ʻIke hewa PEN
Hoʻopili ʻia ka hapa nui o nā ʻohana UK me kahi ʻōnaehana PME (Protective Multiple Earth), kahi e holo ai ka uea honua i kahi wahi lako nui i hoʻopili ʻia i kahi conductor kūʻokoʻa i hoʻopaʻa ʻia ma nā wahi he nui. Loaʻa i kēia mau ʻōnaehana ka hewa i kapa ʻia ʻo neutral failure, kahi i hoʻokuʻu ʻia i luna ma muli o ka hoʻohaʻahaʻa ʻana a i ʻole ka corrosion hiki ke hoʻonui i ka pilikia o ka haʻalulu uila.
ʻIke hewa PEN: No nā ʻōnaehana TN-CS me ka hoʻopaʻa ʻole ʻia ma ka hopena o ka mea hoʻohana (e like me ka mea i hōʻike ʻia ma luna), ke ʻoki ʻia ka laina PEN i ka hale ma muli o kahi hewa laina a ua hoʻokuʻu ʻia ka hope hope o ka laina PEN me ka ʻole o ka honua hou. , a ʻaʻole hana pono ka pahu hoʻolaha RCD i kēia manawa, ua like ka volta o ka lepo pale PE me ka volta o ka laina ahi L.
Inā ʻaʻole i hoʻolako ʻia me kēia pale, e hoʻopiʻi ʻia ka pūpū o ka EV i ka hoʻouka ʻana me ka volta e like me ka laina ahi L.
uila uila. Inā ʻaʻohe mea hana ʻē aʻe koe wale nō ka charger EV, ʻoi aku ka leakage o kēia manawa ma mua o 30mA a ʻaʻole hiki i ke kanaka ke haʻalele iā ia iho, he pilikia palekana; inā loaʻa nā mea hana ʻē aʻe, hiki ke maʻalahi ka leakage o kēia manawa ma mua o 100mA, he mea make loa.