Substation overvoltage integrated monitoring fault diagnosis device

The utility model discloses a substation overvoltage integrated monitoring fault diagnosis device comprising a transformer and an oil level sensor arranged in the transformer; the oil level sensor is connected with an automatic oil injection mechanism; an inner wall of the transformer is provided with a temperature sensor connected with a programmable controller; the temperature sensor is connected with an automatic switch mechanism comprising an arc track arranged on a knife plate and concentric with a knife hinge shaft; an arc slide rail is arranged in the track; one end of the arc slide rail is connected with a knife insulation rod; an inner side of the arc slide rail is uniformly provided with teeth; the knife plate is provided with a driving motor; a shaft of the driving motor is sleeved with a gear wheel matched with teeth on the inner side of the arc slide rail; one side of the arc track is provided with a through hole allowing the gear wheel to contact with the teeth on the inner side of the arc slide rail; a signal input end of the programmable controller is connected with a monitoring mechanism.