A type of PT handcart in the lower layer of a central cabinet

By introducing a frame structure and a detachable panel design into the lower PT trolley of the central switch cabinet, the problem of inconvenient wiring inspection of voltage transformers in the existing technology is solved, improving the ease of operation and structural strength, and adapting to the installation of large-size voltage transformers.

CN224459038UActive Publication Date: 2026-07-03JIANGHAI POLYTECHNIC COLLEGE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGHAI POLYTECHNIC COLLEGE
Filing Date
2025-08-04
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

The existing PT handcart chassis of the lower layer of the medium-voltage switchgear is an integral type, which makes it impossible to check the wiring of the voltage transformer from the rear, resulting in inconvenience in operation, especially when using large-size voltage transformers due to insufficient space.

Method used

A PT handcart with a central cabinet lower layer was designed. It adopts a frame structure with added upper and lower crossbeams, and the chassis has a detachable panel design. The aviation plug socket is moved from the top to the left side and is connected to the aviation plug through a bend. The cable runs out from the cable hole on the lower panel, providing more room for maneuver.

Benefits of technology

It enables convenient inspection of voltage transformer wiring, enhances the structural strength and safety of the handcart, and adapts to the installation requirements of large-size voltage transformers.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to the metal-enclosed switchgear KYN28-12, specifically a mid-voltage switchgear, and more particularly to a lower-level PT (potential transformer) trolley for the mid-voltage switchgear. The lower-level PT trolley is a shortened term for a lower-level voltage transformer trolley for the mid-voltage switchgear. The trolley includes a chassis, with a housing mounted on the top surface of the chassis. The housing includes a frame structure fixed to the chassis. An upper and lower crossbeam are located on the rear side of the frame structure, and a voltage transformer is installed between the upper and lower crossbeams. An upper panel and a lower panel are detachably connected from top to bottom on the rear side of the frame structure. The upper and lower panels are joined to seal the opening on the rear side of the frame structure. A cable pass-through hole is provided in the middle of the lower panel, through which a cable passes. One end of the cable is connected to the voltage transformer, and the other end is connected to an aviation connector. This utility model solves the problem of inconvenient testing in existing technologies.
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