Single Ups Operation; Starting The Ups In Double Conversion Mode; Starting The Ups In Bypass Mode - Eaton 93PM-L Installation And Operation Manual

UPS Operating Instructions
6.3

Single UPS Operation

NOTE 1
NOTE 2
6.3.1

Starting the UPS in Double Conversion Mode

To start the UPS system:
1. Close the UPS input feeder circuit breaker.
2. If dual feed, close the UPS bypass feeder circuit breaker.
3. If IBCs are installed, close the battery breakers.
4. Observe the UPS control panel display becoming active, indicating logic power.
5. Verify no alarms are active.
6. Tap the CONTROLS tab on the main menu navigation bar. The System Control screen is displayed.
7 . Tap the GO ONLINE button.
8. If requested, enter the Level 1 password. Default password is 1111.
The rectifier and inverter turn on. The inverter continues to ramp up to full voltage.
Once the inverter reaches full voltage, the UPS inverter switchgear closes and the static switch turns off.
Power is now supplied to the critical load in dual conversion mode. It takes approximately one minute for
the UPS to achieve the dual conversion mode.
The Normal status indicator is illuminated.
6.3.2

Starting the UPS in Bypass Mode

If the inverter output of the UPS is not available and the critical load needs to be energized:
In Bypass mode, the critical load is not protected from commercial power interruptions and
abnormalities.
1. Close the UPS input feeder circuit breaker.
2. If dual feed, close the UPS bypass feeder circuit breaker.
3. If IBCs are installed, close the battery breakers.
4. Observe the UPS control panel display becoming active, indicating logic power.
5. Verify no alarms are active.
6-16 Eaton 93PM-L UPS (20–120 kW, 208V) Installation and Operation Manual P-164000688—Rev 02
If an Integrated Battery Cabinet (IBC) is installed, refer to the Eaton 93PM
Integrated Battery Cabinet Installation Manual-Small Welded or the Eaton 93PM
Universal Integrated Battery Cabinet Installation Manual-Large and Large High Rate,
listed in paragraph 1.8, for IBC battery breaker location.
This unit is a four-wire device. The loss of a single input phase or the loss of neutral
with unbalanced four-wire loads will be considered a complete loss of input power
and discharge the battery to provide power to the load.
CAUTION
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