ABB PQFS Manual

—
INSTRUCTION MANUAL
Power Quality Filter PQFS
Installation, operation and maintenance
instructions

2Table of contents Manual Power Quality Filter PQFS
—
Table of contents
1Introduction to this manual .............................................................................................................. 6
1.1 What this chapter contains............................................................................................................................6
1.2 Intended audience ...........................................................................................................................................6
1.3 Compatibility ....................................................................................................................................................6
1.4 Contents.............................................................................................................................................................6
1.5 Related publications........................................................................................................................................6
2Safety Instructions............................................................................................................................. 8
3Upon Reception ................................................................................................................................ 10
3.1 What this chapter contains..........................................................................................................................10
3.2 Delivery inspection ........................................................................................................................................10
3.3 Unpacking instructions ................................................................................................................................10
3.4 Lifting and transportation guidelines.......................................................................................................10
3.5 Identification tag ........................................................................................................................................... 13
3.6 Storage ............................................................................................................................................................. 13
4Hardware description ...................................................................................................................... 14
4.1 What this chapter contains..........................................................................................................................14
4.2 Typical PQFS filter panel layout..................................................................................................................14
4.3 The PQF current generator hardware .......................................................................................................16
4.4 The PQF main controller ............................................................................................................................... 17
4.5 The PQF-Manager user interface................................................................................................................18
4.6 Location of the main PQFS components .................................................................................................25
4.6.1 Active filter components...................................................................................................................25
4.6.2 Active filter door components and protective grid....................................................................29
5Mechanical design and installation................................................................................................ 30
5.1 What this chapter contains......................................................................................................................... 30
5.2 Installation location requirements ........................................................................................................... 30
5.3 Airflow and cooling requirements.............................................................................................................. 31
5.4 Standard cubicle dimensions, fixing holes and clearances .................................................................32
5.5 Instructions for mounting the filter ..........................................................................................................33
5.6 Filter noise level............................................................................................................................................. 34
5.7 Instructions for mounting the PQF-Manager in enclosures ................................................................35
6Electrical design and installation ................................................................................................... 36
6.1 What this chapter contains..........................................................................................................................36
6.2 Instructions for connecting the PQF-Manager to a filter system ......................................................37
6.3 Checking the insulation of the assembly - earth resistance................................................................37
6.4 EMC considerations.......................................................................................................................................38
6.5 Earthing guidelines........................................................................................................................................38
6.6 Selection of the power cable size...............................................................................................................39
6.7 Selection of the power cable protection/filter input protection scheme........................................42
6.8 Connection of the PQFS to the network.................................................................................................. 44
6.8.1 Connection of the PQFS in 3-wire mode ...................................................................................... 45
6.8.2 Connection of the PQFS in 4-wire mode .......................................................................................47
6.9 Selection of the current transformers ..................................................................................................... 48
6.10 Current transformer installation............................................................................................................... 50
6.10.1 Basic rules for correct CT installation........................................................................................... 50
6.11 Electrical interconnection of PQFS enclosures.......................................................................................52
6.11.1 Mechanical interconnection of the enclosures............................................................................53
6.11.2 Control board cable interconnection.............................................................................................53
6.11.3 CT cable interconnection ................................................................................................................. 54
6.11.4 Connection of the power stage to the supply .............................................................................55
6.12 Electrical connections to the PQF-Manager user interface ................................................................ 56

Manual Power Quality Filter PQFS Table of contents 3
6.12.1 Cabling of remote control functionality........................................................................................57
6.12.2 Cabling of alarm functionality ........................................................................................................ 59
6.12.2.1 Alarm outputs .................................................................................................................... 59
6.12.2.2 Digital outputs....................................................................................................................62
6.12.3 Cabling of warning functionality.................................................................................................... 64
6.12.4 Cabling of the digital output contacts to monitor other filter operation modes than
warnings and alarms .................................................................................................................................... 65
6.12.5 Cabling of main/auxiliary control functionality ......................................................................... 66
6.12.6 Implementation of local start/stop buttons ...............................................................................67
6.13 Electrical connections of filter options and accessories......................................................................70
6.13.1 External communication with PQF .................................................................................................70
6.13.2 Connection of the Modbus adapter ............................................................................................... 71
7The PQF-Manager user interface .....................................................................................................72
7.1 What this chapter contains..........................................................................................................................72
7.2 PQF-Manager user interface description .................................................................................................72
7.3 PQF-Manager overview and navigation....................................................................................................73
7.4 Icons and main screen ..................................................................................................................................73
7.5 The PQF-Manager behavior during filter initialization......................................................................... 80
7.6 The PQF-Manager locking facilities ...........................................................................................................81
7.7 The PQF start, stop and fault acknowledgement menu.......................................................................82
7.8 The ‘Measurements’ menu.......................................................................................................................... 84
7.8.1 The ‘Overview’ menu ......................................................................................................................... 84
7.8.2 The ‘System values’ menu................................................................................................................ 86
7.8.2.1 Voltages .............................................................................................................................. 86
7.8.2.2 Line currents ...................................................................................................................... 88
7.8.2.3 Filter currents .................................................................................................................... 89
7.8.2.4 Total filter currents........................................................................................................... 90
7.8.2.5 Powers ..................................................................................................................................91
7.8.2.6 Temperatures .....................................................................................................................91
7.8.3 The ‘Min-Max logging’ menu ............................................................................................................92
7.9 The ‘Settings’ menu.......................................................................................................................................93
7.9.1 The ‘Customer settings’ menu ....................................................................................................... 94
7.9.1.1 Settings up harmonics, reactive power and filter mode......................................... 95
7.9.1.2 Temp unit...........................................................................................................................101
7.9.1.3 Activate menu...................................................................................................................101
7.9.1.4 Setting up alarms, warnings and digital inputs and outputs (D I/O) .................102
7.9.2 The ‘Commissioning’ menu ........................................................................................................... 104
7.9.2.1 Setting up the network characteristics and the filter synchro mode ................ 105
7.9.2.2 Setting up the filter characteristics ........................................................................... 106
7.9.2.3 Setting up the current transformer ratios and position ....................................... 108
7.9.2.4 Setting up the filter rating parameter ........................................................................ 114
7.9.2.5 Setting up the user’s requirements............................................................................. 115
7.9.2.6 Commissioning of temperature probes..................................................................... 116
7.9.3 The ‘Installation settings’ menu.................................................................................................... 117
7.9.3.1 Setting up the ‘standby’ function ................................................................................ 118
7.9.3.2 Setting up the ‘auto restart’ function.........................................................................120

4Table of contents Manual Power Quality Filter PQFS
7.9.3.3 Setting up the system clock ..........................................................................................120
7.9.3.4 Setting Password............................................................................................................. 121
7.9.3.5 Installation Locking ......................................................................................................... 121
7.9.4 Set Language .....................................................................................................................................122
7.10 The ‘PQF monitoring’ menu....................................................................................................................... 122
7.10.1 The ‘Status of module’ menu ......................................................................................................... 123
7.10.2 The ‘Filter load’ menu.......................................................................................................................123
7.10.3 The ‘Event logging’ menu................................................................................................................124
7.10.4 The ‘Active warnings’ menu............................................................................................................128
7.10.5 The ‘Number of errors’ menu .........................................................................................................128
7.10.6 The ‘PQF operation’..........................................................................................................................129
7.11 The ‘User Interface menu ...........................................................................................................................130
7.11.1 Manufacturer setting.......................................................................................................................130
7.11.2 About PQF ..........................................................................................................................................130
7.11.3 Screen configuration ....................................................................................................................... 131
7.11.4 Communication.................................................................................................................................132
7.11.4.1 Modbus RTU......................................................................................................................133
7.11.4.2 MAC address .....................................................................................................................135
7.11.4.3 Ethernet settings .............................................................................................................135
7.11.4.4 IP address ..........................................................................................................................139
8Commissioning instructions..........................................................................................................141
8.1 What this chapter contains........................................................................................................................141
8.2Step 1: Visual and installation check........................................................................................................142
8.3 Step 2: Setting the address of each unit in a multi-unit filter and terminate the CAN bus........142
8.4 Step 3: Voltage rating check/adaptation and phase rotation check ..............................................145
8.5 Step 4: Basic commissioning parameters set up (using PQF-Manager) ....................................... 146
8.6 Step 5: Automatic and manual CT detection procedure ................................................................... 148
8.6.1 Automatic CT detection procedure............................................................................................. 148
8.6.2 Manual CT detection procedure................................................................................................... 149
8.6.2.1 PQF connection diagram .............................................................................................. 149
8.6.2.2 Material needed and hypotheses for correct measurements.............................. 150
8.6.2.3 Checking the correct connection of the CTs with a two-channel scopemeter 150
8.6.2.4 Checking the correct connection of the CTs with a Fluke 41B or similar
equipment ..........................................................................................................................................154
8.7 Step 6: Before starting the filter ..............................................................................................................154
8.8 Step 7: Start the filter..................................................................................................................................154
8.9 Step 8: Generate filter load........................................................................................................................155
8.10 Step 9: Set up the user requirements......................................................................................................156
8.11 Commissioning report................................................................................................................................159
8.11.1 Filter identification.......................................................................................................................... 160
8.11.2 Inspection on site – verification of the active filter after installation.................................. 161
8.11.3 Programming.....................................................................................................................................162
8.11.4 Testing (with load) ...........................................................................................................................163
8.11.5 Programmed parameters .............................................................................................................. 164
8.11.6 Comments ..........................................................................................................................................166
9Operating instructions ...................................................................................................................167
9.1 What this chapter contains........................................................................................................................167
9.2 Starting and stopping the filter ...............................................................................................................167
9.2.1 Starting the filter with the PQF-Manager ...................................................................................168

Manual Power Quality Filter PQFS Table of contents 5
9.2.2 Stopping the filter with the PQF-Manager .................................................................................170
9.3 Modifying the user requirements............................................................................................................. 172
9.4 Changing the system temperature unit and PQF-Manager backlighting ...................................... 173
9.5 Consulting filter measurements............................................................................................................... 173
9.6 Consulting filter statistics and manufacturer data.............................................................................173
9.7 Filter behavior on fault – retrieving error information........................................................................174
10 Maintenance instructions...............................................................................................................176
10.1 What this chapter contains........................................................................................................................176
10.2 Maintenance intervals.................................................................................................................................176
10.3 Standard maintenance procedure ........................................................................................................... 177
10.3.1 Step 1: Check the ambient temperature conditions ................................................................ 177
10.3.2 Step 2: Record the filter operating status .................................................................................. 177
10.3.3 Step 3: Shut the filter down............................................................................................................ 177
10.3.4 Step 4: Inspect and clean the filter...............................................................................................178
10.3.5 Step 5: Check the condition of the filter contactors and fuses.............................................178
10.3.6 Step 6: Check the tightness of the electrical and mechanical connections .......................178
10.3.7 Step 7: Correct any abnormal conditions found .......................................................................178
10.3.8 Step 8: Restart the filter..................................................................................................................178
10.4 Fan replacement...........................................................................................................................................179
10.5 DC capacitor change .................................................................................................................................. 180
10.6 DC capacitor reforming............................................................................................................................. 180
10.7 Output filter board change........................................................................................................................ 181
10.8 Servicing report............................................................................................................................................ 181
10.8.1 Filter identification...........................................................................................................................182
10.8.2 Standard maintenance procedure................................................................................................183
10.8.3 Special service actions ....................................................................................................................185
10.8.4Comments ..........................................................................................................................................185
11 Troubleshooting guide .................................................................................................................. 186
11.1 What this chapter contains........................................................................................................................186
11.2 Fault treatment procedure ........................................................................................................................186
11.3 Spare part list for normal and dedicated filter servicing ...................................................................189
11.4 Troubleshooting guide .............................................................................................................................. 190
11.4.1 Verification of the PQF-Manager status and the system LEDs ............................................ 190
11.4.2 Fault tracing....................................................................................................................................... 191
12 Technical specifications ................................................................................................................ 210
12.1 What this chapter contains........................................................................................................................210
12.2 Technical specifications .............................................................................................................................210

6Introduction Manual Power Quality Filter PQFS
—
1Introduction to this manual
1.1 What this chapter contains
This chapter gives basic information on this manual.
1.2 Intended audience
This manual is intended for all people that are involved in integrating, installing,
operating and/or maintaining the PQFS active filter range products. People involved in
the integration, installation and maintenance of the equipment are expected to know
the standard electrical wiring practices, electronic components and electrical schematic
symbols. End users should focus on the Operating instructions (Cf. Chapter 9) and
Maintenance instructions (Cf. Chapter 10)of this manual.
1.3 Compatibility
The manual is compatible with all filters of PQF range with PQF-Manager software
versions or higher.
−V1 : V26 r3001
−V2 : V11 r23
−V3 : V2 r0
−V4 : V0.1 r8
This product is not backward compatible with any other PQFx (x: A, B, L, T, I, M, K, S) filter
product.
1.4 Contents
−Chapter 1: Introduction to this manual
−Chapter 2: Safety instructions
−Chapter 3: Upon reception
−Chapter 4: Hardware description
−Chapter 5: Mechanical design and installation
−Chapter 6: Electrical design and installation
−Chapter 7: The PQF-Manager user interface
−Chapter 8: Commissioning instructions
−Chapter 9: Operating instructions
−Chapter 10: Maintenance instructions
−Chapter 11: Troubleshooting guide
−Chapter 12: Technical specifications
1.5 Related publications
−Power Quality Filters PQFI-PQFM-PQFS Catalogue [English]

Manual Power Quality Filter PQFS Introduction 7
−Power Quality Filter, Active Filtering Guide [English]
−PQ-Link Installation and user’s guide [English]
−PQF Modbus CD [English]
−ABB PQF Active Filters - Raising system reliability to unprecedented levels
[English]
−ABB quick start

8Safety Instructions Manual Power Quality Filter PQFS
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2Safety Instructions
These safety instructions are intended for all work on the PQFS. Neglecting these
instructions can cause physical injury and death. All electrical installation and
maintenance work on the PQFS should be carried out by qualified electricians. Do not
attempt to work on a powered PQFS
After switching off the supply to the PQFS, always wait at least 25 minutes before
working on the unit in order to allow the discharge of DC capacitors through the
discharge resistors. Always verify by measurement that the capacitors have discharged.
DC capacitors may be charged to more than 800 Vdc.
Before manipulating current transformers, make sure that the secondary is short-
circuited. Never open the secondary of a loaded current transformer.
You must always wear isolating gloves and eye-protection when working on electrical
installations. Also make sure that all local safety regulations are fulfilled.
DANGER: To ensure safe access, supplies to each individual enclosure must be isolated
before entry / opening.
WARNING: This equipment contains capacitors that are connected between phase and
earth. A leakage current will flow during normal operation. Therefore, a good earth
connection is essential and must be connected before applying power to the filter.
WARNING: There are AC capacitors & DC capacitors connected inside this filter. Before
performing any maintenance work, please short and ground the three line terminals.
The DC capacitor needs 25 mins to discharge after disconnection. Please wait for this
duration before touching any live parts even after discharging the AC capacitors to
avoid electrical shock.
WARNING: Never discharge DC capacitors through short circuit. Always use a current
limiting resistor of minimum 100Ω.
WARNING: To avoid electrical shock due to residual voltage on the capacitors, the left
side cover of the filter should not be removed once the filter is commissioned.
WARNING: If the ground is not done properly, under certain fault conditions in the unit
or in the system to which it is connected it can result in full line voltage between
chassis and earth ground. Severe injury or death can result if the chassis and earth are
touched simultaneously.

Manual Power Quality Filter PQFS Safety Instructions 9
WARNING: The neutral current in a PQFS filter may be as high as 3 times the line current
hence do not use a 4 pole breaker to connect this type of filter as the rating of the
neutral pole may not be adequate.

10 Upon Reception Manual Power Quality Filter PQFS
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3Upon Reception
3.1 What this chapter contains
This chapter gives basic information on how to inspect, transport, identify and store the
PQFS active filter.
3.2 Delivery inspection
Each PQFS is delivered in a box designed to protect adequately the equipment during
shipment. Upon reception of the equipment, make sure that the packing is in good
condition. Verify the state of the shock and tilting indicators (if mounted on the
enclosure).
After removal of the packing, check visually the exterior and interior of your filter for
transportation damage.
3.3 Unpacking instructions
Figure 1: PQFS packing material opened
After removal of the top cover, check visually the exterior and interior of your filter for
transportation damage.
Your filter equipment comes with a package. Verify that all items are present, i.e.:
−this manual
−the electrical drawing
−the rubber seal to cover a knock-out (to be used for multi-unit operation)
−the communication cable needed for multi-unit operation
−the two eyebolts
Any loss or damage should be notified immediately to your ABB representative.
3.4 Lifting and transportation guidelines
Please note that filter equipment weighs approximately 130 kilograms. Care should be
taken to ensure that correct handling facilities are used.

Manual Power Quality Filter PQFS Upon Reception 11
In order to transport the equipment use a forklift or similar equipment. PQFS enclosures
are best transported horizontally.
Table 1: Maximum allowed ambient conditions during transportation
Transportation (in the protected package)
Temperature -25 to 70°C (-13 to 158°F)
Relative humidity
Max. 95%
Contamination levels (IEC 60721-3-3)
Chemical class 3C3(a)
Mechanical class 3S3(b)
Remarks:
(a) Locations with normal levels of contaminants, experienced in urban areas with industrial
activities scattered over the whole area, or with heavy traffic. Also applies to locations with
immediate neighborhood of industrial sources with chemical emissions.
(b) Locations without special precautions to minimize the presence of sand or dust. Also
applies to locations in close proximity to sand or dust sources.
In order to lift the equipment once it is at the installation location:
−Remove the top cover of the protecting box (see Figure 1).
−Remove the 4 panel securing screws at the bottom and the top of the enclosure
(see Figure 2).
Bottom side Top side
Figure 2: Locating the 4 panel securing screws
−Remove first the right side of the protective cover and put it aside (see Figure 3).
Figure 3: Lifting the right protective cover and putting it aside

12 Upon Reception Manual Power Quality Filter PQFS
−Unplug the PQF-Manager from the main system (see Figure 4). Then the
protective cover can be safely put aside.
Figure 4: Unplugging the PQF-Manager from the main system
−Remove the two screws fixing the filter unit to the wooden support (see Figure
5).
Right side Bottom
Figure 5: Position of the filter fixation screws that need to be removed
−Fix the two eyebolts provided with the filter (see Figure 6).
Figure 6: Fix the eyebolts before lifting the PQFS

Manual Power Quality Filter PQFS Upon Reception 13
−Fix an appropriate lifting device to the eyebolts to lift the filter from the wooden
support. It can then be positioned at the desired location (see Figure 7).
Figure 7: Lifting a PQFS unit by using the lifting lugs
3.5 Identification tag
Each PQFS is fitted with nameplates for identification purposes.
The filter nameplate is located at the top left of the master panel door, at the outside.
The nameplate information should always remain readable to ensure proper
identification during the whole life of the filter. The main filter nameplate includes the
filter type, the nominal voltage range and frequency as well as a serial number and an
ABB internal article code.
3.6 Storage
If your PQFS is not installed once unpacked, it should be stored in a clean indoor, dry,
dust free and non-corrosive environment. The storage temperature must be between -
25°C (-13°F) and 70°C (158°F) with a maximum relative humidity of 95%, non-condensing.
Table 2: Maximum allowed ambient conditions for storage
Storage (in the protected package)
Temperature
-25 to 70°C (-13 to 158°F)
Relative humidity
Max. 85%
Contamination levels (IEC 60721-3-
3)
Chemical class 3C3
(a)
Mechanical class 3S3(b)
Remarks:
(a) Locations with normal levels of contaminants, experienced in urban areas with industrial
activities scattered over the whole area, or with heavy traffic.
(b) Locations without special precautions to minimize the presence of sand or dust. Also
applies to locations in close proximity to sand or dust sources.

14 Hardware description Manual Power Quality Filter PQFS
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4Hardware description
4.1 What this chapter contains
This chapter describes a typical PQFS-filter system and discusses its main components.
4.2 Typical PQFS filter panel layout
The PQFS active filter is basically composed of two parts (Figure 8):
−A filter controller that determines the anti-harmonic current to be injected based
on the line current measurements and the user’s requirements. The line current
measurements are obtained from current transformers (CTs) provided by the
customer. The CTs must be connected upstream of the connection point of the
filter and the loads. The user enters his requirements by means of the PQF-
Manager user interface. This device also acts as the user’s connection point for
the alarm/warning contacts, the remote control functionality, the other digital
input functionality and the interface for external communication.
−A current generator (power unit) that converts the control signals generated by
the filter controller into the filter compensation current. The current generator is
connected in parallel with the load(s). Up to eight power units may be connected
in parallel in one filter unit. The enclosure(s) containing the/a filter GUI controller
are referred to as master units. The other enclosures are referred to as the slave
units. In an active filter system more than one master unit can be present.
Compensation current
Current measurements
Non-linear load(s)
- Three-phase
- Single-phase
Supply
PQFS Filter panel
PQF main
controller
PQF current
generator 1
PQF Manager
1
2
3
5
4
6
Figure 8: PQFS schematic overview with user connections
The user connection description is given in Table 3.

Manual Power Quality Filter PQFS Hardware description 15
Table 3: User connections for PQFS
Item
User connections
Connection requirement
1
CT connections
Mandatory
2
Power cable connection to the supply (including
neutral connection if 4-wire operation is desired) Mandatory
3
Programmable digital outputs (warnings…)
Not mandatory
4 Remote control contact connection or/and local
on/off buttons or/and main/auxiliary settings control Not mandatory
5 PQ-link (USB-Ethernet) – Modbus RTU – Modbus TCP
communication connection Not mandatory
6
Earth connections from the enclosure to installation
earth Mandatory
Mandatory connections are connections that must be present to make the filter
operational. Connections that are not mandatory can be made to enhance the filter’s
basic functionality. For more information on cabling the user connections, please refer
to Chapter 6.
Figure 9shows a typical PQFS master filter panel.
1
2
4
5
3
Figure 9: Example of a typical PQFS master filter panel
The input/output connections and protection description is given in Table 4.
Table 4: Input/Output connections
Item Input/output connections
1 CT connection terminals
2 Main power connection
3
Auxiliary fuse protection
4
PQF-Manager user interface with connection terminals for user I/O (e.g. alarm
contact) and communication interfaces.
5
Neutral connection

16 Hardware description Manual Power Quality Filter PQFS
Up to 8 PQFS master panels can be connected in parallel providing full redundancy to the
customer. In addition to using master panels only, PQFS units can be connected in a
master-slave arrangement.
4.3 The PQF current generator hardware
The power circuit of a PQFS unit is represented hereafter.
N
Preload
resistor
Output filter
IGBT
Inverter
Master Unit
N
AC power supply
L
L
1
2
3
4
5
6
7
8
Figure 10: Power circuit diagram of a PQFS active filter
The description of the main components is given in Table 5.
Table 5: Main components of a PQFS active filter
Item Main components
1
IGBT inverter
2 DC bus capacitors
3 PWM reactor
4
Output filter
5
Preload resistor
6
Main contactor
7 Auxiliary fuses
8 Neutral cable connection (not mandatory)

Manual Power Quality Filter PQFS Hardware description 17
The current generator is physically organized in power units. Each filter enclosure
contains one power unit. A PQFS filter can contain up to 4 power units. Power units can
be combined in a master-slave arrangement or in a master-master arrangement, the
latter giving full operational redundancy. The current rating of different units in a filter
must be the same. Please refer to Chapter 12 for more information on the possible unit
ratings.
In Figure 10 it may be seen that each current generator consists of an IGBT-inverter
bridge (1) that is controlled using PWM-switching technology. Information from the filter
controller is sent to the IGBTs through one flat cable. At the output of the inverter a
voltage waveform is generated which contains the desired spectral components
(imposed by the filter controller) as well as high frequency noise (due to the IGBT
switching technology). Coupling impedance consisting of a reactor (3) and a high
frequency rejection filter (4) ensures that the useful voltage components are converted
into a useful current while the high frequency noise is absorbed. The IGBT-inverter is
equipped with DC capacitors that act as energy storage reservoirs (2).
In active filters containing more than one power unit the control information between
different units passes through a CAN control cable.
If a master-master configuration of filter is chosen, all power units incorporate a PQF-
Manager display. If a master-slave configuration of filter is chosen, only the master
enclosure contains a PQF-Manager display. All units contain a DC capacitors preloading
resistor (5) which charges the DC capacitors of the filter unit once the auxiliary fuse box
of the unit(s) is closed. This approach ensures a smooth filter start-up without excessive
inrush currents.
4.4 The PQF main controller
The PQF main controller controls the complete active filter system. Its tasks include:
−Accepting and executing customer requests to stop and start the equipment.
−Calculating and generating IGBT-inverter control references based on the line
current measurements and the user requirements.
−Interface to the IGBT-inverters.
−Measurement of system voltages and currents for control, protection and
presentation purposes.
Figure 11 depicts the controller interface diagram of the PQFS active filter.

18 Hardware description Manual Power Quality Filter PQFS
PQF
Manager
PQF
Power
Stage
CAN
Bus
Direct Interface
Modbus & PQ-Link interface
Programmable Digital I/O
3∼AC Out
First
unit
Second
unit
User interface
CT signals(a)
PQF
main
controller
CAN bus (1)
PQF
Power
Stage
3∼AC Out
PQF
main
controller
PQF
Manager
(b)
(a) CT signals to different units (master or slave) must be routed through daisy chain principle with
return path.
(b) If second unit is a slave unit, it will not have a PQF-Manager. If second unit is a master unit, it will
CT’s
Figure 11: Controller interface diagram of the PQFS active filter
When the filter consists of a master unit only, the customer has to:
−Wire the CT signals (on a designated terminal),
−Connect the AC power lines (with or without neutral),
−Set up the installation parameters and user’s requirements with the PQF-
Manager.
He may also want to wire the communication interface (Modbus or Ethernet) and the
programmable digital I/O (e.g. alarm contact, remote control).
When a second unit is added, it is connected to the first enclosure by means of a CAN
bus communication link (1). In addition, the CT measurements have to be supplied to
each unit, i.e. through a daisy chain link with return path.
All units have their own AC-connection and main contactor protection.
A PQFS active filter system consists of up to 8 units of equal rating. Additional units to
the first master unit may be master or slave units. Slave units do not have a PQF-
Manager.
4.5 The PQF-Manager user interface
All user interaction with the filter is channeled through the PQF-Manager.
In multi-unit filters consisting of only one master, only the master has a PQF-Manager.
In multi-unit filters consisting of more than one master, all the master units have a PQF-
Manager. However, only the PQF-Manager that is connected to the master unit which

Manual Power Quality Filter PQFS Hardware description 19
has the overall control will be active. The PQF-Manager installed on the unit’s operating
as "slaves" are capable of displaying the relevant information about that specific unit
only. Certain parameters which are specific to that unit (e.g. related to temperature
probes) can be set or changed locally using the PQF-Manager installed on that unit. The
PQF-Manager on the master unit has a "unit selection" button which allows the user
to select the unit number which he wants to consult. The data then displayed on the
master PQF-Manager is specific to that particular unit number. This unit selection
button is "deactivated" on the slave Managers. Figure 12 shows the front side of the PQF-
Manager.
Figure 12: Front side of the PQF-Manager
Five main parts can be distinguished (see Table 6)
Table 6: Front side of the PQF-Manager
Item
Description
1
Menu display
By navigating through the menus with the , , and
buttons, the filter can be set-up and controlled.On-line help is available by pressing
the button.
2 Master/slaves units monitor
3
Locking status / Alarm and fan contact indicator / Digital output contact indicator
When the PQF-Manager closes one of its output relays, the corresponding symbol
lights up. The digital outputs of the PQF-Manager are discussed later in this section.
4 Filter selection
5
Start stop acknowledgment fault

20 Hardware description Manual Power Quality Filter PQFS
The PQF-Manager also acts as connection point for external user I/O communication.
Connections are made at the rear side of the PQF-Manager. Figure 13 depicts the
terminals that are present on the PQF-Manager rear side.
1
2
3
4
5
6
7
8
9
10
Figure 13: PQF-Manager rear side terminal designation
The terminal designation is given in Table 7.
Table 7: Terminal designation
Item
Customer terminals
1 Digital input 1 and 2
2 Digital outputs 1 to 6 with one common point
3 Alarm outputs (2 outputs with complementary signals) and fan outputs
4
Lock switch
5
Modbus adapter interface (optional) connection
6 CAN bus connection interface (routed to PQF-Manager connector)
7 Power supply terminals (routed to PQF-Manager connector)
8 Ethernet
9
USB
10
Temperature probes
The terminal explanation is given next:
1
Digital input 1 and 2
The digital inputs can be used for three different functions:
−Implementation of remote control functionality;
−Implementation of local on/off buttons (not provided);