Alternating-current and direct-current power supply filtering system for intelligent ring main unit

The utility model discloses an AC/DC power supply filtering system for an intelligent ring main unit. The AC/DC power supply filtering system comprises a main/standby power supply switching circuit and an isolation filtering circuit. Wherein the input end of the main and standby power supply switching circuit is connected with an alternating current power supply output end comprising a main powersupply and a standby power supply, the output end of the main and standby power supply switching circuit is connected with the input end of the isolation filter circuit, and the output end of the isolation filter circuit is connected with a load. According to the utility model, different power supplies are selected and switched through the main and standby power supply switching circuit, then circuit noise is eliminated through the isolation filter circuit, safe isolation is realized, and direct current meeting quality requirements is output. 本实用新型公开了一种用于智能环网柜的交直流电源滤波系统，包括主备电源切换电路和隔离滤波电路；所述主备电源切换电路的输入端与包括主用电源和备用电源的交流电