Digistart D3: User Guide
51
Issue: G
7.2.4 Kickstart
Kickstart provides a short boost of extra torque at the beginning of a start, and can be used in conjunction with
current ramp or constant current starting.
Kickstart can be useful to help start loads that require high breakaway torque but then accelerate easily (for example
helical rotor pumps).
C
ur
rent
(%m
ot
or
fu
ll l
oad
cur
rent
)
1
2
6
4
5
3
1:
Kickstart Level
(Pr 2F)
2:
Kickstart Time
(Pr 2G)
3:
Initial Current
(Pr 2C)
4:
Start Ramp Time
(Pr 2D)
5:
Current Limit
(Pr 2B)
6: Full voltage current
Rotor speed (% full speed)
CAUTION
Kickstart subjects the mechanical equipment to increased torque levels. Ensure the motor, load and
couplings can handle the additional torque before using this feature.
7.3 Stop Methods
Soft starters offer a variety of methods for the control of motor stopping.
Stop Method
Performance Result
Coast To Stop
Natural load run down
TVR Soft Stop
Extended run down time
Adaptive Control
Extended run down time according to selected deceleration profile
Brake
Reduced run down time
Soft starters are often used in pumping applications to eliminate the damaging effects of fluid hammer. Adaptive
Control should be the preferred stop method for these applications.
To stop the motor, press the
STOP
button on the keypad or activate the Stop remote input. The motor will stop
using the stop mode selected in Pr 2H.
7.3.1 Coast to Stop
Coast to stop lets the motor slow at its natural rate, with no control from the soft starter. The time required to stop will
depend on the type of load.
