Intermediate relay circuit capable of resisting alternating current input

• Main Authors: LIU YONGLI, LI WEI, NI NA, GU JIAHE
• Format: Patent
• Language: Chinese; English
• Published: 22.07.2022
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS; GENERATION

The invention provides an anti-alternating-current-input intermediate relay circuit. The anti-alternating-current-input intermediate relay circuit comprises a direct-current power source positive electrode end; a direct-current power supply cathode end; a pre-stage switch relay; a controlled relay; the anti-alternating-current device is used for controlling a preceding-stage switch relay to act according to the type of the input power supply; the anti-alternating-current device is provided with a switching circuit, one end of the switching circuit is connected to the negative end of the direct-current power source, the other end of the switching circuit is connected to a relay coil of the preceding-stage switching relay, and the other end of the relay coil of the preceding-stage switching relay is connected with the positive end of the direct-current power source. The anti-alternating current device controls the switching circuit to be switched off according to the detected alternating current input and contr