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JJlB-11～75/380-1/2 type auto-coupling step-down starter circuit
Source: InternetPublisher:小胖友 Updated: 2011/06/19
In the circuit shown in the figure, SB is the closing button of the circuit breaker QF, and the QF coil is the closing coil of the circuit breaker. Once QF is powered on and closed, it is self-protected by its internal contacts (not shown). If there is overload or short circuit, its normally closed contact QF will trip automatically, the coil will lose power and the circuit breaker will open. Latest Control Circuits Circuits
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