circuit breaker

Some function of his brain acted as a psi-circuit breaker, shutting off awareness before his mind could be blasted.

A circuit-breaker may be set so as to open its connections in one or more seconds after a certain current begins to flow.

A circuit-breaker with its contacts under oil offers a much smaller opportunity than a fuse for the maintenance of an arc.

The accompanying cut shows the combination of battery B, the circuit-breaker, and the rod mounted upon the box.

With motors an automatic circuit breaker, disconnecting all wires of the circuit, may serve as both switch and cut-out.