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Eaton 93E Generation 2 UPS 100-200 kVA
(380/400/415V)
13. If requested, enter the Level 1 password. The default password is 1111.
Once all inverters reach full voltage, the UPS output contactor closes. The
unit will not go to the bypass mode, because otherwise the pull chain will
turn the whole system to the bypass mode. Power is now supplied to the
critical load in the double conversion (normal) mode along with the other
UPSs online. It takes approximately one minute for the UPS to achieve the
double conversion (normal) mode.
The green normal status indicator is illuminated.
7.4.7
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
The output and bypass backfeed contactors open, and the inverters are
turned off.
3.
Perform the battery charger off procedure, see Section
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.
4.
Open all of the UPS input swithes.
5.
If the UPSs contain bypass input switches (BIS), open the BISs.
6.
If the UPSs contain an output switch, open the output switch.
7.
Open all of the MOBs.
8.
Open the UPS input and bypass feeder circuit breakers.
9.
Open all external battery breakers.
7.4.8
A UPS Load Off is initiated when the Load Off command is selected in the UPS
Control screen. The UPS LOAD OFF controls the UPS output by powering down
the UPS and de-energizing the critical load.
The UPS (including bypass) remains off until restarted.
To use the LOAD OFF command:
1.
Select the CONTROLS symbol in the main menu bar on the UPS to be
shut down.
The System Control screen is displayed.
2.
Select UPS in the System Control screen.
©
Eaton Corporation plc 2019. All rights reserved.
Shutting down the UPS system and critical load
Using the UPS LOAD OFF command
WARNING
Revision: 002
Document ID: P-164000848
User's and installation guide
7.4.8
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7.3.10
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