Using The Ups Load Off Command - Eaton Power Xpert 9395 Installation And Operation Manual

7.5.12 Using the UPS LOAD OFF Command

A UPS Load Off is initiated by either a command or a pushbutton. It controls the UPSs' outputs by powering
down the UPS and de-energizing the critical load. The UPSs (including Bypass) remain off until restarted.
This procedure initiates a UPS Load Off using the LOAD OFF command.
NOTE The UPS LOAD OFF controls each UPS independently and does not shut down the
whole distributed bypass system unless all UPSs have been transferred to bypass.
To immediately shut down the whole system, use the REPO switch (see paragraph
7.5.13).
All power to the critical load is lost when a LOAD OFF command is issued in the following step.
You should use this feature only when you want to de-energize the critical load.
To use the LOAD OFF command:
1. Press the CONTROLS pushbutton on the main menu bar of the UPS to be shut down. The System Status
screen is displayed.
2. On the System Status screen, select either the UPS or the BYPASS command.
3. Press the CONTROLS pushbutton on the System Status menu bar. The UPS or Bypass Control Command
screen is displayed.
4. On the Control Command screen, select LOAD OFF .
5. Press the SELECT pushbutton on the Command menu bar.
The Load Off screen is displayed, providing a choice to proceed or abort the shutdown.
6. To shut down the UPS, press LOAD OFF from the Load Off menu bar, and hold for three seconds. To abort
the shutdown, press CANCEL.
When LOAD OFF is selected and held for three seconds, the input, output, battery, and bypass backfeed
contactors open, and the power module is turned off on the UPS.
7 . If another UPS is to be shut down, proceed to that UPS and repeat Steps 1 through 6.
Do not attempt to restart the system after the Load Off until the cause of the shutdown has been
identified and cleared.
8. Restart the UPS by following the procedure in paragraph 7.5.1 or 7.5.2.
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
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Eaton Power Xpert 9395P-300 (300kVA, 300kW) UPS Installation and Operation Manual
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UPS Operating Instructions
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