GE ASTAT XT QT 0008U Series, Руководство пользователя

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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
6.2.3.1 below.
•
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. -----