A3 Learned Data; Motor Starting - GE 469 Instruction Manual

CHAPTER 6: ACTUAL VALUES
6.4

A3 Learned Data

6.4.1

Motor Starting

MOTOR
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469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
PATH: ACTUAL VALUES
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STARTING
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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
RESET MOTOR INFORMATION
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
to permit a start (refer to Start Inhibit on page 5–66 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.
A3 LEARNED DATA MOTOR STARTING
LEARNED ACCELERA-
TION
TIME: 0.0 s
LEARNED STARTING
CURRENT: 0 A
LEARNED STARTING
CAPACITY: 0% used
LAST ACCELERATION
TIME: 0.0 s
LAST STARTING
CURRENT: 0 A
LAST STARTING
CAPACITY: 0% used
settings.
is measured 200 ms after the transition of motor current
is used to determine if there is enough thermal capacity
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%
S1 469 SETUP INSTALLATION
LEARNED ACCELERATION TIME
6–27