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  • BSI
    BS EN 60664-5:2007 Insulation coordination for equipment within low-voltage systems - Comprehensive method for determining clearances and creepage distances equal to or less than 2 mm
    Edition: 2007
    $473.45
    / user per year

Description of BS EN 60664-5:2007 2007

This part of IEC 60664 specifies the dimensioning of clearances and creepage distances for spacings 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 solid insulation, 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 the precision 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 clauses from 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 to or 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. The total 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 to tracking (see Table 4);

  • minimum creepage distances to avoid flashover across the insulating surface (see Table 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 or humidity level 3.

A test method is specified for allocating unclassified insulating material to the relevant water adsorption group.



Standard NumberBS EN 60664-5:2007
TitleInsulation coordination for equipment within low-voltage systems - Comprehensive method for determining clearances and creepage distances equal to or less than 2 mm
StatusDefinitive
Publication Date2007-12-31
ReplacesBS EN 60664-5:2003
Identical National Standard OfEN 60664-5:2007, IEC 60664-5:2007, EN 61951-1:2003
DescriptorsClearances, Low-voltage equipment, Electrical insulating materials, Electrical testing, Clearance distances, Measurement, Electrical insulation, Leakage paths, Solid electrical insulating materials, Humidity, Coordination, Printed-circuit boards, Electrical equipment
ICS29.080.30 Insulation systems
CommitteeGEL/109
ISBN978 0 580 57175 6
PublisherBSI
Pages48

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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