巴赫曼产品说明DIO264，DIO264

DIO264

DIO264维修软起动的配件标准，比维修别的大功率设备要求低。软起动贵重的元件是可控硅，可控硅的三大指标就是：容量，耐压，触发值

容量：软起动的启动电流一般会达到5-8倍额定电流，所以对可控硅的容量冗余要求比较大。我的经验是，真正进口硅，6倍容量。国产硅，至少8倍冗余。

耐压值：这个很多工程人员会忽视，但耐压值是可控硅一个关键的指标，特别是高电压使用场合，耐压值低不能低于2.5倍耐压值，比如额定380V,低于800V的耐压很容易击穿。很多市场上的硅体，标称2500V，实测2000V不到。我自己购买配件时，会先和卖家沟通好，丑话说在前边，低于我的要求，一律退货，大不了出点运费。

触发值：其实只要硅体是好的，大抵都能触发。我要说的是，触发值的一致性，工控器件又不是什么管控器件，市场上大把，主要是性能。选购材料也是硬件维修工程师的基本功，不带个人成见，进口件和国产件的品质高低，除了过流值耐压值这些硬指标，头疼的就是触发一致性。经销商嘛，都称自己的货是原装进口，但只要在触发值上一比较，就原型毕露了。进口件的偏差值很小，一致性有保证。

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