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  • BSI
    BS 7822-3:1995, IEC 60664-3:1992 Insulation coordination for equipment within low-voltage systems - Use of coatings to achieve insulation coordination of printed board assemblies
    Edition: 1995
    $316.70
    / user per year

Description of BS 7822-3:1995 1995

This part of IEC 664 applies to rigid printed board assemblies with an insulating coating applied to one or both sides of the printed board. Such coatings are used to provide insulation and to protect the microenvironment of the printed board assembly surface against pollution, for the purpose of insulation coordination. It describes the requirements and test procedures for printed board assemblies provided with coatings.

This part covers two types of coatings:

  • type A coating only provides protection against pollution. The clearance and creepage distance requirements of IEC 664-1 apply to the printed board assembly under the coating;
  • type B coating provides protection against pollution and insulation. There are no requirements for clearances and creepage distances under the coating. Only the requirements of IEC 664-1 for solid insulation apply.

NOTE 1 For type B coating, the conductors are embedded in solid insulation consisting of the base material and the coating.

NOTE 2 Clearances and creepage distance requirements apply to all uncoated parts of the board and between conductive parts over the coating.

The principles in this part are applicable to functional and basic insulation.

NOTE 3 For supplementary and reinforced insulation, additional requirements, which are under consideration, may apply.



Standard NumberBS 7822-3:1995, IEC 60664-3:1992
TitleInsulation coordination for equipment within low-voltage systems - Use of coatings to achieve insulation coordination of printed board assemblies
StatusDefinitive
Publication Date1995-11-15
Identical National Standard OfIEC 60664-3:1992
DescriptorsStress, Design, Voltage, Temperature, Assembling, Performance, Electrical equipment, Visual inspection (testing), Environmental testing, Electrical insulating materials, Clearance distances, Printed-circuit boards, Coordination, Leakage paths, Coatings, Clearances, Pollution, Electrical insulation, Low-voltage equipment, Quality control, Grades (quality), Electrical conductivity, Electric conductors, Dimensions, Sampling methods
ICS29.080.01 Electrical insulation in general
CommitteeGEL/109
ISBN0 580 24554 3
PublisherBSI
Pages20

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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