4-6 Wiring
4-6-1 Preparations:
1. De-energize all input (AC or DC) or output power source of UPS before installing cables
or making any electrical connections.
2. Make sure that all cables are correctly marked according to the purpose. Also the
polarity, phase and diameter.
3. If UPS input/output power source is WYE-WYE (Y connection), then
”Neutral”
and
”Ground”
should not be connected!
If input power source has V
NG
>0, the solution is install an isolation transformer before
UPS and input power source. Then connect “Neutral” and “Ground” of UPS together.
4-6-2 Wiring (Single Unit)
Notice:
Confirm the Ph-R
、
S
、
T of each cable.
Confirm the polarity of battery cable.
a. Connect battery’s
「
+
」
、
「
-
」
and
「
N
」
to UPS’s related terminal.
b. Connect ground of external battery cabinet to UPS’s ground.
Confirm the connection of UPS’s ground to protective earth.
Wrong cabling will result in severe damage of UPS and accident.
4-5
