Be applied to uninterrupted power source's (UPS) static on -off control cabinet of novel dual supply

The utility model provides a be applied to uninterrupted power source's (UPS) static on -off control cabinet of novel dual supply, include: a control circuit arranged in the inner cavity of th, control circuit includes first NAND gate chip U1, second NAND gate chip U2, third NAND gate chip U3, first anticoincidence gate chip U4, second anticoincidence gate chip U5, resistance R4 and diode D4. A detection circuitry detects the high level, first NAND gate chip U1 truns into the high level to low level output, and through second NAND gate chip U2 output high level once more, the high level is received and second input ground connection receipt low level to first anticoincidence gate chip U4's first input end, first anticoincidence gate chip U4 output high level, make a switch circuit trigger the closure, the low level that detects was received to second anticoincidence gate chip U5's first input end receipt high level and second input between the 2nd detection circuitry, second anticoincidence gate chip U5 output high level, the 3rd NAND gate chip U3 truns into the high level to low level output, make the 2nd switch circuit receive the low level, thereby trigger the disconnection, the automatic switch -over of dual supply has been realized.