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此产品如图所示电源电压为60伏直流,正常时工作电流300mA左右,但负载非常容易短路,短路后电压直接接到电流表取样电阻上取样电阻小于10欧,采用什么过流保护方法可以避免取样电阻烧毁,或者采用什么样的取样电阻可以避免烧毁.在此先谢了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/53/561711180152285.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
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