Electrical installations for lighting and beaconing of aerodromes. Maintenance of aeronautical ground lighting constant current series circuits— 32 стр.
BS EN 50488. Railway applications. Fixed Installations. Electrical protective measures for working on or near an overhead contact line system and/or its associated return circuit— 43 стр.
Electrical installations for lighting and beaconing of aerodromes - Maintenance of aeronautical ground lighting constant current series circuits (IEC 61821:2011) (english version)
