thumb
26-11-2025

Maintaining the correct phase sequence is important in industrial and commercial environments where three-phase power is used to power processes. Lifts, UPS systems, air conditioners, motors, pumps, and other three-phase machinery can all suffer from minor variances in their operation.

 

Understanding the Importance of Phase Sequence

A three-phase system is dependent on the proper order of the electrical phases, known as R, Y, and B. This cycle verifies that equipment linked to the supply performs as planned. When the phase order is incorrect, equipment may not function properly.

 

What is a Phase Sequence Corrector?

A Phase Sequence Corrector (PSC) is a device designed for a three-phase mains supply that keeps the three phases in the right R-Y-B sequence, regardless of the sequence from the input supply.

 

Key Features of the Selfguard Phase Sequence Corrector

  • Maintains correct R-Y-B phase sequence irrespective of input supply.
  • Suitable for three-phase mains supply only.
  • Suitable for three-phase lifts, UPS, air-conditioner, motor, pumps, machinery etc.
  • Provides protection against imbalanced voltage, and is equipped with an in-built single phase preventer.
  • Available in ratings from 15 KVA up to 82.5 KVA

These features make Selfguard’s PSC an indispensable component in ensuring power stability and equipment safety across diverse sectors.

 

Why Your Three-Phase System Needs One

If your activities rely on three-phase power, a Phase Sequence Corrector guarantees that the correct phase sequence is maintained, that equipment is supplied in the proper order, and that you have a device that supports three-phase load systems.

This device is an important component in ensuring that your electrical system is stable, your equipment is safe, and your operations run smoothly.

 

Trusted Quality from Selfguard

Selfguard Automation & Controls has been manufacturing electrical and electronic devices since 1990, using microcontroller-based technology, and providing solutions relating to mains, generator, and agricultural automation.

 

Conclusion

Maintaining the right phase sequence is critical in three-phase supply systems. An Automatic Phase Sequence Corrector, such as Selfguard's, helps to maintain phase order, protect equipment, and promote the reliable running of three-phase machinery.