A3 Learned Data; Motor Starting; Average Motor Load - GE 469 Instruction Manual

469
Motor Management Relay

Motor Starting

MOTOR
STARTING

Average Motor Load

AVERAGE
MOTOR LOAD
6–22

A3 Learned Data

PATH: ACTUAL VALUES A3 LEARNED DATA
[ ] LEARNED ACCELERATION
TIME: 0.0 s
LEARNED STARTING
MESSAGE
CURRENT: 0 A
LEARNED STARTING
MESSAGE
CAPACITY: 0% used
LAST ACCELERATION
MESSAGE
TIME: 0.0 s
LAST STARTING
MESSAGE
CURRENT: 0 A
LAST STARTING
MESSAGE
CAPACITY: 0% used
The 469 learns the acceleration time, the starting current, as well as, the thermal
capacity required during motor starts. This data is accumulated based on the last
five starts. The 469 also keeps statistics for last acceleration time, last starting
current, and last starting capacity. This information can be reset to default using the
S1 469 SETUP INSTALLATION
If motor load during starting is relatively consistent, the
may be used to fine tune the acceleration protection. Learned acceleration time will
be the longest time of the last five successful starts. The time is measured from the
transition of motor current from zero to greater than overload pickup, until line
current falls below the overload pickup level.
LEARNED STARTING CURRENT
from zero to greater than overload pickup. This should ensure that the measured
current is symmetrical. The value displayed is the average of the last 5 successful
starts. If there are less than 5 starts, 0s will be averaged in for the full 5 starts.
The
LEARNED STARTING CAPACITY
capacity to permit a start (refer to Start Inhibit on page 5–55 for more information
on start inhibit). If there is not enough thermal capacity for a start, a start inhibit
will be issued. Starting will be blocked until there is sufficient thermal capacity.
PATH: ACTUAL VALUES A3 LEARNED DATA
[ ] AVERAGE MOTOR LOAD
LEARNED: 0.00 x FLA
The 469 can learn the average motor load over a period of time. This time is
specified by the
S1 469 SETUP
setpoint (default 15 minutes). The calculation is a sliding window and is ignored
during motor starting.
http://www.GEindustrial.com/multilin
MOTOR STARTING
Range: 0.0 to 200.0 sec.
Range: 0 to 50000 A
Range: 0 to 100%
Range: 0.0 to 200.0 sec.
Range: 0 to 50000 A
Range: 0 to 100%
RESET MOTOR INFORMATION
is measured 200 ms after the transition of motor current
is used to determine if there is enough thermal
AVERAGE MOTOR LOAD
Range: 0.00 to 20.00
PREFERENCES AVERAGE MOTOR LOAD CALC. PERIOD
A3 Learned Data
setpoint.
LEARNED ACCELERATION TIME
GE Multilin