Specifications

Softstart UK Operation
• 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 flywheel loads such as presses).
Current
(%motor full load current)
1
2
6
4
5
3
1: Kickstart level (parameter 2E)
2: Kickstart time (parameter 2F)
3: Initial current (parameter 2C)
4: Start ramp time (parameter 2D)
5: Current limit (parameter 2B)
6: Full voltage current
Rotor speed (% full speed)
7.6. 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.
• 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.
• TVR Soft Stop
Timed voltage ramp reduces the voltage to the motor gradually over a defined time. The load may continue to
run after the stop ramp is complete.
Timed voltage ramp stopping can be useful for applications where the stop time needs to be extended, or to
avoid transients on generator set supplies.
Voltage (% full voltage)
1
1: Stop time (parameter 2I)
Time
710-15797-00A – LV-DS User Manual 27/64