DC (direct current) breakdown testing device for insulation test sample
A test device and DC breakdown technology, applied in the direction of measuring device, testing dielectric strength, measuring electricity, etc., can solve the problem of inability to accurately test the DC breakdown performance of insulating samples, reduce the unevenness of the electric field, reduce the use of amount, the effect of preventing discharge
Active Publication Date: 2019-11-15
STATE GRID ELECTRIC POWER RES INST +1
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[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a DC breakdown test device for insulation samples to solve the problem that the DC breakdown of insulation samples at high temperatures cannot be accurately tested in the prior art when performing insulation breakdown performance analysis. performance technical issues
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[0023] The present invention will be further described below in conjunction with the drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
[0024] It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. indicate the orientation or position The relationship is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and does not require that the present invention must be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. The terms "front", "rear", "left", "right", "upper" and "lower" used in the description of the present invention refer to the directions in the drawings, and the terms...
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The invention discloses a DC (direct current) breakdown testing device for an insulation test sample in thetechnical field of insulation testing, and aims to solve the problems that discharge occurs in a breakdown testing process and DC breakdown performance of the insulation test sample at high temperature cannot be accurately tested due to electric fieldunevenness of air between a metal bar andan oil tank wall in the prior art. The device comprises an oil tank containing insulating oil, wherein two breakdown electrodes which are distributed along axis of the oil tank and soaked in oil are accommodated in the oil tank, one breakdown electrode is grounded, the other breakdown electrode is electrically connected with a DC voltage generator through a conducting rod, one end of the conducting rod is located in oil, the other end is located outside the oil, and a heating part soaked in oil is also accommodated in the oil tank.
Description
Technical field [0001] The invention relates to a DC breakdown test device for an insulation sample, belonging to the technical field of insulation testing. Background technique [0002] In recent years, DC transmission technology has developed rapidly, especially with the wide application of flexible DC transmission technology, the transmission capacity has been increasing, and the voltage level has also been continuously improved. At the same time, it also provides insulation for transformers, switches, and cables for transmission (such as epoxy resin). Resin, cross-linked polyethylene, rubber, etc.) put forward higher insulation requirements. For this reason, before the insulating material is put into use, it is usually necessary to conduct a DC breakdown test on the sample to verify its DC breakdown performance. [0003] During the DC breakdown test, in order to prevent the discharge phenomenon in the DC breakdown process, the breakdown electrode (such as ball electrode) is us...
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IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 朱智恩李栋马一力杨黎明高凯曾浩陈龙啸王传博
Owner STATE GRID ELECTRIC POWER RES INST