Umhlahlandlela Osebenzayo Wezigebengu Zesekethe Ezibunjiwe

2026-08-25 0 Ngishiyele umlayezo

Iyini i-MCCB?

I-MCCB -i-case circuit breaker elibunjiwe— iyisivikelo esine-voltage ephansi esizinqamula ngokuzenzakalelayo isekethe lapho sithola izimo ezigcwele kakhulu noma zesiyingi esifushane. Ngokungafani ne-fuse, ingasethwa kabusha futhi isetshenziswe kabusha ngemva kohambo. Ngaphakathi kwekesi elibunjiwe, indlela yohambo lwe-thermal-magnetic iphatha imisebenzi emibili: into eshisayo isabela ekulayisheni okuzinzile, kuyilapho isici sikazibuthe siphendula ngokushesha kumaphutha e-short-circuit. Umphumela uwukuvikela okuhambisana nendlela ugesi wangempela oziphatha ngayo.

Ungayikhetha nini i-MCCB: iziphakeli eziyinhloko ezingenayo, amaphaneli okusabalalisa ezigaba ezintathu, amasekhethi ezimoto ezinkulu, nanoma iyiphi indawo lapho amandla esekethe emfishane azoba khona edlula lokho i-MCB engakuphazamisa.

Uma i-MCB yanele: izifunda ezincane zokugcina ezinemithwalo enesizotha namazinga aphansi amaphutha - amabhodi okuhlala, izibani nezisekhethi zesokhethi.

250A three-pole MCCB

Ungayikhetha kanjani i-MCCB efanele

Ikalwe okwamanje (Iphakathi)

1. — fanisa umthwalo oqhubekayo, bese uvumela igumbi lokuqala ukuqala amaza amamotho.

Ukuphuka kwamandla (Icu / Ics)

2. — kumele ibe phezulu kunaleyo okungenzeka ukuthi ibe yi-short-circuit yamanje endaweni yokufaka. Uma liphakeme izinga lephutha, liyanda i-Icu oyidingayo.

Izigxobo

3. — I-3P yamasistimu ezigaba ezintathu, 4P lapho okungathathi hlangothi nakho kudinga ukunqanyulwa.

Izilinganiso zamandla kagesi

4. — hlola i-voltage yokusebenza elinganiselwe (Ue), i-insulation voltage (Ui) kanye ne-impulse ukumelana (Uimp) ngokumelene nesistimu.

Amazinga kanye nezitifiketi

5. - Ukuthobela i-IEC/EN 60947-2 kanye nokumakwa kwe-CE kuyisisekelo samaphrojekthi wamazwe ngamazwe.

Isicelo

6. — ukuvikelwa kwemoto, ukusatshalaliswa kwamandla kanye nokufakwa kwezimboni kungase kudinge izilinganiso zozimele ezihlukene nezici zohambo.

Ibukeka kanjani i-250A MCCB ecaciswe kahle:

Ukwenza lokhu kukhonkolo, cabanga nge-DAM3-250 evela ku-C·DADA Electric — i-MCCB enezigxobo ezintathu engu-250A ebonisa lokho okufanele kubhekwe kuleli klasi ledivayisi:

3P ukucushwa

● enesilinganiso samanje esingu-250A (In), esifanele amabhodi okusabalalisa ezigaba ezintathu

Izilinganiso zamandla kagesi:

● 690V~; Ue AC400/415V, Ui 750V, Uimp 8kV

Amandla okuphula aze afike ku-50kA

● — I-Icu ka-18 / 25 / 36 / 50 kA kukho konke okuhlukile kwe-B / C / N / S, ukuze izifaki zikwazi ukufanisa amaleveli amaphutha kumaphoyinti ahlukene enethiwekhi

Ukuthobela i-IEC/EN 60947-2 kanye ne-GB 14048.2

● I-CE imakwe, nesibambo sokuguqula sokuVULA/VALI esicacile ukuze uthole isimo sokusebenza esibonakalayo

● Yakhelwe ukusatshalaliswa kwamandla, ukuvikelwa kwezimoto kanye nezicelo zezimboni

Umqondo walokhu kucaciswa: uhlaka lwama-250A, 3-pole olunamandla okuphuka kwekilasi angu-50kA lumboza iningi lezidingo zomakhi wephaneli kanye nosonkontileka - kusukela kumabhodi okusabalalisa amakhulu kuya kumasekhethi okuphakela izimoto - kuyilapho okuhlukile kwe-Icu kukuvumela ukuthi udle izindleko zosayizi olungile ngokumelene namazinga wangempela wephutha.

Izincomo zokukhetha

● Kumasekhethi okugcina afika ku-~125A anamazinga aphansi wephutha, i-MCB iyinketho yokonga.

● Ngokusatshalaliswa okuyinhloko, ukuvikelwa kwemoto kanye nemishini yokushintsha yezimboni, khetha i-MCCB enamandla okuphuka edlula amandla okufakwa kwe-short-circuit current.

● Uma ungabaza, khulisa isigaba esisodwa ngokuphuka kwamandla: umehluko wezindleko mncane, kuyilapho umkhawulo wokuvikela ungaba umehluko phakathi kwephutha elincane kanye nokunqamuka okukhulu.

Imibuzo ejwayelekile ukubuzwa

Umbuzo: Iyini i-MCCB?

A: Ai-case circuit breaker elibunjiweiyidivayisi ekwazi ukusetha kabusha i-low-voltage evikelayo enqamula isekethe ekulayishweni okuningi noma i-short-circuit, edizayinelwe amazanyana aphezulu namaleveli amaphutha kune-breaker circuit encane.

Q: Isho ukuthini i-Icu ku-MCCB?

A: I-Icu iwumthamo wokugcina wokuphuka kwesekethe emfishane - iphutha elikhulu lamanje isiphuli esingaliphazamisa. I-Ics iwumthamo wokuphulwa kwesevisi, izinga engaphazamisa ngokuphindaphindiwe futhi ihlale isebenza.

Q: Ngingakhetha kanjani amandla okuphuka kwe-MCCB yami?

A: Khetha isilinganiso se-Icu esiphezulu kunesikhathi esizayo se-short-circuit endaweni yokufaka. Amabhodi okusabalalisa anamandla amakhulu e-transformer noma iziphakeli ezinde zemboni ngokuvamile adinga amadivaysi ekilasi angu-36–50kA.

Q: Iyini i-DAM3-250 MCCB?

A: I-DAM3-250 iyisihlukanisi sekesi esinamapali amathathu angu-250A esivela ku-C·DADA Electric, esilinganiselwe kufika ku-690V esinamandla okuphuka afika ku-50kA, ukusatshalaliswa kwamandla, ukuvikelwa kwemoto kanye nezicelo zezimboni.