Mandrel material lightning impulse voltage withstanding test device

Abstract

The invention provides a mandrel material lightning impulse voltage withstanding test device, which has the advantages that electrodes and material are convenient to replace, and centring of the electrodes is good. The device comprises a sample table, a test bed cabinet, a cross beam and an oil tank coaxially fixed at the upper part of the test bed cabinet respectively, and a power mechanism arranged at the top part of the cross beam, wherein a T-shaped ground wire connection device is inserted and sealed in the bottom plate of the oil tank, the top contact end is arranged inside the oil tank, and the extending end is connected with the ground wire; the sample table comprises a support and an upper electrode and a lower electrode coaxially arranged on the support respectively; the upper electrode is fixed on an upper electrode connection rod in sliding connection with the support; the lower electrode connection end is provided with a spring; the spring sleeves a lower electrode connection rod piece fixedly connected with the support; the surface where the lower electrode connection piece is contacted with the top contact end of the ground wire connection device is provided with a groove; the groove is matched with the top contact end; the depth of the groove is smaller than the height of the top contact end; and the power output end of the power mechanism is connected with the sample table for controlling rising and falling of the sample table in the oil tank.

Description

technical field [0001] The invention relates to the technical field of insulator testing, in particular to a lightning impulse withstand voltage testing device for a mandrel material. Background technique [0002] At present, domestic composite insulator mandrels mainly use epoxy resin as the matrix material and alkali-free glass fiber as the reinforcing material. The mandrel material needs to be tested for various properties, including bending strength, insulation resistance, penetration test, water diffusion test and lightning impulse withstand voltage test, etc. The electrical properties of the mandrel material have an important impact on the electrical properties of composite insulator products. And the corresponding standards have clear regulations on the lightning impulse withstand voltage test method of mandrel material, electrode material and size. At present, there is no overall test device on the market for the lightning impulse withstand voltage test of the mandr...

AI Technical Summary

Problems solved by technology

Due to the unreasonable design of the supporting test box, the electrodes are not easy to replace, the fixation is unstable, and the centering deviation of the upper and lower electrodes is large during the test, which affects the val

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