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Amicon Drive Systems / Products / Softstarts /

midiSTART - Softstarter dST series, from 4 up to 900kW

* Three-phase power supply: 230 V AC -15% ... 690 V AC
   +10%, 50/60 Hz ±2 Hz
* Output power: from 4 to 900kW (@ 400V)
* Protection degree: IP20
* Perfect for use with all types of AC induction motors

Product Certifications:


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midiSTART is the high performance solution for the smooth, easy starting of three phase induction motors. Its advanced features and flexibility allow superior motor control/operation.

Programming can be as basic or advanced as needed with the multilevel programming feature. Setup is a breeze and you still have the ability to master the toughest applications. The parameter configuration via keypad or via serial line (option) makes the product highly versatile in any application and places it at the top of its class. Exceptional features, advanced diagnostics and the high reliability make midiSTART the first choice for trouble-free softstart applications.


400Vac – 15%+10% power supply
Power supply frequency: 50/60 Hz ± 2 Hz
Ambient temperature: from 0 to 40°C, from +40°C …+60°C with a linear derating corresponding to 2% of the maximum current for each degree.
Humidity: from 5% to 85% Relative humidity (non-condensing), not higher than 50% at 40°C.
Altitude: up to 1000 meters without current limits; 1% derating of the maximum current every 100 meters up to a maximum height of 2000 meters.
EMC emission level: easySTART complies with the basic EN55011 norm for class A devices.


Fully digital control
Top of ramp and fault relay
Phase loss protection at starting
Overcurrent “shear-pin” protection
Control input for run/stop
Select from 10 pre-programmed soft starting profiles
Start time from 1 up to 15 seconds
Stop time from 0 up to 15 seconds


PLUS card (SXD59)
Expansion card: 3 analog inputs (V and I), 1 thermal input, 1 digital input, 2 analog outputs, 2 digital outputs, RS232 serial line