Three-Phase Power Capacitors

A three-phase power capacitor is a three-phase power factor correction capacitor that supplies the reactive power of all three phases in a single housing on a three-phase low-voltage grid. It is used in the steps of automatic power factor correction panels switched in by a contactor or thyristor module, and also in fixed correction of motors and transformers. In this category, cylindrical-housing models from Entes, Tibcon and Tense are offered in ratings such as 10 kVAr, 12.5 kVAr, 20 kVAr and 25 kVAr and rated voltages such as 400 V, 450 V, 525 V and 690 V; heavy-duty types are also available. Choose the rating by the step plan, the rated voltage by the grid voltage and whether the step has a reactor, the standard or heavy-duty type by the operating conditions defined by the manufacturer, and the housing size by the panel layout. The power that two capacitors with the same kVAr label deliver on a 400 V grid differs depending on their rated voltage; always read the power value together with the rated voltage. A three-phase power capacitor is not a harmonic filter on its own; in facilities with harmonics, it is used in series with a suitable filter reactor.

Products

How to choose Three-Phase Power Capacitors

A three-phase power capacitor is a three-phase power factor correction capacitor that supplies the reactive power of all three phases in a single housing on a three-phase low-voltage grid. It is used in the steps of automatic power factor correction panels switched in by a contactor or thyristor module, and also in fixed correction of motors and transformers.

  • 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 Power Capacitors and where is it used?

A three-phase power capacitor is a three-phase power factor correction capacitor that supplies the reactive power of all three phases in a single housing on a three-phase low-voltage grid. It is used in the steps of automatic power factor correction panels switched in by a contactor or thyristor module, and also in fixed correction of motors and transformers.

What should I compare when choosing Three-Phase Power Capacitors?

Choose the rating by the step plan, the rated voltage by the grid voltage and whether the step has a reactor, the standard or heavy-duty type by the operating conditions defined by the manufacturer, and the housing size by the panel layout.

Where can I find technical details for Three-Phase Power Capacitors products?

A three-phase power capacitor is not a harmonic filter on its own; in facilities with harmonics, it is used in series with a suitable filter reactor.

Three-Phase Power Factor Correction Capacitors Selection Guide