GE Industrial Solutions ASTAT XT - Manual (Page 31)

31 • Control Keypad
Function &
Default
Range Unit Description
Current Limit
400% of Im
100-700% % of
Motor
Current Sets the motor’s highest current during starting.
A setting that is too high will increase the current drawn from
mains and speed up acceleration.
A setting that is too low may prevent the motor from
completing the acceleration process and reaching full speed. In
general, this setting should be set to a value that is high enough
to prevent stalling.
Current Limit
is limited to the value of:
<400x(Starter Current/Motor Current)>
with a minimum setting of 300% and a maximum
setting of 700%.
Note:
Current Limit
does not operate during RUN and SOFT
STOP.
Ramp UP Time
10 SEC.
1-30 30 sec. Sets Ramp UP Time of the motor.
Determines the motor’s voltage Ramp UP Time, from initial to
full voltage.
It is recommended to set the Ramp UP Time to the minimum
acceptable value (approx. 5 sec).
Notes:
Since Current Limit overrides Ramp UP Time, when
Current Limit
is set low, the starting time will be longer
than the Ramp UP Time setting.
When the motor reaches full speed before voltage reaches
nominal, Ramp UP Time setting is overridden, causing voltage
to quickly ramp-up to nominal.
Using Soft Start Curve 1, 2, 3 prevents quick ramp
up.
30 The range of the Ramp UP Time can be extended to 1-90 sec. by using the EXPANDED SETTING as described in section 5.5.5
page 50.