Emerson 400V Manuel D’Utilisation

Output System Connections
6. Connect the system output cables between the UPS output (U2-V2-W2-N terminals) and the 

critical load and tighten the connections to 5Nm for M6 bolts, to 13Nm for M8 bolts or to 26Nm for 

M10 bolts. Ensure correct phase rotation.

External UPS Battery Connection (60kVA Models and Above, Option for 30-40kVA Models) 
Connect the battery cables between the UPS terminals (+\-) and its associated battery circuit 

breaker. Observe the battery cable polarity.

Internal UPS Battery Connection (30/40kVA only)
7. The battery consists of a series string connection of 5 x 8 (or 10) x 12V 6-cell battery blocks.

a. Ensure that the eight (or 10) battery blocks in each tier (tray) are interconnected.
b. Connect the positive and negative cables to the UPS terminals.
c. Plug in the cables between the tiers.
d. Ensure correct polarity battery string series connections (i.e., intertier and 

interblock connections are from positive to negative terminals.

8. Refit all protective covers removed for cable installation.

NOTE
When connecting the cables between the battery extremities to the circuit breaker always 

If the load equipment will not be ready to accept power on the arrival of the commissioning 

engineer, ensure that the system output cables are safely isolated at their ends.

Hazardous Battery Terminal Voltage 480VDC
Ensure correct polarity of string end connections to the UPS terminals, i.e., positive to 

positive and negative to negative, but leave these UPS terminal cables disconnected until 

connection is authorised by the commissioning engineer.
Ensure correct polarity of string end connections to the battery circuit breaker and from the 

battery circuit breaker to the UPS terminals, i.e., positive to positive and negative to negative, 

but disconnect one or more battery cell links in each tier.
Do not reconnect these links and do not close the battery circuit breaker before authorised by 

the commissioning engineer.