CLC/TC 97 - Electrical installations for lighting and beaconing of aerodromes

This International Standard specifies the requirements for a Constant Current Regulator (CCR) having a nominal output of 6,6 A for use in an aeronautical ground lighting constant current series circuit. However CCRs may be manufactured which have a different power rating (kVA) and current steps than those specified in this standard in order to be used on existing circuits. This standard shall be applied where appropriate for these CCRs.

This standard covers constant current regulators used in series circuits of aviation ground lighting installations. This prestandard is applicable to constant current regulator assemblies, including control and monitoring devices, used for supply of a constant current to series connected light sources in airfield lighting systems. The Constant Current Regulator is designed to produce a constant current output independent of variations in the circuit load or, in some limits , of variations in the input voltage to the Constant Current Regulator. The object is to provide equipment specifications and tests for constant current regulators used on airport that are considered necessary to meet the operational standards adopted by ICAO and to cover all aspects of safety (electrical, thermal and mechanical). This prestandard is in accordance with ICAO Annexe XIV. In any case, any new operational need for Air Navigation Safety purposes could change some data or principles issued in this prestandard.

D105/108: Lifetime of ENV extended up to 2002-11-01 * D117/066: ENV withdrawn with immediate effect