BS 5622-2:1979
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Guide for insulation co-ordination Application guide
Hardcopy , PDF
04-15-1997
English
01-31-1979
National foreword
Cooperating organizations
Section one - Scope and reference to existing IEC
publications
1. Scope
2. Reference to existing IEC publications
Section two - Voltage stresses in service
3. General
4. Power-frequency voltages
5. Temporary overvoltages
6. Switching and lightning overvoltages
7. Determination of expected overvoltage levels
Section three - Insulation withstand
8. General
9. Insulation behaviour at power-frequency voltages
and temporary overvoltages
10. Probability of disruptive discharge of insulation
under impulse voltages
11. Apparatus with windings
Section four - Protective devices
12. General
13. Non-linear resistor-type surge arresters
14. Expulsion-type surge arresters
15. Spark gaps
16. Application of different protective devices
Section five - Coordination between stresses and
withstand considerations common to ranges A, B and C
17. Insulation design to power-frequency operating
voltage and temporary overvoltages. Problems of
pollution and ageing
18. Pollution
19. Ageing
Section six - Coordination between stresses and
withstand in voltage range A
20. Selection of the rated power-frequency withstand
voltage
21. Selection of the rated lightning-impulse withstand
voltage
Section seven - Coordination between stresses and
withstand in voltage range B
22. Selection of the rated power-frequency withstand
voltage and the rated lightning-impulse withstand
voltage
Section eight - Coordination between stresses and
withstand in voltage range C
23. Insulation design with respect to power-frequency
voltage and temporary overvoltages
24. Insulation design with respect to switching and
lightning overvoltages
25. Block-diagram of the insulation design and
coordination of an electrical installation
Appendix A - Surge transference through transformers
Appendix B - Validity of the tests in Clauses 52, 53
and 54 of IEC Publications 71-1
Appendix C - Statistical evaluation of the protective
effect of spark gaps
Appendix D - Examples of application
Appendix E - Clearances in air between live conductive
parts and earthed structures to secure a
specified impulse withstand voltage for
dry conditions
Tables
Figures
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