472104011U03 Stearns SINPAC Electronic Switch

CV Series for 115 Vac or 115/230 Vac Dual Voltage Capacitor Start Motors

Basic Operation

Capacitor start motors require a method to extract speed data from the voltage across the motor start winding. By comparing the start winding RPM-sensitive voltage with the main AC input voltage (which serves as a reference voltage), the switch determines when the start circuit should be energized. The electronic switch interrupts the start circuit current after the motor has accelerated to the cut out speed, and reconnects the start circuit whenever the motor speed has fallen to cut in speed (usually about 50% of synchronous motor speed).

1. Electrically Protected: Designed to filter out electrical noise, so there is no concern of random switch malfunction.

2. Reduced Installation Time: Easily accessible 1/4 inch terminals and mounting, reduce the amount of time required to install SINPAC Switches or to change out mechanical switches.

3. Restart Capability: When motor speed drops below 50% of synchronous speed, the start circuit is reconnected to reinitiate starting torque.

4. Soldered Heat Sink: High cycling.

5. Transient Protection: Transient protection tested per IEEE C62.41 – 1991 Category A3.

6. Universal Design 50/60 Hz operation. Will work on 2, 4 or 6 pole motors of any manufacturer. Reduced inventory.

7. Line Voltage Compensation: No modifications or changes are required for line voltage variations. SINPAC Switches will operate in areas susceptible to brownouts or low voltage due to long wiring runs. It also means there will be less stress on the starting capacitor due to over voltage.