direct action control circuit

Small-capacity substations and small-capacity hydropower circuit breakers
with simple wiring at 3skV and below often use AC operating power. C1) Direct action control circuit     The circuit is shown in Figure 6-62. It uses the release device (YRi, YR2) in the manual operating mechanism of the circuit breaker as overcurrent and short-circuit protection, without the need for additional relays. This circuit is only suitable for situations where protection requirements are not high.