Modulon NH Plus Series
4-5
4-5 Wiring
4-5-1 Preparations
1. De-energize all input (AC or DC) or output power of the UPS before installing cables
or making any electrical connection.
2. Ensure that all cables are correctly marked according to the purpose, as well as the
polarity, phase and diameter.
3. If the input/output power of the UPS is WYE-WYE (Y connection),
”Neutral”
and
”Ground”
should not be connected.
If the input power has V
NG
>0, and client requested the V
NG
must be 0 volt inside the
UPS , the solution is to install an isolation transformer before UPS and input power
source. Then, connect “
Neutral
” and “
Ground
” of the UPS together.
4. Make use of suitable conduits and gland to protect I/O wiring according to local
regulations. Refer to Table 4-3.
Table 4-3 Input/Output Electrical Data
* Follow the statute according to the installation region and select a suitable breaker
and cable.
* It is compulsory to install an appropriate three-pole non-fuse DC breaker and fuses
for a non-Delta external battery cabinet.
5. Confirm the power phase of R, S and T.
6. Confirm the polarity of battery cable.
7. Connect the ground of external battery cabinet to UPS’s ground.
8. Connect the UPS’s ground to the protective earth.
UPS
module
Quantity
Input
(V)
Output
(V)
Input
Breaker
(A)
Cable
(mm
²
)
Bypass
Breaker
(A)
Bypass
Cable
(mm
²
)
Output
Breaker
(A)
Output
Cable
(mm
²
)
Battery
Cable
(mm
²
)
Battery
Fuse
(A)
1 220/380
220/380
50 10 50
10
50
10 10 60
2
220/380
220/380
75 16 75 16 75 16 16
120
3 220/380
220/380
125 35 125 35 125 35 35 160
4 220/380
220/380
150 25*2 150 25*2 150 25*2 25*2 220
5 220/380
220/380
200 35*2 200 35*2 200 35*2 35*2 260
6 220/380
220/380
250 35*3 250
35*3
250
35*3 35*3 300
Wrong cabling will result in severe accidents or damages of the UPS.
