14 Rockwell Automation Publication 825-UM004D-EN-P - November 2012
Chapter 1 Introduction
Optional Protection Features
Voltage-Based Protection
• Undervoltage
• Overvoltage
• Underpower
• Reactive Overpower
• Phase Reversal
• Power Factor
RTD-Based Protection
Up to 12 RTDs can be monitored when an external 825-PR12D RTD Scanner is
used. There are separate trip and warn settings for each RTD.
Monitoring Features
The monitoring features of the 825-P are as follows:
• Event summaries contain relay ID, date and time, trip cause, and current/
vo
ltage magnitudes.
• Serialized Events Recording (SER).
• Motor running time since the last reset.
• Start cycles since the last reset.
• Emergency start cycles since the last reset.
• A complete suite of accurate metering functions.
Options and Accessories
Options
• The 825-P has the following options:
– Voltage Option: four-wire wye or open-delta connected potential
tra
nsformers
– Input/Output (I/O) Option: one 4…20 mA analog (transducer)
ou
tput, three additional control inputs, and four additional contact
outputs
– Network communications options
• DeviceNet
• Modbus
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