Open Motor Starters

An Open Motor Starter is a device or a group of devices that serves to govern in some predetermined manner the performance of an electric motor. An Open Motor Starter might include a manual or automatic means for starting and stopping the motor, selecting forward or reverse rotation, selecting and regulating the speed, regulating or limiting the torque, and protecting against overloads and faults.

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NEMA Size 0
NEMA Size 1
NEMA Size 2
NEMA Size 3
NEMA Size 4
 

NEMA Size 0
NEMA Size 0 has 18 max. continuous amperes. The max. HP at 200 V, AC is 3. Max. HP at 480/575 V, AC is 5.

NEMA Size 1
NEMA Size 1 has 27 max. continuous amperes. The max. HP at 200 V, AC is 7.5. Max. HP at 480/575 V, AC is 10.

NEMA Size 2
NEMA Size 2 has 45 max. continuous amperes. The max. HP at 200 V, AC is 10. Max. HP at 480/575 V, AC is 25.

NEMA Size 3
NEMA Size 3 has 90 max. continuous amperes. The max. HP at 200 V, AC is 25. Max. HP at 480/575 V, AC is 50.

NEMA Size 4
NEMA Size 4 has 135 max. continuous amperes. The max. HP at 40 V, AC is 25. Max. HP at 480/575 V, AC is 100.