarm
cos (φ)
C
6.3.4.3 Switching cycle counter
Alarm limit 10 k to 500 k (increments of: 1k), default value = 80 k
6.3.4.4 Undervoltage
arget
PQC: cos (φ) alarm
P
drawn
Alarm limit Cannot be adjusted. Triggered when the measured voltage
drops to less than 10 % of the set nominal network voltage.
6.3.4.5 Undercurrent
Alarm limit Cannot be adjusted. Triggered when the measured secondary
current drops below 10 mA.
56 | Description of the menu
6.3.4.6 Overcurrent
Overcurrent is the theoretically determined ratio of the momentary RMS current to the fundamental current in the capacitor (I
rms
/ I
). It therefore indicates how great the
50Hz,60Hz
proportion of harmonic currents is compared to the fundamental current. The choke factor p of the power factor correction system is also taken into account
in this theoretical calculation. The overcurrent in the capacitor can only be computed correctly when the exact
system choke factor is entered. If the system is not detuned, 0 % must be entered. Alarm limit 1 to 2.00 (increments of 0.01)
6.3.4.7 Zero (dud) stage detection
Alarm for detecting the fall in corrective power of a capacitor stage from its calibrated value. If the measured corrective power drops below the set limit, the stage is excluded from the power factor control process.
Setting range: OFF to 95 % (OFF: In the power factor correction process, there is no monitoring of stage corrective power.)
Note
If the PQC is calibrated manually, this alarm is automatically deactivated and the alarm limit set at OFF.
6.3.4.8 THDi
Alarm limit 5 % to 500 % (increments of 1 %)
Description of the menu | 57
6.3.4.9 V Harmonics
Alarm limit 0 % to 100 % (increments of 0.01 %)
6.3.4.10 I Harmonics
Alarm limit 0 % to 100 %
(increments of 0.01%)
6.3.4.11 Short-term voltage blackout (voltage sag)
The voltage sag alarm is designed to protect the capac­itors and their contactors against power cuts that are short enough to make the capacitor contactors open and immediately close again.
Alarm limit 50 % to 93 % (increments of 1 %) Voltage blackout (sag) in % (100 % being the nominal supply voltage): This is the root-
mean-square voltage setting at which the voltage sag detection function is to react. Presettings: Alarm given if voltage drops below 85 % of the nominal voltage.
– Voltage blackout (sag) 85 %
For this very important function to operate effectively, it is vitally important that the phase selected for the instrument power supply to the switching outputs is the same one selected for the voltage measurement.
58 | Description of the menu
6.3.4.12 Temperature PT-100 / 1000 / NTC1 / NTC2
(optional temperature I/O extension)
Alarm limit – 50 to 200 °C (increments of 1 %)
6.3.4.13 Inputs I/O 1–I/O 5
(optional temperature I/O extension)
An activated input of the temperature and I/O extension can allow the PQC to process logical signals.
Example: Interruption of the control function when a logical 1 is received. The possi­bilities here are extremely diverse.

6.3.5 Communication (optional)

Main menu > Parametrization > Communication (dyn.)
The PQC has several optional means of communication. The existence of this menu depends on whether the PQC is equipped with a communication option, and if so, what type.
Description of the menu | 59
6.3.5.1 Modbus RTU
PE
L
Modbus RTU connection
N
2A T
L/NL L/NL
Messspannung voltage measurement 100V– 690VAC~ VDE
Alarmrelais alarm relays 250VAC~ 3A cos φ =1
L
max.6A
S2S1
ba
Alarm Modbus RTU
Q1
Q4
Q3
Q2
100V-15% – 240V+10% AC~5VA
100V- 15% – 240V+10% AC~5VA
Ausgangsrelais
output relays
250VAC~ 3A cos
Q6
Q5
φ =1
AUX
Versorgungsspannung
Versorgungsspannung
supply voltage
supply voltage
P
The following parameters can be set in the Modbus con­figuration menu:
Bus address The PQC is accessed at the set
bus address
Baud rate 1200, 2400, 4800, 9600, 19200,
38400, 57600, 115200
Data bits 5 to 8 Stop bits 1 or 2 Parity even, odd or none
Note
Further details are described in the Modbus Specification.
A ≙ R×D/T×D-N Datenleitung-Minus (-) B
R×D/T×D-P Datenleitung-Plus (+)
≙
BA
max.10A
A B
60 | Description of the menu
6.3.5.2 Modbus TCP (IoT)
DHCP ON
To operate the PQC in DHCP mode, DHCP ON must be selected. The data displayed in this menu (IP, Mask, Gateway) indicate the network settings assigned by the server, meaning that the available services (Modbus TCP, web server) are accessible in the network.
DHCP OFF
To use the Ethernet interface with manual network configuration, the following settings must be made in the PQC:
– IP address – Subnet mask – Gateway (optional)
When these settings have been made, the available services (Modbus TCP, web server) can be accessed in the network.
The PQC is accessible via the Modbus TCP/IP protocol and port 502 at the set IP address. The data that can be retrieved are listed in the FRAKO Modbus Specification.
Note
The web server is only fully functional with the following browsers:
– Mozilla Firefox version 60.0.1 or later – Google Chrome version 66.0.3359.181 or later.
The PQC allows a maximum of 2 simultaneous connections.
Note
For additional information on the optional Ethernet interface please refer to the “PQC Application Note”.
Description of the menu | 61
6.3.5.3 FRAKO Starkstrombus (Frakobus)
PE
L
Frakobus connections
N
2A T
L/NL L/NL
Messspannung voltage measurement 100V– 690VAC~ VDE
100V-15% – 240V+10% AC~5VA
100V- 15% – 240V+10% AC~5VA
AUX
Versorgungsspannung
Versorgungsspannung
supply voltage
supply voltage
Masse
≙
A ≙ R×D/T×D-N
Datenleitung-Minus (-)
B
R×D/T×D-P Datenleitung-Plus (+)
≙
Prolumschaltung
T
≙
Q3
Ausgangsrelais
output relays
250VAC~ 3A cos
Q5
Q4
B
φ =1
Q6
T A
max.10A
P
B
A T
Alarmrelais alarm relays 250VAC~ 3A cos φ =1
L
max.6A
S2S1
ba
Alarm Frakobus
Q1
Q2
The PQC bus address can only be changed at the instru­ment itself.

6.3.6 Temperature I/O (optional)

Typical circuits for the passive digital inputs and outputs, plus the temperature meas­urement inputs, are shown in the following diagram:
Temperature measurement inputs
The configuration of the temperature measurement inputs can be carried out at the PQC: Main menu > Parametrization > Temp. I/O (dyn.).
The possible temperature units are:
– C (degrees Celsius) – K (Kelvin) – F (degrees Fahrenheit)
Here the temperature probes actually used are configured as active/inactive.
The temperatures measured by active probes connected to the inputs are displayed in the PQC Temperatures menu.
See Section 6.2.3.5 “Temperatures (optional tempera- ture I/O extension)”.
62 | Description of the menu
If a defined alarm limit is to be monitored with each tem­perature measurement input, these can be set in the PQC Alarms menu (see Section 6.3.4 “Alarms”). A fixed hyster­esis of 1.5 K is programmed.
Connections for a PT-100 / 1000 temperature measure­ment input are provided:
2-wire connection 3-wire connection 4-wire connection
In addition, one or two 2-wire NTC probes (Article No. 29-20094, 7-metre cable) can be connected as shown below:
Passive digital inputs and outputs
The terminals 1 to 5 can be configured for the particular application as inputs or out­puts in the PQC: Main menu > Parametrization > Temp. I/O (dyn.). If the configured inputs or outputs as used as alarms, the alarm routes can be set in the Alarms menu (see Section 6.3.4 “Alarms”).
The momentary statuses of the inputs and outputs are shown in the I/O Status menu (see Section 6.2.3.6 “Temperatures (optional temperature I/O extension)”).
Description of the menu | 63
One input can be used to switch between control profiles 1 and 2. This is configured in the PQC by navigating as follows: Main menu > Parametrization > Temp. I/O (dyn.). When this option is active, profile switching takes place exclusively via this input (no profile switching is then possible from the PQC menu or optional Modbus RTU interface) and only between the stored control profiles 1 (input 1: low level) and 2 (input 1: high level).
The digital inputs are suitable for electrical signals from 5 V DC up to a maximum of 24 V DC.
The digital outputs (open collector type) are suitable for an externally applied voltage up to a maximum of 24V DC and a maximum current of 100 mA.

6.3.7 Service

Main menu > Parametrization > Service (password protected)
6.3.7.1 Start-up
Main menu > Parametrization > Service > Start-up
See Section 5.3.2 “PQC initial start-up”.
6.3.7.2 Manual control
Main menu > Parametrization > Service > Manual control
ATTENTION! Risk to equipment!
Switching in capacitor stages manually can result in overcorrection of the system. This can cause other problems, such as resonance-induced over­voltage in the supply network and/or damage to the capacitor stages or other loads connected to the network.
– The supply network must be monitored for resonant conditions and over-
voltage whenever stages are switched in manually.
This menu shows the numbers of the stages (1 to 12), the status of each stage (ON/OFF), its corrective power (determined automatically or set manually) and its switch­ing cycles.
64 | Description of the menu
No. No. of the stage [1–12] Stat. (status) ON / OFF / [x seconds]
ON: switches stage in manually OFF: switches stage out manually [x seconds]: Time remaining until the capacitor stage can be switched in again (discharge time)
Q(var) Momentary stage corrective power in var
(This is the 3 phase stage corrective power.) Switching cycles Number of stage switching cycles When a stage is switched out again, this is done immediately. Before this stage can
be switched in again, it is necessary to wait until the capacitor‘s set discharge time has elapsed. A countdown of the remaining discharge time is displayed in the Sta­tus column. Not until this time has elapsed can the stage be switched in again. If it is attempted to switch in the stage before the countdown is finished, the message ‘Not possible’ is displayed. (The stage is then not switched in automatically after the discharge time has elapsed.)
Pressing the key displays the momentary values of cosφ, P and Q.
6.3.7.3 Factory default settings
Main menu > Parametrization > Service > Factory settings
Resets the PQC at its factory default settings (without affecting the switching cycle counter).
6.3.7.4 Clear switching cycles counters
Main menu > Parametrization > Service > Clear switching cycles
Reset switching cycle counters for all stages to zero (singly or individually, service password necessary); see Section 4.4 “Password protection”.
Note
A switching cycle counter may only be reset after the corresponding con­tactor has been replaced.
6.3.7.5 Reset Min/Max
Main menu > Parametrization > Service > Reset Min/Max
Reset all Min/Max values.
Description of the menu | 65
6.3.7.6 Reset Alarm history
Main menu > Parametrization > Service > Reset Alarm history
Reset all alarms saved until now.
6.3.7.7 Service
Main menu > Parametrization > Service > Service
Optional service functions Temp. I/O update Software update mode for Temp. I/O Temp. I/O CLI for FRAKO Service IoT update Software update mode for IoT IoT CLI for FRAKO Service Frakobus update Software update mode for Frakobus

6.4 About PQC

Main menu > About PQC
This item gives information about the instrument:
FW Firmware version number HW Hardware version number SN Serial number Sys Time Operating hours

6.5 Factory settings

Menu Parameter Setting
Network parameters (Section 6.3.1 “System parameters”)
Nominal voltage 400 V
Network parameters
System parameters (Section 6.3.2 “PFC Equip. parameter”)
System parameters
Control parameters (Section 6.3.3 “Control parameters”)
Control parameters
66 | Description of the menu
Nominal frequency Auto
Transformer ratio (I) 1
Transformer ratio (V) 1
Choke factor 7 %
Cyclic switching ON
Discharge time 60 s
Fixed stages 0
Menu Parameter Setting
cosφ 0.92 ind
Parallel shift –1
Settings for control prole 1
Limitation 1
Switching delay 45 s
Phase L1
Active ON
cosφ 1.0
Parallel shift 0
Settings for control prole 2
Limitation OFF
Switching delay 45 s
Phase L1
Active OFF
cosφ 1
Parallel shift +1
Settings for control prole 3
Limitation OFF
Switching delay 45 s
Phase L1
Active OFF
cosφ 0.92 ind
Parallel shift –1
Settings for control prole 4
Limitation OFF
Switching delay 45 s
Phase L1
Active OFF
cosφ 0.96 cap
Parallel shift –1
Settings for control prole 5
Limitation OFF
Switching delay 45 s
Phase L1
Active OFF
Alarms (Section 6.3.4 “Alarms”)
Alarms Relay function NO (normally open)
Control band alarm OFF
cos φ alarm
Alarm relay ON
Display ON
Emergency trip OFF
Description of the menu | 67
Menu Parameter Setting
Alarm limit 80 k
Switching cycle counters
Alarm relay ON
Display ON
Emergency trip OFF
Alarm relay ON
Undervoltage
Display ON
Emergency trip ON
Alarm relay OFF
Undercurrent
Display ON
Emergency trip ON
Alarm limit 1.20
Overcurrent
Alarm relay ON
Display ON
Emergency trip ON
Alarm limit 80 %
Zero stage detection
Alarm relay ON
Display ON
Emergency trip OFF
Alarm limit 50 %
THDi
Alarm relay OFF
Display OFF
Emergency trip OFF
68 | Description of the menu
Menu Parameter Setting
Harmonic
Alarm limit
V Harmonics
Alarm relay OFF
Display ON
Emergency trip OFF
Alarm limit 100 % all (IH2 – IH19)
I Harmonics
Alarm relay OFF
Display OFF
Emergency trip OFF
Alarm limit 85%
Voltage blackout
Alarm relay ON
Display ON
Emergency trip ON
Communication (Section 6.3.5 “Communication (optional)”)
Slave address 0
Baud rate 19200
Modbus RTU
Data bits 8
Parity None
Stop bits 1
DHCP OFF
Modbus TCP
IP 0.0.0.0
Subnet 0.0.0.0
Gateway 0.0.0.0
10 11 12 13 14 15 16 17 18 19
Alarm limit %
2 3 4 5 6 7 8 9
2
100
1 6
100
5
0.5
100
0.5
3.5
100
3
0.43 100
0.41
2
100
1.76
Description of the menu | 69
Menu Parameter Setting
Frakobus Frakobus address 0
Temp. I/O (Section 6.3.6 “Temperature I/O (optional)”)
Temperature units °C
PT OFF
NTC1 OFF
NTC2 OFF
Temp. I/O
I/O 1 Input
I/O 2 Input
I/O 3 Input
I/O 4 Input
I/O 5 Input

6.6 Service interface

The PQC has a service interface in the form of a Micro USB port. This is used for servicing tasks such as firmware updates.
Note
Use of this interface is solely for the use of trained FRAKO Service per­sonnel.
For further information concerning firmware updates please contact FRAKO Service by telephone at +49 7641 453 544 or by e-mail at service@frako.de.
70 | Description of the menu

7 General operation

The following points must be observed when the PQC is operated:
– The instrument must always be operated in a closed control cabinet. – All voltages applied to the instrument must never exceed the limits specified in the
technical data.
– The ambient temperatures must always be within the range specified in the tech-
nical data.
General operation | 71

8 Cleaning and maintenance

8.1 Safety during cleaning and maintenance

WARNING! Danger from electricity!
There are dangerous voltages present inside the PQC. Touching live com­ponents in the PQC or at the instrument terminals and connecting cables can cause serious injury or may even be life-threatening.
– Do not open the PQC casing. –
During cleaning and maintenance, the PQC and the connecting cables must be isolated from the power supply.
–
The isolated electrical system must be locked out to prevent its being
inadvertently switched on again. – All connections must be checked to verify that they are no longer live. – All live components in the immediate vicinity must be covered.

8.2 Cleaning

The PQC may only be cleaned with a dry cloth. Do not use aggressive or abrasive cleaning agents or solvents.

8.3 Maintenance

The PQC does not contain any components that need maintenance.
72 | Cleaning and maintenance

9 Troubleshooting

If alarms occur during operation of the PQC, the following table provides assistance in identifying and remedying the faults.
Alarm message
cosφ cannot be achieved
Voltage < set limit
Current < set limit
Voltage < set limit + Current < set limit
Fault Possible cause Remedial action
PQC not working; no display at front of instrument
PQC gives a cosφ alarm although the momentary cosφ is better (nearer to
1) than the target value. More capacitive than the control band but still inductive
PQC indicates or states that voltage is less than set alarm limit, although a voltage is shown on the screen.
No value for current shown in the display (0 A)
PQC shows no meas­ured voltage and no current, although it has been verified that power is connected and a current is flowing.
No power – or the wrong voltage – connected
See Section 6.3.4.2
“Cosφ Alarm”
for control band alarm settings.
The alarm limit has not been adjusted for the network nominal voltage. Default setting is for 400 V networks. Triggered when the network voltage is less than 85 % of the nominal voltage.
Break or short-circuit in the current transformer cable
The current in the current path is too low.
Defective current transformer
Multiple zero-voltage crossings in measured voltage.
Check that the correct instrument power supply is connected and that the fuse in the circuit has not blown.
See Section 6.3.4.2
“Cosφ Alarm”
for control band alarm settings.
Set the correct alarm limit for the network nominal voltage (see
Section 6.3.1 “System parameters”)
Use an ammeter to check current in current path (I
* 0.015 A).
min
Danger: see
Section 5.2.7 “Current measurement”
(I
* 0.015 A)
min
Install a smaller current transformer.
Check the current transformer.
Settings for the Network nominal parameters –> Change setting from Auto to the appropriate network frequency (50 Hz or 60 Hz).
Troubleshooting | 73
Alarm message
Overcurrent > set limit
Switching cycles > set limit
V Harm. > set limit
Zero stage detected
Voltage blackout (sag)
Connection not detected Stages not detected
Fault Possible cause Remedial action
Voltage harmonics in network too high
Triggered when ratio I I
exceeds alarm
50Hz,60Hz
rms
/
limit.
Number of switching cycles of one or more contactors exceeds set maximum
Replace the contactors concerned and clear their switching cycle counters.
Voltage harmonics in network too high
The PQC has detected one of more stages whose nominal power has fallen.
Capacitor stage(s) has/ have lost capacitance.
Because of an unstable network, the PQC has
Replace capacitor(s)
Deactivate the zero
stage detection function. mistakenly detected a loss of capacitance.
The PQC has detected one of more stages whose nominal power has fallen.
Capacitor stage(s) has/ have lost capacitance.
Because of an unstable network, the PQC has
Replace capacitor(s)
Deactivate the zero
stage detection function. mistakenly detected a loss of capacitance.
Short-time voltage black­out (voltage sag)
Triggered if a voltage sag causes the RMS voltage to fall below the set limit within the duration of a half-wave
74 | Troubleshooting
Alarm message
Connection not detected Stages not detected
Fault Possible cause Remedial action
During automatic calibration this message appears: Alarm detected No cap. stage
Fault in control cir­cuit (contactors not switching).
Fuses for the capaci­tor stages missing or defective
Current transformer installed in the wrong location
Check the control circuit against the connection diagram and check the fuse.
Check whether capaci­tors are energized after switching.
Check whether the current transformer has been installed as per the connection diagram.
Severe reactive power fluctuations
Wait for power supply to stabilize; set c/k factor and connection type manually.
Despite inductive load, no stages are switched in when PQC is in auto­matic mode.
When the PQC was pro­grammed, c/k, switching time delay or discharge time have been set too
Check the PQC pro­gramming and change if necessary.
high.
In automatic operation, the response current c/k was not correctly identified.
Another current meas­uring instrument (e.g. an ammeter) has been connected in parallel with
Check the control circuit against the connection diagram and repeat the calibration procedure.
All measuring instru­ments in the current path must always be connected in series.
the current path.
In automatic mode, one stage is continually being switched in and out (hunting).
The value of c/k was set too low when the PQC was programmed.
Severe load fluctuations;
Set c/k value correctly according to the table.
Set higher delay time. the delay time was set too low.
Troubleshooting | 75
Alarm message
Fault Possible cause Remedial action
The displayed cosφ is less than cosφ
target
although the PQC has switched in all stages.
Type of connection incorrectly entered.
Select type of connec­tion again.
Fault in control circuit. Check whether the
capacitor contactors have been activated.
Fault in capacitor circuit Check the fuses and
contacts of the capacitor contactors and possibly also measure the cur­rents of each capacitor stage with a tong tester.
Severe reactive power fluctuations
Read off the corrective power still lacking from the menus.
Faulty calibration Repeat the calibration
procedure.
PQC does not switch out all stages under low load conditions or during plant shutdown.
c/k set too high Set c/k according to
table.
PQC is in manual mode. Deactivate manual
control.
Wrong control profile selected
Adjust the control profile to suit system requirements.
The LCD backlighting comes on briefly then goes off again, while the LCDs display nothing or only the starting logo – the instrument restarts
Instrument power supply voltage is too low.
Check whether the cor­rect voltage is reaching the PQC. Is there is a high contact resistance in the power supply circuit?
repeatedly.
Capacitor stage statuses display appears on screen but capacitor contactors are not activated.
Control circuit is not con­nected properly or there is no control voltage.
Neutral not connected to contactors.
Check the control circuit against the connection diagram and check the fuse.
Note
Additional error messages are described in the “PQC Application Note”.
76 | Troubleshooting
10 Decommissioning and removal,
storage and disposal

10.1 Decommissioning the PQC

WARNING! Danger from electricity!
Touching live components at the instrument terminals and connecting cables can cause serious injury or may even be life-threatening.
–
Installation, commissioning and decommissioning of the PQC may only be carried out by appropriately qualified personnel who have read and understood the content of this manual.
–
Isolate the PQC and the system from the power supply before decom­missioning it.
–
The isolated electrical system must be locked out to prevent its being
inadvertently switched on again. – It must be verified that none of the terminals are live. – All live components in the vicinity must be covered to prevent inadvertent
contact
CAUTION! Danger from heat
The instrument terminals can become hot during operation and could cause burns.
– After the PQC has been operating, sufficient time must be allowed for the
instrument and its terminals to cool down before work is carried out on
the connections.
ATTENTION! Risk to equipment!
If the exposed ends of disconnected cables come into contact with each other, this can result in short-circuits and overloading of the installation conductors, resulting in damage to equipment.
–
All disconnected cables must be individually isolated and insulated, and
measures must be taken to prevent their inadvertent contact with live
components or electrically conducting parts.
1. Current transformers must be short-circuited.
2. Remove all cables from the PQC.
3. Individually isolate and insulate all disconnected cables and take measures to pre­vent their inadvertent contact with live components or electrically conducting parts.
Decommissioning and removal, storage and disposal | 77

10.2 PQC removal

The PQC is held in place against the rear of the cabinet front wall by four retaining lugs in the corners of the instrument. These can be released by undoing the retaining screws.
1. Turn all four screws anticlockwise with a screwdriver. This slackens the four retaining lugs and swivels them to lie flush behind the PQC front panel.
2. Withdraw the PQC from the front of the cabinet.

10.3 Storage

– The PQC must be stored in a clean, dry and dust-free location. – The storage temperature must be within the range -20 °C to +80 °C.

10.4 Disposal

Any electronic instrument that is no longer required must be disposed of in an envi­ronmentally sound manner.
ATTENTION! Risk to equipment!
Incorrect disposal can cause environmental pollution.
–
Dispose of the instrument in compliance with the regulations of the country concerned.
In the European Union, electrical scrap and electronic components are subject to the WEEE (Waste Electrical and Electronic Equipment) Direc­tive. These components must not be disposed of as normal domestic or commercial waste. In other countries, the equivalent local regulations must be followed when electronic instruments are disposed of. They must be handed in at special recycling centres.
One way of ensuring environmentally sound disposal is to return the instru­ments to FRAKO Kondensatoren- und Anlagenbau GmbH in Teningen, Germany, or the company‘s local representatives. Alternatively, the instru­ments can be given to a firm specializing in the recycling of electronic equipment.
78 | Decommissioning and removal, storage and disposal
Notes
| 79
Power capacitors
Reactive power controllers
Power factor correction systems Modules EMS components Measuring instruments and network analysers Power quality EMS ISO 50001
FRAKO Kondensatoren- und Anlagenbau GmbH Tscheulinstraße 21a
D-79331 Teningen Phone: +49 7641 453-0
Fax: +49 7641 453-535 sales@frako.de
www.frako.com
FRAKO 55-06006/03/19/9964 TSubject to technical changes
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