Wound Rotor Motor Resistor


Description:

In wound rotor motors, the conductors in the rotor (or secondary) are connected to slip rings. The internal brushes make electrical contact with the slip rings and are connected to an external resistor circuit. By varying the external resistance, the rotor current can be changed to control the starting torque and speed of the motor to meet the requirements of any installation.

Nema Class 100: 30 seconds ON out of each 15 minutes.

Nema Class 110: 5 seconds ON out of each 80 seconds.

Nema Class 130: 10 seconds ON out of each 80 seconds.

Nema Class 140: 15 seconds ON out of each 90 seconds.

Nema Class 150: 15 seconds ON out of each 60 seconds.

Nema Class 160: 15 seconds ON out of each 45 seconds.

Nema Class 170: 15 seconds ON out of each 30 seconds.

Nema Class 90: Continuous Duty

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Powerohm Resistors, Hubbell ICD / 5713 13th Street / Katy, Texas 77493