Introduction to Differences Between IEC 60947-1:2020 Low-Voltage Switchgear and Controlgear - Part 1: General Rules and GB/T 14048.1—2012

doi:10.16628/j.cnki.2095-8188.2022.08.013

Abstract

Abstract:

To improve the development and design, manufacturing,testing and certification of low-voltage equipments,and guide users to correctly use domestic and foreign standards,the differences between IEC 60947-1:2020 Low-Voltage Switchgear and Controlgear - Part 1:General Rules and GB/T 14048.1—2012 were analyzed in the aspects of scope,terms and definitions,characteristics,product data and information,structure and performance requirements,test and annex.

Key words: low-voltage switchgear, low-voltage controlgear, standard, difference

CLC Number:

TM52

CHEN Xueqin. Introduction to Differences Between IEC 60947-1:2020 Low-Voltage Switchgear and Controlgear - Part 1: General Rules and GB/T 14048.1—2012[J]. LOW VOLTAGE APPARATUS, 2022, 0(8): 71-75.

Figures/Tables 3

GB/T 14048.1—2012

IEC 60947-1:2020

3)固体绝缘的工频耐受电压的验证
c)试验电压的施加
根据上述2)c)的项①、②、③的规定,试验电压应施加5 s

3)固体绝缘的工频或直流耐受电压的验证
c)试验电压的施加
根据上述2)c)的项①、②、③的规定,试验电压应施加60 s;产品标准可以将试验持续时间提高到60 s;对于已经根据之前版本文件进行了型式试验的电器,无需再进行60 s试验

4)电器分断试验和短路试验后工频耐受电压试验
b)试验电压
上述3)b)适用,但试验电压值为2U_e,最小值为1 000 V(有效值)。
如果交流电压试验不适用,则直流试验电压的最小值为1415V。U_e为进行上述分断试验和/或短路试验的试验值

4)电器分断试验和短路试验后工频或直流耐受电压试验
b)试验电压
上述3)b)适用,但试验电压值为2U_e,最小值为1 000V(交流有效值)或1 415 V(直流)。U_e为进行上述分断试验和/或短路试验的试验值
交流电器无法以交流电压进行试验时(如由于EMC滤波器组件),应使用直流电源进行试验,试验电压为2×

2

U_e,最小值为1 415 V(直流)。如产品标准有要求时,应按此规定;对于已经根据之前版本文件进行了型式试验的电器,无需对直流电路再进行直流试验

References 9

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试验类型	试验电流的选取			备注
试验类型	最大截面积	最小截面积		备注
电气性能试验	试验电流为I_th(或I_the)。	表9(试验电流为400 A及以下的试验铜导线)给出了试验电流。或者,根据制造商要求,可以使用额定I_th(或I_the)代替。	考虑到实际情况,具体试验要求在产品标准中规定。
老化试验	试验电流为I_th(或I_the)。	IEC 60947-7-1:2009《低压开关设备和控制设备第1-1部分:辅助器件铜导体的接线端子排》的表4(对于公制尺寸导线进行温升试验、老化试验、电压降试验时的试验电流值)和表5(对于AWG或kcmil尺寸导线进行温升试验、老化试验、电压降试验时的试验电流值)给出了试验电流。	考虑到实际情况,具体试验要求在产品标准中规定。

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