Dayton
Dayton 31LH31 3-Phase Motor 1 HP 56H 230/460V AC
Three-phase general-purpose motor delivers 1 HP at 1760 RPM with dual 230/460 V AC operation and 83.5 % nominal efficiency
- 1 HP three-phase power for demanding HVAC applications
- 230/460 V dual-voltage operation suits varied supplies
- 5 % nominal efficiency reduces energy consumption
- 15 service factor handles continuous overload conditions
- 56H frame with rigid base simplifies direct replacement
Three-Phase Motor for 230/460V Systems
The Dayton 31LH31 is a general-purpose three-phase motor rated at 1 HP with a 56H frame. It suits industrial machinery, HVAC equipment and other fixed installations that run on dual-voltage AC supplies. The open drip-proof enclosure and rigid base mounting simplify integration into existing drive trains. Continuous-duty rating and Class F insulation support long operating cycles.
Dual-Voltage 230/460V AC Input
The motor operates on both 230 V and 460 V three-phase power at 60/50 Hz, drawing 3.14 A at the lower voltage and 1.57 A at the higher voltage. Nameplate speed is 1760 RPM with a nominal efficiency of 83.5 percent. A service factor of 1.15 provides a modest overload margin. Verify that your supply and starter match these electrical parameters before installation.
No Thermal Protection Included
The unit ships without built-in motor thermal protection, so external overload relays or a motor starter with integrated protection must be provided by the installer. Ball bearings and a steel frame are factory-fitted; no additional accessories, cables or software are supplied. Buyers who need an internally protected motor or a pre-wired starter kit should select a different model.
Highlights
- 1 HP three-phase power for demanding HVAC applications
- 230/460 V dual-voltage operation suits varied supplies
- 5 % nominal efficiency reduces energy consumption
- 15 service factor handles continuous overload conditions
- 56H frame with rigid base simplifies direct replacement
Specifications
| Brand | DAYTON |
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Questions about this item
What does the 1 HP rating actually deliver on the shaft in a real installation?
The motor produces 1 HP at 1760 RPM under continuous duty, with a 1.15 service factor allowing short-term overload to about 1.15 HP without overheating.
How does the 230/460 V dual-voltage design affect wiring and starter selection?
The windings can be reconnected for either 230 V or 460 V three-phase supply; at 230 V the full-load current is 3.14 A and at 460 V it is 1.57 A, so size contactors and overloads accordingly.
Will the 56H frame bolt directly to my existing NEMA 56 mounting pattern?
Yes, the rigid-base 56H frame uses standard NEMA 56 hole spacing with a longer shaft height, so it fits existing 56 mounting holes while providing the taller shaft centreline.
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