35kV pouring type combined mutual inductor

Abstract

The invention provides a 35kV pouring type combined transformer, which comprises a pouring body, a current mutual inductor assembly and a voltage mutual inductor assembly, wherein the pouring body is provided with a current cavity used for containing the current mutual inductor assembly, and a voltage cavity used for containing the voltage mutual inductor assembly, the current cavity is positioned above the voltage cavity, and the current cavity and the voltage cavity are communicated through a linear cavity; the current mutual inductor assembly comprises a current iron core, a current primary coil and a current secondary coil, wherein the current primary coil and the current secondary coil are wound on the current iron core, and the current primary coil is connected with a connector bar through a connecting piece; and the voltage mutual inductor assembly comprises a voltage iron core, a voltage primary coil and a voltage secondary coil, wherein the voltage primary coil and the voltage secondary coil are wound on the voltage iron core, and the voltage primary coil is connected with the current primary coil through a high-tension cable which is arranged in the linear cavity. The combined transformer disclosed by the invention is suitable for an outdoor mutual inductor of 35kV and above, and has the advantages of small volume and high working stability.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a 35kV castable combined transformer. Background technique [0002] In the prior art, voltage transformers and current transformers of 35kV and above are installed separately and need to be installed independently, resulting in high cost of raw materials, time-consuming and laborious processing, increased processing costs, cumbersome installation, and large space occupation. And the low-voltage transformers usually used for measurement are casting type, and the high-voltage or ultra-high-voltage sealed gas-insulated (such as sulfur hexafluoride) transformers are also casting type. The casting type is suitable for voltage transformers below 35kV, and the products of 35kV and above are all oil-immersed. For oil-immersed voltage transformers or current transformers, since they are placed outdoors for a long time, they will inevitably be affected by rain, snow, and fog. The imp...

AI Technical Summary

Problems solved by technology

The casting type is suitable for voltage transformers below 35kV, and the products of 35kV and above are all oil-immersed. For oil-immersed voltage transformers or current transformers, since they are placed outdoors for a long time, they will inevitably be affected by rain, snow, and fog. Influenced by it, it will cause its body to be damp and cause transformer failure; and oil-immersed transformers also have common faults such as overheating, internal discharge, oil leakage, ferromagnetic resonance, etc., which require frequent maintenance

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