Nā ʻāpana hoʻokaʻawale kaapuni haʻahaʻa haʻahaʻa: kū i ka manawa pōkole (Icw), he aha kēia ʻāpana i hoʻohana ʻia?

kū i kēia manawa pōkole (Icw)：Ka hiki o akaapuni kaapunie kū i ka 0.05, 0.1, 0.25, 0.5 a i ʻole 1s me ka ʻole o ka hāʻule ʻana i ka volta i hāʻawi ʻia.
ʻO ka manawa pōkole i hoʻopaʻa ʻia e kū i kēia manawa, ʻike ʻia hoʻi ʻo thermal stable current, ʻo ia ke ʻano kūpono e hiki ai i kahi mea hoʻokele kaapuni a i ʻole nā ​​​​mea hana ʻē aʻe ke kūpaʻa no kahi manawa pōkole.Ua like kona nui me ka manawa pōkole i helu ʻia a ʻo ka manawa maʻamau he 3 a i ʻole 4 kekona.

ʻO Icw ka papa kuhikuhi loiloi o ke kūpaʻa uila a me ke kūpaʻa wela o ka mea haʻihaʻi kaapuni i ka huakaʻi lohi pōkole.No ka papa B kaapuni kaapuni.ʻO ka maʻamau, ʻo ka VALUE liʻiliʻi o Icw:

Ke In≤2500A, he 12In a i ʻole 5kA,

Ke In> 2500A, he 30kA

(NO YUW1_2000, Icw ʻo 400V, 50kA; no DW45_3200, Icw ʻo 400V, 65kA).

Ua helu ʻia ʻo Icw i ka manawa pōkole e kū i kēia manawa:Ua ʻōlelo ka mea hana i ka RMS hiki ke ʻae ʻia no kahi manawa pōkole i wehewehe ʻia e ka manawa a me ka manawa hiki ke noʻonoʻo ʻia ʻo ia ka RMS hiki ke ʻae ʻia no kahi huahana no ka manawa palena, ma lalo o nā kūlana kūpono, no kahi hoʻonohonoho piha o nā lako a me nā lako uila.Akā ʻaʻole like ke ʻano o nā huahana like ʻole, ʻo ka wehewehe ʻana o ka helu ʻana i ka manawa pōkole i kēia manawa ʻaʻole e like like, ʻo kāna kumu ka mea nui:

• E hōʻoia i ka hilinaʻi o ka mana o ka ʻōnaehana;

• Ma ke kumu o ka hōʻoia ʻana i ka hilinaʻi o ka ʻōnaehana mana, ka palekana o ka huahana ponoʻī

No ka ʻōnaehana hāʻawi haʻahaʻa haʻahaʻa, ua hoʻoholo ʻia ka manawa pōkole i helu ʻia e ka manawa pōkole e hiki mai ana i loko o ka ʻōnaehana ma ke kahua hoʻonohonoho a me ka manawa e hiki ai i ka huahana ponoʻī a me nā huahana ʻē aʻe o ka ʻōnaehana ke kū i kēia manawa.

Iec60364-4-43 maʻamau no ka pale kaapuni pōkole o ka mana puʻunaue nenoaiu akaka: i kēlā me kēia wahi i loko o ka loop ma muli o ka pōkole kaapuni i hoʻokumu 'ia e nā mea a pau o kēia manawa, mai oi aku i ka manawa, i ka'ōnaehana conductor 'aʻole ma mua o ka allowable palena wela. o ka manawa no ka wawahi ana.

No nā kaapuni pōkole ʻaʻole i ʻoi aku ma mua o 5 kekona, ʻo ka manawa (t) no ka mea hoʻokele e piʻi aʻe mai kāna hana maʻamau i ʻae ʻia ka mahana i ʻae ʻia e hiki ke helu ʻia e ke ʻano kumu:

T = (k * S/I) 2K mea hoʻohui waiwai, S conductor wahi, I pōkole-kaapuni waiwai o kēia manawa.

Ma luna, koho i ka haʻahaʻa-puʻi lako i helu pōkole-manawa kū'ē kū'ē waiwai o kēia manawa, mai ka wahi hoʻonoho o ka loa pōkole-kaapuni o kēia manawa, conductor a 'ē aʻe lako i loko o ka nenoaiu mai hana wela piʻi i ka wela hiki ke ku i ka palena o ka manawa, keia elua mau aoao. e noʻonoʻo, i ka hoʻoholo 'ana i ka loa pōkole-kaapuni i kēia manawa hoʻonoho kahua a me ka'ōnaehana hiki ke ku i ka nui pōkole-kaapuni o ka manawa, Ua hoʻoholo hoʻi i ka pōkole-manawa manawa-manawa tolerance o haʻahaʻa-voltage lako ma ka wahi hoʻonoho.

No ka mea ʻokoʻa ka hoʻolālā a me ka hoʻohana ʻana i nā mea uila like ʻole, aia kekahi mau koi kūikawā no ka waiwai o ka manawa pōkole o kēia manawa ma ke kumu o ka hoʻokō ʻana i ka palekana ʻōnaehana:

• No nā lako uila e like me nā busbars, nā keʻena hāʻawi mana haʻahaʻa haʻahaʻa, a me ka wehe ʻana i nā mea hoʻololi, ʻaʻole pono e emi ka waiwai o kēia manawa pōkole ma mua o ke kumu kūʻai o kēia manawa pōkole i manaʻo ʻia ma kahi e hoʻokomo ai, a ʻo ka manawa palena o kēia manawa. ʻaʻole ʻoi aku ka pōkole ma mua o ka manawa hana o nā mea pale i loko o ka ʻōnaehana.

• No nā mea haʻihaʻi kaapuni e hoʻohana ana i ka papa B, ʻaʻole e emi ka waiwai o kēia manawa pōkole ma mua o ka waiwai o kēia manawa pōkole i manaʻo ʻia ma ke kahua hoʻonohonoho, a ʻaʻole e emi ka manawa palena manawa pōkole ma mua o ka manawa hana o ka ʻōnaehana haʻahaʻa. -level pale lako, a hōʻoia i ke koho me ka haʻahaʻa-level pale lako.

Ano, i ka nenoaiu mana lako ukana a me ka manaʻo pōkole kaapuni o keia manawa mahuahua, kaʻana kaʻa kaʻa'ōnaehana nenoaiu mahuahua, haʻahaʻa-voltage uila lako miniaturization, ina wale i ka hahai ana o ka pōkole-manawa tolerance manawa ma lalo o ka lōʻihi manawa palena o kiʻekiʻe waiwai, i ka oiaio. ʻaʻohe mea koʻikoʻi hana nui.

No laila, e like me ka mea hiki loa pōkole-kaapuni o kēia manawa hoʻonoho helu a me nā mea'ē aʻe i loko o ka nenoaiu hiki ke ku i ka kiekie pōkole-kaapuni au o ka manawa, koho kūpono o ka uila lako i loko o ka palekana ma lalo o ka palena manawa o ka pōkole-makahiki kū'ē waiwai o kēia manawa, ma e like me ka 0.5 s Icw waiwai i ka hoʻokolokolo ʻana ua hiki ke hoʻokō i nā koi o ka palekana ʻōnaehana a me ka maikaʻi loa.