BS EN 60664-5-2007 低压系统内设备的绝缘配合.间隙距离和漏电距离小于或等于2mm的测定用综合方法

标准号：BS EN 60664-5-2007
中文标准名称：低压系统内设备的绝缘配合.间隙距离和漏电距离小于或等于2mm的测定用综合方法
英文标准名称：Insulation coordination for equipment within low-voltage systems - Comprehensive method for determining clearances and creepage distances equal to or less than 2 mm
标准类型：K31
发布日期：2007/12/31 12:00:00
实施日期：2007/12/31 12:00:00
中国标准分类号：K31
国际标准分类号：29.080.30
引用标准：IEC 60364-5-51-2005;IEC 60664-1-2007;IEC 60721-3-3-1994;IEC 60721-3-7-1995;IEC 60721-3-9-1993
适用范围：This part of IEC 60664 specifies the dimensioning of clearances and creepage distances forspacings equal to or less than 2 mm for printed wiring board and equivalent constructions,where the clearance and the creepage distance are identical and are along the surface of solidinsulation, such as the paths described in 6.2 of Part 12 (Examples 1, 5 and 11).The dimensioning in this standard is more precise than that provided by Part 1. However, if theprecision provided by this standard is not required, Part 1 may be applied instead.This standard can only be used in its entirety. It is not permitted to select one or more clausesfrom this standard and to use them in place of the corresponding clauses of Part 1. In addition,this part of IEC 60664 can only be used together with Part 1.When this Part 5 is applied to the dimensioning of clearances and creepage distances equal toor less than 2 mm, all clauses are used in place of the corresponding clauses given in Part 1.For clearances and creepage distances larger than 2 mm, and for solid insulation in general,Part 1 applies.NOTE 1 The limitation to distances equal to or less than 2 mm applies to basic or supplementary insulation. Thetotal distance of a reinforced or double insulation may be larger than 2 mm.This standard is based on the following criteria for dimensioning:– minimum clearances independent of the micro-environment (see Table 2);– minimum creepage distances for pollution degrees 1, 2 and 3 to avoid failure due totracking (see Table 4);– minimum creepage distances to avoid flashover across the insulating surface (seeTable 5).NOTE 2 For minimum creepage distances to maintain adequate insulation resistance, see Table A.2.NOTE 3 This standard is not applicable to micro-environmental conditions worse than pollution degree 3 orhumidity level 3.A test method is specified for allocating unclassified insulating material to the relevant wateradsorption group.