家里(li)的在(zai)充電時經常(chang)被燒壞(huai)，開始以(yi)為是(shi)以(yi)為電源適配器質量不好的原因，但最后檢查(cha)了一下，不是(shi)。那么究竟是(shi)怎么回事呢(ni)？

可能(neng)(neng)(neng)的原因就是(shi)(shi)瞬間(jian)過(guo)壓，這種過(guo)電(dian)(dian)(dian)(dian)(dian)壓既(ji)可能(neng)(neng)(neng)是(shi)(shi)電(dian)(dian)(dian)(dian)(dian)源(yuan)切(qie)換(huan)(huan)過(guo)電(dian)(dian)(dian)(dian)(dian)壓，也可能(neng)(neng)(neng)是(shi)(shi)雷擊過(guo)電(dian)(dian)(dian)(dian)(dian)壓。小區的供(gong)電(dian)(dian)(dian)(dian)(dian)來自于電(dian)(dian)(dian)(dian)(dian)網，而電(dian)(dian)(dian)(dian)(dian)網往往會(hui)有多路(lu)供(gong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)源(yuan)。在電(dian)(dian)(dian)(dian)(dian)源(yuan)切(qie)換(huan)(huan)瞬間(jian)，由于三相切(qie)換(huan)(huan)的時間(jian)不會(hui)完全同步，因此會(hui)出現瞬間(jian)過(guo)壓。對于小區的配(pei)電(dian)(dian)(dian)(dian)(dian)網，在電(dian)(dian)(dian)(dian)(dian)源(yuan)切(qie)換(huan)(huan)瞬間(jian)，感(gan)性負載(zai)（如高層建筑(zhu)的打水(shui)水(shui)泵電(dian)(dian)(dian)(dian)(dian)機等等）也會(hui)產生過(guo)電(dian)(dian)(dian)(dian)(dian)壓。

對于(yu)家里的用電(dian)(dian)設備，抵御過電(dian)(dian)壓(ya)的能力(li)(li)不盡相同。一般地，電(dian)(dian)機(ji)類(lei)例如洗衣機(ji)、空調、電(dian)(dian)冰箱，還有加熱(re)類(lei)如微波(bo)爐和電(dian)(dian)飯煲(bao)之類(lei)，抵御過電(dian)(dian)壓(ya)的能力(li)(li)較(jiao)強，而(er)照明類(lei)和整流器類(lei)（如各種手機(ji)和路由器的充電(dian)(dian)器）的過電(dian)(dian)壓(ya)能力(li)(li)較(jiao)弱(ruo)，有可能因過壓(ya)而(er)擊穿。

筆記本的(de)電源適配器其實是非(fei)常強悍的(de)，短(duan)時(shi)的(de)過壓和低電壓對它都(dou)不會(hui)有(you)影響。解決的(de)辦法是：在家用(yong)配電箱內安裝一只浪涌保護器，既可(ke)以(yi)防止雷擊，也可(ke)以(yi)抑(yi)制(zhi)瞬(shun)間(jian)過電壓。