The Deragger II® is simple to integrate into any existing starter sections. In this entry we will be demonstrating the integration of the Deragger II® with a soft starter. This will demonstrate how you can get anti-ragging the easy way. Our device is perfect where a VSD replacement would be a costly alternative.
The device takes a run signal to start. This is taken from the start signal on the soft start. Remove the wires from the soft start and put them in the common and Input 1 on the Deragger II®. A volt free contact from the reset push button is wired into Input 3.
The Deragger II®’s patented anti-ragging technology relies on a reversing contactor to assist with the cleaning operation of three phase pumps. For retrofit purposes we recommend fitting a forward and reverse contactor on the output of the Soft start. We recommend Schneider contactors due to the slim profile.
The contactors are connected as shown below:
Use the N/O contacts of the forward and reverse contactors in parallel to start the soft start. This ensures the motor is connected before running the soft start. The Deragger® will then take control of the soft start via the forward and reverse contactors. The Deragger II® will allow the motor to coast to a stop before changing direction.
Next the overload is removed and the existing fault wires (N/O, N/C) are wire into output 3 and 4 of the Deragger II®. This is how to interface the unit with the panel’s trip circuitry and any telemetry that may be present.
The unit is now installed and ready to commission.