P56H1440-S-RU Reliance Electric General-Purpose Three-Phase Induction Motor

The P56H1440-S-RU is a compact, high-efficiency three-phase induction motor from Reliance Electric’s general-purpose motor series, designed to NEMA 56C frame standards. It delivers reliable performance for light to medium industrial loads and commercial applications, offering a cost-effective solution for continuous-duty operation in non-harsh environments.

This motor has a rated power of 1.5 horsepower and a nominal full-load speed of 1725 revolutions per minute at 60 hertz, featuring a 4-pole winding configuration for smooth, consistent torque output. The standard voltage rating is 230/460 volts AC, three-phase, making it compatible with most industrial and commercial power distribution systems. It utilizes a Class B insulation system, rated for a maximum operating temperature of 130 degrees Celsius, ensuring stable thermal performance under normal load conditions. The motor includes a 1.0 service factor, optimized for continuous operation at rated load without overload capacity.

Built with a lightweight yet durable NEMA 56C cast-iron frame, the P56H1440-S-RU provides structural stability while maintaining a compact footprint for easy installation in space-constrained areas. It features a Totally Enclosed Fan-Cooled (TEFC) enclosure, which protects internal windings and components from dust, dirt, and moisture, suitable for indoor industrial and commercial settings. An external cooling fan ensures effective heat dissipation during extended operation, preventing overheating and ensuring long-term reliability.

Equipped with high-quality sealed ball bearings at both ends of the rotor shaft, the motor minimizes friction and reduces maintenance requirements, supporting long service life with minimal lubrication. The output shaft is precision-machined with a standard keyway for secure connection to pulleys, gears, and small couplings. Designed for foot-mounted installation with standard NEMA 56C mounting dimensions, it enables easy alignment and attachment to equipment bases or mounting brackets.

The internal squirrel-cage rotor is dynamically balanced for smooth, low-vibration operation and quiet performance. Constructed with high-grade copper windings and adhering to strict factory quality control standards, the motor delivers consistent efficiency and low failure rates under typical operating conditions. It is compatible with across-the-line starters, contactors, and basic variable frequency drives, supporting straightforward integration into light industrial automation systems.

The P56H1440-S-RU is widely used in light industrial and commercial equipment, including small centrifugal fans, blowers, and pumps, conveyor systems for light materials, packaging machinery, woodworking equipment, and general-purpose machinery in workshops and commercial facilities. Its compact size, reliable performance, and versatile design make it an ideal choice for both original equipment manufacturing and direct replacement of older 1.5-horsepower motors in existing systems.