Point-on-Wave Controllers

Description

Definition and Purpose

A point-on-wave controller is a high-speed, microprocessor-based relay that synchronizes the opening or closing of an AC circuit breaker to a preselected instant on the voltage waveform. By triggering at the optimal phase angle, it minimizes switching transients and inrush currents

 

Typical Applications

  • Transformer energization to limit magnetizing inrush

  • Shunt reactor switching for reactive power control

  • Capacitor bank operations to suppress voltage transients and Inrush Current

  • Transmission line switching to enhance grid stability