TRIP

(SWITCH) [verb] [T] -pp- - to move (a switch that operates an electrical system), or to cause (such a system) to start or stop working by moving a switchA special system prevents the circuitry being tripped accidentally by a power surge or lightning strike.A trip switch is a safety switch which automatically stops electricity flowing to a machine if a dangerously large current is created by the machine failing to operate as it should.