Tescom DS340H - Page 49

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CAUTION !!! You must never set the operation modes of parallel connected UPS units to
“ONLINE”, otherwise serious damage may occur in UPSs.
Note: As seen in the figure, the outputs of parallel UPS units should be connected to each other
using an AC distribution board.
Figure 4.3
DS300H Series Parallel UPS Power Connections
BATTERIES
U
V
W
N
LOAD
FUSES
AC
BYPASS AC INPUT
MAIN AC INPUT
AC DISTRIBUTION
U
1
V
1
W1
N1
U
2
V
2
W2
N2
+
-
+
-
UPS1
K3
K2
K2
K4
K5 K6 K7
K8 K9
K10
K11
K12
K13
K14
K1
U
V
W
N
AC OUTPUT1
+
-
+
-
BATTERIES
UPS2
K3
K2
K2
K4
K5 K6 K7
K8 K9
K10
K11
K12
K13
K14
K1
U
V
W
N
AC OUTPUT2
FUSES
+
-
+
-
BATTERIES
UPS3
K3
K2
K2
K4
K5 K6 K7
K8 K9
K10
K11
K12
K13
K14
K1
U
V
W
N
AC OUTPUT3
FUSES
LOAD BRAKE
SWITCH