ʻO ka wehewehe pōkole:

M4 series molded case circuit breaker, ia pili kaapuni o AC 50/60Hz, helu insulation voltage 690 V (M4-125 500V), i helu ʻia ka volta hana AC 690V a i lalo, helu ʻia ka hana ʻana i kēia manawa 12.5-1600A, no ka hāʻawi ʻana i ka ikehu o ka uila a me ka hana pinepine ʻole a me ka haki ʻana. Hāʻawi ʻia ka circuitbrea kers me ka hana o ka pale ʻana i ka overload a me ka pōkole pōkole a me ka undervoltage. Hoʻokō nā mea haʻihaʻi kaapuni i ka maʻamau o IEC60947-2. ʻO nā mea haʻihaʻi kaapuni ʻelua insulating (I ka m = 250A a i luna paha), ua hoʻokaʻawale ʻia ke kaapuni mana o nā mea hana me ke kaapuni nui, a ʻaʻole pono e wehe i ka uhi o ke kaʻapuni i ka wā e hoʻokomo ai i nā mea komo.