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Chapter 12 Helpful information
The UPS keeps transferring on line to on battery power
Using non-linear loads with a smaller generator will result in the output waveform of the
generator to be very distorted. This distortion will most likely result in the UPS product
frequently transferring back and forth from On-Line to On-Battery.
See
Step 2 Increase the generator size
additional information.
EPO / RPO / ROO
An Emergency Power Off,
going off. The UPS designs do not disconnect the DC (Battery) by physical (breaker or
contactor). This means that Emergency Power Off does not exist with these UPS units. Instead
a Remote Power off,
The Remote On/Off,
or closing the contact points on the back of the UPS.
When an RPO is activated (opening the contact points), once it is deactivated, the user must
clear the EPO alert, shown on the UPS LCD panel as
load will be available to start. Once the EPO alert has been cleared the UPS is in standby and
needs to be powered up via the UPS power on button X. The ROO does not require this reset
action.
All UPS units are equipped with an RPO and an ROO connector:
Example – attaching a PDU to a UPS unit
Note: Only single phase PDUs can be attached to the UPS.
The output from the hardwire connection is limited by the input current limits of the system;
however a PDU can be connected through the hardwired connection.
The output of the hardwire connection is the output path which can be online double
conversion or set to the bypass through the menu control function.
6U Rack or Tower UPS RT8kVA and RT11kVA IUOMG
, requires that the DC connection be opened as well as the load
EPO
, is available.
RPO
, is different in that it can turn the load output on and off by opening
ROO
in the
Considerations section
Emergency
of this chapter for
OFF, from the LCD before the
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