ʻO ke kaula Jiapu e haʻi iā ʻoe i nā kumu maʻamau o nā pilikia uwea mana. Hiki ke hoʻokaʻawale ʻia nā ʻano hewa o ke kelepona i ka grounding, ka pōkole pōkole, ka wehe ʻana o nā ʻano nui ʻekolu o nā ʻano hewa penei:
He ʻāpana o ka uwea kumu i haki a i ʻole ka uwea naha ʻia he nui
I ka hoʻokolohua hoʻohui uea conductor, ke kūʻē ʻana o ke kaula conductor insulation a me nā mea e pili ana i ka laina, akā i ka nānā ʻana i kahi pae a i ʻole nā ʻāpana he nui ʻaʻole hiki ke hoʻopili ʻia, a laila kahi ʻāpana o ka uea koʻikoʻi a i ʻole nā haʻihaʻi he nui.
ʻEkolu-core cable hoʻokahi a ʻelua paha kumu kumu
ʻEkolu-core cable core a i ʻole ʻelua mau mea hoʻokele kumu me ka hoʻāʻo ʻana i ka papa ʻaina hoʻoluliluli ʻana ma waho o ka pilina, a laila hoʻokahi a i ʻole ʻelua kumu i ke kelepona pale ʻana i ka lepo. Inā ʻoi aku ka haʻahaʻa o ke kumu a me ke kumu ma waena o ka noho ʻana o ka insulation ma mua o ka waiwai maʻamau ma mua o ka waiwai o kēia waiwai kūʻē insulation ʻoi aku ka kiʻekiʻe ma mua o 1000 ohms i kapa ʻia ʻo ke kumu kūʻē kiʻekiʻe; ʻO ka mea ʻē aʻe, he haʻahaʻa haʻahaʻa haʻahaʻa kumu. ʻO kēia mau hewa ʻelua i kapa ʻia ʻo ia nā hewa i hoʻokaʻawale ʻia a i hoʻopaʻa ʻia.
ʻEkolu ʻāpana kumu pōkole pōkole
ʻO ka nui o ka pale ʻana o ka honua pōkole ʻo ia ke kaula o ka ʻike kuhi hewa ʻekolu-phase kumu. Aia ʻelua ʻano o ka hewa pōkole: haʻahaʻa haʻahaʻa pōkole-kaapuni hewa, kiʻekiʻe kūʻē pōkole-kaapuni hewa. I ka wā o ka ekolu-phase kumu pōkole-kaapuni, emi ma mua o 1000 ohms o ka honua kū'ē i haʻahaʻa kū'ē pōkole-kaapuni hewa, ma ka mea 'ē aʻe, he kiʻekiʻe kū'ē pōkole-kaapuni hewa.
ʻIkepili kumu:
ʻO ka mua: pōʻino waho
ʻO nā pilikia kelepona i ka pōʻino o waho ke kumu maʻamau o ka pilikia. Ua pōʻino ke kaula e nā mana o waho i ka wā e hiki mai ana e hōʻike i kahi wahi nui o ka pau ʻole o ka mana. No ka laʻana, ke kaʻina hana pipeline ma lalo o ka honua, ke kaula no ka mea ʻoi aku ka nui o ka huki ʻana o ka mīkini hana a huki ʻia; ka hoʻokuʻu ʻana i ke kaula, ka papa pale ma muli o ka piʻi nui ʻana o ke kaula a me ka pōʻino; ʻoki kaula ʻili i ka ʻoki nui a me nā hōʻailona pahi hohonu loa. ʻO kēia mau mea waho pololei e hana i kekahi pōʻino i ke kaula.
ʻO ka lua: ka hoʻomaʻemaʻe insulation
ʻAʻole i hoʻomaʻemaʻe ʻia ke kaʻina hana uea e alakaʻi i ka papa pale o ke kaula i haki; ʻAʻole ʻo ka hoʻopaʻa ʻana i nā ami kaula uwea; lima pale kaula i loko o ke kaula i hoʻohana ʻia e ka mea i hou ʻia a i ʻole i ʻeha ʻia paha. ʻO kēia nā kumu nui o ka maʻemaʻe insulation cable. I kēia manawa, hāʻule ke kūpaʻa insulation, piʻi ka nui o kēia manawa, hoʻoulu i nā pilikia mana.
ʻEkolu: ʻino kemika
ʻO ka hana lōʻihi o kēia manawa e hoʻokuʻu i ka insulation cable i ka wela nui. Inā lōʻihi ka hana ʻana o ka insulation cable i loko o kahi ʻano kemika maikaʻi ʻole e hoʻololi i kāna mau waiwai kino, i hiki ai i ka ʻelemakule o ka insulation cable a nalowale ka hopena, e kū mai nā pilikia mana.
ʻEhā: ka lōʻihi o ka overload hana
Cable lōʻihi-manawa hana kiʻekiʻe o kēia manawa i loko o ke kaiapuni, ina ka laina insulation papa i haumia a elemakule, i hui pu me na mea o waho e like me ka uila a me ka 'ē aʻe ma luna o ka volta hopena, overloading nui ka wela, he mea maʻalahi loa e hōʻike i nā pilikia uwea.
Ka manawa hoʻouna: ʻOkakopa-10-2023