Switchgear & Distribution

Automatic Power-Factor-Correction Capacitor Bank

480 V · stepped / detuned

Entogo automatic power-factor-correction capacitor bank

Overview

An automatic power-factor-correction (PFC) capacitor bank for 480 V, 60 Hz systems — stepped, controller-switched kVAR with detuned harmonic-filter reactors to raise power factor, cut demand charges and free transformer capacity. Designed to UL 810, IEEE 18 and NEMA CP-1; UL/CSA certifiable.

This automatic power-factor-correction capacitor bank raises the power factor of 480 V, 60 Hz loads — switching stepped kVAR in and out under a PF controller to cut utility demand and reactive charges and free real capacity in transformers and feeders. Detuned filter reactors (typically 7% or 14%) suppress harmonics and protect the capacitors on VFD-heavy and other non-linear systems.

Contactor switching is standard, with thyristor / dynamic switching available where speed and service life matter, in NEMA 1 indoor or 3R outdoor enclosures sized to the load. Designed and built to UL 810, ANSI/IEEE 18 and NEMA CP-1 and installed per the NEC, with UL (cULus) / CSA certification available on request.

Key features

  • Raises power factor, cuts utility demand / reactive charges and frees real transformer and feeder capacity.
  • Designed and built to UL 810, ANSI/IEEE 18 and NEMA CP-1, installed per NEC, 60 Hz — UL (cULus) / CSA certification available on request.
  • Detuned filter reactors suppress harmonics and protect capacitors on non-linear (VFD-heavy) systems.
  • Automatic PF controller with contactor switching; thyristor / dynamic switching optional for fast, durable response.
  • NEMA 1 indoor or 3R outdoor; stepped kVAR sized to the load.

FAQ

Common questions

Why install a power-factor-correction capacitor bank?
Correcting power factor reduces reactive current, which lowers utility demand/reactive charges, frees real capacity in transformers and feeders, and improves voltage. An automatic (stepped) bank switches kVAR in and out to match the load.
Do I need detuned reactors?
On systems with significant harmonic content (VFDs, rectifiers), detuned filter reactors (typically 7% or 14%) are recommended to suppress harmonics and protect the capacitors. They are available as part of the bank.
What standards and ratings apply?
480 V (240 / 600 V available), stepped kVAR with PF controller, 60 Hz. Designed to UL 810, ANSI/IEEE 18 and NEMA CP-1, installed per NEC; UL (cULus) / CSA certification available on request.

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