Masu watsewar da'ira sune na'urori masu mahimmanci a tsarin wutar lantarki, suna ba da damar sarrafa juyi da kariya ta atomatik. Ana amfani da su ko'ina a cikin kowane yanayi, daga wutar lantarki na gida zuwa grid mai ƙarfi mai ƙarfi. Ayyukan su na asali sune nauyin nauyi / gajeriyar kewayawa / kariya ta ruwa, amincin kayan aiki, kwanciyar hankali na wutar lantarki, da rigakafin gobara da wutar lantarki.
Babban kariyar kewayawa / reshe a cikin akwatunan rarraba: Kariya mai zaman kanta don haske, kwasfa, kwandishan, da da'irar dafa abinci / ɗakin wanka; Kuskuren kuskure baya shafar wutar lantarki ga gidan gaba ɗaya.
Ragowar kariya ta yanzu (RCCB/ RCBO): Kariya daga girgiza wutar lantarki a wuraren damp (dakunan wanka, kicin); Babban kariyar yabo layin da ke shigowa yana haɓaka amincin mutum.
Kashewar wutar lantarki yayin gyare-gyare/gyare-gyare: Katse haɗin gwiwar hannu don amintaccen binciken wayoyi da na'urori.
Babban rarraba wutar lantarki da kariyar reshe a cikin tarurrukan bita: Ana amfani da na'urori masu rarraba wutar lantarki (ACBs) don babban layin da ke shigowa na masana'anta da ƙananan ƙarfin wutar lantarki na na'ura;Molded case circuit breakers (MCCBs)ana amfani da su don kewaya kayan aiki da sarrafa motoci.
Kariyar Motoci: Yana Kare magoya baya, famfo, compressors, kayan aikin inji, da sauransu, daga kitsewa, rumfa, da ƙona asarar lokaci.
Muhalli na musamman: Tabbatar da fashewa (ma'adinin kwal, shuke-shuken sinadarai), yanayin zafi mai zafi / lalata (ƙarfe, ginin jirgin ruwa).
Tsarin kariyar matakan matakai da yawa: Haɗin kai mataki uku na babban canji - reshe - kayan aiki, tabbatar da ainihin keɓewar kuskure da rage ƙarancin wutar lantarki.