Device and method for measuring arc contact contacting travel of high-voltage SF6 circuit breaker
A technology for circuit breakers and arcing contacts, which is applied in the field of measuring devices for measuring the contact stroke of arcing contacts of high-voltage SF6 circuit breakers, and can solve problems such as complex measuring devices
Inactive Publication Date: 2015-11-11
XI AN JIAOTONG UNIV
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Problems solved by technology
However: high-precision measurements often mean complex measuring devices
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[0018] Attached below Figure 1-8 And embodiment the present invention is described further:
[0019] In one embodiment, the invention discloses a measuring device for the contact stroke of an isolated contact of a high-voltage SF6 circuit breaker;
[0020] The device includes an angular displacement measurement module, an angular displacement and linear displacement conversion module, and a data acquisition and processing module;
[0021] The angular displacement measurement module includes an angular displacement sensor, and the angular displacement sensor is used to obtain the angular displacement of the main shaft of the circuit breaker, and send the angular displacement to the data acquisition and processing module;
[0022] The angular displacement and linear displacement conversion module is used to fit the stored angular displacement of the main shaft of the circuit breaker and the linear stroke of the arc contact into a corresponding relationship curve and send it to...
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The invention provides a device and a method for measuring the arc contact contacting travel of a high-voltage SF6 circuit breaker. The device comprises an angular displacement measurement module, an angular displacement and linear displacement conversion module, and a data acquisition and processing module. The angular displacement measurement module is used for measuring the angular displacement of the main shaft of a circuit breaker. The angular displacement and linear displacement conversion module is used for acquiring the corresponding relationship between the angular displacement of the main shaft of the circuit breaker and the linear displacement of an arc contact of the circuit breaker. The data acquisition and processing module is used for calculating the linear travel of the arc contact. The method is realized based on the above device and solves the problem in the prior art that conventional linear sensors cannot be applied to high-voltage switchgears can be solved. The linear displacement of the arc contact is ingeniously and indirectly acquired based on the corresponding relationship between the angular displacement and the linear displacement by means of a small and lightweight angular displacement sensor. In this way, high-precision measurement tasks can be realized by means of the simple device. The measurement on the contacting travel alone of the arc contact of the high-voltage SF6 circuit breaker is realized.
Description
technical field [0001] The design of the product involves on-line monitoring of switchgear in the field of electrical products and electrical appliances, and in particular relates to a measuring device and method for measuring the contact stroke of the arcing contact of a high-voltage SF6 circuit breaker. Background technique [0002] The existing method for calculating the electrical life of a circuit breaker is mainly the cumulative breaking current method, which calculates the electrical life based on the mass loss of the contacts, and is based on the cumulative method of the electrical life curve of the high-voltage circuit breaker. However, the degree of electrical wear of contacts under different short-circuit currents is different, and the wear amount is not linearly related to the magnitude of the short-circuit current. It is not enough to judge the amount of contact burnout only by the cumulative breaking current; therefore, the judgment of the amount of burnout of ...
Claims
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Inventor 王小华荣命哲刘天阳刘定新杨爱军王琼李佳蓉范韶迪
Owner XI AN JIAOTONG UNIV