ENV 50231 : 1997

Contents
Foreword
Introduction
1. Scope
2. Normative references
3. Definitions, symbols and abbreviations
     3.1 Definitions
     3.2 Symbols and abbreviations
4. General requirements
     4.1 General characteristics
     4.2 Operating conditions
     4.3 Power transformer
     4.4 Regulation
     4.5 Efficiency
     4.6 Power factor
     4.7 Load matching
     4.8 Remote control system
     4.9 Control response and output current limitation
     4.10 Circuit isolation
     4.11 Wiring and connections
     4.12 Protective devices
     4.13 Electromagnetic compatibility
     4.14 Temporary losses of power source
     4.15 Control and monitoring panel
     4.16 Design and construction: HV/LV separation -
          Safety
     4.17 Optional auxiliaries
5. Type and production tests
     5.1 Safety prescription
     5.2 Type tests
     5.3 Routine production tests
     5.4 Requalification tests
6. Tests description
     6.1 Type tests
     6.2 Ambient temperature tests
     6.3 Environmental tests
     6.4 Requalification test description
     6.5 Routine production tests
7. Classification and designation
     7.1 Classification
     7.2 Marking, labelling, packaging
     7.3 Manual

Covers current regulators used in series circuits of aviation ground lighting installations. Applies to constant regulator assemblies, that include monitoring and control devices that are used for supply of a constant current to series connected light sources in airfield lighting systems.