Soft Starter Sizing/Selection: Please see below guidelines and contact us for verification if necessary:
- Do not use a Motor with Amp rating less than 20% than that of the Amp rating of the Soft Starter.
- Select a Soft Starter (kW) of two sizes larger than the Motor (kW) for:
- Heavy/High Duty (Industrial) Applications (high torque requirement at start-up, e.g., Crusher, Ball Mill, Compressor with 6 Poles or more) requiring 7 or more starts per hour.
- Select a Soft Starter (kW) size larger than the Motor (kW) for:
- Heavy/High Duty (Industrial) Applications requiring less than 7 starts per hour.
- General Duty Motors with 6 Poles or more (if torque is high).
- Low Duty (low torque requirement at start-up, e.g., Fan, Centrifugal Pump) Motors with 8 Poles or more.
- Low Duty Applications requiring more than 20 starts per hour.
- Low Efficiency Motors (e.g., submersible borehole pumps).
- For use in areas with altitude over 2000m or ambient temperatures above 40 degrees Celsius (preferably use forced cooling, ambient temperature must always be less than 50 degrees). Please Derating Specifications for more info as well as Cooling/Panel Fan Selection specifications.
Please Note:
- All units have Plastic Covers (top control unit) and a Metal Base (box).
- Prices for spares available on request only (includes items such as keypad, fans, fan board, thyristors, control board).
- Please refer to each specific model’s User Manual for important details regarding product Installation, Setup, Safety Information, Precautions and Maintenance
- Optional RS485 Cards are available on request for GS models and optional custom Control Boards with RS485 communication for GW
- For installations in enclosures, device keypads can be removed and installed into enclosure doors using additional keypad extension cables.
- Use the Soft Starter to Start and Stop the Motor, do not disconnect the supply from the Soft Starter to the Motor while it is running. Also do not disconnect the power supply to the Soft Starter while it is running the Motor.
- Soft Starters are not recommended for applications where the cable length between the Soft Starter and Motor is more than 150m (for very light duty applications it can be considered up to 200m).
- Please use Copper power cables between the Soft Starter and Motor rather than Aluminium cables (impedance of Aluminium cables are higher).
