Metal-clad voltage transformer

By designing a metal-armored voltage transformer, using a No. 3 external cone plug and a metal mounting plate, the problem of semi-insulated voltage transformers being unable to be tested at power frequency was solved, achieving convenient installation and efficient testing, and improving insulation performance and safety.

CN224437378UActive Publication Date: 2026-06-30TAIPINGYANG POWER EQUIP GROUP CHANGZHOU +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
TAIPINGYANG POWER EQUIP GROUP CHANGZHOU
Filing Date
2025-06-26
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing semi-insulated voltage transformers cannot be tested using power frequency insulation testing equipment, and 150Hz testing equipment is inconvenient for field use, making testing difficult.

Method used

The design incorporates a metal-clad voltage transformer, employing a No. 3 external cone plug and a metal transformer mounting plate to enhance insulation performance. Convenient installation and disassembly are achieved through bolt connections. The metal-clad housing is directly grounded to the switchgear, optimizing the voltage transformer structure.

Benefits of technology

It enables the testing of semi-insulated voltage transformers on power frequency insulation testing equipment, improving insulation performance and disassembly/reassembly efficiency, and enhancing safety and reliability.

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Abstract

This utility model discloses a metal-armored voltage transformer, including a base plate on which a metal-armored housing is connected. A transformer mounting plate is connected to the side of the metal-armored housing and the base plate. The transformer mounting plate has multiple first mounting holes and multiple second mounting holes. External conical plug-in heads are bolted to the second mounting holes. The ends of the external conical plug-in heads are formed with mounting flanges, which are fixed to the transformer mounting plate through the second mounting holes. The armored housing includes a top and a bottom. The first mounting holes are distributed on both sides of the top. The insulating area of ​​the external conical plug-in head of this utility model (model No. 3) is larger than that of the external conical plug-in head of model No. 2, significantly improving the insulation performance of the voltage transformer. Furthermore, the transformer mounting plate is a metal plate, making the metal-armored housing a metal material, facilitating grounding and further improving the insulation performance of the voltage transformer.
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