有的电工在替用户安装日光灯时,往往不装电容器,认为装不装无关紧要。有的用户也考虑装电容器会增加开支而愿意省去。为什么日光灯要装电容器呢?这是因为日光灯镇流器是一种电感性负载。它在电路中占用了一部分无功功率。这个无功功率虽然在电 When some electricians install fluorescent lamps for users, they often do not install capacitors, and it is irrelevant whether they are installed. Some users also consider installing capacitors to increase expenses and are willing to save. Why do fluorescent lamps have capacitors? This is because fluorescent lamp ballasts are inductive loads. It takes up some of the reactive power in the circuit. Although this reactive power is in electricity