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为什么配电箱要设置分级掩护?来源:幸运彩平台

weishenmepeidianxiangyaoshezhifenjiyanhu?guranshiweileningjinga。hanjiandefenjiyanhuputongyousanji:

peidiangaoyashuchuzhuangbeishezhizongpeidianyanhu(diyijiyanhu),fenlushezhichengerjiyanhu,jieweiyongdianfuheshuchuzezaizhuangpeiyitaojieweiyanhu(chengweidisanjiyanhu)。

peidianxiangfenjiyanhuxingshixiangjie。

1、gaoyagongdiantixizongyanhu(yijiyanhu)。

zheiyijiyanhukezhuangsheyupeidianbianleqigaoyachuxianchu,qiyanhuguimoweigaoyadianwangdemuxian(huoguganxian)。dangguimoneidexianlujizhuangbeichanshengdayucanshengdianhuojucuoyanhuqiewaijucuodianliuzhidedanxiangjiedimaobingshi,canshengdianhuojucuoyanhuqidangjijucuodujiedianyuan。qijucuodianliuzhidetiaoxuanshiyeluduidijueyuandianzuhuanjing,yizuidaxiedianzhidebeiweihao。

2、zhongjiyanhuhemojiyanhu(erjiyanhu)。

zhongjiyanhuzhuangsheyuganxianhuoganxianshouduanhuofenzhishuduan,qiyanhuguimoweiganxianlucanshengdianliuhuodanxiangchanshengduidieranxiedian,tongshiyezuoweijieweicanshengdianliuyanhuqidehoubeiyanhu。jucuodianliuzhidetiaoxuanyingdayujieweixiedianyanhuqijucuozhideyibeiyishangweihao。

3、mojiyanhuzhuangpeizhuangsheyunengyuan、hukouyongdiandianyuanduan,zheiyijishouyaoyibimianrenshendazhangdaidiantierchanshengchudianbianluanweimubiao,qijucuodianliuzhihejucuoshihouyingxiaoyuhuojishi30ma/0.1s。

fenjiyanhudejijiandiaoheyingdangbaozhangzaibenjiyanhulonggaimianzhongdefenzhichanshengxiedianmaobingshi,yingshibenjixiangyingqiludecanshengdianliuyanhushunsuijucuoerbuchanshengyuejitiaozha。jianlvedian,shezhiyijiyanhushideewaijucuodianliuyaodayujitiaofenluerjiyanhudeshedingzhi。zongyanhushezhiputongtiaoxuan300~500ma,fenduanshihoutiaoxuan<0.5s;erjiyanhushezhicanshengdianliuewaizhiputongtiaoxuan100~200ma,fenduanshihoutiaoxuanshezhicheng<0.3s;mojicanshengdianliuputongdoushilaoguwei30mazhi,cishitadefenduanshihoudoushi<0.1sde。shangshutamensanzhezhijianfenjiyanhudejijiandiaohehenzhuyao。ruoshizaicanshengdianliuyanhuqizhongdeshezhibutuo,huixingchengyuejitiaozha。

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