A high-voltage switch and its three-position operating mechanism

Abstract

The present invention relates to a high-voltage switch and a three-position operation mechanism thereof. The high-voltage switch comprises a three-position operating mechanism. The three-position operating mechanism comprises an output shaft, and a grounding opening blocking piece and an isolation opening blocking piece movably assembled and configured to correspondingly perform one-way blocking cooperation with a grounding opening spacing portion and an isolation opening spacing portion to stop the output shaft at an opening position. Each blocking piece has one one-way blocking surface, thetwo one-way blocking surfaces are opposite in the direction, the two blocking pieces have blocking positions and avoidance positions on the movement travels, in the grounding opening and closing travels of the output shaft, the isolation opening blocking piece is located at the avoidance position and the grounding opening blocking piece is located in the blocking position, in the isolation openingand closing travels of the output shaft, the grounding opening blocking piece is located in the avoidance position, and the isolation opening blocking piece is located in the blocking position. The high-voltage switch and the three-position operation mechanism thereof can avoid faults of a motor or a controller to cause the continuous rotation of the output shaft when the output shaft is operateto an opening position so as to avoid generation of the fault of closing by mistake and improve the safety of the closing.

Description

technical field [0001] The invention relates to a high-voltage switch and a three-station operating mechanism thereof. Background technique [0002] The high-voltage switch, also known as the high-voltage circuit breaker, is one of the most critical components in the power transmission system. According to the current operating statistics of the high-voltage switch, more than half of the failures of the high-voltage switch are caused by the failure of the operating mechanism. In the operating mechanism, the vast majority of failures come from the failure of the driving motor. One of the common driving motor failures is related to the controller. , under normal circumstances, the driving motor rotates forward to open and reverse to close under the control of the controller, and stops when it reaches the closing and opening positions to maintain the closing and opening positions. If the controller is the driving motor Continuous power supply, for example, when the driving mot...

AI Technical Summary

Problems solved by technology

[0002] The high-voltage switch, also known as the high-voltage circuit breaker, is one of the most critical components in the power transmission system. According to the current operating statistics of the high-voltage switch, more than half of the failures of the high-voltage switch are caused by the failure of the operating mechanism. In the operating mechanism, the vast majority of failures come from the failure of the driving motor. One of the common driving motor failures is related to the controller. , under normal circumstances, the driving motor rotates forward to open and reverse to close under the control of the controller, and stops when it reaches the closing and opening positions to maintain the closing and opening positions. If the controller is the driving motor Continuous power supply, for example, when the driving motor drives the output shaft to rotate until the contact connected to the output shaft is at the isolation opening position or the grounding opening position, the continuously powered driving motor continues to rotate, resulting in the contact being unable to maintain the opening position. Position, and continuous movement to the closing position, that is, false closing, may lead to major safety accidents in the high-voltage transmission system, which is extremely harmful

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