High voltage cable direct current leakage test method

A technology of DC leakage and test method, which is applied in the direction of measuring electricity, measuring electrical variables, and testing dielectric strength, etc., can solve the problems of long time and low efficiency, and achieve the goal of improving work efficiency, simplifying work steps, and reducing the length of the general wiring. Effect

Inactive Publication Date: 2016-06-29
STATE GRID SHANDONG ELECTRIC POWER CO QINGZHOU POWER SUPPLY CO +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] From the statistics in the above table, it can be seen that the traditional test method takes a long time and is inefficient

Method used

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  • High voltage cable direct current leakage test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: as figure 2 As shown, a high-voltage cable DC leakage test method includes the following steps:

[0026] A. Loosen the fixing screws of the cable 2, and fix the two ends of the cable 2 on a stable support according to the pressure resistance requirements, and spread the distance to the ground to a suitable position; use sandpaper to polish the copper rust of the cable 2 terminal, and use the terminal cloth to wipe clean;

[0027] B. Use the insulation resistance meter to distinguish the A phase, B phase and C phase of the cable 2, and mark it with a whiteboard marker;

[0028] C. Connect the test connection line of the DC high voltage generator 1 to the A-phase terminal of the cable 2, and connect the other end of the DC high voltage generator 1 to the ground wire of the cable 2, and the connection should be in good contact;

[0029] The connection between D and A phase terminals is tightly covered with insulating material;

[0030] E. Connect the B-ph...

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Abstract

The invention provides a high-voltage cable DC leakage test method, which is characterized in that it includes the following steps: A, untie the cable fixing screws, and fix the two ends of the cable on a stable support; B, distinguish the A phase of the cable, Phase B and Phase C, and mark them; C, connect the test connection wire to the A phase terminal of the cable; use insulating material to cover the connection of D and A phase terminals tightly; prevent the increase of leakage stray current from affecting the test. E. Connect the B-phase terminal to the C-phase terminal through the insulation test line; the connection between the F, B-phase and C-phase terminals is tightly covered with insulating material; G. Check the test connection line for correct test. Due to the adoption of the above-mentioned technical scheme, the DC leakage test method for high-voltage cables of the present invention can realize the DC leakage test of high-voltage cables, greatly reduce the total wiring time of the test, simplify working steps, and improve work efficiency.

Description

technical field [0001] The invention relates to the field of electric high-voltage cable tests, in particular to a high-voltage cable DC leakage test method. Background technique [0002] High-voltage power cables must undergo DC high-voltage leakage tests before and after they are put into operation to check cable insulation defects and ensure the safe operation of electrical equipment. This test is very important. Such as figure 1 As shown, the test method of the traditional three-core cable is to untie the crimping bolts at both ends of the cable and spread the absolute safety distance to the ground. When testing phase A, connect the test line to the high-voltage generator, and the other two phases B and C are grounded together with the cable shielding grounding terminal and the instrument grounding terminal. The method of testing phase B and phase C is the same as that of phase A. The following is a high-voltage cable for DC leakage test time statistics as follows: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 郭红军杨慧赵静刘伟曾芳刘帅
Owner STATE GRID SHANDONG ELECTRIC POWER CO QINGZHOU POWER SUPPLY CO
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