LV-ACB - Low Voltage Automatic Capacitor Banks

Low Voltage Automatic Capacitor Banksfor Improving Power Factor, ReducingTransformer Loads and Power FactorPenalties

NEPSIs low voltage automatic capacitorbanks are designed for industrial andcommercial power systems requiring a singlepoint source of power factor correction at thelow voltage level.

Product Benefits

Automatically controlled power factor

regulation.

System wide correction with a single

piece of equipment.

Low installation cost.Figure 1 - Typical Inside and Outside View

of LV-ACBTM

Product Features

System is designed with Aerovox 3-terminal ICS capacitors and are rated for conversion to a

harmonic filter.

Compact modular design with provisions for future expansion in the field.

Programmable digital power factor controller with control up to 15 steps.

Standard reactive power ratings from 150 kvar to 1000 kvar at 480 and 600 volts (75 kvar to 300

kvar at 240 volts). Higher ratings available upon request.

Indoor/Outdoor Design as standard

Automatic C/K Calibration

UL Listed as Industrial Control Panel (508A)

Multi-Ratio Split-Core Current Transformer Supplied as standard.

Short lead times.

Application

NEPSIs low voltage automatic capacitor banks are designed for low voltage systems requiring automatic

power factor correction, reduced system capacity, and improved voltage regulation. The simple modulardesign allows for future expansion as plant loads increase. The capacitors and system topology is designedfor direct conversion into harmonic filters, if the need should ever arise. Installation and startup is simpleand free of common problems.

Specification

NEPSIs low voltage automatic capacitor banks are designed to endure the harsh electrical andenvironmental conditions that are typically found in industrial process facilities.

Enclosure

NEPSIs automatic capacitor banks are housed in an enclosure with NEMA 1 construction (3R can beprovided as an option) and is suitably supported, constructed, and assembled to meet the strength and

rigidity requirements given in ANSI/IEEE C37 and UL Standards. All fastening hardware inside and out isstainless steel. To maximize corrosion resistance, the outside of the enclosure is coated with an ANSI 61light gray marine epoxy finish.

The front of the enclosure is equipped with a hinged door for easy access. The doors are mounted on

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stainless steel hinges and are held shut with 3-point latching handles. The handles are stainless steel and arelockable.

Capacitor supports and enclosure base consists of welded C4 structural steel channel. Four removablelifting eyes are provided.

CapacitorsThe capacitor bank consists of UL Listed, low loss, three bushing, industrial rated, metallized electrode,self-healing capacitors with integral discharge resistors mounted in a single steel tank. The capacitors arefinished with a UL listed ANSI #61 light-gray finish and meet or exceed the latest applicable ANSI andIEEE standards.

The capacitors have a proven 20-year (continuous duty) life expectancy. The capacitors steel case iswelded and hermetically sealed with an internal pressure interrupter, virtually eliminating the possibility ofcase rupture.

The capacitors are designed for harmonic filter bank duty and can be utilized in a harmonic filter bankretrofit, if required.

Discharge Resistors: Each capacitor cell incorporates internal discharge resistors designed to reduce thecapacitor voltage to 50 volts or less within one minute after removal from the circuit.

Environmental Parameters: Capacitors are designed to operate between

-40C and +46C (-40F to +115F).

Contactors

Each step of the LV-ACB is switched with a NEMA rated 600 Volt contactor that is UL listed for

capacitor switching. The contacts, coils, and auxiliary contacts can be changed without disturbing othercomponents within the bank.

Power Factor Controller

The LV-ACB is controlled by a digital power controller with the following features:

Automatic self adjustment to any capacitor step value

Digital indication of power factor, preset parameters and specified installation data

No-Volt release feature to immediately disconnect all capacitors in the event of a power failure.

Facility to connect mini-printer

Plug-in terminal connection

Automatic elimination of defective capacitor steps, and their indication (i.e. Welded contacts, failed

capacitor, etc.)

Visual display of target power factor alarm

Visual display of harmonic overload alarm

Protection

NEPSIs capacitor banks are equipped with overload and short circuit protection. Protection features are as

follows:

Fusing: Each stage is protected from overloads (resulting from resonance) and faults by 600 volt 200,000AIC (amps interrupting current), UL rated, bus mounted fuses. Fuses are located on the line side of the

capacitors and contactors.

Blown Fuse Lights: Each fuse is equipped with a blown fuse light that indicates a fuse operation. Lights

are mounted on the outside of the enclosure.

Warranty

12 month system warranty

Optional Accessories

Main Disconnecting Devices: (MC___) or (FD___) NEPSIs automatic capacitor banks may beequipped with either a main disconnect, main fusible disconnect, or a molded case circuit breaker that

is externally operated through a rotary handle.

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On/Off/Auto Switches: (H) On/Off/Auto Switches may be added to NEPSIs standard automatic banks toprovide complete individual control of each capacitor bank stage.

Dust Proofing: (D) Can be provided where location require filtering over louvers.

Cooling Fan: (CF) A cooling fan can be provided that increases the cooling when installed in places where

accessive heat may cause problems. Not recommended if ambient temperature does not exceed 90oF.

Out of KVAR Alarm: (KA or KL) An out of kvar alarm can be provide to give visual and/or audibleindication of not having the capability to meet the target power factor.

Ammeter: (A) A three-phase ammeter can be provided to show the operating current of each filter bankstage.

Voltmeters: (V) A three-phase voltmeter can be provided to show the system voltage.

Keyed Interlock System: (KK) A keyed interlock system can be provided that will prevent access into thecapacitor bank until the bank has been shut down by an upstream disconnecting device.

Outdoor Rating: (O) The enclosure and control panel can be designed for outdoor application.

240 Volt Automatic Capacitor Bank Selection Chart

BANK RATED SHIPPINGRATING STEP X MODEL CURRENT WEIGHT

(KVAR) KVAR NUMBER (AMPS) (POUNDS)

75 3 X 25 75LVA240F2B 181 800

100 4 X 25 100LVA240F2B 241 870

125 5 X 25 125LVA240F2B 301 940

150 6 X 25 150LVA240F2B 361 1005

200 8 X 25 200LVA240F2B 482 1140

250 10 X 25 250LVA240F2B 602 1275

300 6 X 50 300LVA240F2B 723 1410

Consult the factory or your sales representative for capacitor bank kvar ratings greater

than those or different than those shown in the table above.

480 & 600 Volt Automatic Capacitor Bank Selection Chart

BANK RATED RATED SHIPPING

RATING STEP X 480 VOLT CURRENT 600 VOLT CURRENT WEIGHT(KVAR) KVAR MODEL NUMBER (AMPS) MODEL NUMBER (AMPS) (POUNDS)

150 3 X 50 150LVA480F2B 181 150LVA600F2B 145 825

200 4 X 50 200LVA480F2B 241 200LVA600F2B 193 900

250 5 X 50 250LVA480F2B 301 250LVA600F2B 241 975

300 3 X 100 300LVA480F2B100 361 300LVA600F2B100 289 1050

300 6 X 50 300LVA480F2B 361 300LVA600F2B 289 1100

350 7 X 50 350LVA480F2B 421 350LVA600F2B 337 1125

400 4 X 100 400LVA480F2B100 482 400LVA480F2B100 385 1200

400 8 X 50 400LVA480F2B 482 400LVA600F2B 385 1250

450 9 X 50 450LVA480F2B 542 450LVA600F2B 433 1275

500 5 X 100 500LVA480F2B100 602 500LVA600F2B100 482 1350

500 10 X 50 500LVA480F2B 602 500LVA600F2B 482 1350550 11 X 50 550LVA480F2B 662 550LVA600F2B 530 1425

600 6 X 100 600LVA480F2B100 723 600LVA600F2B100 578 1500600 12 X 50 600LVA480F2B 723 600LVA600F2B 578 1550

650 13 X 50 650LVA480F2B 783 650LVA600F2B 626 1575700 7 X 100 700LVA480F2B100 843 700LVA600F2B100 674 1650

700 14 X 50 700LVA480F2B 843 700LVA600F2B 674 1700750 15 X 50 750LVA480F2B 903 750LVA600F2B 723 1725

800 8 X 100 800LVA480F2B100 963 800LVA600F2B100 771 1800800 16 X 50 800LVA480F2B 963 800LVA600F2B 771 1835

850 17 X 50 850LVA480F2B 1020 850LVA600F2B 819 1855

900 9 X 100 900LVA480F2B100 1080 900LVA600F2B100 867 1875

900 18 X 50 900LVA480F2B 1080 900LVA600F2B 867 1910

950 19 X 50 950LVA480F2B 1140 950LVA600F2B 914 1950

1000 10 X 1000 1000LVA480F2B100 1200 1000LVA600F2B100 963 1975

Consult the factory or your sales representative for capacitor bank kvar ratings greater than those ordifferent than those shown in the table above.

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Automatic Capacitor Bank Accessories

AccessoryDESCRIPTION Code

ADDITIONAL CURRENTTRANSFORMER

CT

MOLDED CASE/INSULATED CASECIRCUIT BREAKERS

250 AMP MC250

400 AMP MC400

600 AMP MC600800 AMP MC800

1000 AMP MC1000

1200 AMP MC1200

1600 AMP MC16002000 AMP MC2000

FUSED DISCONNECT SWITCH200 AMP FD200

400 AMP FD400

600 AMP FD600

800 AMP FD800

ON/OFF/AUTO SWITCHES H

OUT OF KVAR LIGHT KL

OUT OF KVAR ALARM KA

AMMETER A

VOLTMETER V

DUST PROOFING D

COOLING FAN CF

HF REACTOR RETROFIT (ADD 6 TO

WIDTH DIMENSION)

RR

KEY INTERLOCK KK

OUTDOOR RATING O

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Three-line diagram of typical low voltage automatic capacitor bank. Capacitors, transient inrush reactors,

control power transformer, contactors, 3 phase fusing, current transformer placement and incoming breaker

are shown.

Northeast Power Systems, Inc.

66 Carey Road

Queensbury, New York 12804Phone: 518-792-4776

Fax: 518-792-5767

Email: sales@nepsi.com

Website: www.nepsi.com

Copyright 1999 - 2009 Northeast Power Systems, Inc.

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