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不少地方由于電網(wǎng)供電不穩(wěn)(包括雷電引起的電網(wǎng)電壓瞬間增大)或錯相(220V照明電壓變成380V動力電壓),造成家用電器過壓燒毀的事故屢有發(fā)生。為此,筆者巧用一只壓敏電阻器將普通單相漏電斷路器改造成了過壓、漏電雙功能斷路器。為了避免家里或機關(guān)單位、學(xué)校等處的交流用電設(shè)備不因電網(wǎng)過電壓而損壞,何不趕快動手一試!
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