Nhanganyaya yemusiyano uripo pakati pe4P low voltage circuit breaker ne3P low voltage circuit breaker

Kune vagadziri vakawanda, mamodheru uye mhando dze Muputsi wedunhus. Zvichitaurwa zviri nyore, imhando yeorganic inoumbwa nerutivi rwemutsara rwunouya, rutivi rwemutsara rwunobuda uye muviri wecircuit breaker. Vashandisi vemagetsi kana vashandi vane hanya vanogona kuva nemibvunzo pavanotarisana nemacircuit breaker akasiyana: sei mamwe aine materminal matatu uye mamwe ane materminal mana. Ndeapi musiyano uye kufanana kuripo pakati pawo? Nemubvunzo uyu, tinopinda muchinyorwa chechinyorwa chanhasi totsanangura musiyano uripo pakati pawo zvakadzama.

1. Chitarisiko che 4P ne 3P low voltage circuit breaker

Mufananidzo 1 Chitarisiko che 4P low voltage circuit breaker

Mufananidzo 1 Chitarisiko che3P low voltage circuit breaker

Chinopwanya dunhu re4P chine zvikamu zvitatu nematanda mana, uye materminal mana akarongwa zvakatwasuka, pakati pawo terminal yemutsetse weN inogona kunge iri diki pane mamwe materminal ane zvikamu zvitatu. "Materminal mana" anoonekwa zviri nyore. Kanda yacho inowanzo nyorwa nemamaki eL1, L2, uye L3, uye terminal yeN (neutral line) yedanda rechina inowanzova nemamaki e "N" akajeka.

Chinopwanya dunhu re3P chine zvikamu zvitatu nemapango matatu, uye mapombi matatu emagetsi ane saizi imwe chete akarongwa zvakatwasuka. "Mapombi matatu makuru" anoonekwa zviri nyore. Kanda yacho inowanzo nyorwa nezviratidzo zveL1, L2, uye L3.

Kutaura zvazviri, kubva pakuonekwa, kunze kwehuwandu nehukuru hwematerminals nemamwe malogo, unogona'Handioni musiyano uripo pakati pavo.

2. Nhanganyaya kunheyo dzekushanda dze4P ne3P low-voltage circuit breakers
3. Nhanganyaya yekushanda kwe4P circuit breaker

Kune main contact mana akabatana mukati, matatu acho akabatana mumutsara wakatevedzana kune three phase lines, uye yechina yakabatana mumutsara wakatevedzana kune neutral line. Kana paine zvikanganiso (overload, short circuit) kana manual opening, "four poles dzinobatidzwa nekudzima panguva imwe chete" (vamwe vanogona kusarudza N kuti isadimburwe). Ine hunhu hunotevera.

1.1. Kuchengetedzwa kwemagetsi kwakachengeteka

Ichi ndicho chinhu chinonyanya kukosha che 4P circuit breaker. Inogona kuparadzanisa zvachose ma live conductors ese (kusanganisira N wire) pamagumo e load. Kana "phase loss uye constant zero" zvabviswa zvachose, njodzi yekuti N line ingave ichiri ne voltages dzine njodzi inoramba iripo.

1.2. Gadzirira masisitimu akasiyana-siyana emagetsi

Sisitimu yeTN-S/TN-CS: inogona kushandiswa senzira huru yekubatanidza tambo kuti iwane nzvimbo yakachengeteka.

Sisitimu yeTT: Mutsetse weN wesisitimu yeTT unofanirwa kuparadzaniswa, uye switch yayo yemutsara inouya inofanira kushandisa 4P circuit breaker.

Sisitimu yeIT (kana mutsetse weN wabviswa): Kana sisitimu yeIT yaburitsa mutsetse usina kusimba kuti igadzire magetsi ane waya ina ane zvikamu zvitatu, muchina we 4P circuit breaker unofanira kushandiswa.

Sisitimu yekushandura simba remagetsi maviri: Inogona kudzivirira mitsetse isina kusimba yemagetsi maviri akazvimiririra kuti isabatanidzwa pamwe chete uye kudzivirira tambo isina kusimba inotenderera magetsi.

1.3. Inogona kusanganiswa neyuniti yekufambisa yemagetsi kuti igadzire dziviriro yemodular

Sezvo ichikwanisa kuyera zvakananga mafungu eL1, L2, L3, uye N waya, electronic tripper inogona kudzivirira pasi nekuverenga huwandu hwevector pasina chikonzero che external zero-sequence current transformer.

2. Nhanganyaya yekushanda kwe3P circuit breaker

Kune ma contact matatu makuru akabatana mukati, ayo akabatana mumatanho matatu. Kana paine dambudziko (overload, short circuit) kana manual opening, ma contact matatu anovhurwa panguva imwe chete, zvichibvisa simba remagetsi rema-phase matatu. Mutsetse usina kusimba (N) wedunhu riri pasi peswitch unogara wakabatana netambo isina kusimba iri parutivi rwemagetsi. Une hunhu hunotevera.

2.1. Muhurongwa hweTN-C (hwemawaya mana echikamu chetatu), mutsetse wePEN (mutsetse wakachengetedzwa usina kusimba) unorambidzwa zvachose kudimburwa, uye 3P circuit breaker inofanira kushandiswa.

2.2. Kune michina isingade tambo isina kupindirana (senge mota dzechikamu chetatu), inogona kupa dziviriro yakakwana yekuwedzera simba uye yepfupi, uye chimiro chacho ndicho chinonyatsoenderana.

2.3. Zvichienzaniswa nema 4P circuit breakers emhando imwe chete, 3P circuit breakers akachipa.

2.4. Kupatsanurwa kwemagetsi zvachose hakugone kuitwa, uye N phase haigone kudimburwa zvakananga. Kana sisitimu isina kuenzana pakati pezvikamu zvitatu kana kuti iine kutadza kushanda kwemberi, pane njodzi yekuti tambo isina kuenzana ichaiswa magetsi.

2.5. Nzira yekudzivirira pasi (G protection) yakaoma uye inofanira kushandiswa pakushandura magetsi kwekunze kwe zero-sequence, izvo zvinowedzera kuoma kwekuisa uye mutengo.

3. Pfupiso

Kuburikidza nesumo iri pamusoro apa, vaverengi vanogona kunzwisisa zvakajeka ma 3P circuit breakers nema 4P circuit breakers, kusanganisira kusiyana kwechitarisiko chavo, misimboti yekushanda, uye mashandisirwo azvo, nezvimwewo. Zvisinei, kune zvimwe zvinhu zvakadzama zvisina kutsanangurwa zvakadzama. Saka heino mubvunzo, nei N ichifanira kubviswa muzvikamu mune dzimwe nguva, uye N haifaniri kubviswa muzvikamu mune dzimwe nguva? Chii chine chekuita nazvo zvakananga? Tinogona kufunga nezvedambudziko iri isu pachedu kutanga.