IEC 62870-2015 pdf free download.Electrical installations for lighting and beaconing of aerodromes – Safety secondary circuits in series circuits – General safety requirements.
4.5.2 Limits of immunity
The SELV/PELV supply shall comply with the requirements given in the generic standard for industrial environments IEC 61000-6-2. The immunity limits and methods of measurement of CISPR 22 shall be complied with.
4.6 Marking
4.6.1 Marking of the SELVIPELV power supply
Each SELV/PELV supply of it shall be permanently marked. The marking shall contain the
following information:
• unambiguous type designation of the manufacturer;
• name of the manufacturer of the assembly;
• nominal input current:
• nominal output current:
• maximum output power (W and VA);
• marking of the assembly as class Ill (SELV) with symbol original 5180 of IEC 60417 (Roman Ill within a rhombus).
The SELV/PELV marking shall be available to maintenance personnel and easily readable in the normal installation position (see 4.7.4).
4.6.2 Marking at the installation locations
The location of a light fixture fed by a SELV/PELV power supply shall be marked as SELV/PELV. The marking shall be clearly readable to allow maintenance people to confirm SELV I PELV condition before starting any work on the installation. If the SELV/PELV supply will be replaced by a non-SELV/PELV supply the marking shall be removed or permanently covered.
4.7 Protection against electric shock
4.7.1 Basic requirements
Hazardous live parts shall not be accessible and accessible conductive parts shall not be
hazardous live
• neither in normal use without fault, nor
• under single fault conditions.
4.7.2 Protective measure to be applied
The protective mechanisms of the SELVIPELV supply shall not be lost if a single fault occurs.
For this purpose
• limitation of voltage at the output of the SELV/PELV supply and
• protective-separation of the SELV/PELV supply from all circuits other than SELV and PELV and
• simple-separation of the SELV/PELV supply from other SELV/PELV supply shall be provided.
For a SELV supply, operational earthing of active parts nor the intentional connection of parts to a protective conductor or to an earth conductor according to IEC 61140 is not permitted. Where the safety secondary system is explicitly defined as a PELV supply, the PELV circuits and/or exposed conductive parts of equipment supplied by the PELV circuit may be earthed.IEC 62870 pdf download.