BS EN 60920:1991

Cooperating organizations
National foreword
Foreword
Introduction
Section One - General requirements
1. Scope
2. Definitions
3. General requirements
4. General notes on tests
5. Classification
6. Marking
Section Two - Safety requirements
7. Protection against accidental contact with live
     parts
8. Terminals
9. Provision for earthing
10. Moisture resistance and insulation
11. High-voltage impulse testing
12. Thermal endurance of windings
13. Ballast heating
14. Screws, current-carrying parts and connections
15. Creepage distances and clearances
16. Resistance to heat and fire
17. Resistance to corrosion
Appendices
A. Tests: General requirements and tests referring to
     Section Two
B. Particular requirements for thermally protected
     ballasts
C. The use of constants S other than 4500 in tw tests
D. Information for carrying out the heating tests of
     thermally protected ballasts
E. Explanation to ballast temperatures
F. Method for selection of varistors
Figures
Annex ZA (normative) Other international publications
quoted in this standard with the references of the
relevant European publications
Annex ZB (informative) National A-deviations
National annex NA (informative)
National annex NB (informative)
National annex NC (informative)

Covers ballasts for use on a.c. supplies up to 1000 V at 50 Hz or 60 Hz, associated with tubular fluorescent lamps with or without pre-heated cathodes operated with or without a starter or starter device and having rated wattages, dimensions and characteristics as specified in IEC 60081.