I. Imiqondo Eyisisekelo Yamabhokisi Okusabalalisa
Ibhokisi lokusabalalisa liyithuluzi eliyinhloko ohlelweni lwamandla elisetshenziselwa ukusatshalaliswa kwamandla kagesi okuhlanganisiwe, ukulawula amasekethe kanye nokuvikela imishini kagesi. Lisabalalisa amandla kagesi avela emithonjeni yamandla (njenge-transformers) kumadivayisi kagesi ahlukahlukene futhi lihlanganisa imisebenzi yokuvikela efana nokulayisha ngokweqile, isekethe esifushane kanye nokuvuza.

Ukusetshenziswa okuyinhloko:

Ukusatshalaliswa nokulawulwa kwamandla kagesi (njengokuphakelwa kukagesi kokukhanyisa nemishini kagesi).

Ukuvikelwa kwesekethe (ukulayisha ngokweqile, isekethe esifushane, ukuvuza).

Gada isimo sesekethe (i-voltage kanye nesibonisi samanje).

Ii. Ukuhlukaniswa Kwamabhokisi Okusabalalisa
Ngokwezimo zohlelo lokusebenza:

Ibhokisi lokusabalalisa lasekhaya: Lincane ngosayizi, linezinga lokuvikela eliphansi, lihlanganisa ukuvikelwa kokuvuza, amaswishi omoya, njll.

Ibhokisi lokusabalalisa lezimboni: Umthamo omkhulu, izinga lokuvikela eliphezulu (i-IP54 noma ngaphezulu), lisekela ukulawulwa kwesekethe okuyinkimbinkimbi.

Ibhokisi lokusabalalisa langaphandle: Elingangeni manzi futhi elingangeni uthuli (IP65 noma ngaphezulu), lifanele izindawo ezivulekile.

Ngendlela yokufaka:

Uhlobo lokufakwa oluveziwe: Lunamathele ngqo odongeni, kulula ukulifaka.

Uhlobo olufihliwe: Lufakwe odongeni, luhle ngobuhle kodwa ukwakheka kwalo kuyinkimbinkimbi.

Ngokwesimo sesakhiwo:

Uhlobo oluqinile: Izingxenye zifakwa ngendlela ezinzile, ngezindleko eziphansi.

Uhlobo lwedrowa (ibhokisi lokusabalalisa elihlanganisiwe): Umklamo ohlanganisiwe, olula ukulungiswa nokwandiswa.

Iii. Ukwakheka Kwamabhokisi Okusabalalisa
Umzimba webhokisi:

Izinto: Insimbi (ipuleti lensimbi eligoqwe ngokubandayo, insimbi engagqwali) noma okungeyona insimbi (ipulasitiki yobunjiniyela).

Izinga lokuvikela: Amakhodi e-IP (njenge-IP30, i-IP65) abonisa amandla okumelana nothuli namanzi.

Izingxenye zikagesi zangaphakathi:

Ama-circuit breaker: Ukuvikelwa komthwalo omningi/owesikhashana (njengezinkinobho zomoya, ama-circuit breaker e-case molded).

Isinqamuli: Nquma ugesi ngesandla.

Idivayisi yokuvikela ukuvuza (i-RCD): Ithola ukuvuza kwamanje kanye nokunyakaza.

Imitha kagesi: Ukulinganisa amandla kagesi.

I-Contactor: Ilawula ukude ukuvulwa nokuvalwa kwesekethe.

Isivikelo Sokukhuphuka (i-SPD): Sivikela ekushayweni umbani noma ugesi ongaphezu kwamandla kagesi.

Izingxenye ezisizayo:

Amabha amabhasi (amabha amabhasi ethusi noma e-aluminium), amabhlogo okugcina, izibani zezinkomba, amafeni okupholisa, njll.

Iv. Amapharamitha Obuchwepheshe ebhokisi lokusabalalisa
Isilinganiso samanje: njenge-63A, 100A, 250A, okufanele ikhethwe ngokusekelwe emandleni aphelele omthwalo.

I-voltage ekalwe: Ngokuvamile i-220V (isigaba esisodwa) noma i-380V (isigaba sesithathu).

Izinga lokuvikela (IP): njenge-IP30 (engangeni uthuli), i-IP65 (engangeni manzi).

Ukukhuthazela kwe-short-circuit: Isikhathi sokumelana nomsinga we-short-circuit (njenge-10kA/1s).

Umthamo wokuphuka: Umkhawulo omkhulu wephutha onganqunywa yi-circuit breaker ngokuphephile.

V. Umhlahlandlela Wokukhetha Amabhokisi Okusabalalisa
Ngokusho kohlobo lomthwalo:

Isekethe yokukhanyisa: Khetha i-10-16A miniature circuit breaker (MCB).

Imishini yemoto: Ama-thermal relay noma ama-circuit breaker aqondene nemoto kudingeka afaniswe.

Izindawo ezizwela kakhulu (njengezindlu zangasese): Kumelwe kufakwe idivayisi yokuvikela ukuvuza (30mA).

Ukubalwa komthamo

Isamba samandla kagesi singu-≤ isilinganiso samandla kagesi sebhokisi lokusabalalisa × 0.8 (umkhawulo wokuphepha).

Isibonelo, amandla omthwalo aphelele angama-20kW (izigaba ezintathu), kanti amandla kagesi angaba ngu-30A. Kunconywa ukukhetha ibhokisi lokusabalalisa elingu-50A.

Ukuzivumelanisa nezimo kwemvelo

Indawo enomswakama: Khetha umzimba webhokisi lensimbi engagqwali + izinga lokuvikelwa okuphezulu (IP65).

Indawo eshisa kakhulu: Kudingeka izimbobo noma amafeni okushisa.

Izidingo ezengeziwe:

Gcina u-20% wendawo engenalutho ukuze kube lula ukwengeza amasekethe amasha kamuva.

Vi. Izinyathelo Zokuqapha Nokufaka Nokulungisa
Izidingo zokufaka:

Indawo yomile futhi inomoya omuhle, kude nezinto ezivuthayo.

Ibhokisi lisekelwe ngokuqinile ukuze kuvinjelwe ingozi yokuvuza kukagesi.

Imininingwane yombala wentambo (intambo ebukhoma ebomvu/ephuzi/eluhlaza okotshani, intambo engathathi hlangothi eluhlaza okwesibhakabhaka, intambo ephansi ephuzi eluhlaza okotshani).

Amaphuzu ayisihluthulelo okulungisa:

Hlola njalo ukuthi izintambo zikhululekile noma zi-oxidized.

Hlanza uthuli (ukuze ugweme ukujikeleza okufushane).

Hlola idivayisi yokuvikela (njengokucindezela inkinobho yokuhlola yokuvikela ukuvuza kanye ngenyanga).

Vii. Izinkinga Ezivamile Nezixazululo
Ukukhubeka njalo

Imbangela: Ukulayisha ngokweqile, i-short circuit noma ukuvuza.

Ukuxazulula izinkinga: Nqamula umugqa womthwalo ngomugqa bese uthola isekethe enephutha.

Ukukhubeka kwedivayisi yokuvikela ukuvuza

Okungenzeka: Ukushisa okonakele kwesekethe, ukuvuza kukagesi okuvela emishinini.

Ukwelashwa: Sebenzisa i-megohmmeter ukuhlola ukumelana kokushisa.

Ibhokisi liyashisa kakhulu.

Imbangela: Ukuthwala ngokweqile noma ukuxhumana okungekuhle.

Isixazululo: Nciphisa umthwalo noma uqinise amabhlogo esiphetho.

Viii. Imithethonqubo Yokuphepha
Kumelwe ihambisane nezindinganiso zikazwelonke (njenge-GB 7251.1-2013 “Ama-Switchgear Assemblies aphansi”).

Uma kufakwa futhi kugcinwa, ugesi kumele unqanyulwe futhi umsebenzi kufanele wenziwe ngochwepheshe bakagesi.

Akuvunyelwe ukushintsha amasekethe angaphakathi ngokuthanda noma ukususa amadivayisi okuvikela.