Control device for vacuum circuit breaker
A technology for vacuum circuit breakers and control devices, which is applied to high-voltage air circuit breakers, circuits, electrical components, etc., can solve the problems of inherent electric locomotive air circuit breakers replacement obstacles, cannot meet the operation requirements of vacuum circuit breakers, etc., and achieves convenient transformation and upgrading. Work, use effect is good, the effect of stable performance
Active Publication Date: 2009-10-14
ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD
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Problems solved by technology
[0003] At present, the control circuits of various new electric locomotives are equipped with LCU logic control unit, and its design can meet the operation requirements of BVAC. Control unit, the design of its control circuit can only meet the operation of the air circuit breaker, and the power supply mode for the main circuit breaker when closing is self-resetting instantaneous power, which cannot meet the requirement that the vacuum circuit breaker maintains the closed state by long-term power supply operational requirements, which brings technical obstacles to the replacement of inherent electric locomotive air circuit breakers with vacuum circuit breakers
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[0014] According to the electrical control interface of the main circuit breaker of the inherent locomotive, the related improved design of the electrical control mode of the vacuum circuit breaker is carried out. The control principle diagram of the improved scheme is as follows image 3 shown.
[0015] The improved working principle is: when closing, the vacuum circuit breaker 21 is in the opening state, press the self-resetting "closing" switch that is instantaneously energized, the vacuum circuit breaker 21 solenoid valve 4 is energized, and the gas circuit is opened. The closing operation is completed under the action of compressed air, and the delay relay cuts off the power supply of the solenoid valve 4 after 0.6S, and shuts off the air source. At the same time, the state of self-locking, normally open and interlocking 6 in the figure also becomes normally closed with the closing of the vacuum circuit breaker 21, and the electrical interface of the locomotive is connect...
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A control device for a vacuum circuit breaker is applied to the low-voltage control of a vacuum circuit breaker for a railway locomotive. By improving the design of the vacuum circuit breaker control unit, the technical obstacles brought about by replacing the inherent electric locomotive air circuit breaker with the vacuum circuit breaker are solved. The vacuum circuit breaker control device includes a self-resetting opening switch, a self-resetting closing switch, a holding coil, a delay relay, a self-resetting normally closed intermediate relay and a solenoid valve, and also includes a self-locking normally open, closed auxiliary interlock, self-locking normally open , Closed auxiliary chain is connected with the normal power supply point, so that the power supply mode of the main circuit breaker is changed from self-resetting instantaneous power to direct current with a certain delay, and the vacuum circuit breaker is kept in the closed state. The invention has stable performance, safety and reliability, provides a reliable technical basis for the transformation and upgrading of the air main circuit breaker of the inherent electric locomotive, and facilitates the transformation and upgrading of the main air circuit breaker of the inherent electric locomotive.
Description
technical field [0001] The invention relates to a control device for a vacuum circuit breaker, in particular to a low-voltage control device for a vacuum circuit breaker for a railway locomotive. Background technique [0002] The driver controls the action of the main circuit breaker of the locomotive by manipulating it, thereby controlling the on and off of the main circuit of the locomotive; and when a short circuit or other serious fault occurs on the locomotive, it controls the action of the main circuit breaker to quickly cut off the power supply to protect the locomotive role. The working principle of the vacuum circuit breaker control unit before the improvement is: when the driver needs to close the vacuum circuit breaker, press the "close" switch of the constant power supply, and the 110V power point of the control unit board is energized, that is, the "U+" in the figure is energized , it transmits electricity to the solenoid valve, holding coil and delay relay of ...
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IPC IPC(8): H01H33/66H01H71/10
Inventor 王泰杰魏衍成李涛蒋科
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO LTD