DIO264

DIO264維修軟起動(dòng)的配件標(biāo)準(zhǔn)，比維修別的大功率設(shè)備要求低。軟起動(dòng)貴重的元件是可控硅，可控硅的三大指標(biāo)就是：容量，耐壓，觸發(fā)值

容量：軟起動(dòng)的啟動(dòng)電流一般會(huì)達(dá)到5-8倍額定電流，所以對(duì)可控硅的容量冗余要求比較大。我的經(jīng)驗(yàn)是，真正進(jìn)口硅，6倍容量。國(guó)產(chǎn)硅，至少8倍冗余。

耐壓值：這個(gè)很多工程人員會(huì)忽視，但耐壓值是可控硅一個(gè)關(guān)鍵的指標(biāo)，特別是高電壓使用場(chǎng)合，耐壓值低不能低于2.5倍耐壓值，比如額定380V,低于800V的耐壓很容易擊穿。很多市場(chǎng)上的硅體，標(biāo)稱2500V，實(shí)測(cè)2000V不到。我自己購(gòu)買配件時(shí)，會(huì)先和賣家溝通好，丑話說在前邊，低于我的要求，一律退貨，大不了出點(diǎn)運(yùn)費(fèi)。

觸發(fā)值：其實(shí)只要硅體是好的，大抵都能觸發(fā)。我要說的是，觸發(fā)值的一致性，工控器件又不是什么管控器件，市場(chǎng)上大把，主要是性能。選購(gòu)材料也是硬件維修工程師的基本功，不帶個(gè)人成見，進(jìn)口件和國(guó)產(chǎn)件的品質(zhì)高低，除了過流值耐壓值這些硬指標(biāo)，頭疼的就是觸發(fā)一致性。經(jīng)銷商嘛，都稱自己的貨是原裝進(jìn)口，但只要在觸發(fā)值上一比較，就原型畢露了。進(jìn)口件的偏差值很小，一致性有保證。

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