He aha ka hoʻokae? I ka ho omaulia ana o ka selectivity o ka huakai kaapuni nalu

By selectivity mea i manaoia ka ailaʻano papa hana o ka 'ohana ka palekana o ka pou i puhi ai na manao ona. E like me ka hopena o fuses a kaapuni nalu ua Hāʻule maila lākou, a'ā pilina 'ole wahie, e pili ana ia ia ma ka pōkole i puhi ai, a exceedances denominations ma wae kahua, ka wā i ke koena o ka huakai kaapuni mau i ka hana.

Noaia o automata

Ka manaʻo i ka mea selectivity hiki ke loaa ma ka noonoo i ke ano o ka hale uila panel.

Inā he pōkole kaapuni i loko o ka lumi kuke 'ole' ē aʻe lumi E hana hoʻokahi wale nō aiiay i hoʻomākaukauʻia i pili ai i ke kaulahao. ma luna o ka 'akomi komo ua i huliʻia, a e alakai uila ma na pauku i koe. Inā no kekahi kumu i ke kuapo no ka lumi kuke i ole e hana, alaila, o ka pilikia e mana i ka 'akomi komo ma ka huli aku i ka mana no a pau pou wahi i puhi ai.

Mea Maluna

He aha ka ka selectivity o ka mīkini, mea hiki ke hoʻokū 'ia ma ke ano o ko lākou mau hoiliili ole, a me ka pilina mau kiʻikuhi.

1. Piha. A hiki aku oe daisy lei mau manao maalea ma overcurrent reacts ka kekahi i mea hea ka mea me ka pilikia ciia.
2. Ka helehelena. Ke hoomalu Ua like ia me ka piha, akā, e mea ka hoʻokō wale mai i ka kekahi nui o ka overcurrent.
3. Hoa. A hiki aku na manao i pili i ka moʻo me ka ia he 'ano i kekahi manawa kali hou aku ma ka hana o kona gradual ulu mai ka aina me ka malfunction a hiki i ka mana kumu. Manawa ka hoʻokae 'machines hoʻohana no ka mea i pa kēlā me kēia' ē aʻe ma ka shutdown māmā. No ka laʻana: ka mea mua ua triggered ma hope o 0,1 kekona, o ka lua - 0.5 kekona, i ke kolu o ka - 1 kek..
4. O kēia. Selectivity like manawa wale aiao o ka i kā mākouʻikena cutoff. Na manao i koho ma ke ala e hiki aku o ka hōʻemiʻana i ka setpoint, mai ka mana kumu a hiki i ka haawe mea (e laʻa me, 25 A e hoʻokomo o, a hou aku i ka mākeke 16 A a me 10 A -, e kau iho).
5. Manawa-ʻikena. Nā machines i hoakaka ia no ka naoh i ka pono, e like me ka pono me - manawa. Machines i maheleia i loko o nā pūʻulu A, B, C, D. Ua hoonohonoho manawa selectivity i hewa (pōkole kaapuni) Ua paʻakikī no ka mea, i nā 'ano o nā mea i superimposed ma luna o kekahi i kekahi. ʻO kā mākou aiiay hookoia ua loaʻa i loko o ka hui A, a ua kaʻoi loa hoʻohana no ka uila i puhi ai. Ka loa, he pono ole type C ka manaʻo, akā, thoughtlessly anywhere a me ka mea, i ole paipai. Group D ua pili i ka holo nenoai me ka nui inrush paialewa.
6. Ciia. I ka hana o ka mana lako kanaka hoʻoponopono ana pa alima. I ka wā o ka setpoint paepae (hoʻoholo ma mua paepae waiwai),ʻikepili ua pū i hiki ai i ka hooponopono ana iwaena konu, a ua koho 'ia no ka' akomi shutdown. Ke hana hoʻohana ma o ka hana, no ka mea, ua paakiki, pipiʻi, a koi kaʻawale mana na lako. Aia hoʻohana lolouila ke hookuu aku oia: ka wā i ka hewa ua 'akomi i lalo iho mīkini hoouna mai i ka hoailona, e kupuʻia a me kekahi helu kuhi puke i ka helu i ka manawa wā mawaena o ka hola 50 MS. Inā aia ma lalo o ka kuapo iloko o keia manawa ka mea, aole ia i hana, huli i mea, i kahi ma luna o ke kaula.
7. Energy. Machines i ke kiʻekiʻe wikiwiki, ai ka pōkole-huakai kaapuni pono 'aʻole ole i manawa e hiki i ka i kā mākou.

Ano o ka hoʻokae

Hoomalu selectivity ua maheleia i loa paha hoahanau, ke kaumaha ma muli i nā paena i ka polokalamu JavaScript. No ka mea hihia mua o ka loa ike loea kāhea fuses ka poino pauku o ka huakai kaapuni. Ma ka lua o ka disconnected machines ke aupuni 'luna, ina ua ole hana ma lalo hoʻomalu no kela kumu.

selectivity papa

E wae hoomalu hanaʻano nui ka wā e oi aku i ka palena iki kaapuni nalu au _n, 'ole. E. At haʻahaʻa accelerations. Ka wā pōkole-i puhi ai i ka hoʻokō kona nui aku huikau. No keia hopena, Manufacturers kuai aku me nā huahana i na papa o ka selectivity, me ka i oe ke hana laulau me ka e wae auaneʻi. Here oe ke koho i kekahi pūʻulu o ka maalea o ka wale kekahi Hookah. selectivity o ka papaʻaina a hooku iho la ia ma lalo nei, e hiki ke loaʻa iā lākou kekahi ma luna o ka punaewele o ka poʻe.

E ho'āʻo selectivity ma waena o kupuʻia, a kahe iho manaʻo o ke kuʻina o ka lalani, a kolamu, ma "k" - he huina selectivity, a me ka helu - hapa (ina mea emi mai ma mua o ka mea i hoakaka ia cia i loko o ka papaʻaina hewaʻikena).

Helu ana machines selectivity

Aiiay manaʻo meaʻano nui hoʻohana iʻike mau mea hoʻololi, ka selectivity o ka i mea e pono e hōʻoia 'ma ka pololei koho a me ka napoo ana no hoi. Kā lākou e wae 'ana no ka hoomalu hoʻouka kekahi kokoke i ka mana lako ua hoakaka ia ma ka penei ke ano.

• Au _s.o.posled ≥ K _Makalu ∙ I _k.pred. Where:
  - I _s.o.posled - i ka pono ma i ka 'ohana ka palekana ua ho'ā' ia paha;
  - I _k.pred. - pōkole-huakai kaapuni hoomalu ana i ka hopena o ka huahelu, e waiho i ka mea i oi aku ka mamao mai ka mana kumu;
  - K _Makalu - pono kaʻi lau waiwai i hilinaʻi nui ma luna o ka hoʻolei aku kiko'î.

He aha ka selectivity i ka manawa i ka rula o ka machines, ka mea, ua ike mai ke ana ma lalo nei.

• , t ≥, t _{s.o.posled k.pred.} + Δt, ma:
  - na a me na _{s.o.posled k.pred.} - ka manawaʻanuʻu ma i kāhea i ke oki-i machines, niioaaonoaaiii, kokoke a loihi, mai ka mana kumu;
  - Δt - manawa ke kahua selectivity, selectable Catalog.

Mea kiʻi e hoohalike ai o ka selectivity

No ka ike loea overcurrent hoomalu pilina pono ke kāleka selectivity. Ua ho i ka manawa-he 'ano o ka huakai kaapuni mea i hoʻouka kekahi serially i loko o ke kaulahao. Ua koho ka unahiʻole, i ai ia ma luna o ka mokuna wahi e e ike i ka aiiay waiwai o na manao ona. Ma ka hana pono, i ka selectivity o ke kāleka papahana advantageously ole ia, i mea he keakea nui, a hiki aku i ka blackouts mea hoʻohana.

Palena iki hiʻohiʻona e ia ma ka liʻiliʻi loa 2,5 no ka selectivity. Akā,ʻo ka mea, i ka hoʻomaopopo like ana āpana, nae uuku. Wale nō ma ka lākiō o 3.2 ua malamaia, kā lākou kuʻina. Akā, i loko o keia hihia kekahi o na denominations ke loaa ka inflated a me ka pono, e hoʻouka ma hope o ka 'akomi pilina o ka nui kea-pauku.

Ma ka hapanui o na hihia, ka selectivity o ka hoomalu 'aʻole koi' ia. He mea e pono ai wale nō kahi e loaʻa hiki e hoʻoponopono hopena.

Inā ka pōpilikia loina i loaa inflated denominations automata o nā manaʻo kōkua i kaapuni nalu a haawe mea hoʻololi.

E hiki no hoi pili kuikawa e wae machines.

E wae 'akomi S750DR

ABB hana huahana S750DR hoailona, ma ka selectivity o ka mea hoʻololi ua hoʻolako 'ia e ka mea houʻikena i ua ole i hooakea ai ma hope o ka papa kuhikuhiE ka hoʻololiʻana Hoʻokaʻaʻike ma ka pōkole kaapuni.

I ka disconnecting ka pilikia paena lalo iho e wae bimetallic hui 'ua hana ma ke kali hou aku ai i nā pane manawa. Pela ke kumu o kuapo Hoʻokaʻaʻike selectively hoʻi i wahi ma ka pūnāwai hana. Inā ka ma-he mau, e kahe ana ma ka 20-200 MS disconnected thermal hoomalu i loko o ka papa, a kula hope i puhi ai. Penei e wae bimetallic loloa ālai 'disengagingʻano papa hana, a me ka pūnāwai eʻaʻole e hiki ke pani hoʻi i ka papa kuhikuhiE ihe.

Ke kaupalenaʻanaʻikena mīkini ua hoʻolako 'ia e selectively mea pale mū holapū 0.5 ohms o ia'ku, a me ka nui arcing i loko o ka nakeke.

ka hopena

He aha ka ke selectivity, ia mea maʻalahi ka wā e noonoo pono i ka uila i puhi ai me ka moʻo pili o machines e maopopo. Ka mea, e oluolu eʻohi mai, e hoomakaukau e wae auaneʻi ma luna o overload. Pilikia i hoʻomaka ai ka wā nui pōkole-puni au paialewa. No keia mea mau ano, e like me kūikawā machines ABB, e pili ana i kali hou aku; i loko o ka ho'ā hope manawa.