当电路发生故障时 ,电路中的电流和电压将会发生异常 ,用电器不能工作或者不能正常工作 .产生电路故障的主要原因 ,是由于电路中存在开路或者短路 (包括部分短路 ) ,所以只要通过对一些现象和测量数据进行分析 ,便可从中找出产生故障的原因及故障的位置 .判定电路故障的方法主 When the circuit fails, the current and voltage in the circuit will be abnormal, and the electrical appliance cannot work or work normally. The main reason for the circuit failure is due to open circuit or short circuit (including partial short circuit) in the circuit, so only by Analyze some phenomena and measurement data to find out the cause of the fault and the location of the fault. Determine the method of circuit failure