Discussion on 2 × 27.5 kV Bipolar Vacuum Circuit Breaker Insulation Class

ZHAI Tie-jiu1; TU Da-shi2; WANG Yan-nan3

doi:10.13296/j.1001-1609.hva.2012.02.021

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Discussion on 2 × 27.5 kV Bipolar Vacuum Circuit Breaker Insulation Class

更新时间：2025-04-26

- Discussion on 2 × 27.5 kV Bipolar Vacuum Circuit Breaker Insulation Class
- High VoltageApparatus Vol. 48, Issue 2, Pages: 102-106(2012)
- 作者机构：
  
  1. 铁道部工程管理中心
  2. 2. 北京东方昱立电气技术有限公司
  3. 北京恒通达电气有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2012.02.021
  CLC： TM561.2
- Published：2012
- 稿件说明：
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[1]翟铁久,涂大石,王燕楠.关于2×27.5kV双极真空断路器绝缘等级问题探讨[J].高压电器,2012,48(02):102-106.

ZHAI Tie-jiu1, TU Da-shi2, WANG Yan-nan3. Discussion on 2 × 27.5 kV Bipolar Vacuum Circuit Breaker Insulation Class[J]. High voltageapparatus, 2012, 48(2): 102-106.
[1]翟铁久,涂大石,王燕楠.关于2×27.5kV双极真空断路器绝缘等级问题探讨[J].高压电器,2012,48(02):102-106. DOI： 10.13296/j.1001-1609.hva.2012.02.021.

ZHAI Tie-jiu1, TU Da-shi2, WANG Yan-nan3. Discussion on 2 × 27.5 kV Bipolar Vacuum Circuit Breaker Insulation Class[J]. High voltageapparatus, 2012, 48(2): 102-106. DOI： 10.13296/j.1001-1609.hva.2012.02.021.

摘要

电气化铁路牵引供电系统2×27.5 kV双极真空断路器用于自耦变压器供电方式的接触网馈电线路的接通与开断。根据现行的铁路标准

该类型断路器灭弧室断口采用了27.5 kV额定电压等级的绝缘水平。笔者通过对接触网（T线）和正馈线（AF线）之间非接地短路故障的分析发现:当该断路器开断此类短路故障时

两支断口承受的短路电压一般是不平衡的

其中某一断口承受的电压将超过其绝缘耐受水平

严重劣化其开断短路电流条件

可能造成绝缘损坏甚至爆炸事故。因此建议:提高现行2×27.5 kV双极真空断路器绝缘水平的铁路标准;在现有断路器的2个断口上并联均压电容

平衡电压;增加该类型断路器双断口实际均压情况以及同步性开断试验项目。

Abstract

The 2×27.5 kV bipolar vacuum circuit breaker of electrified railway traction power supply system is used to auto-transformer supply catenary feeder circuit switched on and off.According to the current railwag standard

this type circuit breaker arc-extinguishing chamber fracture using 27.5 kV rated voltage insulation level.This article through the contact line（T line） and positive feeder（AF line） between non grounding fault analysis: When the circuit breaker breaking such short circuit faults

two fracture under short-circuit voltage are generally not balanced

one fracture under voltage will exceed its insulation tolerance level

serious deterioration of its breaking short circuit current conditions

may cause insulation damage or even explosion accident.It is suggested that: increase the current railway standard requirements for insulating level of 2×27.5 kV bipolar vacuum circuit breaker;parallel existing circuit breaker grading capacitor on both fracture

voltage balancing;increase this type circuit breaker double fracture actual pressure and synchronous breaking test item.

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