ADB Safegate RELIANCE Intelligent Lighting Platform III, User Manual

Page: 96 / 118

A failure of a series circuits transformer caused by an inadequate circuit structure or dimensioning of the insulation is
unlikely to happen. Measure the current and voltage values at the supply connectors of the lights after replacing light
fixtures regularly to avoid failures. The effective voltage must not exceed 50 VAC from pole to pole of the supply
connectors. Measuring the voltage from of one of the connectors to ground potential is supposed to result in a leakage
current far below 1 mA. Replace the series circuit transformer as a precaution, if the measured values are untypically high.
•
Testing the readability of the SELV mark:
The readability of the SELV mark is to be verified and if necessary replaced when testing the installation, especially after
winter season. The work instructions for supply systems without SELV are to be applied, if there is no more visible mark.
Repairing Work
Use only the intended serious circuit transformers with a safe cut-out device for repair work.
DANGER
Series circuit transformers with a type power higher than 65 VA must not be used anyway (except the circuit is
equipped with SRU111 or SRU112). Comply strictly with a maximum series circuit voltage of 1000 VAC.
Modifications of the series circuit leading to a series circuit voltage higher than the one preset at commissioning are
prohibited. Follow the notes indicated on the power transformers of the regulator system. Modifications indicating that the
SELV principle was applied for the installation are to be authorized by the responsible airport department, circuit designer or
manufacturer, if extensions in the circuit are considered necessary.
Documented Maintenance and Repair Activities
Maintenance and repair works on a lighting system with serious circuit technology are regulated in “DIN EN 61821”.
All maintenance and repair works have to be executed with the system disconnected from the mains according to “DIN EN
61821. ” Live works on the secondary side of series circuits are only allowed following the safety requirements, if works are
based on the hazard analysis for a systemic integration of “DIN EN 62870” (SELV based power supply). The safety
requirements include that workers wear PPE for a voltage level up to 50 VAC and regular testing of the insulation values of the
primary cables. This permission does not apply for transformer installation slots or other installation sites.
Tip
It is recommended for lighting operators to document all the maintenance and repair works on the serious circuits
with SELV power supply in a life cycle document to prove the compliance with the applicable requirements. Persons
working on series circuits are required to get written approvals and be given adequate safety training how to work on
serious circuits.
Important
The responsible airport personnel has to provide work instruction for workers on how to work on lighting systems in
the languages of the workers. The working instructions have to include all the required safety measures to be
undertaken.
RELIANCE Intelligent Lighting
Maintenance
84
Copyright
©
ADB SAFEGATE, All Rights Reserved