浪(lang)涌(yong)(yong)也叫突(tu)波(bo)，顧名思義(yi)就是超出(chu)正常工作電壓的(de)(de)(de)瞬間過電壓。本質上講，浪(lang)涌(yong)(yong)是發生(sheng)在僅(jin)(jin)僅(jin)(jin)幾百(bai)萬分之一秒(miao)時間內的(de)(de)(de)一種(zhong)劇烈脈沖。可(ke)能引(yin)起浪(lang)涌(yong)(yong)的(de)(de)(de)原(yuan)因有(you)：重型設備、短路(lu)、電源切換(huan)或(huo)大型發動機(ji)。而含有(you)浪(lang)涌(yong)(yong)阻絕裝置的(de)(de)(de)產品可(ke)以(yi)有(you)效地吸收突(tu)發的(de)(de)(de)巨大能量，以(yi)保護連(lian)接設備免于受損。
浪(lang)涌保護(hu)器(qi)(qi)，也(ye)叫信(xin)號防(fang)雷保護(hu)器(qi)(qi)，是一(yi)種為各(ge)種電(dian)(dian)(dian)(dian)子(zi)設(she)備、儀器(qi)(qi)儀表、通(tong)訊(xun)線路(lu)提(ti)供安全防(fang)護(hu)的電(dian)(dian)(dian)(dian)子(zi)裝置(zhi)。當電(dian)(dian)(dian)(dian)氣回(hui)路(lu)或者(zhe)通(tong)信(xin)線路(lu)中因為外界的干擾(rao)突然產生尖峰電(dian)(dian)(dian)(dian)流或者(zhe)電(dian)(dian)(dian)(dian)壓時，浪(lang)涌保護(hu)器(qi)(qi)能在極短的時間內導通(tong)分流，從而避免浪(lang)涌對回(hui)路(lu)中其他設(she)備的損害。
