Relay protection and automatic devices of "Bresler-01X7" series, type "Bresler-0117.700".

The relay protection and automation devices of "Bresler-01X7" series are designed for use in secondary switching circuits and performing functions of relay protection, automation, control, signalling and RAS, organisation of information and measurement systems of power facilities with network voltage from 0,4 to 750 kV. The device "Bresler-0117.70?" realises the main and reserve protection of the transformer 110-220 kV and is intended for protection of the transformer from internal faults and protection from long flow of external short-circuit currents. The device "Bresler-0117.71?" realises the reserve protection of the transformer and automatic control of the circuit breaker (ACB) 110-220 kV and is intended for redundancy of the main protection of the transformer and protection of the transformer from long-term flow of external short-circuit currents and for control of the circuit breaker. The device "Bresler-0107.720" realises the main and backup protection of the autotransformer with the highest voltage of 220 kV.