Tripp Lite SUTX20K Owner's Manual page 22

3. Installation and Wiring
Non-Tripp Lite External Battery Cabinet Connection
A non-Tripp Lite external battery cabinet should include 40 batteries connected in string. Connect the cabinet's neutral to the middle
20th and 21st batteries. Use three cables to connect a non-Tripp Lite external battery cabinet with the '+', '-' and 'N' terminals marked
on the UPS.
When connecting a non-Tripp Lite external battery cabinet with the UPS, an appropriate 4-pole non-fuse DC breaker and fast-acting fuses
must be installed. Do not use an AC breaker. The closer the breaker and the fuses are to the batteries, the better. Refer to the figure
below.
• The parallel UPS systems can connect with common batteries.
WARNING:
A battery can present a risk of electric shock and high short-circuit current. Servicing of batteries and battery
cabinets must be performed or supervised by qualified service personnel knowledgeable in batteries, battery
cabinets and the required precautions. Keep unauthorized personnel away from batteries and battery cabinets.
External Battery Cabinet Alarm
When an external battery cabinet connected to the UPS has the following problems, the UPS system will sound one of the following
alarms:
No. External Battery Cabinet Status
1 Battery Test Fail
2 Battery Low Warning
3 Battery Low Shutdown
4 Battery Over Charge
5 Battery Missing
External Battery Cabinet
External Battery Cabinet
External
Battery
Cabinet
+ - + -
1 2
(Figure 3-19: Non-Tripp Lite External Battery Cabinet Connection)
(N)
+
( )
External Battery Cabinet
Fast-acting
Fuses
4-pole Non-fuse
DC Breaker
+ - + - + -
20 21 22
Alarm
Sounds once every 2 seconds.
Sounds once every 0.5 second.
Long beep (5 seconds)
Sounds once every 2 seconds.
Sounds once every 2 seconds.
22
-
( )
+ -
40