Eaton Powerware 225 kVA Three-Phase Power Distribution Unit, Installation And Operation Manual

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INTRODUCTION
EATON Powerware
®
225 kVA PDU Installation and Operation Manual
S
164201629 Rev D www.powerware.com
1−5
1.1.3 Manual Restart
If Manual Restart is enabled, the main input breaker will trip when input power to the
PDU is lost. Opening the main input breaker on power failure prevents the possibility
of a power surge when power is restored in systems with multiple PDUs and
sensitive loads. When power returns, each PDU can be restarted individually,
preventing or minimizing any power fluctuations.
See Chapter 6, PDU Operating Instructions," for additional information.
1.1.4 Emergency Power-off
An EMERGENCY POWER−OFF (EPO) pushbutton provides tripping of the main input
breaker in situations where instantaneous shutdown of the PDU output to the load is
needed.
See Chapter 6, PDU Operating Instructions," for additional information.
1.1.5 Output Transformer and Transformer Monitoring
The PDU has the following transformer and transformer monitoring features.
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Output Transformer – An output transformer provides 208 Vac output from a 480 Vac
or 600 Vac input for use with the distribution panels supplying 208/120 Vac to the
load.
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Transformer Overtemperature Monitoring – An overtemperature sensor is provided to
monitor the PDU transformer and issue a warning alarm if the temperature of the
transformer reaches 180
°
C.
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Transformer Shutdown Monitoring – A shutdown sensor is provided to shut down the
PDU if the temperature of the transformer reaches 200
°
C. This feature can be
enabled or disabled by an Eaton Customer Service Engineer.
1.1.6 Customer Interface
The PDU has the following customer interface features.
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Building Alarm Monitoring – Two inputs are available to connect to the facility’s
building alarm system, such as smoke detectors or overtemperature alarms. The
building alarms can be programmed to display the alarm functional name using the
front panel LCD. The PDU uses these inputs to monitor the building alarms in
addition to the PDU status.
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Alarm Contact – One general−purpose normally−closed or normally−open relay
contact is provided on the PDU. This contact can be connected to equipment at the
facility such as a light, an audible alarm, or a computer terminal to signal when an
alarm occurs.
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X−Slot
®
Communication – Two communication bays are standard equipment. One or
two optional X−Slot cards can be installed in the PDU at any time. See Chapter 7,
Communication," for additional information.