socomec Masterys Green Power, Installation And Operating Manual

Page: 14 / 62

IT
ALIANO
ENGLISH
14
IOMMASGPXX01-GB_01
10-40 kVA
3.4.1 Back-feed protection.
If the UPS does not have an automatic protection device against current back-feed, the operator/installer must add
a warning label to all the mains power disconnecting switches installed at a distance from the UPS area. This serves
to remind technicians of the fact that the circuit is connected to a UPS (see the CAUTION section in paragraph 2 of
this manual and paragraph 4.5.3. of the EN62040-1-1 2003-11 standard.
The label is supplied with the system.
The back-feed protection device may be built into the system (only on specific request), or an electromechanical
switch may be installed externally in the input of the UPS.
r *GUIF614JODPSQPSBUFTUIJTQSPUFDUJPOQSPDFFEXJUIUIFDPOOFDUJPOTBTEFTDSJCFEJOQBSBHSBQIPGUIJTNBOVBM
r 5PJOTUBMMUIFFYUFSOBMCBDLGFFEQSPUFDUJPOJUJTOFDFTTBSZUPVTFUIF#,'DBSEBOEBOFYUFSOBMFMFDUSPNFDIBOJDBM
switch that should be installed . For further information on the connection and the type of remote switch, please
read paragraph 10.9 of this manual.
ATTENTION.
The neutral is not disconnected as, even in the event of a single fault on the UPS, it never has high po-
tential when the mains and/or auxiliary power supplies are disconnected upstream. This is to prevent
transformation of the power source to the UPS every time there is a power failure.
If, in certain anomaly states, or because of the installation upstream (e.g. undetected and protec-
ted earth fault, or high leakage in a phase, or with IT systems) there is a hazardous potential on
neutral, a suitable isolating switch must be provided on the neutral as well, or else there must be
a detection, signalling and protection system.
NOTE.
For equipment with separate Emergency Mains, the neutral of the Emergency Mains line must be electri- For equipment with separate Emergency Mains, the neutral of the Emergency Mains line must be electri-
cally common with the neutral of the main input feed line.
3
UNPACKING AND INSTALLATION
OF THE UNIT