3 special starting using dual settings – GE Industrial Solutions ASTAT XT User Manual
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• Starting Procedure
Upon START the voltage and current increase until the current reaches the Current Limit value. The voltage
remains at this value until the motor reaches close to nominal speed, where current starts to decrease and voltage
continues to ramp-up to nominal.
6.2.3
Special Starting Using DUAL Settings
Using two starting characteristics, the ASTAT-XT will accelerate using standard characteristics (Starting
Voltage
, Ramp UP Time and Current Limit). After transition (tx), Immediate Relay (RUN relay) ON Delay,
voltage to input terminal 8 is switched ON using the DUAL Settings characteristic to complete acceleration.
Perform the following steps:
•
To use DUAL Settings automatically, connect immediate relay in series to input terminal 8 as shown in section
•
Program Immediate Relay (RUN relay) ON Delay to tx.
•
Program PROG. Input #8 to DUAL Settings (default setting).
•
Program standard parameters and DUAL Settings parameters as shown in the table below.
•
Using two starting characteristics, the ASTAT-XT will accelerate to reach the 200% current limit. After tx voltage to
PROG. Input #8
is switched ON, using the DUAL Settings characteristic to complete acceleration.
Parameter
Standard Parameter
DUAL Settings Parameter
Starting Voltage
10%
25%
Ramp UP Time
t1 = 2-30 sec
t2 = 2-30 sec
Current Limit
200%
300-400%
Relay ON Delay
tx = 1-60 sec.
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