C750 & C750R User
Manual Page 25
Recommended cable minimum cross-sectional area (unit: mm
²
)
Note:
1. Please select the larger cross-section conductor for the UPS input cable in the single source application.
2. UPS output cable length is recommended not to exceed 10m.
3. In the three-phase output mode, if the load is an unbalanced load, the L wire of the bypass and output may
exceed the rated current, and the maximum rated current will be 1.732 times. The corresponding protection
device and wiring cable must be determined according to the standards of the region and the actual situation
of the user.
3.4.2 Wiring for AC cable (AC source to UPS)
UPS power
rating
Input/
Output
Mode
Input
Output
Battery
Main input
Bypass input
Gr
o
u
n
d
w
ire
L
w
ire
N
w
ire
L
w
ire
N
w
ire
L
w
ire
N
w
ire
Gr
o
u
n
d
w
ire
+/
N
/-
wi
re
Gr
o
u
n
d
w
ire
10kVA
3-3
4
4
4
4
10
4
4
4
10
10
3-1
4
4
10
10
10
10
10
10
10
10
1-1
16
16
10
10
16
10
10
10
10
10
20kVA
3-3
10
10
10
10
10
10
10
10
10
10
3-1
10
10
25
25
25
25
25
25
10
10
1-1
50
50
25
25
50
25
25
25
10
10
leakage current:
Earth connection essential before connecting
supply.
This type of connection must be carried out by
qualified electrical personnel.
Before carrying out any connection, check that the
upstream protection devices (Normal AC source and
Bypass AC source) are open ‘O’ (Off).
