AC voltage withstanding special-purpose wire testing device and using method

Abstract

The invention discloses an AC voltage withstanding special-purpose wire testing device comprising a clamping support, a shielding device and a to-be-tested wire, wherein the clamping support is provided with an installation hole, and the to-be-tested wire passes through the installation hole and the shielding device; and a height-adjustable extrusion plate is arranged on the clamping bracket. By arranging an aluminum foil outer cover diameter expanding structure, the shielding effect on the to-be-tested wire is achieved, corona discharge generated by the wire can be eliminated by the aluminumfoil outer cover, and therefore the anti-corona capacity of the aluminum foil diameter expanding structure on the wire is tested under the condition that alternating current passes through the wire. And by arranging the structure capable of fixing the wiring board, whether the current passing through the to-be-tested wire is influenced by the too long lead or not can be conveniently tested throughthe wiring board, so that the test voltage cannot rise to the expected test value. By arranging the fixing structure for the to-be-tested wire, what is guaranteed is that the wire is in a stable state in the whole test process, and by arranging the structure that the to-be-tested wire is arranged in the center of the aluminum foil outer cover, what is guaranteed is that the shielding effect of the aluminum foil outer cover on the wire is stable.

Description

technical field [0001] The invention relates to the technical field of electric power testing, in particular to a testing device for AC withstand voltage transmission lines. Background technique [0002] In the field test of 500kV equipment, it often occurs that the capacity of the withstand voltage equipment is full but the voltage has not been added to the expected test value. The reason is that the high-voltage lead wire is too long and the surface is not smooth to produce corona, which seriously affects the Q value of the quality factor, so that the test voltage cannot rise to the expected test value. Usually, the aluminum foil paper expanding shell configured by the manufacturer uses the expanding connecting wire as a shield to increase the diameter of the wire and prevent the wire from generating corona discharge. However, the aluminum foil paper expanding shell is made of a spiral steel wire as a skeleton, and then covered with aluminum foil or aluminum foil with a p...

AI Technical Summary

Problems solved by technology

When used in field tests, the connection between the expanded wire and the equipment is prone to damage due to the poor toughness of the outer covering material

In the case of strong winds during the test, the expanded wire will shake, and it is easy to cause damage, which has certain potential safety hazards

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