Eaton 93PM - System Control Instructions; Starting the UPS System in the Double Conversion Mode

7.3 System control instructions
7.3.1 Starting the UPS system in the double conversion mode
The UPS system can consist of a single UPS or several parallel UPSs. UPSs
with their MOB open are not considered as part of the system.
To start the UPS system:
1. Open the UPS front door.
2. If included inside the UPS system, check that the rectifier input switches
are closed.
3. Check that the battery breaker is closed.
4. Close the UPS front door.
5. Close the UPS input feeder circuit breaker.
6. Close the UPS bypass input feeder circuit breaker.
7. Wait for the UPS control panel display to become active and to indicate
logic power.
8. Repeat steps 1-7 for each individual UPS in the system.
9. In the home screen, press Controls.
The System controls screen appears.
10. In the System controls screen, make sure that the system status is
SHUTDOWN.
11. In the System controls screen, press the Go online button.
If Auto Bypass is enabled (factory default), the critical load is immediately
supplied by the bypass source, in the bypass mode, until the inverter turns
on and the UPS transfers to the double conversion mode. The status
indicator on the UPS control panel indicates that the UPS is in the bypass
mode. If auto bypass is not enabled, the UPS output remains off until the
UPS system transfers to double conversion mode.
12. Wait for these messages to appear sequentially on the System controls
screen:
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 and the static switch turns off.
Power is now supplied to the critical load in the double conversion mode. It
takes approximately 20 seconds for the UPS system to achieve the double
conversion mode.
The UPS system is now operating in the double conversion mode. The green
status indicator for normal operation is illuminated in all the UPSs in the system.
Eaton 93PM UPS 30–200 kVA
User's and installation guide
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Eaton Corporation plc 2017. All rights reserved. Revision: 005 Document ID: P-164000249 96 (126)