DIO264

DIO264維修軟起動的配件標準，比維修別的大功率設備要求低。軟起動貴重的元件是可控硅，可控硅的三大指標就是：容量，耐壓，觸發值

容量：軟起動的啟動電流一般會達到5-8倍額定電流，所以對可控硅的容量冗余要求比較大。我的經驗是，真正進口硅，6倍容量。國產硅，至少8倍冗余。

耐壓值：這個很多工程人員會忽視，但耐壓值是可控硅一個關鍵的指標，特別是高電壓使用場合，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。很多市場上的硅體，標稱2500V，實測2000V不到。我自己購買配件時，會先和賣家溝通好，丑話說在前邊，低于我的要求，一律退貨，大不了出點運費。

觸發值：其實只要硅體是好的，大抵都能觸發。我要說的是，觸發值的一致性，工控器件又不是什么管控器件，市場上大把，主要是性能。選購材料也是硬件維修工程師的基本功，不帶個人成見，進口件和國產件的品質高低，除了過流值耐壓值這些硬指標，頭疼的就是觸發一致性。經銷商嘛，都稱自己的貨是原裝進口，但只要在觸發值上一比較，就原型畢露了。進口件的偏差值很小，一致性有保證。

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