Ups Control Instructions; Starting A Single Ups; Ups Shutdown - Eaton 93PR Installation And Operation Manual

6.4. UPS Control Instructions

6.4.1.

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. (If the UPS contains) Verify that rectifier input switch, output switch, bypass switch are closed
the UPS system, 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.
6. Press the Controls button in the main menu. Press the UPS controls button.
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, 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.
9. Press the Go online button on the UPS control screen.
10. Observe the following messages appear sequentially on the UPS status line:
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.
6.4.2.

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.
3. On the UPS control screen, select Shut down UPS.
110
STARTING
ONLINE
Copyright © 2021 Eaton Corporation plc. All rights reserved.