500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/51/1174491738.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">请教高手!关于电源次级冷地的电压问题!
输入电压220V时,零、火线到电源次级冷地均接了470P的Y电容.测试冷地与大地间的电压为110VAC,请问是怎么推算出来的那?这个电压和冷热地间的那个隔离Y电容有没关系那?
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