To transfer the critical load to the double conversion mode:
1. In the home screen, press Controls.
2. Select Service controls.
3. Select Disable ESS.
The UPS system transfers to the battery mode and then to the double
conversion mode. If the power module is not available, the system remains
in the bypass mode and an alarm sounds. The green status indicator for
normal operation is illuminated. The UPS status is shown as UNIT
ONLINE. The UPM status is shown as ACTIVE.
7.3.7 Shutting down the UPS system and critical load
To perform maintenance or service on the critical load, shut down the power to
the load by performing the following procedure:
1. Turn off all the equipment that is powered by the UPS system.
2. Perform the LOAD OFF procedure (see Section
7.3.8
).
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.
DANGER
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 De-energizing the critical load
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.
Eaton 93PM UPS 30–200 kVA
User's and installation guide
©
Eaton Corporation plc 2017. All rights reserved. Revision: 005 Document ID: P-164000249 99 (126)
To Next Page
Loading...
