single pole breaker
/ˈsɪŋɡəl ˈpəʊl ˈbɹeɪkə/
n
English · single pole breaker中文 · 单极断路器Español · interruptor automático unipolarFrançais · disjoncteur unipolaire
意味：Protection device for a 120-volt circuit that, in the event of overload, is released and thus cuts off electricity to the circuits.