Pre-emptive condition monitoring

For continuous knowledge of the operational avail

ability of the REF615 features, a comprehensive set

of monitoring functions to supervise the relay

health, the trip circuit, and the circuit breaker

health is included. The breaker monitoring can in

clude checking the wear and tear of the circuit

breaker, the spring charging time of the breaker

operating mechanism and the gas pressure of the

breaker chambers. The relay also monitors the

breaker travel time and the number of circuit

breaker operations to provide basic information

for scheduling breaker maintenance.

Bus protection via GOOSE

The IEC 61850 implementation in REF615 also in

cludes fast peer-to-peer communication, over the

substation bus. Use GOOSE communication be

tween REF615 IEDs of the incoming and outgoing

feeders of a substation cooperate to form a stable,

reliable, and high-speed busbar protection system.