R. K. Automation

Aimed at prosperous growth in this domain, we are instrumental in offering an excellent quality range of Soft Starter.

• A soft starter is any device which controls the acceleration of an electric motor by means of controlling the applied voltage.
• In technical terms, a soft starter is any device which reduces the torque applied to the electric motor.
• It generally consists of solid state devices like thyristors to control the application of supply voltage to the motor.
• The starter works on the fact that the torque is proportional to the square of the starting current, which in turn is proportional to the applied voltage.
• Thus the torque and the current can be adjusted by reducing the voltage at the time of starting the motor.

• Improved Efficiency:The efficiency of soft starter system using solid state switches is more owing to the low on state voltage.
• Controlled startup: The starting current can be controlled smoothly by easily altering the starting voltage and this ensures smooth starting of the motor without any jerks.
• Controlled acceleration: Motor acceleration is controlled smoothly.
• Low Cost and size: This is ensured with the use of solid state switches.

We are dedicatedly involved in providing a wide array of Star Delta Starter.

• The operation of the star-delta method is simple and rugged.
• It is relatively cheap compared to other reduced voltage methods.
• Good Torque/Current Performance.
• It draws 2 times starting current of the full load ampere of the motor connected.

• For low- to high-power three-phase motors.
• Reduced starting current
• Six connection cables.
• Reduced starting torque.
• Current peak on changeover from star to delta.
• Mechanical load on changeover from star to delta.

• The star-delta method is usually only applied to low to medium voltage and light starting Torque motors.
• The received starting current is about 30 % of the starting current during direct on line start and the starting torque is reduced to about 25 % of the torque available at a D.O.L start. This starting method only works when the application is light loaded during the start. If the motor is too heavily loaded, there will not be enough torque to accelerate the motor up to speed before switching over to the delta position.