SEL-701-1 Monitor
Date Code 20011009
Metering & Monitoring
Motor Operating Statistics
7.8
Motor Operating Statistics
The SEL-701-1 Monitor retains useful information regarding the protected motor.
The serial port MOTOR command and front-panel Motor Statistics commands make
the stored data available. The data also appear in the Modbus memory map. Items
included in the report are shown below.
NOTE:
While the monitor power is off, the elapsed timers do not
advance. If monitor power is off for a significant time, the
elapsed calendar time will not match the elapsed time
recorded by the monitor.
Times & Totals
The monitor records the total time that the motor is running and stopped, then
divides the running time by the total time to indicate a percent time running. These
figures provide an indication of the amount of use that the motor is receiving. The
monitor also records the total megawatt-hours consumed by the motor and the total
number of motor starts that have taken place.
Average & Peak Data
To help you discern operational trends early, the monitor records the average and
peak of a number of key measurements, listed below. Some of these measurements are
dependent on the presence of optional voltage inputs and RTD inputs. The monitor
stores average and peak values of:
Starting time in seconds.
Starting current.
Minimum starting voltage.
Starting % Thermal Capacity
(if the setting SETMETH=OFF, the monitor will always report 0.0).
Running % Thermal Capacity
(if the setting SETMETH=OFF, the monitor will always report
999.9).
RTD % Thermal Capacity.
Running current.
Running kW, kVAR, and kVA.
Hottest winding RTD temperature.
Hottest bearing RTD temperature.
Ambient RTD temperature.
Hottest other RTD temperature.
Содержание SEL-701-1
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