Cut-off terminal short trouble experiment loop used for ultra/extra-high voltage breaker

A terminal short-circuit and fault test technology, used in circuit breaker testing, instruments, measuring devices, etc., can solve problems such as difficulty in meeting breaking capacity requirements

Inactive Publication Date: 2009-04-08
CHINA XD ELECTRIC CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the inspection of circuit breaker terminal short-circuit fault opening, the direct test method is usually used, but for the circuit breaker with a large short-circuit breaking capacity, it is difficult for the laboratory to use the direct test method to meet the requirements of its breaking capacity. synthetic test method
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  • Cut-off terminal short trouble experiment loop used for ultra/extra-high voltage breaker
  • Cut-off terminal short trouble experiment loop used for ultra/extra-high voltage breaker

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] refer to figure 1 , figure 2 , in this embodiment, the test main power supply is mainly composed of an impact generator G and a transformer to provide the short-circuit current load required by the test circuit breaker TB. An auxiliary circuit breaker AB1 protects the current source when the current is disconnected; the current source frequency modulation circuit is composed of a series resistor RO1 and a capacitor CO1, and its function is to reduce the recovery voltage rise rate of the current source, which is beneficial to the first auxiliary circuit breaker AB1 The arc extension circuit of the test circuit breaker TB, the arc extension circuit is composed of the arc extension switch ZK, the arc extension discharge gap DQy, the arc extension resistance Ry, and the arc extension capacitor Cy in series in sequence, and its function is to make the tes...

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Abstract

The invention relates to an on-off terminal short-circuit fault testing of a 800kV and a 1100kV ultra-high/extremely-high voltage AC circuit breaker, in particular to an on-off terminal short-circuit fault testing loop of an ultra-high/extremely-high voltage circuit breaker. The on-off terminal short-circuit fault testing loop comprises a test main electrical power source and a test circuit breaker. The invention is characterized in that the on-off terminal short-circuit fault testing loop also comprises a first auxiliary circuit breaker, a second auxiliary circuit breaker, a first voltage source and a second voltage source, wherein, the first auxiliary circuit breaker is connected between the high-voltage end of the test main power source and one terminal of the test circuit breaker in series, the second auxiliary circuit breaker is connected between the low-voltage end of the test main power source and the other terminal of the test circuit breaker in series, the first voltage source is connected with the test circuit breaker in parallel, and the second voltage source is connected with the second auxiliary circuit breaker in parallel.

Description

technical field [0001] The invention relates to a short-circuit fault test of breaking terminals of 800kV and 1100kV super / ultra-high voltage AC circuit breakers, in particular to a test circuit for short-circuit faults of breaking terminals of super / ultra-high voltage circuit breakers. Background technique [0002] With the continuous expansion of the power grid, the capacity of the power system continues to increase, the power transmission distance is lengthened, the voltage level is increased, and the system fault current is also increased. This puts more and more stringent requirements on the work of circuit breakers. Can correctly test the performance of the circuit breaker to meet the requirements of the power system. [0003] For the inspection of circuit breaker terminal short-circuit fault opening, the direct test method is usually used, but for the circuit breaker with a large short-circuit breaking capacity, it is difficult for the laboratory to use the direct tes...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R31/327
Inventor 姚斯立杜炜李刚孙梅
Owner CHINA XD ELECTRIC CO LTD
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