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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。