Specification covers ballasts for operation of 50, 80, 125, 250, 400, 700, 1000 and 2000 w high pressure mercury vapor lamps on 50 cps supplies; it does not cover resistors or filament lamps used as ballasts; ballast is defined as any device controlling magnitude of current flowing through discharge path of lamp, and ballast rating as wattage of lamp with which ballast is intended to be used.
Specification for ballasts for high pressure mercury vapour discharge lamps operating on A.C. 50c/s supplies
Brit Standards Instn -- Brit Standard
1964
22 pages
Standard
English
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