5HP Three Phase Motor
What is a 5HP Three Phase Motor?
The 5HP three-phase motor (rated power 4KW) is a highly adaptable, high-torque, medium-power three-phase asynchronous motor for industrial applications. It strictly adheres to the IEC 60034 international rotating electrical machine standard and domestic GB production specifications, featuring heavy-load start-up, continuous full-load operation, high energy efficiency, and low loss characteristics. It perfectly fills the industry gap between insufficient power from small-power motors and excessive energy consumption from large-power motors. This 4KW three-phase motor comes standard with an IE3 ultra-high efficiency rating, uses a thickened cast iron body and all-pure copper thickened windings, has an insulation class of F, a protection class of IP55, and supports 50Hz/60Hz global dual-frequency operation, making it suitable for demanding industrial scenarios such as heavy loads, frequent starts and stops, and continuous operation.
- High torque for heavy-load starting and enhanced overload capacity. Compared to conventional 3HP and 4HP motors, the 5HP 4KW motor features an optimized stator and rotor slot design, increasing starting torque by over 30%. It can easily handle heavy-load static starts and instantaneous load impacts. Equipped with a dedicated overload protection design, it operates at 1.25 times its rated load for short periods without tripping or burning out, completely resolving the problems of weak starting, load jamming, and frequent overload faults in small and medium-sized motors under heavy loads. It is suitable for high-frequency start-stop operations in heavy industrial equipment.
- Thickened pure copper windings for high temperature resistance and aging resistance. The motor features thickened high-purity copper enameled wire windings with a larger conductive cross-sectional area and stronger current carrying capacity. Combined with vacuum pressure impregnation and high-temperature curing processes, the overall sealing and insulation of the windings are significantly improved. F-grade high-temperature resistant insulation material allows for long-term tolerance to high-temperature conditions, ensuring stable temperature rise during continuous full-load operation. This eliminates the risk of overheating, aging, insulation breakdown, and winding burnout in medium-power motors, extending the overall service life of the motor by more than 25% compared to ordinary motors.
- IP55 High-Level Protection, Dedicated to Harsh Working Conditions. Upgraded to IP55 dust and water protection, compared to the standard IP54 motor, it effectively resists the intrusion of fine dust, sprayed water vapor, industrial debris, and humid mist, making it perfectly suited for harsh working conditions such as mines, chemical plants, aquaculture, outdoor heavy industry, and humid workshops. The fully enclosed, one-piece cast iron body is rigid, impact-resistant, and deformation-resistant, ensuring vibration-free operation under high loads and stable long-term operation in complex industrial environments.
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Model |
5HP Three phase motor |
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Frame |
112 |
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Power |
5 Horse power 4KW |
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Speed |
3000rpm, 1500rpm, 1000rpm |
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Voltage |
220/380V, 230/400V, or customization |
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Frequency |
50HZ/60HZ |
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Efficiency |
IE1, IE2, IE3, IE4 |
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Motor shaft diameter |
Φ28 |
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Cooling |
Fan |
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Protection |
IP44/IP54/IP55 |
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Housing |
Aluminum/Cast Iron |
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Ambient temperature |
-15℃≤0℃≤40℃ |
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Altitude |
No exceeding 1000 meters |
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Duty |
S1 |
Installation position
Q: Does a 5HP three-phase cast iron motor require protective treatment for long-term outdoor use?
A: This IP55-rated 5HP motor has basic dust and water resistance and can be used directly in open-air, ventilated, and generally humid outdoor conditions. For prolonged exposure to sunlight, rain, and highly corrosive outdoor environments, it is recommended to select a rain cover and install a waterproof sealing kit for the wiring. This will effectively prevent aging of the motor's paint and oxidation of the wiring terminals due to moisture, significantly extending its outdoor service life. It is suitable for long-term outdoor operations such as outdoor engineering, agricultural irrigation, and other similar scenarios.
Q: What problems occur when a 4kW three-phase motor operates with a single phase loss? How can it be prevented?
A: Single phase loss in a three-phase motor is a common fault in heavy industrial equipment. It can cause rapid overheating of the motor body, sudden drop in power, abnormal noise and vibration, frequent tripping, and can burn out the pure copper windings in a short time. Prevention in daily use can be achieved by installing a single phase loss protector, regularly checking the tightness of the wiring terminals, and testing the three-phase voltage balance. Our factory's motors have robust winding construction, and when used with proper protective measures, the risk of burnout due to single phase loss can be completely avoided.
Q: Can the 5HP motor be customized with non-standard shaft diameters and mounting dimensions?
A: Yes, we support full-dimensional non-standard customization to meet the modification needs of non-standard equipment worldwide. Different output shaft diameters, shaft lengths, and keyway dimensions can be customized as needed. Installation parameters such as the B5 flange outer diameter and foot hole spacing can also be fine-tuned.
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