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Eaton 93PS UPS 8–40 kW
2.
Perform the LOAD OFF procedure (see Section
The input, output, and bypass backfeed contactors open, the battery
breaker or disconnect is tripped, and the power module is turned off.
3.
Open the UPS front door.
4.
If included in the UPS system, open the rectifier input switches.
5.
Check that the battery breaker is open.
6.
Close the UPS front door.
7.
Open the UPS input and bypass feeder circuit breakers.
8.
Repeat steps 3–7 for all the UPSs in the system.
Power is still present inside each UPS cabinet until the upstream feeder
circuit breaker is opened, and in case of a parallel system, the output is
isolated or parallel units are shut down as well.
7.3.8
Initiate a UPS system Load Off by pressing the Load Off button in the Controls >
System Controls screen. This button can be pressed to control the UPS output.
The Load Off button de-energizes the critical load and shuts down the UPS
system. The UPS system (including bypass) remains off until it is restarted.
1.
Press Load Off.
The shutdown screen appears, providing a choice to proceed or abort the
shutdown.
2.
To shut down the UPS, press Load Off. To abort the shutdown, press
Abort.
Note: All power to the critical load is lost when Load Off is selected. Only
use this feature when you want to de-energize the critical load.
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.
To restart the UPS system, follow the procedure in Section
7.3.2
.
Do not attempt to restart the system after Load Off until you have identified
and cleared the cause of the shutdown.
©
Eaton Corporation plc 2016. All rights reserved.
De-energizing the critical load
DANGER
CAUTION
Revision: 003
Document ID: P-164000493
User's and installation guide
7.3.8
).
7.3.1
or Section
84 (104)
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