The Three-Phase Rheostat, Model 8731, comprises three rheostats mounted on a common shaft directly controlled by a single knob on the module faceplate.  This allows simultaneous and equal variations in resistance in all three-phase legs. The rheostats are electrically interconnected in a four-wire star (wye) configuration and each leg is protected from over-current conditions by a thermal-magnetic circuit breaker.  This module is mainly used for speed control of a Three-Phase Wound-Rotor Induction Motor. However, because of the four-wire configuration, the module can also be used for other applications where a variable power resistance is needed.

Input Power: 120V, 60 Hz
Language: English
Resistance (line-neutral): 16 ohm
Total Power: 192 W
Max Current (per phase): 2A
Dimensions approx: 6 x 11 x 17
Weight approx: 11 lbs