Definite Purpose Motors –SD10 MS Multi-Speed

General Description

Our SD10 MS definite purpose motor for multi-speed is offered as a one winding, 1800/900 RPM Variable torque motor, ideal for both indoor and outdoor applications and in severe duty operating atmospheres, such as cooling towers.

Performance Specification

HP Range

1 - 250

Frame Size

140 - 440

Frame

Cast iron

Efficiency

Standard

Voltage

460 V575V

Service Factor

1.0

Insulation

Class F

Temperature Rise

Class B @ 1.0SF,

Class F @ 1.15SF *

Conduit Box (Oversized)

Cast iron

Fan Cover

Cast iron

Cooling Fan

Bi-directional - polypropylene

Rotor

Die Cast Aluminum

Vibration

0.08 IPS


Frame and End Shields

Cast iron construction for exceptional structural integrity and corrosion resistance. Condensation T-drains are provided. Lifting eyebolts are included for frames > 75 lbs.

Rotor

A unique rotor bar design provides improved efficiency while larger bars and end rings reduce resistance for lower rotor losses. Each die cast aluminum rotor assembly is dynamically balanced for extended bearing life, and includes a high strength carbon steel (C1045) shaft for maximum rotor performance.

Insulation

This insulation system meets or exceeds NEMA MG1-2010, Part 31, making all motors suitable for operation with adjustable frequency drives. All windings are tested for CIV.

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