LEGRAND KEOR HP 400kVA Installation Et Démarrage page 17

Installation and start-up of UPS Keor Hp 400-800kVA
Installation et démarrage de l'UPS Keor Hp 400-800 kVA
Installazione e avviamento UPS Keor Hp 400-800kVA
2.3.7 Maintenance
Service and repairs must be carried out by skilled and authorized personnel. Before carrying
out any maintenance operation, UPS KEOR HP must be disconnected from AC and DC supply
sources.
The device is provided with internal isolators which allow to isolate the internal power circuits.
However the voltages of the supply sources are present on the terminals. To isolate the device
completely, provide external circuit breakers on the lines.
The device contains dangerous voltages even after shutdown and disconnection from the
supply sources, due to the internal capacitors which discharge slowly. Thus we recommend to
wait at least 5 minutes before opening the device doors.
Injury hazard due to electric shock!
Any operation must be carried out only when voltage is absent and in compliance
with safety directives.
 Make sure the battery circuit breaker that may be placed near the battery has
been opened.
 Isolate the device completely by operating the external circuit breakers.
 Wait at least 5 minutes in order to allow the capacitors to discharge.
After switching off and disconnecting the device there still might be very hot components
(magnetic parts, heat sinks); therefore we recommend to use protective gloves.
High temperature of components
It is strongly recommended to use protective gloves due to the high temperatures that
may be reached during the operation.
Sectioning of the neutral conductor
The UPS KEOR HP is provided with a sectioning device of the neutral conductor.
The sectioning of the neutral conductor allows the electrical isolation of the UPS
internal parts in order to avoid, during a maintenance or repair, possible operations of
the protective devices on the UPS supply line.
The neutral sectioning device can be opened only when the UPS is in MANUAL
BYPASS operation.
It is mandatory to reconnect the neutral sectiong device before re-starting the UPS.
OMD39075 REV. F 17