Alternating-current test device for bare switch operating characteristics of transformer on-load tap-changer

A technology of on-load tapping and testing equipment, which is applied in the field of transformer switches, can solve the problems of large volume of testing equipment, complicated operation process, and low degree of automation, so as to improve the testing effect and efficiency, simplify the operation of the equipment, and prevent burning accidents Effect
CN105223496AInactive Publication Date: 2016-01-06JILIN ELECTRIC POWER RES INST LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JILIN ELECTRIC POWER RES INST LTD
Publication Date
2016-01-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an alternating-current test device for bare switch operating characteristics of a transformer on-load tap-changer, and belongs to the technical field of transformer switches. The invention aims to provide a transformer on-load tap-changer bare switch operating characteristic alternating-current test device which carries out an operating characteristic alternating-current test in allusion to a bare switch of an on-load tap-changer. The test device provided by the invention is characterized in that the 220V alternating-current mains supply is connected through an interface P1 at first and then transmitted to a transformer T1 and an AC-DC conversion chip respectively through a switch S1, pins 5, 6, pins 3, 4 and pins 1, 2 of an interface IN are externally connected with the output ends of a phase A, a phase B and a phase C of the bare switch of the on-load tap-changer in series respectively, and an output interface of an operating circuit of each phase of the bare switch is equipped with a resistor R; and the pins 5, 6, the pins 3, 4 and the pins 1, 2 are internally connected to pins 1, 2 of the input ends of current sensors S, S2, S3 respectively, and the current sensors S1, S2, S3 respectively correspond to the phase A, the phase B and the phase C of the bare switch of the on-load tap-changer respectively. The alternating-current test device discovers and judges problems such as insufficient contact pressure of a switch contact and the like in allusion to the bare switch of the on-load tap-changer without a transformer winding, the test effect and the test efficiency are improved, and a burning accident of power grid main equipment is effectively prevented.
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Description

technical field

[0001] The invention belongs to the technical field of transformer switches. Background technique

[0002] As one of the main equipments in the power system, the power transformer's working state is related to the operation safety of the entire power system. In the late 1980s, my country began to use on-load voltage regulating transformers in the power grid to realize variable ratio power supply of transformers and provide users with power resources with qualified voltage quality. At present, on-load voltage regulating transformers in the national power supply network account for more than 90% of the total number of transformers. Transformer accidents caused by transformer on-load tap-changers have also skyrocketed, which directly leads to transformer burnout and affects the reliability of power supply. Therefore, the detection of the action characteristics of the transformer on-load tap-changer has become one of the important contents to determine the stabi...

Claims

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