MV Circuit Breaker Control with PLC and SCADA

Circuit breakers are one of the most significant components in high voltage (HV) and medium voltage (MV) power lines. In this work, the control of a MV circuit breaker is carried out both classically and with PLC and SCADA. The circuit breakers opening-closing (on-off) actions are performed. Also, depending on the alarms coming from buchholz relay, overcurrent relay and transformer thermometer the circuit breaker is opened. In the training equipment that was built for educational purposes, real devices are used for all components, except for buchholz relay. Via the control panel the circuit breaker can be controlled and monitored both traditionally and from the SCADA screen. PLC/SCADA control is shown to be more reliable than the classical (manual) way.