Chapter 7—Monitoring and Diagnostics
142 Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com
Table 55. Power-Based Monitoring
Parameter Name Range/Units Description
Watts Total Depends on frame size (watts) Total real power. 5% accuracy.
VA Total Depends on frame size (Volt-Amps) Total apparent power. 5% accuracy.
VARS Total Depends on frame size (Vars) Total reactive power. 5% accuracy.
Power factor 0–100%, Scaled by 0.01% via fieldbus Apparent power factor in percentage. 1% accuracy.
Speed RPM Depends on motor (0.1 RPM) Motor speed in RPM
Torque Depends on motor (0.01 Nm) Motor torque
Efficiency percent PC tool in %, scaled by 0.01% via fieldbus Motor efficiency in percentage
Real energy Depends on frame size (0.1 kWh) Real energy scaled. 5% accuracy.
Real energy (resettable) Depends on frame size (0.1 kWh) Real energy (resettable) scaled. 5% accuracy.
Apparent energy Depends on frame size (0.1 kVAh) Apparent energy scaled. 5% accuracy.
Apparent energy (resettable) Depends on frame size (0.1 kVAh) Apparent energy (resettable) scaled. 5% accuracy.
Reactive energy Depends on frame size (0.1 kVARh) Reactive energy scaled. 5% accuracy.
Reactive energy (resettable) Depends on frame size (0.1 kVARh) Reactive energy (resettable) scaled. 5% accuracy.
Current demand value Depends on frame size (watts) Latest estimate of the demand. 5% accuracy.
Demand (resettable) Depends on frame size (watts) Peak demand, user resettable. 5% accuracy
Peak demand time stamp Time in seconds Peak demand time stamp (in Unix time)
Demand window duration Time in minutes Demand window duration
Table 56. System Monitoring
Parameter Name Range/Units Description
Motor state (current based) 0: stopped;
1: accelerating;
2: running
Current based motor state (independent of command)
Motor control status See table below Present motor control status bits
Number of operating seconds Time in seconds Number of operating seconds
Operating seconds (resettable) Time in seconds Number of operating seconds (resettable)
Time to trip overload Time in seconds Time for overload to reach trip threshold (100%)
Time to reset overload Time in seconds Time for overload to reach reset threshold (thermal memory must drop below 75%)
PTC status See table below PTC status
Digital input status 0/1 ON/OFF status of digital inputs.
Base Control Module relay status 0/1 Base Control Module relay status (output status)
Total motor run time Time in seconds Total motor run time in seconds
Total motor run time (resettable) Time in seconds Total run time user (resettable)
Last measured starting time Time in seconds The amount of time the motor took to reach up to speed on the last start.
Number of starts Number Total number of motor starts
Number of starts (resettable) Number Number of starts (resettable)
Number of contactor operations
last hour
Number Number of contactor operations during the last hour
Latest run time Time in seconds Duration in seconds of the last start-to-stop motor run time
Thermal capacity 0–250% Thermal capacity in percent—overload trip occurs at 100%.
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