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CHAPTER 8: MAINTENANCE
Motor Health Report
NOTE:
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
The motor health reporting function is included with every 869 relay, providing critical
information on the historical operating characteristics of the motor during motor starting
and stopping operations during a programmable time period. The report can be generated
as a PDF file using the EnerVista 8 Series Setup software. The health report includes seven
categories:
•
Device Overview gives general information on the motor, including requested period,
user name, device name, order code, firmware version, motor and system settings,
and motor total running time.
•
Status Overview summarizes the historical learned data and gives an evaluation of
the status of the motor, including the oldest and latest values of acceleration time,
starting current, start thermal capacity used, average motor load, average power and
power factor, and average running time. The data are extracted from the category of
Motor Starting Learned Information below.
•
Trip Summary gives a summary of the events that have tripped the motor.
•
Motor Operating History analyzes the operands in the Event Records to count the
amount of events in terms of Motor Starting/Running, Manual Stop Commands, Trip
Commands, Lockouts, Alarm Conditions, and Emergency Restarts.
•
Motor Starting Learned Information collects the learned data from the element of
Motor Learned Data, including acceleration time, starting current, start thermal
capacity used, average motor load, average power and power factor, and average
running time. Every time a successful start occurs, a Learned Data Record is created.
The relay stores the previous 250 Learned Data Records.
•
Motor Start Records displays the start data recorded in the element of Motor Start
Records, including average of three-phase RMS currents, ground current, average of
three-phase RMS voltages, real and reactive power, power factor, thermal capacity
used, frequency and motor status. When a motor start status is detected, a start data
record is triggered, where 1-second pre-trigger data and 59-second post-trigger data
are recorded. A total of 6 records are stored in the relay. Record # 1 is the baseline
record and it is written to only by the first start that occurs after clearing the motor
start records. The rest records are a rolling buffer of the last 5 motor starts.
•
Motor Stopping/Tripping gives details on the events that are specifically related to
the stopping and the tripping of the motor.
The analysis in Trip Summary, Motor Operating History and Motor Stopping/Tripping is
based on the classification of operands stored in the Event Records. The classification rules
are listed in the table below.
To ensure the listed operands are able to be classified, the Events function in the
associated elements needs to be enabled.
MOTOR HEALTH REPORT
8–3
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