Eaton Power Xpert 9395P 250 kVA, User And Installation Manual

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143 9395P 250 kVA / 275 kVA / 300 kVA
User’s and Installation Guide
7.6.25 UPS and Critical Load Shutdown
To perform maintenance or service on the critical load, shut down power to the load:
1.
Turn off all equipment that is being powered by the distributed bypass system.
2.
Transfer the UPSs to bypass by performing the procedure in paragraph 7. 6 .17.
3.
Perform the LOAD OFF procedure in paragraph 7. 6 .27.
The input, output, battery, and bypass backfeed contactors open, and the power module is turned off.
4.
If the UPSs contain input breakers (CB1), open all UPS input breakers.
5. Open the input and bypass feeder circuit breakers on all UPSs .
7.6.26 Charger Control
To turn the battery charger on:
1.
Press the
CONTROLS
pushbutton on the main menu bar. The System Status screen is displayed.
2.
On the System Status screen, select the
CHARGER
command.
3. Press the
CONTROLS
pushbutton on the System Status menu bar. The Charger Control Command
screen is displayed.
4.
On the Charger Control Command screen, select
CHARGER ON
.
5. Press the
SELECT
pushbutton on the Charger Command menu bar.
To turn the battery charger off:
1. Press the
CONTROLS
pushbutton on the main menu bar. The System Status screen is displayed.
2.
On the System Status screen, select the
CHARGER
command.
3.
Press the
CONTROLS
pushbutton on the System Status menu bar. The Charger Control Command
screen is displayed.
4.
On the Charger Control Command screen, select
CHARGER OFF
.
5. Press the
SELECT
pushbutton on the Charger Command menu bar.
WARNING
Power is present inside the UPS cabinet until the upstream input feeder circuit breaker is opened.
7.6.27 Using the UPS LOAD OFF Pushbutton or Command
A UPS Load Off is initiated by the
LOAD OFF
pushbutton from the main menu bar, the Load Off command on
the UPS Control Command screen, or Load Off command on the Bypass Control Command screen. The UPS
LOAD OFF
controls the UPSs outputs by powering down the UPS and de
‐
energizing the critical load.
The UPSs (including Bypass) remain off until restarted.
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 7.6.28).