Electric operating mechanism for switchgear

Abstract

The invention discloses an electric operating mechanism for switchgear. A core mounted in a case a comprises a driving device, a manual interlocking device, an auxiliary switch component and an electrical element, and brake closing and separating are completed by a motor and an isolation / ground switch through a gear pair / worm gear pair / bidirectional overrunning clutch / output shaft. An output shaft sprocket is connected with a lateral and front face indication sprocket by means of a chain for transmission, the manual interlocking device enables electromagnetic interlocking, manual-electric interlocking and suspension locking, and an operating handle cannot be inserted or pulled until a brake is closed or separated. The electric operating mechanism for the switchgear is simple in structure, systematic inertia has no influences on the output angle and position, and damage of the motor, parts or a main switch of the mechanism caused by uncompleted switching of contacts or a failed position switch are avoided by means of mechanical in-place protection. Furthermore, the electric operating mechanism for the switchgear is complete in interlocking, simple, reliable, small in size, low in cost and small in manual operation moment of force and enables rapid brake closing and separating.

Description

technical field [0001] The invention relates to the field of electric operating mechanisms, in particular to an electric operating mechanism for a disconnector and an earthing switch in a gas-insulated metal-enclosed switchgear (GIS). Background technique [0002] In recent years, with the continuous advancement of high-voltage switchgear technology, gas-insulated metal-enclosed switchgear is developing in the direction of miniaturization, compounding, multi-functional components, and intelligence. It is required to operate the isolating switch, the electric mechanism of the grounding switch is reliable in action, simple in structure, complete in mechanical and electrical interlocking, small in size, convenient in operation and safe. [0003] The current switchgear, especially the electric mechanism used in the isolation / grounding switch operation in the gas-insulated metal-enclosed switchgear (GIS), is distinguished from the mechanical principle, and there are several types...

AI Technical Summary

Problems solved by technology

For example: the system inertia generated by the motor speed and the mass of the transmission system has a great influence on the output shaft angle and position, especially when starting and stopping; the nut is separated from the threaded clutch, which requires high machining accuracy and wear, and often slips and fails; The electromagnetic clutch is large in size and high in cost, and the transmission torque is affected by voltage fluctuations. Electric braking accelerates the wear of carbon brushes and reduces the life of the mechanism. The safety steel ball clutch is large in size and complex in structure; No self-locking, manual interlocking is not complete, travel switch is damaged or does not work, causing motor burnout, mechanism parts and main switch equipment damage, resulting in personal equipment safety accidents

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