答:处于工作状态的电冰箱压缩机,如遇瞬间断电后又突然来电,其起动电流将超过正常值的许多倍,大大影响压缩机寿命。本文介绍的瞬间断电保护器适用于供电不正常地区,可保证压缩机在断电后五分钟再启动。该线路的特点是省却了一般线路常用的变压器,继电器吸合电流也较小。制作时0.47μf应采用金属膜电容,其余电容耐压为 A: The refrigerator compressor in working condition, if it suddenly calls after a momentary power failure, the starting current will exceed many times the normal value, which will greatly affect the life of the compressor. The instantaneous power failure protector described in this article is suitable for areas where the power supply is not normal, and can ensure that the compressor is restarted five minutes after power failure. The characteristic of this circuit is that it saves the transformers that are commonly used in common lines, and the relay pull-in current is also small. The metal film capacitor should be used for 0.47μf during fabrication, and the remaining capacitor voltage is