OPM_LPS_33E_10K_30K_4CN_V010.doc 30/82 Operating Manual LP 33 / 10-20-30 kVA
4.8 CONNECTIONS
WARNING !
The connections to and from the UPS must be executed by QUALIFIED
PERSONNEL ONLY.
Refer to the “Safety prescriptions - Installation” described on page 7.
4.8.1 Common input mains
Fig. 4.8.1-1 Common input mains
Common input mains
The UPS delivered in standard version has
common input mains.
Only one input line (F1) supplies both rectifier
and bypass input terminals.
Bear in mind that when the mains fuses are
opened there is a supply failure to the rectifier
as well as to the automatic bypass and manual
bypass.
Access to the AC terminals
1 - Open the front door “A” of the cabinet.
2 - Remove the front panel “B”
loosening the screw “F”.
3 - Remove the front panel protection cover
“C” by pulling it off.
4 - Remove the left side panels “D and E”
loosening the screws “G”.
NOTE !
For UPS correct operation,
the input mains phase
rotation must be clock-wise.
SGT4000_010-020_UPS connection_02
A
B
C
D
E
G
F
Fig. 4.8.1-2 Power IN / OUT connections
Input mains connection
L1 = Phase L1 rectifier + bypass
L2 = Phase L2 rectifier + bypass
L3 = Phase L3 rectifier + bypass
N1 = Neutral mains PE = Earth
Output load connection
L1 = Phase L1 load
L2 = Phase L2 load
L3 = Phase L3 load
N2 = Neutral load PE = Earth load
SGT4000_010-020_connection common_01GB
O
u
t
p
u
t
L
o
a
d
I
n
p
u
t
M
a
i
n
s
Fig. 4.8.1-3 Common input mains connection
NOTE !
Input/output terminals must be
tightened with a proper
screwdriver applying torsion
force 1,2 / 1,4 Nm.
Clamp the input/output cables
with the included cable-ties “A”.
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