Resonance elimination device for voltage transformer

Abstract

The invention discloses a resonance elimination device for a voltage transformer. The device comprises a shell, a protective cover, hinged to the top of the shell through a hinge, and a fixing frame is fixed to the bottom of the back face of the shell. A bidirectional threaded rod is rotationally connected between the tops of the two sides of the inner wall of the fixed frame through a bearing. One end of the bidirectional threaded rod penetrates through the fixing frame and extends to one side of the fixing frame, sliding blocks are in threaded connection with the positions, located in the fixing frame, of the two sides of the surface of the bidirectional threaded rod, and sliding grooves are formed in the two sides of the front face of the inner wall of the fixing frame. The invention discloses a resonance elimination device for a voltage transformer. When the instrument needs to be moved to a far place, the bidirectional threaded rods are rotated until the universal wheels make contact with the ground, then the whole instrument is conveniently moved through the telescopic rods and the pull rods, personnel carrying is not needed, certain labor force is reduced, carrying is convenient, and a foundation is laid for follow-up voltage transformer testing work.

Description

technical field [0001] The invention relates to the technical field of voltage transformers, in particular to a harmonic elimination device for voltage transformers. Background technique [0002] The resonance eliminator is a damping device that protects the primary side of the voltage transformer. It is used to eliminate the resonance in the power grid. Its essence is a high-capacity non-linear resistor, which acts as a damping and current limiting function, and can effectively limit the voltage. The effect of transformer ferromagnetic resonance, if the neutral point of the 6-35kV power grid is not grounded, the TV primary winding connected to Y0 on the busbar becomes the only metallic channel for the power grid to the ground, and the capacitance of the power grid to ground has a charge and discharge through the TV primary winding During the transition process, the test shows that at this time, there is often a power frequency half-wave inrush current with the highest ampli...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a resonance eliminator for voltage transformers, which solves the problem that the resonance eliminator is inconvenient to carry and requires personnel to carry it. At the same time, the internal structure of the testing machine is complicated and the accuracy of the test is low. Issues to be improved

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