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Cooling Tower Fan Motor Specification

Views: 0 Author: Lisa Publish Time: 2025-09-24 Origin: Site

Cooling tower fan motor specifications depend on the tower size, type (open/closed circuit), fan drive (direct/gear/belt), and duty conditions.

Below are the common specifications you’ll find in a cooling tower fan motor datasheet:

Power Rating (kW / HP): Typically ranges from 3 HP for small towers to 200+ HP for industrial towers.

Voltage:

Low voltage: 380V / 400V / 415V (50 Hz), 460V (60 Hz)

Medium voltage: 3.3 kV / 6.6 kV / 11 kV (for large industrial towers)

Frequency: 50 Hz or 60 Hz

Phase: 3-phase AC

Efficiency Class: IE2 / IE3 / IE4 (depending on energy requirements)

Mounting: Vertical flange-mounted (for gear drive) or horizontal (for belt/direct drive).

Cooling: Totally Enclosed Fan Cooled (TEFC) or Totally Enclosed Air-to-Air Cooled (TEAAC).

Ingress Protection: IP55 / IP56 (suitable for outdoor, wet environments).

Insulation Class: Class F or H (with Class B temperature rise).

Bearings: Heavy-duty, greased-for-life or regreaseable.

Ambient Temperature: Typically up to 40–50 °C.

Altitude: Rated for up to 1000 m (higher ratings need derating).

Duty: S1 (continuous operation).

Corrosion Protection: Epoxy coating or tropicalization for cooling tower humidity and drift water exposure.

VFD compatible (for variable speed control).

Space heaters (to prevent moisture condensation when idle).

Special coatings for coastal/marine environments.

Explosion-proof or flameproof designs (for hazardous areas).

Example – Cooling Tower Motor (Typical 30 HP, 4-pole, TEFC, IP55):

Power: 22 kW (30 HP)

Voltage: 415 V, 3-phase, 50 Hz

Speed: 1480 RPM (4-pole)

Efficiency: IE3

Insulation: Class F

Protection: IP55

Duty: S1 continuous

Mounting: Vertical flange

PT company have kinds of cooling tower motor direct drive cooling tower motor and gear drive cooling tower, the voltage can be customized.