Basic Operation
Capacitor start motor 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).
Capacitor start motor 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).
Unit of Measure
Specifications
Typical Maximum Motor |
N/A 1/2 hp |
Typical
|
N/A 8 A |
Typical
|
N/A 8/4 A |
Switch Rating
|
N/A 16 A |
Start Circuit Voltage |
N/A 115 V |
Part Number |
N/A 4-7-21016-11-UB1 4-7-21016-20-UB1 |
Typical Cut Out Voltage |
N/A 147 V |
Typical Cut In Voltage |
N/A 37 V |
Package Style |
N/A 11 20 |
Certification |
N/A CSA |
Additional Features
N/A
|