14
UDD-SD-112/
Release Date: 25.12.2014/Rev No: 1 /Rev.
Date
: 18.05.2015
Wiring diagram for two UPS parallel system
Wiring diagram for thee UPS parallel system
④ If the UPS is the standard type, each UPS has batteries inside already. If the UPS is the long-
run type, each UPS should be equipped a individual battery pack.
⑤ After installation, check all the wiring carefully, be sure to con irm correct, then can operate
the system.
3.3.2 Parallel System Operation and Maintenance
General operation of parallel system, please refer to the operation instruction of single UPS.
Before starting the system, need to set up different ID for each UPS, specific settings please refer
to the instruction of ID setting which is given in single UPS panel function setting.
＞
Turn on the parallel system
Start the system with mains power: After inputting the mains power
，
turn on any one UPS of
system, others will start by themself at same time. All UPS will enter into Line mode.
Start the system without mains power: Make sure the battery pack is connected well and the
breaker is in “ON” position. There are two ways to start the UPS parallel system without utility
power supply:
A: Press the key
on each UPS, make each LCD of each UPS light up, then turn on any one
UPS of system, others will start by themself at same time. All UPS will enter into BAT mode.
B: Turn on UPS one by one.
INPUT
BAT1
BAT2
OUTPUT
R
S
T
N L
N
BAT+ BAT-
R
S
T
N L
N
BAT+ BAT-
INPUT
BAT1
BAT2
R
S
T
N L
N
BAT+ BAT-
R
S
T
N L
N
BAT+ BAT-
BAT3
OUTPUT
R
S
T
N L
N
BAT+ BAT-
