C750 & C750R User
Manual Page 36
4. PARALLEL SYSTEM INSTALLATION AND OPERATION (OPTIONAL)
If your UPS is configured with parallel function, up to 3 UPSs can be connected in parallel to configure a sharing and
redundant output power.
In parallel system, the mechanical installation for each module is the same as a single system. For details please refer
to
Chapter 3.3.
Parallel system AC cable diagram:
4.1 WIRING FOR AC/DC CABLE
1.
Wiring length requirement:
When the distance between the load and the parallel UPS is less than 10 meters, the length difference
between the input/output lines between the UPSs in the parallel system is less than 20%.
When the distance between the load and the parallel UPS is greater than 20 meters, the length difference
between the input/output lines between the UPSs in the parallel system is less than 5%.
2.
Professional installation is required.
This chapter introduces how to wire AC IN/OUT cable to UPS in parallel system, and UPS connecting with
EBM/MBP.
4.1.1 Input/Output wiring specifications
Cable select table for the parallel system AC IN, AC OUT and Battery wire:
Parallel system installed by 10kVA UPS (conductor cross-section, unit: mm
²
)
UPS
number
Mode
Main input
Bypass input
Gr
o
u
n
d
w
ire
Output
Ba
tte
ry
w
ire
Ba
tte
ry
gr
ou
n
d
L
w
ire
N
w
ire
L
w
ire
N
w
ire
L
w
ire
N
w
ire
Gr
o
u
n
d
2 UPS
3-3
10
10
6
6
10
6
6
6
35
35
3-1
10
10
25
25
25
25
25
25
35
35
1-1
50
50
25
25
50
25
25
25
35
35
3 UPS
3-3
16
16
10
10
16
10
10
10
70
70
3-1
16
16
50
50
50
50
50
50
70
70
1-1
95
95
50
50
95
50
50
50
70
70
