I.S. EN 60921:2005

FOREWORD
INTRODUCTION
1 Scope
2 Normative References
3 Terms and definitions
4 General notes on tests
5 Marking
6 Voltage at terminations of lamp or starter (if any)
   6.1 For lamps operated with a starter
   6.2 For lamps operated without a starter
   6.3 For lamps operated without a starter (North
       American practice)
   6.4 Maximum (r.m.s.) voltage across starter terminals
       with lamp operating
   6.5 For lamps with integral means of starting
7 Pre-heating conditions
   7.1 For lamps operated with (integral) starter
   7.2 For lamps operated without starter
   7.3 For lamps operated without starter (North American
           practice)
8 Lamp power and current
   8.1 For lamps operated with (integral) starter
   8.2 For lamps operated without starter
9 Circuit power-factor
10 Supply current
11 Maximum current in any lead to a cathode
12 Current waveform
13 Magnetic screening
14 Impedance at audio-frequencies
Annex A (normative) Tests
   A.1 General conditions for tests
   A.2 Additional requirements for testing reference
       ballasts
   A.3 Selection of reference lamps
   A.4 Measurement of open-circuit voltage
   A.5 Measurements of pre-heating conditions
   A.6 Measurement of lamp power and current
   A.7 Measurement of maximum current in any lead to
       a cathode
   A.8 Measurement of current waveform
   A.9 Measurement of impedance at audio-frequencies
Annex B (informative) Series operation of two fluorescent
        lamps
Annex C (normative) Reference ballasts
      C.1 Marking
      C.2 Design characteristics
      C.3 Operating characteristics
Annex D (normative) Reference lamps
Annex ZA (normative) Normative references to international
         publications with their corresponding European
         publications
Bibliography

Provides performance requirements for ballasts, excluding resistance types, for use on a.c. supplies up to 1 000 V at 50 Hz or 60 Hz, associated with tubular fluorescent lamps pre-heated cathodes operated with or without a starter or starting device and having rated wattages, dimensions and characteristics as specified in IEC 60081 and 60901.