IV404E Rev.000 SIEL S.p.A.
Issue date: 2017-06-05 Pag. 58 di 90 + FR
S
W
O
U
T
e
xt
aux
OUT (C)
MAINS (M)
a2
c3
IN (B)
IN (B)
OUT (C)
a1
a3
UPS 2
c1
UPS 3
IN (B)
UPS 1
(D)
OUT (C)
c2
(A)
ext
SWO UT
ext
SWO UT
(A)
(A)
(A)
4.3
Mains, load and battery connections.
All the information contained in the section “Mains, load and battery connections” (page
25) in relation to
the UPS remains valid with the addition of the information set out below.
4.3.1 UPS AC input / output power connection
Refer to the INSTALLATION DRAWINGS manual for information on how to select the cable sections for
each UPS
.
Observe the phase connections
Phase L1 of the system must be connected to input phase L1 on all the UPSs; all the output
phases L1 must be connected together and with phase L1 of the load. The connections must be
observed for phases L2, L3 and for the input and output neutral.
parallel connect the SAFEPOWER EVO HFTs as follows:
- Connect the power supply phases L1,L2,L3,N to the
corresponding
input phases of each UPS L1,L2,L3,N.
- Connect the load phases L1,L2,L3,N to the
corresponding
output phases of each UPS L1,L2,L3,N.
The figure shows an example of three units connected in
parallel.
Power supply line (M)
SAFEPOWER EVO HFT input terminal boards (B)
SAFEPOWER EVO HFT output terminal boards
(C)
Load (D)
Aux SWOUT ex (A)
a1,a2,a3,c1,c2,c3) length of cables
