3 Installation
MY-A Series (10kVA-20kVA) UPS
User Manual
42
15kVA/20kVA
M
a
in
s
in
p
u
t A
M
a
in
s
in
p
u
t B
M
a
in
s
in
p
u
t C
M
a
in
s
in
p
u
t N
B
a
tte
ry
-
B
a
tte
ry
+
B
a
tte
ry
N
B
y
p
a
s
s
N
B
y
p
a
s
s
A
B
y
p
a
s
s
B
B
y
p
a
s
s
C
O
u
tp
u
t A
O
u
tp
u
t B
O
u
tp
u
t C
O
u
tp
u
t N
UPS 1
UPS 2
B
a
tte
ry
-
B
a
tte
ry
N
B
a
tte
ry
+
B
a
tte
ry
-
B
a
tte
ry
+
B
a
tte
ry
N
B
a
tte
ry
-
B
a
tte
ry
N
B
a
tte
ry
+
G
ro
u
n
d
in
g
INPUT
BYPASS
OUTPUT
A
B
C
N
A
B
C
N
A
B
C
N
INPUT
BYPASS
OUTPUT
A
B
C
N
A
B
C
N
A
B
C
N
+
-
EXTERNAL
BATTERY
CABINET 1
N
+
-
EXTERNAL
BATTERY
CABINET 2
N
+
-
EXTERNAL
BATTERY
CABINET 1
N
+
-
EXTERNAL
BATTERY
CABINET 2
N
DC breaker 1 DC breaker 2
DC breaker 3
DC breaker 4
Figure3-24
Parallel system wiring diagram of 15kVA/20kVA
Step 3
Connect the parallel port of each UPS in parallel by parallel wires, as shown in Figure3-25 and
Figure3-25
Double parallel wiring diagram
Figure3-26
Four parallel wiring diagram
1.
The wiring operation of parallel system of this series is the same.
2.
When the battery pack is shared by UPS in the parallel system, please make sure that all battery
parameters of each UPS are consistent, such as battery capacity, battery number, charging
voltage and charging current.
