Operation
3.3.6Emergency Module Off
The Local Emergency Module Off (LEMO) mode is used to remove power from nearly all UPS module components, and the critical load will continue to be supplied through the bypass line.
The Emergency Module Off control is a guarded pad on the UPS Control Panel (Figure 4).
Lift the cover and press the pad. The load will be transferred to bypass, and the battery (MBD), input and output circuit breakers will be opened (tripped). This will remove power from all UPS module components except the controls, bypass circuit breaker and the static switch.
Refer to 3.4.4 - Shutdown Procedures.
Figure 47 Emergency modules off
THREE BREAKER MAINTENANCE BYPASS SWITCHBOARD
BFB | MBB |
| Critical |
| Load |
| AC Output |
BIB | MIB |
RIB
UPS MODULE
Static
Bypass
Switch
Static |
|
Switch | Bypass CB |
Disconnects |
CONTROL POWER
Controls |
MAIN INPUT SWITCHGEAR
INPUT
CB
Rectifier/ |
Charger |
Inverter
OUTPUT
CB
Battery
MBD
64
