Electronic Centrifugal Switch (ECS) is a reliable solid-state switch that would duplicate the functions of the conventional centrifugal switch with additional benefits of the electronic device. Speed voltage induced in a start winding is constantly monitored by the voltage sensing circuitry of ECS, and the internal microcontroller calculates motor speed-torque curve in order to interrupt the start winding current at the point of breakdown torque detected. At this point, the motor speed normally accelerates to 60~80% of the synchronous speed. When the motor encounters overload conditions or the motor speed decreases to approximately 20~40% of the synchronous speed, ECS reconnects the start winding.

Design Features

- Extended life of contacts by using a reliable snubberless TRIAC

- Improved low-voltage motor starting efficiency

- Neither switching noise nor trembling of contacts

- High compatibility with general purpose motors as well as application specific motors

- Protects auxiliary winding circuits including starting capacitors from locked rotor

- Returns immediately from  instant reverse rotation due to unwanted mechanical shocks

- Easy selection of part numbers, nearly independent of motor ratings or drop-out voltages

- Easy installation and maintenance, mounted on inside/ outside standard motor frames

- sealed with epoxy resin, insensitive to dirt, dust, moisture, and vibration

- Normally open contacts, no electrical braking with power interruptions

- Discharges starting capacitors (for capacitor start motors only)

- Rohs compliant (Optional)

Application:  Refrigeration Compressors, Pumps (submersible), Fans and Blowers, Shredders, Hoists, Mixers, Tapping Machines, Refrigerators, Ice Makers, Gate lifts, Disposer and many others.