AccuSine™ PCS+ Active Harmonic Filter

AccuSine™ PFV+ Electronic VAR Control

600-690 Volt UL Type 2, UL Type 12, IP31, and IP54
Installation Manual
NHA71461-00
06/2015
Safety information

Important information
Read these instructions carefully and look at the equipment to become familiar
with the device before trying to install, operate, service or maintain it. The
following special messages may appear throughout this bulletin or on the
equipment to warn of potential hazards or to call attention to information that
clarifies or simplifies a procedure.
The addition of either symbol to a “Danger” or “Warning” safety label indicates that an
electrical hazard exists which will result in personal injury if the instructions are not
followed.

This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.

DANGER
DANGER indicates a hazardous situation which, if not avoided, will result in death
or serious injury.

WARNING
WARNING indicates a hazardous situation which, if not avoided, could result in
death or serious injury.

CAUTION
CAUTION indicates a hazardous situation which, if not avoided, could result in
minor or moderate injury.

NOTICE
NOTICE is used to address practices not related to physical injury.

Please note
Electrical equipment should be installed, operated, serviced and maintained only by
qualified personnel. No responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material.

A qualified person is one who has skills and knowledge related to the construction,
installation, and operation of electrical equipment and has received safety training to
recognize and avoid the hazards involved.

Legal information
The Schneider Electric brand and any registered trademarks of Schneider Electric
Industries SAS referred to in this guide are the sole property of Schneider Electric SA
and its subsidiaries. They may not be used for any purpose without the owner's
permission, given in writing. This guide and its content are protected, within the

NHA71461-00 3
 AccuSine PCS+ / PFV+ Installation Manual

meaning of the French intellectual property code (Code de la propriété intellectuelle

français, referred to hereafter as “the Code”), under the laws of copyright covering texts,
drawings and models, as well as by trademark law. You agree not to reproduce, other
than for your own personal, noncommercial use as defined in the Code, all or part of
this guide on any medium whatsoever without Schneider Electric’s permission, given in
writing. You also agree not to establish any hypertext links to this guide or its content.
Schneider Electric does not grant any right or license for the personal and
noncommercial use of the guide or its content, except for a non-exclusive license to
consult it on an “as is” basis, at your own risk. All other rights are reserved.

Electrical equipment should be installed, operated, serviced and maintained only by

qualified personnel. No responsibility is assumed by Schneider Electric for any
consequences arising out of the use of this material.

As standards, specifications and designs change from time to time, please ask for
confirmation of the information given in this publication.

4 NHA71461-00
AccuSine PCS+ / PFV+ Installation Manual Contents

Chapter 1 Safety precautions ................................................................................................... 7

Chapter 2 Introduction .............................................................................................................. 9
Active Harmonic Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electronic VAR Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Chapter 3 Receiving, handling, and storing .......................................................................... 11
Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 4 Installation .............................................................................................................. 13
Foundation preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Physical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
40 A - 94 A Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
133 A - 235 A Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Attaching the Enclosure to the Floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Circuit Breaker and Manual Disconnect Selection . . . . . . . . . . . . . . . . . . . . . . 23
Power Cable Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Power and Ground Cable Selection and Connections . . . . . . . . . . . . . . . . . . . 24
Power Termination Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
40 A - 94 A Enclosure Internal Layout Drawing . . . . . . . . . . . . . . . . . . . . . 27
133 A - 235 A Enclosure Internal Layout Drawing . . . . . . . . . . . . . . . . . . . 28
Current Transformers (CTs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
General CT Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Minimum CT Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CT to CT Board Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
CT Installation Parallel Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Parallel Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Dry Contact Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Digital Input Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Modbus TCP/IP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Modbus Serial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Chapter 5 Pre-commissioning ................................................................................................ 45
Instruments required for commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Pre-energizing procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Installation Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Pre-Commissioning Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Commissioning procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Chapter 6 IT, HRG, and Corner Grounded Systems ............................................................. 47

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Contents AccuSine PCS+ / PFV+ Installation Manual

6 NHA71461-00
AccuSine PCS+ / PFV+ Installation Manual Chapter 1 - Safety precautions

Chapter 1 Safety precautions

Installation, wiring, testing and service must be performed in accordance with all local
and national electrical codes.

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices. See NFPA 70E in the USA, CSA Z462, or applicable local
standards.
• This equipment must be installed and serviced only by qualified electrical
personnel.
• Do not exceed the device’s ratings for maximum limits.
• Ground equipment using the ground connecting point provided before turning on
any power supplying this device.
• Turn off all power supplying this device and the equipment in which it is installed
before working on the device or equipment.
• After removing power, wait for 15 minutes to allow the capacitors to discharge prior
to opening the doors or removing covers.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
• Carefully inspect the interior for tools left behind before closing and sealing the
door.
Failure to follow these instructions will result in death or serious injury.

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8 NHA71461-00
AccuSine PCS+ / PFV+ Installation Manual Chapter 2 - Introduction

Chapter 2 Introduction
The product can be provided in either of two types, an Active Harmonic Filter (AHF) or
an Electronic VAR Control (EVC). Both types are to be installed as described in this
manual. These products are both referred to as an active filter in this manual.

Active Harmonic Filter

Active Harmonic Filters (AHF) are static power electronic products that employ digital
logic and IGBT semiconductors to synthesize a current waveform that is injected into
the electrical network to cancel harmonic currents caused by nonlinear loads. AHF
employ current transformers to measure the load current to determine the content of
harmonic current present. By injecting the synthesized current, network harmonic
currents are greatly mitigated, thus reducing the heating effects of harmonic current and
reducing voltage distortion.

AHF also have the ability to correct for poor displacement power factor (DPF) and for
mains current balancing. DPF correction can be provided for either leading (capacitive)
or lagging (inductive) loads that cause poor DPF. Mains current balancing is achieved
by measuring the negative sequence current present and injecting the inverse negative
sequence current to balance the current for the upstream network.

Electronic VAR Control

Electronic VAR control (EVC) are static power electronic products that employ digital
logic and IGBT semiconductors to synthesize a current waveform that is injected into
the electrical network to cancel load induced poor displacement power factor (DPF),
phase current unbalance, and flicker. DPF correction can be provided for either leading
(capacitive) or lagging (inductive) loads that cause poor DPF. Mains current balancing
is achieved by measuring the negative sequence current present and injecting the
inverse negative sequence currents to balance the current for the network. Flicker
control is provided by rapid detection and injection of reactive current (VARs) to prevent
the reactive current from over loading the network that causes rapid voltage deviations
identified as flicker.
EVC also have the ability to monitor the network voltage on which they are connected
and determine the proper amount of VARs to either raise the network voltage or lower
it. EVC will inject leading VARs to raise the voltage and lagging VARs to lower the
voltage. Entry of appropriate parameters will keep the network within its stated voltage
tolerance level.

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10 NHA71461-00
AccuSine PCS+ / PFV+ Installation Manual Chapter 3 - Receiving, handling, and storing

Chapter 3 Receiving, handling, and storing

Receiving
Inspect the active filter for any damage as soon as it is received. Transfer of the
equipment to a carrier at any manufacturing plant or other shipping point constitutes
delivery to the purchaser. Title and all risk of loss or damage in transit shall pass to the
purchaser at that time, regardless of freight payment.

Inspection
• Check that all packages and/or crates have been delivered and that the equipment
has not been damaged in transit.
• On the outside packaging and inside the unit, Tip N Tell and Drop N Tell monitoring
devices are installed. If these have been activated, inform the carrier immediately.

• In the event of damaged or missing items, contact the carrier immediately. Check
with them for time limits for filing claims and any documentation required such as a
Bill of Lading number, etc.
• Goods, whether sent freight pre-paid or not, are shipped at the consignee's risk.
• Damaged or missing items are the responsibility of the carrier and must be reported.
• Check that the information shown on the equipment nameplates corresponds with
the order specifications.
• The packaging material should be replaced to protect the unit until installation has
begun.

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Handling
WARNING
HAZARD OF PERSONAL INJURY
• Use proper lifting equipment such as an overhead crane to handle the active
filter.
• Do not lay the equipment on its front.
Failure to follow these instructions can result in death, serious injury, or
equipment damage.

Ensure that the proper equipment such as an overhead crane is available at the
installation site to handle the active filter. This equipment will help avoid injury to
personnel and damage to the active filter.

Verify the lifting capacity of the equipment being used to handle the active filter in
accordance with the shipping weight of each shipping section.

Storing
If the active filter is not to be installed when unpacked, it should be stored indoors in a
clean, dry place. The storage temperature must be between -20°C (-4°F) and 60°C
(140°F) with a maximum relative humidity of 85%, non-condensing, and a maximum
dewpoint of 37°C. It is preferable to store the unit in its original shipping container to
protect the unit from potential damage.

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AccuSine PCS+ / PFV+ Installation Manual Chapter 4 - Installation

Chapter 4 Installation
This chapter provides the information required to properly install the active filter and
associated equipment for proper operation and performance. Frequently,
commissioning difficulties are the result of incorrect wiring. Every precaution must be
taken to assure that the wiring is done as instructed. Read and understand all
instructions in this manual prior to installation.

Correct installation of the active filter is essential for proper operation of all components.
Study the associated instruction books and all drawings carefully.

The location chosen for installation should provide working clearances complying with
the appropriate section of the National Electrical Code® (NEC®), the Canadian
Electrical Code (CEC), or applicable local standards.

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices. See NFPA 70E in the USA, CSA Z462, or applicable local
standards.
• This equipment must be installed and serviced only by qualified electrical
personnel.
• Do not exceed the device’s ratings for maximum limits.
• Ground equipment using the ground connecting point provided before turning on
any power supplying this device.
• Turn off all power supplying this device and the equipment in which it is installed
before working on the device or equipment.
• Do not stand on any part of the active filter.
• After removing power, wait for 15 minutes to allow the capacitors to discharge prior
to opening the doors or removing covers.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
• Carefully inspect the interior for tools left behind before closing and sealing the
door.
Failure to follow these instructions will result in death or serious injury.

The following is a summary of the steps for installation:

1. Ensure that the line voltage is compatible with the voltage rating of the active filter.
2. Ensure the foundation is prepared for the active filter.
3. Ensure that environmental requirements are satisfied.
4. Refer to the dimensional drawings for the active filter to be installed.
5. Attach the enclosure to the floor.
6. Make the electrical connections.
7. Make the CT to CT board connection.
8. Set up parallel communication if applicable.

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Chapter 4 - Installation AccuSine PCS+ / PFV+ Installation Manual

9. When installing on Isolated Terra (IT), High Resistance Ground (HRG), or corner
grounded systems, ensure that the IT/BP switches are open. Refer to “IT, HRG, and
Corner Grounded Systems” on page 47.
10. Make the control wiring connections, but do not energize the active filter yet.

NOTE: Commissioning and energizing the active filter requires specialized knowledge.
Pre-commissioning procedures are covered in “Pre-commissioning” on page 45.
Commissioning procedures are covered in the User Manual. Energize and commission
the active filter only if you are qualified to do so.

Foundation preparation
The mounting location must be able to support the weight of the unit without sagging.
Weight specifications are provided in “UL Type 2, UL Type 12, IP31, and IP54
Enclosures Physical Specifications” on page 16.

Installation
For optimum performance in harmonic mitigation mode, adhere to the following
recommendations:
• All harmonic generating loads must have a minimum 3% line reactor or 3% DC
choke installed.
• SCR based rectifiers are required to have a minimum 3% line reactor.
• No capacitors downstream of the Main CTs.

NOTICE
RISK OF EQUIPMENT DAMAGE
Adhere to DC choke, SCR based rectifier, and capacitor placement requirements.
Failure to follow this instruction can result in equipment damage.

If these recommendations are not followed, the target harmonic level may not be met
and equipment damage can occur.

Environmental Requirements
Active filters are designed for indoor use only. They require unrestricted exchange of
environmental air to the inside of the enclosure for proper cooling. Ensure that the
environment meets Pollution Degree 2, i.e., does not contain conductive particles,
significant amounts of dust, or corrosive or otherwise harmful gases. Normally only
non-conductive pollution occurs. Temporary conductivity caused by condensation is to
be expected.

NOTICE
RISK OF EQUIPMENT DAMAGE
Ensure that the installation location satisfies environmental requirements.
Failure to follow this instruction can result in equipment damage.

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AccuSine PCS+ / PFV+ Installation Manual Chapter 4 - Installation

If environmental requirements are not adhered to, malfunction and possible destruction
of the active filter may occur.

The active filter generates significant heat during operation. Consult the product
specifications in “Electrical Specifications” on page 25 for the watt losses for each
active filter model. Ensure that the room where the active filter is mounted has adequate
ventilation. Maintain ambient temperature between 0°C (32°F) and 40°C (104°F) with a
maximum relative humidity of 95%, non-condensing, and a maximum dewpoint of
37°C.

The operating temperatures are maximum and minimum levels the unit is designed to
operate within. Operating above or below these levels will result in the unit either
shutting down or reduced performance. The upper or lower limit should not be used as
ideal room temperature levels. System reliability and product life expectancy will
improve if temperature levels are maintained between 20°C (68°F) and 30°C (86°F).

Physical Installation
Active filters can be enclosed in four kinds of enclosures and are referred to as UL Type
2, UL Type 12, IP31, and IP54. These enclosures are suitable for an indoor installation
only. The following table describes each type.

UL Type 2 UL Type 12
Enclosure Type
IP31 IP54
Enclosure provided Yes Yes
Standard Compliance: UL508 Yes Yes
Standard Compliance: IEC529 Yes Yes
Unrestricted air exchange, protection against contact with enclosed parts,
protection against limited amount of falling dirt, intake of dust, and harmful Yes Yes
particles
Yes Yes
Protection against foreign bodies of these diameters
>2.5 mm >1 mm
Complete protection against touch and protection against dust deposits No Yes
Protection against dripping water and external condensation of
Yes Yes
non-corrosive liquids
Protection against water from all directions No Yes

NOTE: This list indicates minimum requirements. Complete descriptions of the

requirements are provided in the standards referenced in this list.

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Chapter 4 - Installation AccuSine PCS+ / PFV+ Installation Manual

Physical Description
UL Type 2, UL Type 12, IP31, and IP54 Enclosures Physical Specifications
Operating Exterior Dimensions
Active filter Enclosure Weight Kg (lbs) Cable Entry Heat Load (Watts)
Temperature H x W x D mm (inches)
UL Type 2/IP31 483 (1062.6) 0° - 40°C 2,089 x 1300 x 550
40 A Top or Bottom 2107
UL Type 12/ IP54 494 (1086.8) (32° - 104°F) (82.24 x 51.18 x 21.65)
UL Type 2/IP31 460 (1012) 0° - 40°C 2,089 x 1300 x 550
47 A Top or Bottom 1807
UL Type 12/ IP54 471 (1036.2) (32° - 104°F) (82.24 x 51.18 x 21.65)
UL Type 2/IP31 533 (1172.6) 0° - 40°C 2,089 x 1300 x 550
80 A Top or Bottom 4503
UL Type 12/ IP54 542 (1192.4) (32° - 104°F) (82.24 x 51.18 x 21.65)
UL Type 2/IP31 498 (1095.6) 0° - 40°C 2,089 x 1300 x 550
94 A Top or Bottom 3903
UL Type 12/ IP54 507 (1115.4) (32° - 104°F) (82.24 x 51.18 x 21.65)
UL Type 2/IP31 708 (1557.6) 0° - 40°C 2091 x 1400 x 653
133 A Top or Bottom 8213
UL Type 12/ IP54 730 (1606.0) (32° - 104°F) (82.32 x 55.12 x 25.71)
UL Type 2/IP31 653 (1436.6) 0° - 40°C 2091 x 1400 x 653
157 A Top or Bottom 7213
UL Type 12/ IP54 675 (1485.0) (32° - 104°F) (82.32 x 55.12 x 25.71)
UL Type 2/IP31 826 (1817.2) 0° - 40°C 2091 x 1400 x 653
200 A Top or Bottom 11,398
UL Type 12/ IP54 839 (1845.8) (32° - 104°F) (82.32 x 55.12 x 25.71)
UL Type 2/IP31 757 (1665.4) 0° - 40°C 2091 x 1400 x 653
235 A Top or Bottom 9898
UL Type 12/ IP54 770 (1694.0) (32° - 104°F) (82.32 x 55.12 x 25.71)

NOTE:
• Weight information is approximate and subject to change without notice.
• Lifting lugs are provided for hoisting.

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AccuSine PCS+ / PFV+ Installation Manual Chapter 4 - Installation

Dimensional Drawings
Refer to the drawings on the following pages for active filter dimensions.

40 A - 94 A Drawings

40 A - 94 A Enclosure Dimensional Drawing

Lift here

Dimensions are shown in mm.

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Chapter 4 - Installation AccuSine PCS+ / PFV+ Installation Manual

40 A - 94 A Enclosure Top and Bottom Dimensional Drawing

AC line entry
top and bottom

50 x 50 Customer connections
top and bottom

Floor mount holes

Dimensions are shown in mm.

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AccuSine PCS+ / PFV+ Installation Manual Chapter 4 - Installation

133 A - 235 A Drawings

133 A - 235 A Enclosure Dimensional Drawing

Lift here

Dimensions are shown in mm.

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133 A - 235 A Enclosure Top and Bottom Dimensional Drawing

150 x 175 AC line entry

top and bottom
50 x 50 Customer connections
top and bottom

Dimensions are shown in mm.

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AccuSine PCS+ / PFV+ Installation Manual Chapter 4 - Installation

Attaching the Enclosure to the Floor

The unit must be securely attached to the floor where it is installed. There are eight
holes at the bottom of the plinth for securing the enclosure. Use M12 size hardware (not
included).

WARNING
RISK OF THE ENCLOSURE FALLING
Attach the equipment to the floor using the attachment points indicated below.
Failure to follow these instructions can result in death, serious injury or
equipment damage.

Floor Attachment Point Locations

Dimensions
Amperage Rating BD mm (inches) D mm (inches) BW mm (inches) W mm (inches)
40 A - 94 A 440 (17.32) 500 (19.69) 700 (27.55) 800 (31.50)
133 A - 235 A 540 (21.26) 600 (23.62) 800 (31.50) 900 (35.43)

Refer to the illustration and the table above for the dimensions and attachment
locations for the enclosure you are installing and follow these steps:

1. Ensure that the location is large enough for the enclosure.

2. Drill holes in the locations for the unit you are installing.
3. Position the equipment in its location.

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4. Remove the four plinth access covers at the front of the plinth by loosening the four
M6 screws using a T30 driver.

Plinth Access Covers

5. Secure the unit to the floor using mounting hardware.

6. Replace the front access covers and torque the screws to 5.7 N•m (50.4 Ib-in).

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AccuSine PCS+ / PFV+ Installation Manual Chapter 4 - Installation

Electrical Connection

Line Voltage
Refer to “Electrical Specifications” on page 25 to determine the line voltage that is
compatible with the voltage range of the active filter.

Circuit Breaker and Manual Disconnect Selection

A dedicated over-current protection device, circuit breaker, or fuse disconnect is
required for this product. The over-current protection device must be rated for at least
125% of the unit rating.

The active filter inrush current does not exceed the unit rating shown in the following
table. Circuit breaker settings such as Long Time Pickup, Long Time Delay, and Short
Time Pickup can be set for minimum inrush current.

Amperage Minimum Circuit Recommended Fuse / Circuit

Voltage Rating Minimum Circuit Breaker Size
Rating Ampacity Breaker Size
40 A 600-690 V 40 A 50 A 80 A
47 A 500-600 V 47 A 59 A 80 A
80 A 600-690 V 80 A 100 A 150 A (UL) / 160 A (IEC)
94 A 500-600 V 94 A 118 A 150 A (UL) / 160 A (IEC)
133 A 600-690 V 133 A 166 A 200 A
157 A 500-600 V 157 A 196 A 200 A
200 A 600-690 V 200 A 250 A 250 A
235 A 500-600 V 235 A 294 A 300 A

NOTE: Check national and local codes and regulations to ensure compliance.

Power Cable Routing

Power cables connected to the active filter must be placed in metal conduit or be
shielded encapsulated cables to reduce noise coupling (EMI). Entry for all power cables
has to be made through the removable gland plates on the bottom or top of the active
filter enclosure.

See “40 A - 94 A Enclosure Top and Bottom Dimensional Drawing” on page 18 and
“133 A - 235 A Enclosure Top and Bottom Dimensional Drawing” on page 20.

For all power systems, observe the following:

• Metal conduit or the encapsulated cable shield has to be grounded to the active filter
ground-terminal located adjacent to the power terminals.
• All panels must be installed to ensure proper system cooling.

NOTICE
RISK OF CONTAMINATION BY CONDUCTIVE MATERIAL OR DEBRIS
Remove conduit entry gland plates to drill cable entry holes.
Failure to follow this instruction can result in equipment damage.

The active filter warranty is void if operational difficulties are found to be caused by
metal particles from the installation process.

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Power and Ground Cable Selection and Connections

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
Ground equipment using the ground connecting point provided before turning on any
power supplying this device.
Failure to follow these instructions will result in death or serious injury.

All power wiring has to be routed directly from the conduit entry plate to the terminations
on power terminals (and the earth grounding terminal) without loops. Instrumentation
and CT wiring has to be routed in a separate grounded metal conduit or shielded
encapsulated cable. A dedicated ground conductor must be used when installing the
active filter.

When used as a harmonic current compensation device, the active filter produces
currents at frequencies that are multiples of the AC line fundamental frequency. Power
cables as well as input disconnect devices should be rated at 125% of the active filter
rated current. This helps avoid excessive heating from any skin effect resistance
increase at these higher frequencies.

NOTE: Check national and local codes and regulations to ensure compliance.
M8 power and ground studs are provided for the 40 A, 47 A, 80 A, and 94 A rated units.
M12 power and M8 ground studs are provided for the 133 A, 157 A, 200 A, and 235 A
units. The bus bar for power connection has two studs that can accept either a two-hole
crimp lug or a two-hole box lug. The bus bar studs are 25.4 mm (1 in) apart
center-to-center. See “40 A - 94 A Enclosure Internal Layout Drawing” on page 27 and
“133 A - 235 A Enclosure Internal Layout Drawing” on page 28 for details.

Box lug accessory kits are available as an option in the catalog. The box lugs are UL
compliant. Each kit contains three box lugs for the phase connection and one box lug
for the ground connection. When installing 133 A to 235 A units, two box lug kits are
required per unit if two conductors per phase are used.

The box lugs in the optional accessory kit are not IEC compliant. For IEC installation,
use crimp-on ring lugs for electrical connections.

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Electrical Specifications
Power Ground
Total Voltage Wire Max. No.
Intake Air Connection Stud Connection Stud
Active Filter Current Range Frequency Hz Temperature Conductors
Temperature Size and Torque Size and Torque
Amperes Volts Rating Per Phase
N•m (lb-in) ± 5% N•m (lb-in) ± 5%
40 A
Enclosures 50 or 60 Hz 0° - 40°C M8 stud - 18.2 M8 stud - 18.2
40 600 - 690 60°C, 75°C, 90°C 1
N12, IP30, ±3 Hz (32° - 104°F) (161.1) (161.1)
and IP54
47 A
Enclosures 50 or 60 Hz 0° - 40°C M8 stud - 18.2 M8 stud - 18.2
47 500 - 600 60°C, 75°C, 90°C 1
N12, IP30, ±3 Hz (32° - 104°F) (161.1) (161.1)
and IP54
80 A
Enclosures 50 or 60 Hz 0° - 40°C M8 stud - 18.2 M8 stud - 18.2
80 600 - 690 75°C, 90°C 1
N12, IP30, ±3 Hz (32° - 104°F) (161.1) (161.1)
and IP54
94 A
Enclosures 50 or 60 Hz 0° - 40°C M8 stud - 18.2 M8 stud - 18.2
94 500 - 600 75°C, 90°C 1
N12, IP30, ±3 Hz (32° - 104°F) (161.1) (161.1)
and IP54
133 A
Enclosure 50 or 60 Hz 0° - 40°C M12 stud - 37.0 M8 stud - 18.2
133 600 - 690 75°C, 90°C 2
Type N1 and ±3 Hz (32° - 104°F) (327.5) (161.1)
Chassis
157 A
Enclosure 50 or 60 Hz 0° - 40°C M12 stud - 37.0 M8 stud - 18.2
157 500 - 600 75°C, 90°C 2
Type N1 and ±3 Hz (32° - 104°F) (327.5) (161.1)
Chassis
200 A
Enclosures 50 or 60 Hz 0° - 40°C M12 stud - 37.0 M8 stud - 18.2
200 600 - 690 75°C, 90°C 2
N12, IP30, ±3 Hz (32° - 104°F) (327.5) (161.1)
and IP54
235 A
Enclosures 50 or 60 Hz 0° - 40°C M12 stud - 37.0 M8 stud - 18.2
235 500 - 600 75°C, 90°C 2
N12, IP30, ±3 Hz (32° - 104°F) (327.5) (161.1)
and IP54

NOTE:
• Check national and local codes and regulations to ensure compliance.
• The active filter generates significant heat during operation. Ensure that the room
where the active filter is located has adequate ventilation to maintain intake air
temperature within the specified operating range.

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Power Termination Covers

Customer Access Cover

T20 driver

26 NHA71461-00
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40 A - 94 A Enclosure Internal Layout Drawing

M8 Busbar Studs

Power termination

M8 Ground Stud

M8 Ground Stud

CT and logic termination

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Chapter 4 - Installation AccuSine PCS+ / PFV+ Installation Manual

133 A - 235 A Enclosure Internal Layout Drawing

M12 Busbar Studs

Power termination

M8 Ground Stud

M8 Ground Stud

CT and logic termination

28 NHA71461-00
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Current Transformers (CTs)

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Never open circuit a current transformer (CT).
• Always use grounded external CTs for current inputs.
Failure to follow these instructions will result in death or serious injury.

Ensure that CT secondary current is not present when wiring the CT secondary
connections. The shorting jumpers must be installed at the X1 to X2 OUT of each CT
channel on the CT board unless you are connecting an additional Master parallel unit.
Refer to “Source Side CT Position Diagram” on page 34.

General CT Information
The CT must be orientated properly during installation. The orientation is specified in
the drawings with an arrow indicating the direction or polarity of the CT. Most CT
manufacturers will indicate orientation with a label indicating H1 on one side of the CT
or a dot. There can also be a label indicating H2 and/or an arrow on the CT. The H1
side of the CT should always be closest to the power source. If the CT has an
orientation arrow, it should point from the source towards the load. See the installation
instructions for the specific CTs being installed.

A shorting terminal block or shorting switch with galvanic isolation to the active filter for
the CT secondary is required. Insert an interposing terminal block in a separate
enclosure with the ability to short the secondary wiring of the CT. This provides the
ability to short the CT without entering the active filter enclosure (which otherwise would
require a power shutdown). Shorting terminal blocks are available in the catalog.

CT location is defined in relationship to the active filter system. CT location on the

“Source Side” indicates that the CTs are physically located upstream of the active filter.
The CTs will measure the improvement to the current as a result of the active filter
operating. A CT location on the “Load Side” indicates that the CTs are downstream of
the active filter. The CTs will monitor the Load current provided by both the source and
active filter currents.

Two CTs are required to be installed, one on L1 phase and one on L2 phase of the
conductors powering the loads to be compensated by the active filter system. If there
are any line-to-neutral connected loads downstream of the active filter system's main
CTs, a third CT is required on L3 phase.

NOTICE
MEASUREMENT ERRORS
CTs must be physically separated from any perpendicular conductor by at least 25
mm (1 inch) for every 1000 A of current flowing through the perpendicular conductor.
Failure to follow this instruction can result in a reduction in performance of the
active filter.

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If this practice is not followed, the magnetic field produced by the current flowing on the
perpendicular conductor will cause CT measurement errors.

Minimum CT Requirements
The active filter uses a minimum of two external current transformers (CTs) to measure
load current waveforms. Standard CTs rated for 50/60 Hz or 400 Hz with Type 1
accuracy rating, with a 5 A or 1 A secondary are acceptable. The largest primary rating
for the CT is 10,000 A. Any splicing to the CT leads needs to be done with crimp style
connectors or soldered.

The CT should be mounted on phases L1 and L2 with the orientation arrow pointing
toward the load. Systems that are using two CTs can have the CTs installed on L1 and
L3 or L2 and L3 if necessary. If L1 and L3 or, L2 and L3 CT configurations are used,
this information must be provided to the qualified person commissioning the unit. Three
external CTs are required if line-to-neutral connected loads are present.

NOTICE
REDUCED PERFORMANCE
CT wiring must be routed separately from power cables.
Failure to follow this instruction can result in a reduction in performance.

CT wiring must be routed directly from the conduit entry-plate to the terminal block of
the CT board.

CT must be selected for:

• 5 A or 1 A secondary
• 250 A to 10,000 A primary rating
• 50/60 Hz or 400 Hz Rated
• Type 1 accuracy
• The CT primary current rating, which must exceed the maximum load current where
they are installed.
• The maximum burden (in VA) on the CT is formed by the CT wiring and total active
filter burden. This is equal to 1.0 VA for CTs with a 5 A secondary rating or 0.04 VA
for CTs with a 1 A secondary rating.
• Wire size of the CT should be 4mm2 (12 AWG) or 6mm2 (10 AWG). Consult the CT
manufacturer for secondary wiring recommendations. See “5 A Secondary
Maximum Wire Length” and “1 A Secondary Maximum Wire Length” on page 33 for
adding wire to CT secondary wiring.
CT secondary wiring must be either twisted and/or shielded pairs

Do not connect the active filter CT to any other loads. Use a separate current
transformer if additional uses are required.

Any splicing to the CT leads needs to be done with crimp style connectors or soldered.
X2 of each CT installed must be grounded as close to the CT as possible.

A single active filter, not operating in parallel, can have the CTs installed either on the
source side or load side of the active filter. Parallel systems must have the main CTs
installed on the source side of the active filter system.

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CT to CT Board Connection
The CT connection is made behind the small customer access panel at the bottom of
the active filter chassis. Remove the customer access panel. The CT board is located
behind and slightly below the control board. This is the location where the active filter
CT secondary wiring must be terminated. Remove the clear plastic safety cover to
access the CT board.

Typically, L1 CT will be connected to CH1 IN. There are two X1 and X2 IN terminals.
The second set of IN terminals can be used to connect additional CTs that may be
required for site specific conditions. X1 and X2 OUT are used for parallel active filter
systems.

The terminal block on the CT board can accept wire sizes of up to 6 mm2 (10 AWG)
wire and has a torque specification of 1 N•m (9 Ib-in).

NOTICE
CIRCULATING CURRENTS
When using shielded CT secondary wire, ground the shield in only one location.
Failure to follow this instruction can result in a reduction in performance.

NOTICE
INACCURATE FILTER OPERATION
Do not allow the conductor on which the CT is mounted to become lodged in the joint
area of a split-core CT.
Failure to follow this instruction can result in inaccurate filter operation.

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Control Board and CT Board Detail

Control Board

CT Board

32 NHA71461-00
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5 A Secondary Maximum Wire Length

Maximum wire length from active filter to CT in meters (feet)
CTs burden capacity with 5 A Secondary 4 mm2 6 mm2
(12 AWG) (10 AWG)
5 VA 7 (24) 12 (41)
15 VA 38 (124) 63 (208)
25 VA 68 (224) 114 (375)
30 VA 83 (273) 139 (457)
35 VA 99 (324) 165 (541)
45 VA 129 (423) 216 (708)

1 A Secondary Maximum Wire Length

Maximum wire length from active filter to CT in meters (feet)
CTs burden capacity with 1 A Secondary 4 mm2 6 mm2
(12 AWG) (10 AWG)
5 VA 373 (1223) 623 (2043)
15 VA 1135 (3724) 1895 (6215)
25 VA 1897 (6223) 3167 (10,387)
30 VA 2278 (7473) 3804 (12,477)
35 VA 2660 (7412) 4440 (14,563)
45 VA 3422 (11,224) 5712 (18,735)

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Chapter 4 - Installation

Source Load
L1
X1

L2
X1

L3
X1
3-phase Protection
Device
Customer supplied.
X2
X1 X1 X2
Optional 3rd CT
Required if there are Line-to-
Neutral connected Loads X2 L1 L2 L3
downstream of the CTs.
X1
Active Filter
Shorting CH1 CH2 CH3
Source Side CT Position Diagram

Terminal IN OUT IN OUT IN OUT

Block
X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2
Customer
supplied.
(CTs installed on the “Source Side” or upstream of the active filter)

NOTE: The factory installed shorting jumpers must be installed.

Factory Installed
shorting jumpers

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AccuSine PCS+ / PFV+ Installation Manual Chapter 4 - Installation

Load Side CT Position Diagram

Source Load

L1
X1

L2
X1

L3
X1
3-phase Protection
Device X2 X1
X1 X2
Customer supplied. Optional 3rd CT
Required if there are Line-to-
X2 Neutral connected Loads
X1 downstream of the CTs.
L1 L2 L3

Active Filter Shorting

Terminal
CH1 CH2 CH3 Block
Customer
IN OUT IN OUT IN OUT
supplied.
X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2

Factory Installed
shorting jumpers

NOTE: The factory installed shorting jumpers must be installed.

Parallel System
Up to ten active filters can be installed in parallel. If more than ten units in parallel are
required, contact the local sales representative for assistance prior to installation.

CT Installation Parallel Units

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
The factory provided shorting jumpers must be installed at the OUT of the CT board
of the last unit with CT secondary wiring connected.
Failure to follow these instructions will result in death or serious injury.

The active filters can be set up to be either Master or Slave. To be a candidate as a

Master, the unit must be provided with CT secondary wiring to the CT board. See
“Control Board and CT Board Detail” on page 43. There is no limit to the number of units
that can be set up as a Master candidate. At least two units should be capable of being
the Master in any parallel installation.

The main CTs must be installed on the source side of the active filter system. Examples
of CT secondary wiring can be seen on the following pages in this section. Refer to
“Circuit Breaker and Manual Disconnect Selection” on page 23 for information on circuit
breaker and fuses required.

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Chapter 4 - Installation

Source
Load
L1
X1

L2
X1

L3

X1
3-phase Protection
Device
X1 Customer supplied.
X2

X1 X2

L1 L2 L3 MASTER L1 L2 L3 MASTER
X1
X2

Active Filter Active Filter

CH1 CH2 CH3 CH1 CH2 CH3
Shorting
Terminal IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT
Block X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2
Customer
supplied.

Factory Installed
shorting jumpers
Source Side CT Position Parallel Units Diagram

Optional 3rd CT
Required if there are Line-to-
Neutral connected Loads
downstream of the CTs.

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NHA71461-00
Source
Load

L1
X1
AccuSine PCS+ / PFV+ Installation Manual

L2
X1

L3
X1
3-phase Protection 3-phase Protection
Device Device
Customer supplied. Customer supplied.

MASTER MASTER MASTER

L1 L2 L3 L1 L2 L3 L1 L2 L3
Shorting
Terminal
Block Active Filter Active Filter Active Filter
Customer
CH1 CH2 CH3 CH1 CH2 CH3 CH1 CH2 CH3
supplied.
IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT
X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2
CT Wiring for 3 Masters

Factory Installed
shorting jumpers

Optional 3rd CT
Required if there are Line-to-
Neutral connected Loads
downstream of the CTs.
Chapter 4 - Installation

37
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Chapter 4 - Installation

Source
Load

L1
X1

L2
X1

L3
X1
3-phase Protection 3-phase Protection
Device Device
Customer supplied. Customer supplied.

MASTER MASTER Slave

L1 L2 L3 L1 L2 L3 L1 L2 L3
Shorting
Terminal
Block Active Filter Active Filter Active Filter
Customer
supplied. CH1 CH2 CH3 CH1 CH2 CH3 CH1 CH2 CH3
IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT
X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2

Factory Installed
CT wiring for 2 Masters and 1 Slave

shorting jumpers

Optional 3rd CT
Required if there are Line-to-
Neutral connected Loads
downstream of the CTs.

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NHA71461-00
Source Load
L1
X1
AccuSine PCS+ / PFV+ Installation Manual

L2
X1

L3
X1
3-phase Protection
Device
Customer supplied

MASTER L3
MASTER L3 L1 L2 L3 L3 L1 L2 L3
Shorting L1 L2 L1 L2 L1 L2
Terminal
Block Active Filter Active Filter Active Filter Active Filter Active Filter
Customer
supplied CH1 CH2 CH3 CH1 CH2 CH3 SLAVE SLAVE SLAVE
IN OUT IN OUT IN OUT IN OUT IN OUT IN OUT
X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2 X1 X2

Factory Installed
shorting jumpers
CT wiring for 2 Masters and 3 Slaves

Optional 3rd CT
Required if there are Line-to-
Neutral connected Loads
downstream of the CTs.
Chapter 4 - Installation

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Chapter 4 - Installation AccuSine PCS+ / PFV+ Installation Manual

Parallel Communication
For parallel operation, the units communicate through the RJ-45 connectors labeled 1P
and 2P on the Control Board. This is a unique communication protocol that is only to be
used for parallel communication. The 2P jack has an RJ-45 termination plug installed
at the factory.

NOTICE
EXCESSIVE NOISE IN THE COMMUNICATION CIRCUIT
When the unit is set to operate in parallel mode, the termination plug must be
installed in any RJ-45 jacks that are not used for parallel communication wiring. See
the wiring diagrams in this section.
Failure to follow this instruction can result in communication errors.

CAT5e cable with all 8 conductors terminated at the RJ-45 connections is required for
parallel communication. It is recommended that shielded Cat5e cable be used. Ensure
that the total cable length does not exceed 76 meters (250 feet). The CAT5e cable with
RJ-45 plugs can be purchased as an option. Refer to the catalog for optional paralleling
cable part numbers.

Control Board and CT Board Detail

1P and 2P

40 NHA71461-00
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2 Unit Parallel Communication Wiring Diagram

Active Filter Active Filter

Control Board Control Board

1P 2P 1P 2P
(RJ45) (RJ45) (RJ45) (RJ45)

Factory Factory
Provided RJ45 Provided RJ45
Terminator Terminator
(Shielded) CAT5e cable with RJ45 connectors

4 Unit Parallel Communication Wiring Diagram

Active Filter Active Filter Active Filter Active Filter

Control Board Control Board Control Board Control Board

1P 2P 1P 2P 1P 2P 1P 2P
(RJ45) (RJ45) (RJ45) (RJ45) (RJ45) (RJ45) (RJ45) (RJ45)

Factory Factory
Provided RJ45 Provided RJ45
Terminator Terminator

(Shielded) CAT5e cable with RJ45 connectors

Control Wiring

Dry Contact Output

Four dry Contact outputs are available at J2 of the Control Board. See “Control Board
and CT Board Detail” on page 43. One common and four switchable outputs are
available labeled Q1 to Q4. The four outputs can be programmed to change states on
different conditions by the HMI and be set to either normally open or normally closed.
See the User Manual for setting the output contacts. Maximum voltage accepted is 250
V AC or 30 V DC with a 1 A maximum current.

Digital Input Control

Four input controls are available at J2 of the Control Board. See “Control Board and CT
Board Detail” on page 43. One Ground and four inputs labeled I1 to I4. The inputs are
at 5 V DC and are grounded to activate. The control function can be programmed by
the HMI. See the User Manual for setting the functionality of the input control.

Modbus TCP/IP
Modbus TCP/IP monitoring is available at the RJ-45 jack to the right of the Control
Board labeled ETH. Refer to “Control Board and CT Board Detail” on page 43. Modbus
addresses are provided in the User Manual.

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Modbus Serial
A serial Modbus connection is available through an RJ-45 jack labeled MBS on the
control board. Refer to “Control Board and CT Board Detail” on page 43. Modbus
addresses are provided in the User Manual.

Serial Modbus Pin-out

Pin Signal Name Direction Meaning

1 Not connected -
2 Not connected -
3 Not connected -
4 D1 Input/Output Transfer data (RS-485)
5 D0 Input/Output Transfer data (RS-485)
6 Not connected -
7 Not connected -
8 SG - Signal ground

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Control Board and CT Board Detail

J2

Control Board J2 Detail

Control Board

Com Q1 Q2 Q3 Q4 GND I1 I2 I3 I4

Dry Contact Output Digital Input Control

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44 NHA71461-00
AccuSine PCS+ / PFV+ Installation Manual Chapter 5 - Pre-commissioning

Chapter 5 Pre-commissioning
This chapter provides information for preparation of the active filter for commissioning.
Before applying power, read and understand this information thoroughly.

Instruments required for commissioning

• Voltmeter or multimeter
• Clamp-on ammeter
• Megohmmeter

Pre-energizing procedure
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices. See NFPA 70E in the USA, CSA Z462, or applicable local
standards.
• This equipment must be installed and serviced only by qualified electrical
personnel.
• Do not exceed the device’s ratings for maximum limits.
• Ground equipment using the ground connecting point provided before turning on
any power supplying this device.
• Turn off all power supplying this device and the equipment in which it is installed
before working on the device or equipment.
• After removing power, wait for 15 minutes to allow the capacitors to discharge prior
to opening the doors or removing covers.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
• Carefully inspect the interior for tools left behind before closing and sealing the
door.
Failure to follow these instructions will result in death or serious injury.

Installation Inspection
Inspect all connections for both power and control wiring. Ensure that the correct
termination points have been made for each wire. Ensure that all connections are firmly
tightened prior to start-up.

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Pre-Commissioning Checklist

Prior to commissioning the active filter system, the following items must be completed:
• Electrical connections have been made in accordance with local codes.
• Main CTs are installed to measure the current of the system to be corrected.
• The secondary wiring of the main CTs have been connected to the CT board of the
active filter.
• If it is a parallel active filter system, CT wiring and parallel communications wiring
have been installed between the CT boards of each unit.
• All drives, harmonic generating loads, downstream of the main CTs must have the
recommended minimum 3% line reactor or DC choke installed (required for optimum
performance when harmonic mode is intended).
• There are no un-isolated capacitors, such as power factor correction capacitors
downstream of the main CTs. (required when harmonic mode is intended to
operate).
• At least 50% of the anticipated load should be available during the commissioning
procedure. To fully test the system integration, all loads supported by the active filter
system should be available for operation. The total output current required for the
system must be at least 10% of the unit's nameplate rating. For example, a 300 A
unit will need a minimum of 30 A Total Output current.
• If backup generation is connected to the active filter, the system should also be
tested with the generator supporting the connected loads.
The Field Service Engineer will need to know the following information to commission
the active filter:
• Installation location of the main CTs in relationship to the active filter (load or grid).
• The ratio of the main CTs installed.
• The phase on which each CT is installed.
• Intended mode of operation (Harmonic, Power Factor, Load Balancing).

Commissioning procedures
Refer to the User Manual for commissioning procedures. The User Manual is available
as a download from our website.

46 NHA71461-00
AccuSine PCS+ / PFV+ Installation Manual Chapter 6 - IT, HRG, and Corner Grounded Systems

Chapter 6 IT, HRG, and Corner Grounded

Systems
This chapter provides information on using the active filter with Isolated Terra (IT), High
Resistance Ground (HRG), and corner grounded systems.

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices. See NFPA 70E in the USA, CSA Z462, or applicable local
standards.
• This equipment must be installed and serviced only by qualified electrical
personnel.
• Do not exceed the device’s ratings for maximum limits.
• Ground equipment using the ground connecting point provided before turning on
any power supplying this device.
• Turn off all power supplying this device and the equipment in which it is installed
before working on the device or equipment.
• After removing power, wait for 15 minutes to allow the capacitors to discharge prior
to opening the doors or removing covers.
• Always use a properly rated voltage sensing device to confirm power is off.
• Replace all devices, doors, and covers before turning on power to this equipment.
• Carefully inspect the interior for tools left behind before closing and sealing the
door.
Failure to follow these instructions will result in death or serious injury.

NOTICE
HAZARD OF EQUIPMENT DAMAGE
Open the IT/BP switches before operating the unit on an IT, HRG, or corner
grounded system.
Failure to follow these instructions can result in equipment damage.

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When connecting the active filter to an IT, HRG, or corner grounded system, open the
IT/BP switches as follows:

1. Remove the large main cover of the unit.

Main Cover Removal

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AccuSine PCS+ / PFV+ Installation Manual Chapter 6 - IT, HRG, and Corner Grounded Systems

2. Locate the IT/BP switches.

IT/BP Switch Locations on 40-94 A Units

IT/BP switches

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IT/BP Switch Locations on 133-235 A Units

IT/BP switches

3. Pull the plunger out.

The switch is open when the plunger is completely out as shown here.

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