Ups Control Instructions; Starting A Single Ups; Ups Shutdown - Eaton 93PM User And Installation Manual

3.
To restart the UPS system, follow the procedure in Chapter 6.4.1 Starting the UPS system in
Double conversion mode on page 63 or Chapter 6.4.2 Starting the UPS system in Bypass
mode on page 64.

6.5 UPS control instructions

6.5.1 Starting a single UPS

Ensure that load level does not exceed single UPS capacity.
To start the UPS
1. Unfasten the front door latch and swing the door open.
2. Verify that rectifier input switches are closed if included inside the UPS system, and verify that
battery breaker is closed, and close the front door.
3. Close the UPS input feeder circuit breaker.
4. Close the UPS bypass input feeder circuit breaker.
5. Observe the UPS control panel display becoming active, indicating logic power.
Press the Controls button in the main menu. Press the UPS controls button.
6.
7. On the UPS Controls screen, the system status should indicate SHUTDOWN.
8. Press the Go online button on the System Controls screen. If Auto Bypass is enabled (factory
default), the critical load is immediately supplied by the bypass source, in Bypass mode, until
the inverter turns on and the UPS transfers to double conversion mode. The status indicator on
the UPS control panel indicates the UPS is in Bypass mode. If auto bypass is not enabled, the
UPS output remains off until the UPS system transfers to double conversion mode.
Press the Go online button on the UPS control screen.
9.
10. Observe the following messages appear sequentially on the UPS status line:
STARTING
ONLINE
The rectifier and inverter turn on. The DC voltage continues to ramp up to full voltage. Once the
DC link reaches full voltage, and the battery breaker is closed, the UPS output relay K3 closes.
Power is now supplied to the Critical load in double conversion mode. It takes approximately 20
seconds for the UPS system to achieve double conversion mode.
11. The UPS system is now operating in double conversion mode and the NORMAL status
indicator is illuminated.

6.5.2 UPS shutdown

A single UPS in the system can be shut down only if it is redundant. In practice that means a UPS is
not allowed to be shut down if doing so would lead to an overload condition in the remaining UPSs
in the system.
To shut down a single UPS:
1. Press the Controls button in the main menu. The System controls screen is displayed.
2. On the System controls screen, press UPS controls.
On the UPS control screen, select Shut down UPS.
3.
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Revision 2
30-200 kW
User's and Installation Guide
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