Eaton 93PR - Energizing the Critical Load

Eaton 93PR 500 kW UPS
User's and Installation Guide 59
3. Unfasten the front door latch and swing the door open.
4. Close the UPS output switch, bypass switch, and close the front door.
5. Repeat steps 3-5 for all UPSs in the system.
6.3.8. De-energizing the Critical Load
A UPS system Load Off is initiated by the
Load Off
button
from Controls
>
System Controls
screen. This
button can be pressed to control the UPS output. The
Load Off
button de-energizes the critical load and
powers down the UPS system.
The UPS system (including Bypass) remains off until restarted.
1. Press
Load Off
.
The shut down screen appears, providing a choice to proceed or abort the shutdown.
NOTE
All power to the critical load is lost when Load Off is selected in the following step. You should use this feature
only when you want to de-energize the critical load.
2. To shut down the UPS, press
Load Off
. To abort the shutdown, press ABORT. When
Load Off
is
selected, the input, output, and bypass backfeed contactors open, the battery breaker or disconnect is
tripped, and all the UPSs in the system are turned off.
DANGER
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
3. To restart the UPS system, follow the procedure in Chapter 6.3.1 Starting the UPS system in Double
Conversion Mode or Chapter
6.3.2 Starting the UPS system in Bypass Mode.