Najważniejszym
elementem w instalacji elektrycznej jest mechanizm odcinający dopływ prądu do
urządzeń elektrycznych (w tym przypadku silników wind kotwicznych). Zabezpiecza
układ przed niebezpiecznymi spięciami w instalacji i chroni silnik elektryczny
windy kotwicznej. W nagłych przypadkach umożliwia odcięcie dopływu
prądu.
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