Three-Phase Reactive Power Control Relays

A three-phase reactive power control relay is a power factor correction relay that measures the current and voltage of each phase separately and controls capacitor steps and, depending on the model, shunt reactor steps on a per-phase basis; it is chosen by number of steps, the step types it can connect, SVC compatibility, supply voltage and communication. It is used to correct each phase separately in business centers, hospitals, schools and housing complexes where single-phase loads such as lighting, air conditioning, UPS units and office equipment are not evenly distributed across the phases. The category includes the Entes RGA, RGSR and RGP series and the Tense RGT series; alongside 12, 18 and 24 step models, there are also SVC-compatible relays with 12 + TCR and 18 + TCR outputs. Product data specifies features such as a 3-phase 3-current measurement connection, graphic LCD or touchscreen display, RS-485 communication, generator mode, and the ability to connect single-, two- or three-phase capacitors and shunt reactors. An SVC-compatible relay does not provide stepless correction on its own; it is not a substitute for the inductive load driver and shunt reactor, and works together with these elements.

Products

How to choose Three-Phase Reactive Power Control Relays

A three-phase reactive power control relay is a power factor correction relay that measures the current and voltage of each phase separately and controls capacitor steps and, depending on the model, shunt reactor steps on a per-phase basis; it is chosen by number of steps, the step types it can connect, SVC compatibility, supply voltage and communication. It is used to correct each phase separately in business centers, hospitals, schools and housing complexes where single-phase loads such as lighting, air conditioning, UPS units and office equipment are not evenly distributed across the 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 Three-Phase Reactive Power Control Relays and where is it used?

A three-phase reactive power control relay is a power factor correction relay that measures the current and voltage of each phase separately and controls capacitor steps and, depending on the model, shunt reactor steps on a per-phase basis; it is chosen by number of steps, the step types it can connect, SVC compatibility, supply voltage and communication. It is used to correct each phase separately in business centers, hospitals, schools and housing complexes where single-phase loads such as lighting, air conditioning, UPS units and office equipment are not evenly distributed across the phases.

What should I compare when choosing Three-Phase Reactive Power Control Relays?

Compare the intended use, technical values, dimensions, connection type and compatibility shown on each product page.

Where can I find technical details for Three-Phase Reactive Power Control Relays products?

It is used to correct each phase separately in business centers, hospitals, schools and housing complexes where single-phase loads such as lighting, air conditioning, UPS units and office equipment are not evenly distributed across the phases.

Three-Phase Reactive Power Control Relays Selection Guide: Technical Criteria and Engineering Practice