Modulon NH Plus Series
4-9
External Battery Pack Connection:
40 series connected batteries in each string battery pack of UPS. The neutral
wire is connected at the point between No.20 and No.21 battery. Totally three
wires are connected to the UPS terminal: positive, negative and neutral wires.
When connecting a non-Delta external battery cabinet with the UPS, you must
install a non-fuse 3-pole DC breaker and fuses first. Do not use an AC breaker.
Please follow the actual discharge current to decide the breaker’s current
capacity. A 500Vdc breaker and 500Vdc fuses are suggested. The closer the
breaker and the fuses are to the batteries, the better. Refer to the following
connection diagram for detailed information.
BAT+
BAT-
BAT-N