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52xt
发表于 2021-5-15 03:40:00
搜了点货色,其实差未几,都是电流过大,过的未几,就是发烧,过一段时间会跳。电流过大到一定水平就是短路了。
空开是指空气开关,就是过载维护开关,MCB。
Over current protection is protection against short circuits. It generally operates instantly. With standard breakers, between 500% and 1000% of full-load current is the point where the over current protection over-rides the overload protection and opens the circuit instantly.
Overload protection is protection against overheating. It operates slower. Overload protection typically operates on an inverse time curve where the tripping time becomes less as the current increases. |
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