trip switch
noun [ C ] uk/ˈtrɪp ˌswɪtʃ/ us/ˈtrɪp ˌswɪtʃ/
跳闸开关,跳脱开关(一种安全开关,机器故障不能正常运行而产生较大危险电流时,它自动停止给机器供电)
a safety switch that automatically stops electricity from flowing to a machine if a dangerously large current is created by the machine failing to operate as it should