住宅电气故障分析及其改进设计.doc

住宅电气故障分析及其改进设计
山西省医药规划设计院(有限公司) 　杨兆庆1)
摘　要　例举了住宅居民用电中发生的一些电气故障,分析了造成事故的原因,提出了在电气设计方面需要
注意的若干事项及改进措施。
关键词　电气故障　接触电阻　漏电保护

　　近年来住宅用电负荷不断增长,造成电气线路长时间处于过载状态,导致绝缘老化,电气事故不断发生。据消防部门统计,我国电气火灾已位居火灾成因之首,其中住宅电气火灾
占全部火灾的50 %以上。随着现代社会文明程度的提高,人们不仅对用电安全提出很高要求,而且对可靠连续供电的要求也越来越高。
1 　电气故障及其原因分析
1. 1 　故障例举
例1 :某住宅入户处装有漏电断路器,但经常跳闸。测量户内电气线路无漏电,将漏电断路器的输出线路脱开,该断路器仍跳闸,因此断定为漏电断路器出故障。在拆卸断路器时看到出线桩头处胶木底座酥松,刮后有粉状物,表明漏电断路器出线端子因接触
Failure analysis and improvement of residential electrical design
Medical Planning and Design Institute of Shanxi Province (Limited) Yang Zhaoqing 1)
Abstract cites residents of some electrical power failure occurred, analyzes the reasons for the accident, put forward the need for electrical design
Note that a number of issues and improvement measures.
Key words electrical contact resistance fault leakage protection

In recent years, a growing residential electricity load, resulting in a long time in the electrical circuit overload condition, resulting in insulation aging, electrical accidents continue to occur. According to Fire Department statistics, the causes of electrical fires have been ranked first in the fire, in which residential electrical fires
50% of the total over the fire. With the improvement in the level of modern civilization, people not only make high demands on electrical safety, but also a reliable power supply continuously increasing demands.
1 Electrical Breakdown and Analysis
1.1 Fault cite
Example 1: A residential-home office equipped with residual current circuit breaker, but often trip. Measurement of indoor electrical wiring without leakage, the leakage circuit breaker output line was torn off and was still tripping the circuit breaker, so determined to be leakage circuit breaker fail. Saw the demolition breaker outlet crisp pile head office bakelite base, after shaving powder, that leakage circuit breaker outlet terminal contact with
 

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