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Method for laying secondary side cable of single-stand rolling mill rectifier transformer

A rectifier transformer, single-frame technology, applied in the direction of cable laying equipment, etc., can solve problems such as cable heating, bias current, etc., to achieve the effect of ensuring safe operation of production and reducing downtime

Inactive Publication Date: 2020-02-21
MCC SFRE HEAVY IND EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for laying cables on the secondary side of a single-stand rolling mill rectifier transformer, which solves the problem that the existing laying method causes severe heating of the cable and the occurrence of bias currents

Method used

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  • Method for laying secondary side cable of single-stand rolling mill rectifier transformer
  • Method for laying secondary side cable of single-stand rolling mill rectifier transformer

Examples

Experimental program
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Effect test

Embodiment 1

[0029] There are 12 cables in the transmission bus of each transmission device on the rolling mill rectifier transformer, which are laid according to the laying method of the present invention, specifically implemented according to the following steps:

[0030] The first step is to divide the cables of the rectifier transformer into groups of three, and divide them into N groups. Each group of cables contains one U, V, and W phase-sequence cable. -1, N-2, N-3 are marked respectively in turn;

[0031] In the second step, the cables marked in the first step are divided into groups according to three different phases, grouped and tied into cable bundles, the N groups of cables divided in the first step are respectively tied, and the cross-section of the three cables in each group is Arranged in the shape of "pin";

[0032] In the third step, part of the cable bundles ligated in the second step is evenly distributed on the upper surface of the existing cable bridge (2), the clear...

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Abstract

The invention provides a method for laying secondary side cables of a single-stand rolling mill rectifier transformer. The method comprises the following steps: respectively marking each cable of therectifier transformer according to a phase sequence; dividing the cables marked in the step 1 into groups according to three different phases, binding the cables into groups of cable bundles, and arranging the cross sections of the three cables in each group in a delta shape; uniformly and dispersedly laying part of the bound cable bundles on the upper surface of an existing cable bridge, and fixing the cable bundles; fixedly arranging a plurality of layers of bakelite plates above the cable bridge; and uniformly and dispersedly laying the remaining cable bundles on the upper plate surfaces ofthe plurality of layers of bakelite plates, and fixing the cable bundles. The clear distance between two adjacent cable bundles is L, the outer diameter of the cable is D, and L is not less than twotimes of D. The invention provides a method for improving a secondary side cable laying mode of the single-stand rolling mill rectifier transformer. The method thoroughly solves the problem of severeheating of a cable caused by bias current when a plurality of cables are connected in parallel in a conventional transformer secondary side cable laying method.

Description

technical field [0001] The invention belongs to the technical field of mechanical and electrical equipment assembly, and relates to a method for laying cables on the secondary side of a single-stand rolling mill rectifier transformer. Background technique [0002] The single-stand rolling mill is a common cold-rolling equipment for strip steel in the domestic cold rolling industry. In a typical six-high HC rolling mill electric control system, one or more rectifier transformers (10kV / 0.66kV) are usually used to provide high-power Transmission power supply. Since the rated current of a single transmission device can reach 1500A, four single-core 240mm cables need to be used in parallel for each phase power supply cable. In some cases, this kind of laying method will cause severe heating of the cable from the secondary side of the rectifier transformer to the transmission device, and serious bias current phenomenon will occur in the cable. Contents of the invention [0003...

Claims

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Application Information

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IPC IPC(8): H02G1/06
CPCH02G1/06
Inventor 杨小勇任福平李宇丁频杨婧张贤梁慧娟
Owner MCC SFRE HEAVY IND EQUIP
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