Box-type transformation unit comprising bus connecting devices

Abstract

The invention provides a box-type transformation unit comprising bus connecting devices, which comprises a mounted ring main unit and a distribution transformer, and also comprises three bus connecting devices. Each bus connecting device comprises two bus insulators and a full insulating bus system; each bus insulator comprises an insulating cover and an electric contact; the insulating cover is barrel-shaped and the electric contact is cylindrical and sealed and fixed in the center of the insulating cover to penetrate the insulating cover; the central axis of the electric contact is overlapped with that of the insulating cover; the bottom of the electric contact is provided with a screw hole for mounting a bus; the full insulating bus system comprises two connectors and a busbar; the connectors are T-shaped and in a hollow barrel shape; the busbar comprises a conductive body and an insulating sheath; the insulating sheath is in a hollow round barrel shape; the conductive body is cylindrical and penetrates the insulating sheath; the central axis of the conductive body is overlapped with that of the insulating sheath; and the top of the electric contact is provided with a screw hole and is connected with the conductive body through a bolt. The box-type transformation unit has the advantages of compact structure and small occupied space; and the bus connecting devices are reliable and safe, and easy to install.

Description

technical field [0001] The invention belongs to the technical field of electric power distribution, and in particular relates to a box-type transformer unit with a bus connection device. Background technique [0002] Box-type transformer unit is an important power distribution equipment. [0003] The existing box-type transformer unit includes ring main unit and distribution transformer. There are three input terminals, three fuses, three overvoltage and overcurrent protectors, three switches and three busbars in the case of the ring network cabinet. There are three insulating porcelain bottles on the case, and the three input terminals pass through three single-core cables. Or the three core cables in a three-core cable are connected to the three phase lines of the transmission network, and the electric energy of the transmission network enters the ring network cabinet in three ways through three input terminals, and each way contains fuses, overvoltage and overcurrent pro...

AI Technical Summary

Problems solved by technology

[0005] 1. In order to realize the cable connection between the ring network cabinet and the distribution transformer, it is necessary to consider the bending radius of the cable installation and the working space of the construction personnel, which requires a considerable space between the ring network cabinet and the distribution transformer. space, resulting in a box-type transformer unit with an uncompact structure and a large space, which limits the scope of use of the unit to a certain extent.

[0006] 2. The technical level of the construction personnel is uneven, and the cable connection has certain technical requirements, and the steps of the connection operation are complicated. The connection between the ring main unit and the distribution transformer is often unreliable due to human facto

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