Single Phase Power Solutions (SPPS) recently introduced a 75 hp single-phase electric motor to power industrial equipment like pumps, conveyors, grain dryers, and many types of industrial or commercial machinery.  The Belle Single-Phase Motor uses Written-Pole technology to deliver a 75 hp single-phase motor that is compatible with readily available single-phase utility services.  The utility-friendly starting and operating characteristics provided using Written-Pole technology minimize voltage sags and flicker on long single-phase distribution lines. Ideal for industrial applications in areas where three-phase power is not readily available or cost-effective, this technology eliminates the need for phase converters or complex variable frequency drive installations.

Featuring a totally enclosed fan-cooled design in a cast iron frame, this proven design is suitable for indoor or outdoor installation in some of the most demanding environments and applications.  Rated as a 75 hp, 460 v, 1,800 rpm electric motor, this innovative design delivers 95.0% efficiency at rated load with a near-unity power factor.  The NEMA 445T frame motor weighs about 1,920 pounds and draws just 170 amps at full load.

The motor windings are fabricated using high-grade copper and Class H insulation materials similar to those used in premium three-phase electric motors.  The design eliminates brushes, slip-rings and internal rotary switches, ensuring superior performance and reliability under harsh conditions.

Available in ratings from 30 - 100 hp, Belle Motors are ideal for many industrial, agricultural, mining, municipal, and oil& gas applications such as pumps, compressors, injection wells, as well as blowers, fans, dryers, water and wastewater processing and more.   

The starting current draw of a Belle Motor is less than two times its rated full-load current, resulting in a starting demand that is less than 1/4 of conventional single or three-phase electric induction motor.  The soft-start design, accomplished without reduced-voltage starting, dramatically increases the maximum horsepower rating that may be started and operated on rural single-phase utility distribution systems.  

Due to their synchronous operation, Belle Motors achieve levels of energy efficiency comparable to premium-efficiency three-phase motors, reducing energy bills and operating costs when compared to three-phase motors operated with phase-converters or stationary diesel engines often used to power rural applications.  

Each factory-assembled and tested, industrial-grade Belle Motor Control Panel contains all the control components required to start and operate a Belle Motor.  Their simple design and spacious outdoor rated control cabinet allow for easy field installation using local electricians.  High-grade industrial control components are used in a capacitor start/run configuration that uses intelligent logic to optimize starting and running performance. Over-temperature, under-speed and over-load protection supported by intelligent diagnostics are also included as standard features in every control panel, further easing installation and ensuring long-term reliability in the field.

The inherent soft-start characteristics of Belle Motors provide low starting demands and flexible starting characteristics that are compatible with utility power quality requirements. The low in-rush, soft-start design allows many high inertia loads to start without overheating and support the capability for instantaneous restarts following momentary power interruptions without risking damage to driven equipment.

A Belle Motor can serve as a cost-effective replacement of stationary engines used to power many rural applications. The ability to use readily available single-phase utility services for electric motors up to 100 hp allows for a 50-75% reduction in energy costs, simplified environmental compliance, reduced maintenance requirements and superior long-term performance. Re-fueling schedules and monitoring are no longer a concern when using Belle Motors.