换一个壳架电流大一级的开关,而额定电流不变.或者换为同等级同安数的施耐德,奇胜等大品牌的开关,这些开关确实有过人之处.还有就是要保持通风,开关与开关之间保留一点点空间利于散热
6居民用电电压不稳,经常烧坏电器咋办?
零线断三相负荷不平衡是造成电压高或者低的原因,达到达不到380V要根据三相负荷不平衡的情况来说的,零线断线三相负荷中,那一相
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