Special tool for short-circuit wiring of large transformer

By designing a special tool including insulating rods, wire collectors, jointing mechanisms and wires, the safety and efficiency of transformer short-circuit wiring operation in power system substations is solved, and the short-circuit wiring effect is achieved with simple operation, safe and efficient operation.

CN222653010UActive Publication Date: 2025-03-21JILIN POWER SUPPLY COMPANY STATE GRID JILIN ELECTRIC POWER
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Patent Information

Application Number
CN202420916083.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-29
Publication Date
2025-03-21
Estimated Expiration
2034-04-29

AI Technical Summary

Technical Problem

In power system substations, during the power outage and maintenance of transformers above 220kV, the transformer windings need to be short-circuited. However, due to the high-voltage casing position, the operation safety does not allow direct or ladder climbing connection, resulting in the high cost of use, long waiting time, safety hazards, and low working efficiency.

Method used

A special tool including an insulating rod, a wire retractor, a jointing mechanism and a wire is designed. The insulating rod is retractable. The wire retractor realizes the wire laying and retracting of the wire through the shell, a wire retracting disc, a spool shaft, a limiting card, a spring and a coil spring. The jointing mechanism controls the bending and trap of the wire through a gear transmission mechanism and a support rod.

Benefits of technology

The tool enables operators to operate alone, simplifies short-circuit connections of transformer high-voltage terminals, improves operational safety and efficiency, reduces usage costs, and adapts to the needs of different on-site environments.

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Abstract

The utility model discloses a special tool for short-circuit wiring of a large transformer, belongs to the field of electric power system detection equipment, and particularly relates to equipment for short-circuit wiring in an electric power system electrical test. Comprising an insulating rod, a take-up device, a shell, a take-up reel, a take-up shaft, a limiting clamping piece, a spring, limiting teeth, a coil spring, a knotting mechanism, a supporting rod, a transmission rod, a gear transmission mechanism, a wire and a circular ring. By means of the design, the transformer short-circuit wiring tool easy to operate is provided, short-circuit connection can be conducted on the high-voltage binding posts of the transformer through a single person, paying off of a wire is easier through the design of the take-up device, meanwhile, the wire can be slowly taken up under the action of the coil spring, and the wire is more stable when being connected with the binding posts of all phases; the telescopic insulating rod enables the device to adapt to more on-site environments; operation is easy and convenient, manpower and material resources are saved, detection efficiency is improved, and application and popularization in different environments are facilitated.
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