Vacuum circuit breaker control circuit and system
A vacuum circuit breaker and control circuit technology, applied in the direction of high-voltage air circuit breakers, circuits, electric switches, etc., can solve the problem of affecting the efficiency of the vacuum circuit breaker running-in test, increasing the cost of the running-in test, and damage to the thyristor control circuit device, etc. question
Active Publication Date: 2014-03-26
CHENGDU KEXING ELECTRIC POWER & ELECTRICAL APPLIANCE
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Problems solved by technology
[0004] In view of this, the present invention provides a vacuum circuit breaker control circuit and system, which solves the problem that when the vacuum circuit breaker is connected incorrectly due to the low voltage at the output terminal of the existing thyristor control circuit. The thyristor control circuit has a short-circuit fault, which causes damage to the devices in the thyristor control circuit, which affects the efficiency of the vacuum circuit breaker run-in test and increases the cost of the run-in test.
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0038] The embodiment of the invention discloses a vacuum circuit breaker control circuit and system. By setting the first normally open contact switch at the power input end of the closing circuit of the vacuum circuit breaker, the second normally open contact switch is set at the vacuum circuit breaker The power input end of the opening circuit, when the first switch circuit receives the closing signal, will control the first normally open contact switch to c...
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The invention provides a vacuum circuit breaker control circuit and system. A first normally-opened contact switch is arranged at the power supply input end of a vacuum circuit breaker closing circuit, a second normally-opened contact switch is arranged at the power supply input end of a vacuum circuit breaker opening circuit, and when a first switching circuit receives a closing signal, the first switching circuit controls closing of the first normally-opened contact switch through a first relay coil connected with the first switching circuit and accordingly enable s the vacuum circuit breaker closing circuit to be powered on. When a second switching circuit receives an opening signal, the second switching circuit controls closing of the second normally-opened contact switch through a second relay coil connected with the second switching circuit and accordingly enables the vacuum circuit breaker opening circuit to be powered on. Therefore, checkout of devices in the vacuum circuit breaker opening circuit is achieved, and the problem that the silicon controlled rectifier output end in the prior art always carries with low voltage, accordingly a short-circuit fault of a vacuum circuit breaker occurs, devices in the vacuum circuit breaker control circuit are damaged, and the efficiency of a running-in experiment of the vacuum circuit breaker is influenced.
Description
technical field [0001] The invention relates to the technical field of running-in experiments, and more specifically relates to a vacuum circuit breaker control circuit and system. Background technique [0002] Vacuum circuit breaker is the mainstream switch product of power equipment in power distribution system, and is widely used in the protection and control unit of power distribution equipment in electric power, industrial and mining, construction and other industries. In practical applications, since the vacuum circuit breaker has to withstand thousands of times of closing and opening, in order to ensure the performance of the vacuum circuit breaker, the vacuum circuit breaker is usually run-in before using the vacuum circuit breaker. Experiment, that is, under the rated operating voltage, perform several closing and opening operations on the vacuum circuit breaker, so as to realize the running-in of each part, and check the assembly of the vacuum circuit breaker and t...
Claims
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IPC IPC(8): H01H33/66
Inventor 欧阳彤刘前术曾庆才张华钢赵明何康叶冬曾宇万鹏
Owner CHENGDU KEXING ELECTRIC POWER & ELECTRICAL APPLIANCE