Three-Phase Shunt Reactors

A three-phase shunt reactor is a power factor correction element connected in parallel with a 400 V grid that draws inductive reactive power and balances the excess capacitive reactive power in the facility. It is added to the power factor correction panel as a step in facilities where long cable runs, UPS units, LED lighting and electronic power supplies predominate and all three phases shift toward capacitive to a similar degree. Entes and Tibcon three-phase series include ratings such as 0.5 kVAr, 1 kVAr, 2.5 kVAr, 10 kVAr, 15 kVAr and 50 kVAr at a 400 V rated voltage. Determine the reactor power by the capacitive reactive power read from analyzer or meter records; choose it by comparing the rated voltage, the step increments and your relay's support for shunt reactor steps. If the capacitive load is unevenly distributed across the phases, single-phase shunt reactors or SVC solutions that work per phase give more suitable results. A harmonic filter reactor is a different product connected in series with a capacitor and is not a substitute for a shunt reactor.

Products

How to choose Three-Phase Shunt Reactors

A three-phase shunt reactor is a power factor correction element connected in parallel with a 400 V grid that draws inductive reactive power and balances the excess capacitive reactive power in the facility. It is added to the power factor correction panel as a step in facilities where long cable runs, UPS units, LED lighting and electronic power supplies predominate and all three phases shift toward capacitive to a similar degree.

  • Take reactive power demand and harmonic distortion levels from site measurements or project calculations.
  • Compare kVAr step sizes, rated voltage and step count against the compensation panel layout.
  • Select capacitor duty contactors, harmonic filter reactors and discharge resistors together with the capacitor bank.

Frequently asked questions

What is Three-Phase Shunt Reactors and where is it used?

A three-phase shunt reactor is a power factor correction element connected in parallel with a 400 V grid that draws inductive reactive power and balances the excess capacitive reactive power in the facility. It is added to the power factor correction panel as a step in facilities where long cable runs, UPS units, LED lighting and electronic power supplies predominate and all three phases shift toward capacitive to a similar degree.

What should I compare when choosing Three-Phase Shunt Reactors?

Determine the reactor power by the capacitive reactive power read from analyzer or meter records; choose it by comparing the rated voltage, the step increments and your relay's support for shunt reactor steps.

Where can I find technical details for Three-Phase Shunt Reactors products?

A harmonic filter reactor is a different product connected in series with a capacitor and is not a substitute for a shunt reactor.

Three-Phase Shunt Reactors Selection Guide: Technical Criteria and Engineering Practice