Emerson 400V Manuel D’Utilisation

7. Press the EPO (Emergency Power Off) button at the UPS front panel of this UPS module only. 

This will disable further Rectifier, Inverter, Static Switch and Battery operation. This will not 

affect the manual maintenance bypass power switch.

8. Open the Rectifier input power switch Q1 and Static bypass input power switch Q2
9. When an external battery is connected, open external battery circuit breaker. This breaker is 

located inside the battery cabinet (if used) or is otherwise adjacent to the battery racks

All mimic panel LED indications and messages will extinguish as the mains driven internal 

power supplies decay. 

NOTE
Do not press any remote EPO button.

Hazardous Voltage at UPS terminals 
No operator-serviceable parts are located behind covers that require a tool for their removal.
Only qualified service personnel are authorised to remove such covers.
The input and output AC and DC battery and connecting terminals remains energized at 

hazardous voltage levels at all times. The battery is located behind protective covers that 

require a tool for their removal. inside the UPS cabinet (30 and 40kVA models), inside a free-

standing battery cabinet or on open racks inside a dedicated battery room that may be locked.

Q1

UPS

Supplied 

by Others

CB

U5/V5/W5/N5

U3/V3/W3/N3

U1/V1/W1/N1

U4/V4/W4/N4

U2/V2/W2/N2

U6/V6/W6/N6

Q3

Q5

Q2

QF2

QF4

QF3