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33
3. Installation and Wiring
3.15 External Battery Connections
The UPS has positive and negative double battery framework, with a total of 20 batteries in series. A neutral cable is
retrieved from the joint between the cathode of the tenth battery and the anode of the tenth battery. Then the neutral
cable, the battery positive and the battery negative, respectively, are connected with the UPS. The battery sets between
the battery anode and the neutral are called positive batteries, and those between neutral and cathode are called
negative batteries. Refer to section 3.9.1 UPS and Battery Cabinet Compatibility.
Notes:
• The BAT+ of the UPS connect poles is connected to the anode of the positive battery.
• The BAT-N is connected to the cathode of the positive battery and the anode of the negative battery.
• The BAT- is connected to the cathode of the negative battery.
• The default settings of the long-run unit are for 20 batteries. When connecting batteries (in multiples of 20), set the correct battery
quantity and capacity after the UPS starts in AC mode. Charger current adjusts automatically according to battery capacity selected. All
related settings can be done through the LCD panel or monitoring software.
CAUTION!
Ensure correct polarity battery string series connection, i.e. inter-tier and inter-block connections
are from (+) to (-) terminals.
Donotmixbatterieswithdierentcapacityorofdierentbrands.Donotmixnewandoldbatteries.
WARNING!
Ensure correct polarity of string end connections to the battery circuit breaker and from the battery
circuit breaker to the UPS terminals, i.e. (+) to (+) / (-) to (-), but disconnect one or more battery cell
links in each tier. Do not reconnect these links and do not close the battery circuit breaker unless
authorized by the commissioning technician.
Positive Battery
10 Batteries
+120Vdc
N
±120Vdc
(240Vdc)
Negative Battery
10 Batteries
-120Vdc
BAT+ BATN BAT-
Battery Breaker
BAT+
BAT-
BATN
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