Control loop of automatic switching reactive compensation device

The utility model discloses a control loop of an automatic switching reactive compensation device. The control loop comprises a controller and a vacuum contactor, and is characterized by further comprising two intermediate relays, wherein two intermediate relay coils are respectively connected with a closing contact and an opening contact of the controller between power supply ends in series, and normally opened contacts of the two intermediate relays are respectively connected with an opening contact and a closing contact of the vacuum contactor in series. According to the utility model, an opening/closing loop is connected with the intermediate relays, and the impact current during opening and closing can be borne by the intermediate relays, so that the contacts of the controlled cannot be burned, and crash, black screen and the like of the controller cannot occur, a capacitor group is switched normally, the accident rate is reduced, the service life of the controller is prolonged, and the normal operation