Overview Product Description MARATHON Y572 ENCODER MOTOR 50 HP 1800 RPM 326T FRAME 3 PHASE 230/460 VOLT TEFC REVERSIBLE 2.125" X 5.25" KEYED SHAFT 34.07" C-DIMENSION FEATURES: MAX GUARD® Class H insulation system Constant torque operation from 0 to base speed on vector drive, including TEFC (On Volts/Hertz drives, TEFC motors are limited to 20:1 constant torque Constant HP operation to twice base speed (143-256 frame);1.5 times base (all others) Optimized for operation with IGBT inverter (NEMA Design A) Normally closed thermostats (one per phase, class F) Blue Chip quality, cast iron frame and brackets CROSS REFERENCES: 326THFS8028 326THFS8028EU Product Videos Custom Field Product Reviews