A Method of On-line Monitoring Mechanism Spring of High Voltage Circuit Breaker Using Load Cell

Abstract

The invention belongs to the technical field of circuit breakers and particularly relates to a method for on-line monitoring of a spring of a high-voltage circuit breaker mechanism by using a force measuring sensor. The circuit breaker comprises a main shell and an auxiliary shell which is connected with the front end of the main shell and is communicated with the inside of the main shell; the main shell is sequentially provided with an upper bracket, a vacuum arc extinguishing chamber, a lower bracket, an opening and closing mechanism, an insulating pull rod and a rotating rod from top to bottom; the auxiliary shell is divided into a control chamber and an operating chamber through a horizontally-arranged partition board, a controller and an alarm are installed in the control chamber, theoperating chamber is L-shaped, and a spring operating mechanism is installed in a vertical part of the operating chamber; one end of the rotating rod penetrates through a horizontal part of the operating chamber and is in transmission connection with the spring operating mechanism; and the spring operating mechanism is in transmission connection with the rotating rod. The method has the advantages that the force measuring sensor cooperates with the controller to monitor the compression force of an opening spring and a contact spring in real time; the probability of power failure can be effectively reduced, and long-acting and stable operation of the power grid is guaranteed.

Description

technical field [0001] The invention relates to the circuit breaker technical field, in particular to a method for online monitoring of a high-voltage circuit breaker mechanism spring with a load cell. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off the circuit when they are severely overloaded, short-circuited, or under-voltage. Its function is equivalent to a fuse-type switch. Combination with overheating and underheating relays, etc. Moreover, there is generally no need to change parts after breaking the fault current. At present, it has been widely used. [0003] At present, when the circuit breaker used in the power ...

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Problems solved by technology

[0003] At present, when the circuit breaker used in the power grid is working, its internal spring operating mechanism needs to cooperate with the rotating lever and the opening spring. After the opening spring is frequently compressed and affected by the external environment, its elastic force will change. , if its elastic force does not meet the standard for resetting the spring operating mechanism, it will easily lead to the failure of the opening process, and then cause the circuit breaker to lose its protective effect on the power grid; in addition, the contact spring used in the circuit breaker also has The problem of aging deformation, if the elastic force value does not meet the standard, the contact stroke will be shortened, and then the circuit breaker will not be able to close after it is opened, and eventually cause the circuit breaker to fail, affecting the normal power transmission of the grid

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