Protection Relay

It is a relay (79) that can shorten the power outage time of the line by switching the circuit breaker after a certain period of time when the circuit breaker is opened caused by temporary short circuit and ground fault of the line. It is used in combination with line protection relays and can be reclosed up to three times.

79

• • Re-closing (79)
• • OLTC blocking
• • Self-diagnosis
• • Circuit breaker operation status monitoring
• • The function to save a number of breaker operation time
• • Re-closing automatic test function
• • Change setting values using HMI