Multi-voltage-class combined ground wire for transformer substation

Abstract

The invention discloses a multi-voltage-class combined ground wire for a transformer substation in the technical field of ground wire structures, which comprises a ground terminal, a one-to-three ground wire electrically connected with the ground terminal, ground wire clamps electrically connected with the tail ends of branch lines of the one-to-three ground wire respectively, and insulating rods connected to the bottoms of the ground wire clamps, the grounding wire clamp is composed of a double-tongue spring type wire clamp and a clamping piece type wire clamp which are fixed back to back, the clamping piece type wire clamp comprises a vertically-arranged pneumatic telescopic cylinder, the upper end of the outer wall of the pneumatic telescopic cylinder and the top end of a telescopic rod of the pneumatic telescopic cylinder are connected with a lower clamping plate and an upper clamping plate respectively, the insulating rod is a hollow rod, and an air blowing device is arranged at the bottom end of the insulating rod. According to the multi-voltage-class combined ground wire, the double-power-connection-end combined design is adopted, so that the requirements of different devices on site for different power connection ends are met, the requirements of different voltage classes on site for insulating rods with different lengths are met, and one set of ground wire is suitable for multiple voltage classes.

Description

technical field [0001] The invention relates to the technical field of grounding wire structures, in particular to a substation multi-voltage grade combined grounding wire. Background technique [0002] When the equipment is in the maintenance state, it is necessary to hang the grounding wire on the equipment and short-circuit the three phases. In order to ensure the safety of the maintenance personnel, the operation and maintenance personnel are required to add the grounding wire during each switching operation to prevent the maintenance personnel from getting an electric shock. risk. When managing substations, it is necessary to reserve multiple types of grounding wires with multiple voltage levels, which is expensive and takes up a lot of space, and it is easy to cause ground wires to accumulate and is difficult to organize. [0003] The traditional three-phase short-circuit grounding wires of substations are connected together by ground wire clamps, insulating rods, and...

AI Technical Summary

Problems solved by technology

Substation management needs to reserve multiple types of grounding wires with multiple voltage levels, which is expensive and takes up a lot of space, and it is easy to cause accumulation of ground wires, which is difficult to organize

[0003] The traditional three-phase short-circuit grounding wires of substations are connected together by ground wire clamps, insulating rods, and three-phase short-circuit grounding wires. At the same time, different voltage levels correspond to different grounding wires. This requires the distribution of multiple transformers in each substation. The grade ground wire is not conducive to the inspection and replacement and regular maintenance of the ground wire by the operation and maintenance personnel, and it also leads to prolonging the time for the operation personnel to operate and arrange the ground wire every time the switch is operated.

The ground wire chuck is divided into double-tongue spring type and clamp type. Due to the limitation of the type of bottom wire connector, the efficiency is not high when the ground wire is hung each time, and the contact between the connector and the bus bar is not firm.

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