LEESON's Inverter Rated Insulation system (IRIS™)
provides superior protection against voltage spikes induced by variable frequency drives. This total insulation system protects better than spike-resistant magnet wire alone. Specially formed phase insulation, cushioned and sleeved connections (from the leads all the way into the turns), and deep-penetrating, non-hygroscopic, high temperature varnish are just a few features contributing to extra protection. All this plus second generation spike-resistant magnet wire. The IRIS™ total insulation system is standard at no extra cost in all LEESON stock NEMA three-phase motors, 1 HP and larger.

These fan and blower duty motors are designed for dependable, enery saving performance in applications where the fan is mounted on the shaft of the motor. The permanent split capacitor design does not require a centrifugal switch, resulting in higher reliability than on other types of single phase motors. Because of lower running amperages, this design is more energy efficient and less expensive to operate.
These motors may be operated at listed speed or two speed operation may be achieved by using the proper auxiliary switch. They are suitable for variable speed by adjusting the voltage to the motor using a variable voltage control. §
Overload protected with an automatic reset protector. Built-in terminal panel for quick, easy connection. Grounding provisions.
Totally enclosed, dust-tight design, with resilient mounting for quiet operation. Lubricated with Shell Dolium R high temperature lubricant. Finished in epoxy paint for extra corrosion resistance in tough applications.
Because of the inherently low starting torques of this design, these motors are not suitable for belt-driven fan applications. They must be mounted within the air stream of the fan for cooling.