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Baldor-Reliance EM3546 three-phase motor, steel frame, closed base, fan-cooled enclosure

Baldor Electric

Baldor Electric EM3546 Three-Phase Motor 1 HP 56 Frame 1760 rpm 208-230/460V

SKU CH-QJ4S-XPHM5

A three-phase general-purpose motor delivering 1 hp at 1760 rpm in a 56-frame steel enclosure

  • weight35.25
  • typeClosed Base
  • materialHAWA
  • 1 HP three-phase power for industrial drives
  • 1760 rpm nameplate speed matches common load requirements
  • 208-230/460 V dual-voltage winding simplifies wiring
  • 5 % nominal efficiency reduces energy cost
  • Steel frame with ball bearings handles continuous duty

General-Purpose Three-Phase Motor

The Baldor-Reliance EM3546 is a 1 HP three-phase motor built for continuous-duty industrial applications. It operates at a nameplate speed of 1760 rpm on 208-230/460V AC at 60 Hz. The NEMA 56 frame steel construction with a rigid base suits fixed-mount machinery installations.

Enclosure and Protection Features

A totally enclosed fan-cooled enclosure protects internal windings from dust and moisture in harsh shop environments. Class F insulation and a 1.15 service factor provide thermal margin for sustained loads. Ball bearings support the shaft, which rotates in either direction for flexible drive configurations.

Suited Applications and Limitations

This motor fits conveyors, pumps, and fans requiring 1 HP at 1760 rpm with three-phase power available. Operations needing integrated thermal overload protection, a different frame size, or single-phase input must select another model.

Highlights

  • 1 HP three-phase power for industrial drives
  • 1760 rpm nameplate speed matches common load requirements
  • 208-230/460 V dual-voltage winding simplifies wiring
  • 5 % nominal efficiency reduces energy cost
  • Steel frame with ball bearings handles continuous duty

Specifications

BrandBALDOR ELECTRIC
weight35.25
typeClosed Base
materialHAWA

Questions about this item

How often do the ball bearings in this 56 frame motor need greasing or replacement?

The motor uses sealed ball bearings that are lubricated for life; no scheduled greasing is required under normal 40 °C ambient conditions.

What thermal limit stops continuous operation first when the motor runs at full load?

Class F insulation with a 1.15 service factor allows continuous duty up to the 40 °C maximum ambient temperature before thermal protection would intervene.

How much heat and noise does the totally enclosed fan cooled design produce during all-day running?

At 85.5 % nominal efficiency and 1760 rpm, the TEFC enclosure dissipates losses quietly through its external fan while keeping surface temperatures within the 40 °C ambient rating.

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