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Method for detecting mechanical characteristics of circuit breaker

A technology of mechanical characteristics and detection methods, which is applied in the direction of circuit breaker testing, mechanical component testing, machine/structural component testing, etc. It can solve problems such as single detection time parameters, complicated wiring, and inconvenient detection work, so as to avoid personnel There is a huge difference in the number of equipment and equipment, saving maintenance labor and costs, and improving labor productivity

Inactive Publication Date: 2015-03-04
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0002] At present, most of the existing technologies for detecting the mechanical characteristics of circuit breakers are to define and detect the mechanical characteristics of circuit breakers through the stroke-time curve of the switch. Different sensors, and the detection time is relatively fixed, and can only be detected when the circuit breaker is overhauled; in addition, the detection time of this detection technology is longer, and the wiring is more complicated, so only a single detection time parameter , the current waveform information of the circuit breaker control circuit including the time information cannot be provided, and the C-GIS switch that has been put into operation cannot be detected, which brings inconvenience to the detection work in this field

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  • Method for detecting mechanical characteristics of circuit breaker
  • Method for detecting mechanical characteristics of circuit breaker
  • Method for detecting mechanical characteristics of circuit breaker

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Embodiment Construction

[0026] Below in conjunction with specific embodiment, the present invention is further described as follows:

[0027] The invention judges whether the mechanical characteristics of the circuit breaker are good or not by detecting the opening and closing coil current of the control circuit of the circuit breaker. The opening and closing electromagnet plays an important role in the circuit breaker operating mechanism. It is responsible for transmitting the opening and closing instructions of the circuit breaker, and triggers the mechanical system with electromagnetic force to complete the opening and closing actions. In the long-term operation of the opening and closing electromagnet, there will be faults such as iron core jamming and inter-turn short circuit caused by various reasons, which will cause the decline of the mechanical performance of the circuit breaker. Misfit. Therefore, an in-depth analysis of the opening and closing electromagnet of the circuit breaker can comp...

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Abstract

The invention relates to a method for detecting mechanical characteristics of a circuit breaker. A control circuit of the circuit breaker supplies power by the aid of direct-current constant voltage, switching-closing coil current of the control circuit of the circuit breaker is detected, the action state of a switching-closing electromagnet is analyzed, and the mechanical characteristics of the circuit breaker are finally judged. The corresponding relation between voltage and current of the switching-closing electromagnet is expressed by a formula shown in an instruction, U refers to coil power supply voltage, R refers to coil resistance, L refers to coil equivalent inductance, the influence of the speed of an iron core on the current is further expressed by converting the formula, delta refers to an electromagnet air gap, and v refers to the change speed of the air gap, namely, the movement speed of the iron core. Compared with the prior art, the circuit breaker can be detected, all operation mechanisms of the circuit breaker are springs, the method can detect C-GIS switch incapable of being detected by traditional detection technology, maintenance labor and cost are saved, and on-site labor productivity is improved.

Description

[technical field] [0001] The invention relates to the technical field of circuit breaker detection, in particular to a method for detecting the mechanical characteristics of a circuit breaker. [Background technique] [0002] At present, most of the existing technologies for detecting the mechanical characteristics of circuit breakers are to define and detect the mechanical characteristics of circuit breakers through the stroke-time curve of the switch. Different sensors, and the detection time is relatively fixed, and can only be detected when the circuit breaker is overhauled; in addition, the detection time of this detection technology is longer, and the wiring is more complicated, so only a single detection time parameter , the current waveform information of the circuit breaker control circuit including the time information cannot be provided, and the C-GIS switch that has been put into operation cannot be detected, which brings inconvenience to the detection work in thi...

Claims

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Application Information

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IPC IPC(8): G01R31/327G01M13/00
Inventor 李晓峰潘瑾庞先海景皓顾朝敏孙祎
Owner STATE GRID CORP OF CHINA
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