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Method, device and system for detecting open-circuit faults of transformers

A technology of open circuit fault and detection method, which is applied in the field of transformers, can solve problems such as difficult detection of transformers, and achieve the effect of improving the pass rate of the factory

Active Publication Date: 2015-05-20
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The main purpose of the present invention is to provide a transformer open circuit fault detection method, device and system to solve the problem in the related art that it is difficult to detect transformers with open circuit faults such as "coupling and disconnection" and "time-on and time-off".

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  • Method, device and system for detecting open-circuit faults of transformers
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  • Method, device and system for detecting open-circuit faults of transformers

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Embodiment Construction

[0028] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only the present invention. Some, but not all, embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall belong to the protection scope of the present invention.

[0030] It should be noted that the terms "first" and "second" in the descripti...

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Abstract

The invention discloses a method, a device and a system for detecting open-circuit faults of transformers. The method for detecting the open-circuit faults of the transformers includes detecting output voltage values and / or output current values of the transformers; judging whether the output voltage values and / or the output current values of the transformers are abnormal or not; determining that the transformers are disqualified if the output voltage values and / or the output current values of the transformers are abnormal. Rated voltages are carried by primary components of the transformers, and rated loads are connected to secondary components of the transformers. The method, the device and the system have the advantages that the problem of difficulty in detecting 'apparently disconnected but actually connected' and 'intermittent' open-circuit faults of transformers in the prior art can be solved, and effects of increasing the delivery qualified rate of the transformers can be realized.

Description

technical field [0001] The present invention relates to the field of transformers, in particular to a method, device and system for detecting a transformer disconnection fault. Background technique [0002] The failure rate of transformers caused by transformer disconnection accounts for about 40% of the failure rate of transformer failures in the production process and after-sales transformer failures. According to the analysis, it is found that there are five main reasons for the disconnection of the transformer: [0003] Reason 1: The excessive twisting of the multi-strand wires of the transformer leads to damage or even breaking of the main strands of the transformer; The third reason is that the enameled wire at the welding part of the transformer pin does not reserve the number of unwelded turns and the winding width to release the stress, which causes the enameled wire to be strained or broken when the "outer eight" legs are separated. Reason 4: The wire package is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
Inventor 洪海彬黄才笋吴丽花孙永强刘月浪杨泽森
Owner GREE ELECTRIC APPLIANCES INC
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