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接线端子国家标准

2013-12-19 8:29:39      点击:

序号 标准号 标准名称 批准或发布日期 实施日期
新标准 老标准 新标准 老标准
1 GB/T14048.1 低压开关设备和控制设备 总则 2000-10-17 1993-01-04 2001-07-01 1993-07-01
2 GB14048.2 低压断路器 2001-11-21 1994-04-12 2002-11-01 1994-12-01
3 GB14048.3 开关、隔离器、隔离开关及熔断器组合电器2002-06-13 1993-09-05 2003-01-01 1994-04-01
4 GB14048.4 机电式接触器和电动机起动器 2003-09-10 1993-09-05 2004-05-01 1994-04-01
5 GB14048.5 控制电路电器和开关元件 2001-11-02 1993-09-05 2002-06-01 1994-04-01
上述5份新标准,等效采用IEC60947.1~5的同名标准。考虑到我国的实际环境条件,在GB14048.1-2000附录K中增加了恒定湿热和交变湿热二种耐湿性能要求和试验方法,并要求产品标准应根据自身特点选择相应的耐湿性能的考核方法。
2. 新老标准的主要差异
2.1 主要共同差异
上述5份新老国家标准的主要共同差异有:
a.新标准取消了老标准中的一些结构和材料性能方面的要求。如耐振动、耐冲击、耐撞击、弹性部件耐老化、耐低温和(高温)性能、耐热性能、抗锈性等。
b.新标准的电磁兼容性包括抗干扰度(浪涌抗扰度、电快速瞬变/脉冲群抗扰度、射频电磁场辐射抗扰度和静电放电抗扰度)和发射(辐射和传导)。而老标准只有抗电磁干扰(抗高频传导干扰、抗高频辐射干扰、抗低频传导干扰和抗浪涌过电压传导干扰)的要求。
c.新老标准主电路的工频介电试验电压值的差异见表2。
表2 主电路的工频介电试验电压值的差异
额定绝缘电压Ui
(V) 工频介电试验电压值
(有效值)(V)
Ui≤60 1000
60<Ui≤300 2000
300<Ui≤690(老标准660) 2500
690(老标准660)<Ui≤800 3000
800<Ui≤1000 3500
1000<Ui≤1500(仅用于DC) 3500(老标准4200)
d.新标准中对型式试验的试品数量未作明确规定,而老标准中规定每项试验至少为2台。
e.新标准中删去了老标准中的定期试验。
f.新标准中将寿命试验(机械寿命和电寿命试验)列为特殊试验项目,老标准中寿命试验为型式试验项目。
g.新标准中删去老标准中的运输、贮存等试验。

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