Double-alternating-current voltage switching relay and switching method

• Main Authors: LIU YONGLI, MENG DEJIAN, NI NA, GU JIAHE, LIU YONGFANG
• Format: Patent
• Language: Chinese; English
• Published: 31.10.2023
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention relates to the technical field of power relays, and discloses a double-alternating-current voltage switching relay circuit and a switching method, and the double-alternating-current voltage switching relay circuit comprises a main power supply, a standby power supply, a voltage switching circuit, a voltage detection circuit, an expansion circuit and a magnetic latching relay. The voltage switching circuit comprises a first relay and a second relay which are conversion type relays, a movable contact of the first relay is normally closed at the live wire end of the standby power supply and is normally opened at the live wire end of the main power supply, and a movable contact of the second relay is normally closed at the null line end of the standby power supply and is normally opened at the null line end of the main power supply; the voltage detection circuit is connected with the output end of the voltage switching circuit, and the output end of the voltage detection circuit is connected with a