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3.4.1 Safety
Earth
The safety earth cable must be connected to the earth BUS BAR and to each cabinets in the
system and also the earthing and neutral bonding arrangements must be in accordance with the
local laws.
ATTENTION!!!
Failure to follow adequate earthing procedures can result in electric shock hazard
to personnel, or the risk of fire.
3.4.2 Cable Connections
ATTENTION!!!
All the cable connections of the UPS must be done by the authorized service
person. Once the equipment has been finally positioned and secured, connect the power cables as
described in the following procedure:
Split (External) By-Pass
Supply Connections
a.
The three white cables shown in
Figure 3-2 are removed.
b.
The three phase + neutral cables
coming from the split by-pass supply
are connected to terminals U3-V3-
W3 and N3.
c.
The three phase + neutral AC Input
cables are connected to terminals
U1-V1-W1 and N1, to supply the
necessary operational input power
of the UPS.
d.
Note that in this connection the
neutrals of the split by-pass supply
and the line are connected together.
e.
The split by-pass supply’s voltage
and frequency must be compatible
with the UPS output voltage and
frequency.
RECTIFIER
INPUT FUSES
BATTERY
FUSES
F1
F2 F3
+
BATT (+) BATT (-)
Figure 3-2-a 10-15-20 kVA
Cable Connections
WHITE
CABLES
Figure 3-2-b 30 kVA
Cable Connections
RECTIFIER
INPUT FUSES
BATTERY
FUSE
F1 F2 F3
+
INPUT
SUPPLY
S1
WHITE
CABLES
BATT (+) BATT (-)
