Rugged Construction

Cast iron frame, end brackets, conduit box, and fan cover enhance the motor’s strength and durability.

Drain and Breathers

Stainless steel drain and breathers at the lowest points of the motor frame prevent corrosion.

Ingress Protection

Non-sparking brass V-ring shaft slingers on both ends of the shaft provide IP56 protection against 100% humidity, enhancing motor durability, safety, and corrosion resistance in harsh environments.

Insulation with Wide Thermal Capability

Class F-rated insulation system with Class H varnish and magnet wire, along with a low-temperature rise at rated conditions, provides large thermal margins for extended life and reliability. The life of the insulation doubles for every 10 degrees run below the insulation rating.

Inverter Duty Rated

Designed for use with adjustable speed drives (ASD) for energy savings at optimum fan speed, it features an insulation system that meets NEMA MG1 Part 31 standards and can withstand sharp voltage spikes up to 2000 V in 0.1 μs.

Low Vibration

By exceeding NEMA® vibration requirements, mechanical integrity, and stability are preserved, extending motor and bearing life and reducing downtime for more reliable and efficient operation.

Oversized Bearings

Oversized 300 series bearings on both the drive and non-drive ends are used to enhance durability in diverse operating conditions, significantly extending motor service life and minimizing the risk of premature failure. These robust bearings enable the motor to last up to ten times longer than those with smaller bearings.