When using mesh, closedcircuitvoltage equation groups will be more exquisite, direct complex circuit is the special case of alternating complex circuit.
通过交、直流电路在使用基尔霍夫方程组解题的分析讨论，可知回路电压方程采用网孔法比较准确，不易出错。
2
The circuit has the function of thermal shutdown, current limiting and closed control loop of current and voltage.
该电路具有过热保护、短路保护功能和电流、电压闭环控制回路功能。
3
Caution: under-voltage release must be electricity, circuit breaker can be closed, otherwise will damage circuit breaker!