Improved electric earthing switch

• Main Author: SHEN CHANGDA
• Format: Patent
• Language: English
• Published: 08.10.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

The utility model relates to the technical field of switch equipment, and especially relates to an improved electric earthing switch. The earthing switch comprises a housing. The housing is provided with two switching positions. An electric operating mechanism is arranged in the switching positions. A switch device is arranged at the lower end of the housing. The electric operating mechanism comprises an electromagnetic valve and an electromagnetic push rod. The lower end of the electromagnetic push rod is provided with a pressure spring. A clutch pin is arranged between the electromagnetic push rod and the pressure spring. The switch device comprises a support. The upper end of the support is provided with an insulator. The bottom portion of the support is provided with a driving device. The output end of the driving device is provided with a static contact. The upper end of the static contact is provided with a moving contact cooperatively used with the electric operating mechanism. A spring is arranged between the static contact and the support bottom portion. According to the improved electric earthing switch, the electric operating mechanism and the earthing switch device are combined into one body, so that the installation structure of an original earthing switch is not changed, and free switching between manual operation and electric operation can be realized; and the improved electric earthing switch is safe and reliable, reasonable in designed structure, and easy and convenient to install and maintain, has the anti-blocking function, and can realize the function of motor control and protection.