GE M60 UR Series, Instruction Manual

Page: 436 / 662

6-26 M60 Motor Protection System GE Multilin
6.4 RECORDS 6 ACTUAL VALUES
6
6.4.3 MOTOR LEARNED DATA
PATH: ACTUAL VALUES

RECORDS

MOTOR LEARNED DATA
The
NUMBER OF RECORDS
value indicates how many records are available to the user through the EnerVista UR Setup soft-
ware or via HTTP with Internet Explorer. The
LAST CLEARED DATE
value indicates the last time that learned data records
were cleared.
The values for the last motor start-running-stop cycle are available in this menu. The
LAST AVRG MOTOR LOAD LEARNED
value is computed during motor running conditions at intervals defined by the
MOTOR LOAD AVERAGE CALC. PERIOD
setting.
This value is updated whenever new values become available.
Up to 250 motor learned data records are stored and accessible via the EnerVista UR Setup software through the following
methods.
• Select the Actual Values > Records > Motor Learned Data menu item.
• Select the Maintenance > Retrieve File menu item and open the “MotorLD.htm” file.
• Select the Maintenance> Retrieve File menu item and open the “MotorLD.txt” file.
The following historical data is displayed in the motor learned data records.
• Report number.
• Report date.
• Learned acceleration time (in seconds).
• Learned starting current (in multiples of full load current).
• Learned starting capacity (in percent).
• Learned average motor load (in multiples of full load current).
• Learned run time after start (in hours).
The learned values for acceleration time and effective starting current are the maximum of the individual values acquired
for the last
N successful starts, where N is defined by the
NUMBER OF STARTS TO LEARN
setting.
The learned value for the starting thermal capacity is calculated using the maximum of the last motor start measurements
and incorporates a security margin defined by the
SETTINGS

GROUPED ELEMENTS

SETTING GROUP 1(6)

MOTOR

THERMAL MODEL

START INHIBIT TCU MARGIN
setting. For example, if the thermal capacity used for the last five starts is
24, 23, 27, 26, and 21%, respectively, with the
START INHIBIT TCU MARGIN
= 25%, then the
LEARNED STARTING CAPACITY
is
27% × 1.25 = 33.75%.
Learned values associated with motor acceleration require the acceleration time function to be enabled. The
learned features are not be used until at least
N + 1 successful motor starts have occurred.

MOTOR LEARNED

DATA
NUMBER OF RECORDS:
0
Range: 0 to 250
MESSAGE
LAST CLEARED DATE:
2007/07/14 15:40:16
Range: date and time in standard format
MESSAGE
LAST ACCELER. TIME
LEARNED: 0.00 s
Range: value in seconds
MESSAGE
LAST STARTING CURR.
LEARNED: 0.00 x FLA
Range: value in multiples of full load current
MESSAGE
LAST STARTING CAPAC.
LEARNED: 0%
Range: value in percentage
MESSAGE
LAST AVRG MOTOR LOAD
LEARNED: 0.00 x FLA
Range: value in multiples of full load current
MESSAGE
LAST RUN t AFT. STRT
LEARNED: 00:00 hr
Range: value in hours
NOTE