Single-Phase Power Capacitors

A single-phase power capacitor is a single-phase power factor correction capacitor with two terminals, connected between phase and neutral or between two phases, that supplies reactive power and has its rating stated in kVAr. It is used in steps where each phase is corrected separately in workplaces, stores and small facilities with loads unevenly distributed between phases. In this category, cylindrical-housing models from Entes, Tibcon and Tense are available in ratings such as 0.5 kVAr, 1 kVAr, 2.5 kVAr and 5 kVAr and rated voltages of 230 V and 400 V. Choose the rating by the reactive demand of the phase concerned, the rated voltage by the voltage the capacitor will be connected to and whether the step includes a harmonic filter reactor, and the housing size by the panel layout. A capacitor with a 400 V rated voltage delivers about one third of its label rating at 230 V; calculate the step power accordingly. A motor capacitor, sold by its microfarad value, is made for the auxiliary winding of a single-phase motor and is not a substitute for a power capacitor in a power factor correction step.

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How to choose Single-Phase Power Capacitors

A single-phase power capacitor is a single-phase power factor correction capacitor with two terminals, connected between phase and neutral or between two phases, that supplies reactive power and has its rating stated in kVAr. It is used in steps where each phase is corrected separately in workplaces, stores and small facilities with loads unevenly distributed between phases.

  • 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 Single-Phase Power Capacitors and where is it used?

A single-phase power capacitor is a single-phase power factor correction capacitor with two terminals, connected between phase and neutral or between two phases, that supplies reactive power and has its rating stated in kVAr. It is used in steps where each phase is corrected separately in workplaces, stores and small facilities with loads unevenly distributed between phases.

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

Choose the rating by the reactive demand of the phase concerned, the rated voltage by the voltage the capacitor will be connected to and whether the step includes a harmonic filter reactor, and the housing size by the panel layout.

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

A motor capacitor, sold by its microfarad value, is made for the auxiliary winding of a single-phase motor and is not a substitute for a power capacitor in a power factor correction step.

Single-Phase Power Capacitors Selection Guide: Technical Criteria & Application Standards