open-phase relay 中文意思是什麼
open-phase relay
解釋
開相繼電器-
The protector of electromotor have used heat relay for a long time, but heat relay not only has a dead area in the light over - loading area, but also ca n ' t protect open phase under so much circumstances
電動機保護裝置採用熱繼電器已有很長的歷史,但熱繼電器在電機的輕過載區存在著「保護死區」 ,而且對斷相保護在許多情況下起不到保護作用。
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