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病态电路故障分为断路和短路两类.诊断方法应根据答案分别从断路和短路进行思考,判断时一种方法是根据题意,对照提供的答案确定故障部位;11另一种方法是把答案分别代入电路中,根据出现的情况判断哪一种符合题意.下面举例谈谈这类问题的诊断方法.一、由电压表和电流表示数情况诊断故障方法①若电压表有示数且等于电源电压而电流表无示数,则电路中必然发生了断路故障,且断路点就在电压表两接线柱之间的所测部分.若电压表有示数且等于电源电压,而电路中又没有电流表,则可能是电压表所测部分以外的用电器发生了短路.②若电压表和电流表均无示数,则可能是两表接
Pathological fault is divided into two types of open circuit and short circuit. Diagnostic methods should be based on the answer from the open circuit and short circuit thinking, a method of judgment is based on the ins and outs of the control provided by the answer to determine the location of the fault; 11 Another way is to answer Respectively, into the circuit, according to the situation to determine what kind of compliance with the questions below an example to talk about the diagnosis of such problems. First, the voltage meter and the current number of cases that the number of fault diagnosis method ① If the voltmeter has shown and is equal to The power supply voltage and the ammeter has no indication, then the circuit will inevitably occur in the open circuit fault, and the circuit breaker point in the voltmeter between the two terminals of the measured part.If the voltmeter shows the number and equal to the supply voltage, and the circuit is not Ammeter, it may be the voltmeter measured outside the appliance short circuit occurred.②If the voltmeter and ammeter are not shown, it may be two meter