AUTOMATICALLY SWITCHED, LOW-VOLTAGE EQUIPMENT

The NRG/Merrimac Accuvar-Plus multi-step power factor control
equipment automatically maintains desired power factor level,
adjusting to system load requirements in selected KVAR steps. The
solid-state controller responds to a current signal from the optional
current transformer and to voltage signal from a potential transformer
included in the equipment.

The Equipment features capacitors with a metallized dielectric system
providing a self heating action reducing energy losses. The
biodegradable impregnant is a class IIIB combustible fluid. Discharge
resistors reduce the voltage to 50 volts or less with one minute of de-
energization.

The power factor controller uses a Current Transformer (CT) signal for
operation. The CT primary is sized for the total phase current to be
compensated (capacitor current and load current). Typically, the total
phase current should be 50% to 80% of the CT primary rating. The CT
secondary is rated 5A. Our highly experienced application engineers
are available to assist with your operational applications.

 

Standard Equipment Features

✓  Correction to unity power factor, if desired
✓  UL and cUL listed
  NEMA 1, or 3R 12-guage steel cabinet enclosure with RAL7035
     light grey paint
  Dimensions 32”W x 24” D x 90” H (Standard) up to 300 KVAR
  Removable lifting eyes
  Safety door interlock to prevent door from being opened while
     equipment is energized
  Microprocessor-based controller with built-in voltage and
     harmonic alarms provides a safe and rapid indication of potential
     or real failure; Digital display of power factor, current and
     capacitor step status
  Manual switching capability
  Industrial duly, UL recognized safety disconnect, metallized
     dielectric capacitors, less than 0.2 watts per KVAR losses
     employing 200 kAIC current limiting fuses in all three phases
✓  Designed to minimize installation time and costs
  Convection cooling – no fans required
  Ratings: 120 KVAR maximum at 240 volts 450 KVAR maximum at
     480 and 600 volts
  Split core current transformer (CT)

 

Optional Equipment Features

  Blown fuse indicator
  NEMA 3R cabinet available
  Bottom entry or Top entry
  Hand-off auto switches
  Modeled case circuit breaker internally mounted
     with external operator
  Power on/off switch
  LED capacitor stage display
  Available with Dry Capacitors

Volts kVAR Base Catalog Number kVAR/Step Breaker Rating
240 40 37FJ2040D205 20 400
60 37FJ3060D205 20 400
80 37FJ4080D205 20 400
100 37FJ5100D205 20 400
120 37FJ6120D205 20 600
480 50 37FJ2050F255 25 400
75 37FJ2075F255 25 400
100 37FJ3100F255 25 400
125 37FJ3125F255 25 400
150 37FJ3150F505 50 400
175 37FJ4175F255 25 400
200 37FJ4200F505 50 400
225 37FJ5225F255 25 600
250 37FJ5250F505 50 600
275 37FJ6275F255 25 600
300 37FJ6300F505 50 600
350 37FJ6350F505 50 600
400 37FJ6400F505 50 800
450 37FJ6450F505 50 800
600 50 37FJ2050H255 25 400
75 37FJ2075H255 25 400
100 37FJ3100H255 25 400
125 37FJ3125H255 25 400
150 37FJ3150H505 50 400
175 37FJ4175H255 25 400
200 37FJ4200H505 50 400
225 37FJ5225H255 25 400
250 37FJ5250H505 50 400
275 37FJ6275H255 25 600
300 37FJ6300H505 50 600
350 37FJ6350H505 50 600
400 37FJ6400H505 50 800
450 37FJ6450H505 50 800

To order breaker or blown fuse lights or both
options, see below:

Suffix Letter Option
L Blown Fuse Lights
B Breaker
R Lights & Breaker

Breaker Options:

Current Rating kAIC Ratinng Code for Standard
400 35 00003
600 35 00006

Note: Breaker option suffix number goes after
the Option Suffix Letter.

Quality Products and Services Since 1978
UL508A File # E215926: Industrial Control Panels,
UL698A File # E363726: Industrial Control Panels
Relating To Hazardous Locations
UL891 File# E550145: Switchboards
  • Calculator
  • Standard Flow Rate (SCFM) Calculator

    Calculate the SCFM.

    Power Flowrate Calculator

    Calculate the electrical power, flow rate or temperature requirement.

    Temperature Conversion

    Fill in one value to calculate the other.

    Ohms Law Calculator

    Fill in two values to find the other two.

    Pressure Conversion

    Fill in one value to calculate the other.

    Three Phase Unit Calculator

    Fill in two values to find the 3rd.

    Single Phase Unit Calculator

    Fill in two values to find the 3rd.

    Copyright © 2026 Merrimac Industrial Sales. All Rights Reserved.