Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys
新闻动态   News
搜索   Search
你的位置:首页 > 新闻动态 > 技术动态

DZ20塑料外壳式断路器

2014-2-13 10:23:02      点击:

DZ20塑料外壳式断路器1.表中所列规格用户根据需要选取,但在一台断路器中不应超过表中每格中所规定的项目。
2.辅助触头400A及以上为二常开二常闭,225A以下为一常开一常闭。
3.断路器有欠电压脱扣器和分励脱扣器。其电压规格交流有220V、380V,直流有110V、220V供四种。欠压脱扣器电压仅有交流规格。
4.报警触头均为一常开、一常闭触头;
5.壳架等级100A、225A中无248、258、278、348、358、378的规格。
*复式脱扣器——为带瞬时脱扣器和热脱扣器的脱扣器。
DZ20塑壳断路器是以Y型为基本产品,由绝缘外壳、操作机构、触头系统和脱扣器四个部分组成。断路器的操作机构具有使触头快速合闸和分断的功能,其“合”“分”“再扣”和“自由脱扣”位置以手柄位置来区分。
C型、J型和G型断路器是在Y型基本产品基础上派生设计而成(除C型160A外)。J型断路器是将Y型断路器的触头进行结构改进,使之在短路情况下,在机构动作之前,动触头能迅速斥开,达到提高通断能力的目的。
G型断路器是在Y型断路器的底板后串联的一个平行导体组成的斥力限流触头系统,该系统比J型的斥力触头长,断开距离也大,因此能更迅速的限流。
四级断路器中性极(N)不装脱扣元件,位于最右侧位置。在分合过程中,中性极规定为闭合时较其他三级先接触,分闸时较其他三级后断开。
C型断路器是为满足630KVA及以下变压器电网中的配电保护之需要,通过先用经济型材料的简化结构及改进工艺等办法,能够达到较好的经济效果。