Insulating single-inserting sheet of in-phase double-circuit parallel connection transition conductor

Abstract

The invention discloses an insulating single-inserting sheet of an in-phase double-circuit parallel connection transition conductor. In the insulating single-inserting sheet, a single-side contact connecting sheet (2) of the in-phase double-circuit parallel connection transition conductor is arranged on one side of an insulating plate (1), and is composed of a first transition parallel connection conductor (21) and a second transition parallel connection conductor (22) in a parallel connection mode, and a transition conductor insulating layer (23) is arranged between the first transition parallel connection conductor (21) and the second transition parallel connection conductor (22); a locating insulating block (3) is arranged on the outer side of the single-side contact connecting sheet (2) of the in-phase double-circuit parallel connection transition conductor, an insulating sleeve (4) penetrates through the center of the insulating plate (1), the center of the single-side contact connecting sheet (2) of the in-phase double-circuit parallel connection transition conductor and the center of the locating insulating block (3), and an insulating bolt hole (5) is formed in the middle of the insulating sleeve (4). Due to the fact that a two-phase insulating double-inserting sheet of the in-phase double-circuit parallel connection transition conductor is utilized, the conductor material is saved, and the current-carrying capacity is improved.

Description

technical field [0001] The invention relates to a bus duct for electric power transmission or distribution, in particular to an insulated single-inserted sheet for a same-phase double-circuit parallel transition conductor used for a bus duct joint of a power frequency alternating current circuit. Background technique [0002] In power transmission and distribution lines, the cross-sectional area and surface area of ​​the conductor directly affect the current carrying capacity of the line, especially for AC lines with a power frequency of 50Hz or 60Hz, affected by the skin effect, the conductor surface area and the current carrying capacity have a greater relationship Direct relationship. Because resistance will convert electrical energy into heat energy, and the busway system is a large current transmission and distribution line. In the transmission of current, the larger the capacity, the more concentrated the heat energy, the greater the resistance, and the line loss conti...

AI Technical Summary

Problems solved by technology

For 5000A busway, the cross-sectional carrying capacity is 3.5A / mm 2 , temperature rise below 60°C; 1600A bus duct cross-sectional carrying capacity reaches 4.4A / mm 2 , the temperature rise is below 50°C. It can be seen that compared with the ordinary busway technology, the same-phase double-circuit parallel conductor busway technology has made great technological breakthroughs in terms of resource saving, current carrying capacity and resistance temperature rise. However, due to The same-phase parallel conductors are limited to 1.0-2.5mm, which has already utilized the surface area to the extreme, and the bolt connection hole makes the loss of the surface and cross-section of the joint transition conductor inevitable, and the joint has the problem of contact resistance. If the above problems cannot be solved, the joint part Overheating will occur. How to increase the surface area and cross-sectional area of ​​the transition conductor in the case of single-sided contact of the conductor parallel busbar joint to reduce the current density and increase the current flow. At the same time, consider the contact resistance to make the transition conductor in the case of rated current. The joint device technology is a major problem that is difficult to break through, which limits the development of parallel conductor bus duct technology. If the parallel conductor bus duct technology is to be industrialized, the same-phase dual-circuit parallel bus duct joints will be perfected. Technology is an important link and an essential key technology

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