Johns Electric is one of the best Automatic Power Factor Correction (APFC) and Control panel manufacturers & suppliers in India. All our panels fully comply with all regulatory requirements and are fully tested. Every panel is custom designed and built to customer specifications.


  1. Transformer loss and it's correction.
  2. DG loss and it's correction.
  3. Motor losses.
  4. Harmonic controlling and correction
  5. Thyristor Switching.


A automatic power factor correction (APFC) control panel is a device to switch on and off the 3 phase capacitor banks to maintain the Power Factor at (0.95 to 1.00) of 3 phase load. Through this variant of control panel, Power Factor is taken care of by Switching on the Capacitors when required to maintain the Power Factor at the selected and preset value.

General Specifications

  • Fixed / Modular design
  • Busbar rating upto -6300A
  • BUSBAR Aluminium / Copper, Electrolytic grade
  • Panel confirm to IS Standards
  • The enclosure is completely assembled in CRCA SHEET 14 SWG (2 mm) Panel Structure and 16 SWG (1.6 mm ) Doors/Cover and 10 swg (3 mm) gland plate
  • Cable room can be installed as many as a single core cables
  • Inner panel structure build from angle support
  • Base frame build from channel base of 100 mm only
  • ENTRY Top or Bottom

Unique Specifications and Advantages

  • Uses the best available APFC relay.
  • Standard Stages from 4/6/8/12/14/16 (Single/ Three Phase).
  • Strictly follow ISO 9001-2008
  • Provision for capacitor cooling is provided.
  • Compartmentalised/ Conn-Compartmentlised panel.
  • They will be installed indoors.
  • All doors will be suitably labelled and marked for convenience of operation & maintenance
  • Assurance to maintain UNITY POWER FACTOR, only on our design and calculation done by us.
  • Normally APFC panel is installed near PCC and Transformer/DG.
  • Best combination of Fuse/ Breaker, Capacitor Duty Contactor and capacitor for every stage with reactors is suggested and used in the panel.

Technical Parameters and Data

Rated Voltage: 415 ± 5% volt, 3 phase (4 W + E)
Rated Current: 400A,2000A,3000A,6300A
Rated Insulated Voltage: 690V
Rated Frequency: 50 Hz AC Supply
Rated Short-Time Withstand Current : 80 Ka
Initial peak Rated Short-Time Withstand Current : 220KA
Duration of Short Circuit: 1 second
Protection grade of the enclosure : IP54 standard and optional upto IP66
Forms used for internal separation: upto Form 4b
Temperature rise tested enclosure: An ambient temperature of 50°C
Standard colour for Panel: RAL 7032 Siemens Grey (Please contact us for any other colour)
Nine Tank and Oven & Spray based Paint Process