200 HP / 50 HP Dual-Speed (575V) TEFC Electric Motor — Frame 447TZ

Item Overview

This listing is for a heavy-duty 200 HP / 50 HP Dual-Speed 3-Phase Electric Motor. This is a highly specialized, 575-volt motor designed for demanding industrial applications that require two distinct operating speeds (e.g., large cooling tower fans, massive blowers, or specialized pump drives).

The motor was professionally serviced, tested, and tagged by EMS Electric Motor Service Limited in Edmonton, AB. It appears to have been kept as a ready-to-deploy spare since that time. It is strapped to a heavy-duty pallet and wrapped in plastic for protection.

Motor Specifications

•Manufacturer: Etatech Industries Inc. — Made in Brantford, ONT, Canada

•Horsepower (HP): 200 HP (High Speed) / 50 HP (Low Speed)

•Voltage: 575 Volts AC

•Phase / Frequency: 3 Phase / 60 Hz

•RPM: 1785 RPM (4-Pole) / 890 RPM (8-Pole) — Dual Speed

•Full Load Amps: 186 A (High Speed) / 62 A (Low Speed)

•Frame Size: 447TZ

•Enclosure: TEFC (Totally Enclosed Fan Cooled)

•Service Factor (S.F.): 1.15

•Insulation Class: F

•Max Ambient Temp: 40°C

•Bearings (Drive End / Opp. End): 6319ZZ / 6315ZZ

•Additional Features:

•120V / 300W Space Heater installed (prevents condensation during standby)

•Thermistors Fitted (for advanced temperature monitoring)

•Model Number: 6958830

•Serial Number: GC2068-3

Application

A custom application tag riveted to the motor body confirms its original purpose: Cooling Water Tower Fans at Syncrude's facility (Tag No.: 7130 TFM/3, PO No.: 1HWP71300-01-01). The motor is rated for Forward and Reverse rotation, a critical feature for cooling tower fans in cold climates — reverse rotation is used to de-ice the fan deck and fill during Alberta winters.

The 1785 / 890 RPM dual-speed configuration (4-pole / 8-pole) is the industry standard for cooling tower fan drives. The operator runs the fan at half-speed (890 RPM, 50 HP) during cooler weather or lower load conditions, and switches to full speed (1785 RPM, 200 HP) during peak summer heat. The built-in 120V/300W space heater prevents condensation during standby, and the thermistors provide winding temperature protection — both features confirm this was purpose-built for a critical, outdoor, severe-duty application.