ADB Safegate RELIANCE Intelligent Lighting Platform III, User Manual

Page: 94 / 118

The operational factors concerned are crucial in deciding on the maintenance intervals applying. A high volume of traffic at
the airfield will necessitate shorter maintenance intervals, so that a maintenance schedule should be modified after several
months of operation. You will find more maintenance instructions in the relevant device and system manuals.
5.3 Maintenance Notes for EN 62870 systems
This document applies to series circuits with an systemic approach and no additional suppressor circuit in which lights are
supplied with power using a Safety Extra-Low Voltage (SELV, according to EN 62870). The notes are meant to be a
supplementary info to the project-specific documents delivered with the product data sheets and the maintenance
instructions in the maintenance section.
CAUTION
Warning — unauthorized changes in the installation may lead to death or serious injuries when
touched while the system is not disconnected from supply voltage due to loss of safety extra-low
voltage during operation
Do not change the installation in a manner not intended by the manufacturer, designer or the
responsible airport technicians
Unintended changes include the following actions:
•
Increase the preset supply voltage
•
Integration of series circuit transformers not released for use with the installation
•
Integration of transformers with increased type power
•
Grounding of a pole of the lights’ power supply
DANGER
Be careful when working on the system as the supply of the lights with Safety Extra-Low Voltage does not make
the installation site safe by itself (the installation slot for the transformer or contact points with installation below
the lights). Keep in mind that there are still high voltages in the serious circuit and follow the safety precautions.
Remember
The positive completion of the self-test is not a license for the user to rely on this functionality blind. An occasional
check of the output voltage (lamp failure) during a lamp change is considered useful.
As the secondary side of the light-transformer is a current source, it is necessary to actively clamp the voltage. This
could be provided by an electronic circuit which has to be checked cyclically to detect if the functionality is still
active.
Using an active voltage limiter like SRU111 and SRU112 to meet the requirements of EN 62870, Safety Extra-Low
Voltage, is not intended to allow people to work on powered circuits, but is meant to add an additional protection
for example in case someone forgot to switch off the circuit.
Make sure that the power to the series circuit is OFF when working on the installation. Follow all common safety
rules for working on electrical installations, when carrying out maintenance or installation.
CAUTION
Electrostatic Sensitive Devices
Disconnect all serious circuits from voltage and ground the circuits before working on the installation in
the slot — only work using Personal Protective Equipment (PPE) if one or more circuits keep supplied
with power (see EN 61821).
Risk of electrostatic shock
RELIANCE Intelligent Lighting
Maintenance
82
Copyright
©
ADB SAFEGATE, All Rights Reserved