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Alternating current voltage withstand test device for rubber and plastic cable

A technology of AC withstand voltage and test equipment, applied in the direction of testing dielectric strength, etc., can solve problems such as time-consuming and labor-intensive, and achieve the effect of saving time

Inactive Publication Date: 2014-02-19
HANDAN POWER SUPPLY BRANCH OF STATE GRID HEBEI ELECTRONICS POWER
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: Time-consuming and labor-intensive, usually need to pressurize 2-3 times to complete the cable test, each pressurization time is 1 hour

Method used

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  • Alternating current voltage withstand test device for rubber and plastic cable
  • Alternating current voltage withstand test device for rubber and plastic cable

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Embodiment Construction

[0013] like figure 2 As shown, the rubber and plastic cable AC withstand voltage test device is composed of 1# reactor L1, 2# reactor L2, 3# reactor L3 and excitation transformer, 1# reactor L1, 2# reactor L2 and 3# reactor The inductance of the reactor L3 is the same, the 2# reactor L2 and the 3# reactor L3 are connected in parallel and connected in series with the 1# reactor L1, and the 2# reactor L2 and the 3# reactor L3 are connected in parallel and connected in series with the 1# reactor L1 The reactor group is connected in parallel at both ends of the output coil of the excitation transformer, one end of the output coil of the excitation transformer is grounded, and the tested cable Cx is connected in parallel at both ends of 2# reactor L2 and 3# reactor L3.

[0014] The inductance of 1# reactor L1, 2# reactor L2 and 3# reactor L3 is 135H, the rated voltage is 130kV, and the rated current is 5A; the rated capacity of the excitation transformer is 75kVA, and the trans...

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Abstract

The invention discloses an alternating current voltage withstand test device for a rubber and plastic cable. The alternating current voltage withstand test device is composed of a 1# electric reactor (L1), a 2# electric reactor (L2), a 3# electric reactor (L3) and an exciting transformer. The inductance value of the 1# electric reactor (L1), the inductance value of the 2# electric reactor (L2) and the inductance value of the 3# electric reactor (L3) are equal. The 2# electric reactor (L2) and the 3# electric reactor (L3) are connected in parallel and then are connected with the 1# electric reactor (L1) in series, an electric reactor set formed in a mode that the 2# electric reactor (L2) and the 3# electric reactor (L3) are connected in parallel and then are connected with the 1# electric reactor (L1) in series is connected between the two ends of an output coil of the exciting transformer in parallel, one end of the output coil of the exciting transformer is connected to the ground, and a tested cable (Cx) is connected to the two ends of the 2# electric reactor (L2) and the two ends of the 3# electric reactor (L3). Compared with the prior art, the alternating current voltage withstand test device has the advantages that a three-phase cable can be tested at a time, and 2 / 3 of time is saved.

Description

technical field [0001] The invention relates to a cable withstand voltage test device, in particular to an AC withstand voltage test device for rubber and plastic cables. Background technique [0002] With the rapid development of the power industry, high-voltage cables, especially 220kV and 110kV XLPE power cables, have been put into use in large quantities. In order to check the installation quality of high-voltage cables and ensure the safe operation of high-voltage cables, it is particularly necessary to perform AC withstand voltage tests on high-voltage cables before power transmission and commissioning. [0003] Taking a 110kV power cable (cross-sectional area of ​​1*400mm2) as an example, according to GB50150-2006 (Standard for handover test of electrical equipment in electrical installation engineering), the 20-300Hz AC withstand voltage test voltage of rubber and plastic cables is 2Uo=128kV, and the test time is 60 minutes. [0004] At present, the tests are carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 龚辉
Owner HANDAN POWER SUPPLY BRANCH OF STATE GRID HEBEI ELECTRONICS POWER
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