![3 phase motor]( "3 phase motor")
Introduction to the 1 HP / 0.75 kW 3 Phase Motor
We recognize the 1 HP / 0.75 kW 3 phase motor as one of the most widely used industrial electric motors across manufacturing, processing, and material handling sectors. Its popularity stems from an ideal balance of power output, energy efficiency, durability, and operational stability. Whether installed in pumps, conveyors, compressors, or machine tools, this motor size delivers consistent performance under continuous and demanding conditions.
In modern industrial environments, reliability and efficiency are no longer optional. A 1 HP three-phase motor offers superior electrical efficiency compared to single-phase alternatives, while maintaining compact dimensions and manageable operating costs. As industries continue to automate and optimize production lines, the demand for this motor category remains strong and steadily growing.
This guide presents a detailed, practical, and technically accurate overview of the 1 HP / 0.75 kW 3 phase motor, covering specifications, working principles, advantages, applications, selection criteria, and maintenance considerations.
Understanding Power Rating: 1 HP vs 0.75 kW
We often see both horsepower (HP) and kilowatt (kW) ratings used interchangeably. In practical terms:
Manufacturers list both values to comply with international standards and regional preferences. In Europe and most global markets, 0.75 kW is the standard designation, while 1 HP is more commonly referenced in legacy systems and non-metric regions.
This power class is particularly effective for medium-duty industrial loads, providing sufficient torque without excessive energy consumption.
What Is a 3 Phase Motor and How It Works
A 3 phase motor operates using three alternating currents, each phase offset by 120 degrees. This configuration creates a rotating magnetic field, allowing the rotor to turn smoothly and continuously.
Key Working Principles
· Balanced power delivery
· Constant torque output
· Reduced vibration and noise
· Higher efficiency than single-phase motors
The rotating magnetic field eliminates the need for auxiliary starting components, resulting in simpler construction and enhanced reliability. This makes the 1 HP 3 phase motor particularly suitable for long operational cycles and industrial-grade machinery.
![Applications of 3-Phase AC Brake Motors]( "Applications of 3-Phase AC Brake Motors")
Technical Specifications of a 1 HP / 0.75 kW 3 Phase Motor
Rated Power | Frame Size | Pole | Rated Speed (RPM) | Efficiency (100%) | Power Factor (COS∅) | Rated Torque (N.m) | Weight (kg) |
kW | HP |
|
| 50Hz | 60Hz | IE2 | IE3 | IE4 | IE2 | IE3 | IE4 |
|
|
0.75 | 1 | 80 | 2 | 2880 | 3456 | 81.3 | 84.2 | 86.5 | 0.84 | 0.84 | 0.85 | 4.95 | 20 |
|
| 80 | 4 | 1420 | 1704 | 82.8 | 85.3 | 88.2 | 0.78 | 0.77 | 0.76 | 9.91 | 23 |
|
| 90S | 6 | 935 | 1122 | 79.8 | 82.5 | 85.9 | 0.72 | 0.74 | 0.71 | 15.1 | 29 |
|
| 100L | 8 | 685 | 822 | 70.1 | 72.8 | 82.6 | 0.70 | 0.71 | 0.69 | 20.6 | 40 |
Core Motor Specifications & Performance
✅Environmental & Operational Compatibility
1. Site Conditions
Victory motors operate reliably in most industrial environments:
· Temperature range: -15°C to +40°C (ideal for warehouses, factories, and outdoor shelters)
· Altitude: ≤1000 meters (compatible with urban plants, rural workshops, and low-to-moderate elevation facilities)
This versatility makes them suitable for global applications in non-extreme climates, with custom modifications available for extreme temperatures (-40°C to +50°C) or high-altitude sites (>1000m).
2. Insulation System
The motor’s insulation meets Class F (105K) performance standards (rated for 155°C continuous operation) and is validated via Class B (80K) testing. This dual compliance ensures an extended lifespan (20,000+ operating hours) and consistent reliability in 24/7 continuous-duty scenarios (e.g., manufacturing lines, water treatment pumps). For extreme-heat applications (e.g., foundries), Class H insulation (180°C max) is available as a customization.
3. Vibration & Noise Control
Engineered to Vibration Class A (low noise, minimal mechanical wear), our motors are ideal for precision equipment like packaging machines or medical tools. For quieter environments (e.g., laboratories) or sensitive instrumentation, Vibration Class B (smoother operation) can be requested to reduce operational disturbance.
4. Duty Cycle
Designed for Continuous Duty (S1) operation, our motors run indefinitely at rated load without overheating—perfect for non-stop applications: industrial pumps, ventilation fans, conveyor systems, and heavy machinery.
✅Electrical & Protective Features
1. Voltage & Frequency
Standard specifications: 380V/50Hz (global industrial grid standard). Customization options include:
· Single voltages: 200V–660V (e.g., 220V/60Hz for North America, 230V/50Hz for Europe)
· Frequency: 50/60Hz (or custom tuning for specialized needs like 400Hz aerospace applications)
Motors maintain optimal performance even with ±5% voltage fluctuations—critical for unstable power grids in remote or developing regions.
2. Motor Protection
Enhance safety and reduce downtime with optional PTC thermistors (overheat protection) or PT100 temperature sensors (real-time monitoring). These components trigger alerts or automatic shutdowns during overheating, preventing damage in high-load applications (compressors, conveyors) and lowering long-term repair costs.
3. Protection Class
Standard IP54/IP55 Ingress Protection (dust-tight, water-resistant) safeguards against particles and low-pressure water jets—ideal for humid/dusty workspaces (food processing plants, construction sites). For harsh environments (heavy rain, washdowns), IP65 (full dust tightness + high-pressure water resistance) is available on request.
4. Cooling & Ventilation
Victory-Motor uses Totally Enclosed Fan-Cooled (TEFC) technology (per IEC 60034-6, IC411):
· Seals the motor to block dust, moisture, and debris (critical for farms, mines, or dirty industrial areas)
· External fans ensure efficient heat dissipation, maintaining stable temperatures in high-torque, long-duration tasks
✅Construction & Material Quality
1. Winding
Constructed with 100% high-purity copper wire (not aluminum), our windings offer:
· Superior electrical conductivity (reduces energy loss and utility bills)
· Enhanced heat resistance (extends motor life in continuous operation)
· Better performance in high-load, long-duration tasks compared to alternative materials
2. Output Shaft
Standard cylindrical shaft with keyway; we offer custom shaft diameter/length (e.g., extended shafts for specific couplings, non-standard key sizes) to fit your equipment’s unique requirements.
![iec motor]( "iec motor")
Victory-Motor’s Manufacturing & Quality Assurance
1. Sufficient Raw Material Inventory
Victory-Motor maintains a robust, high-grade raw material inventory (premium copper windings, high-strength steel laminations, durable aluminum housings) sourced from certified global suppliers. This eliminates production delays, enables quick responses to urgent orders or sudden demand spikes, and ensures your projects stay on schedule—whether you need standard models or custom solutions.
2. Professional Production Equipment & Assembly Lines
Victory-Motor workshop features state-of-the-art equipment:
· CNC machining centers (precision component manufacturing)
· Automatic winding machines (consistent coil quality)
· Intelligent testing systems (real-time performance validation)
Fully automated assembly lines reduce human error, boost production efficiency, and ensure every motor meets international quality standards. We continuously upgrade equipment to align with the latest industry advancements.
3. 100% Quality Inspection
Quality is Victory-Motor cornerstone. Victory-Motor implements rigorous 100% inspection across the entire production process:
· Raw material verification (ensures compliance with specifications)
· In-process checks (monitors component accuracy)
· Final testing (assesses efficiency, torque, vibration, and insulation resistance via dynamometers, testers, and analyzers)
Adhering to the ISO 9001 quality management system, Victory-Motor guarantees defect-free motors that perform optimally in your applications.
Customization & Delivery Solutions
1. OEM/ODM Services
Victory-Motor offers comprehensive OEM/ODM services tailored to your unique needs:
· Collaborate with our engineers from design to final production
· Customize power, speed, size, voltage, housing, or branding (produce under your logo)
· Transparent processes and strict IP protection (confidentiality agreements included)
Leveraging our R&D and production expertise, we deliver cost-effective, high-performance solutions that align with your business goals.
2. Export-Standard Packaging & Delivery
Victory-Motor uses ISPM 15-compliant export-standard wooden boxes (high-density, moisture-resistant plywood) with foam padding and plastic wrapping for internal protection. This packaging:
· Complies with global customs regulations
· Prevents damage from impact, humidity, or rough transit
· Can be customized for large/special-shaped orders
You can trust your motors will arrive on time and in perfect working condition, no matter your global destination.
3. Quality Assurance & Warranty
Every motor is built to ISO 9001 standards, ensuring consistent manufacturing quality and compliance with global industrial regulations. We back our products with an 18-month warranty: if a motor is damaged by non-human factors (e.g., manufacturing defects) within this period, we replace it free of charge.
Item | Specifications | Description | Customized items |
Motor Type | Three phase AC motor (squirrel-cage type) |
|
|
Motor Standard | IEC60034 | It is a standard for rotating motors formulated by IEC. |
|
Efficiency Level | IE2 / IE3 / IE4 | It meet IE2 IE3 IE4 energy efficiency grade of IEC60034. |
|
Voltage | 110/200/220/230/240/380/400/415/440/460/480/ 660/ 690V | The motors can work well within variations of ±5% from rated voltage. | It can be customized according to the voltage in your country |
Frequency | 50/60Hz | The motors can work in 50Hz or 60Hz. | It can be customized according to the frequency in your country |
Degree of protection | IP55 | The motor has dust-proof and water-proof performance of level 5. It is suitable for industrial scenarios where there is dust (diameter ≥ 1mm) and low-pressure water spraying. | It can be customized as IP65 |
Insulation Class | F | The maximum temperature that insulating materials can withstand for a long time is 155℃. | It can be customized as H |
Operating mode | S1 | Continuous working system |
|
Cooling Method | TEFC | Totally enclosed fan cooled in accordance with IC411 of IEC60034. |
|
Site Conditions | Temperature: -15°C to +40°C Altitude: ≤ 1000 m |
| It can be customized for environments with higher or lower temperature, and over 1000 meters. |
Winding | 100% copper wire |
|
|
Motor Protection | PTC/PT100 | PTC: thermistors protection PT100: resistance thormometers protection | As option |
Output Shaft | Standard size | Cylindrical with key | The diameter and length of shaft can be customized |
Paint color | Blue / Gray |
| It can be customized |
Nameplate | Victory brand standard |
| It can be customized |
Quality Assurance | ISO 9001 Quality System | Strict quality management standard, 100% quantity inspected |
|
Warranty Period | 18 months | We offer a new motor for free if the motor is damaged due to non-human factors within 18 months. |
|
![Automated equipment]( "Automated equipment")
Efficiency and Energy Savings
Energy efficiency is one of the most critical advantages of a 1 HP 0.75 kW 3 phase motor. Compared to single-phase motors of similar output, three-phase motors deliver:
Modern designs compliant with IE3 and IE4 efficiency standards significantly reduce electricity consumption over time. For operations running motors continuously, the energy savings alone can justify upgrading to a high-efficiency three-phase motor.
Common Applications of 1 HP / 0.75 kW 3 Phase Motors
We see this motor size deployed across a wide range of industries due to its versatility and reliability.
Industrial Applications
Commercial and Infrastructure Uses
Its ability to operate continuously with minimal maintenance makes it a preferred choice for mission-critical systems.
![Induction motors]( "Induction motors")
Speed Variants and Pole Configuration
The speed of a 3 phase motor depends on its number of poles:
· 2 Pole → ~3000 RPM
· 4 Pole → ~1500 RPM
· 6 Pole → ~1000 RPM
· 8 Pole → ~750 RPM
Selecting the correct speed is essential for matching load requirements. For example, conveyors often use 4-pole or 6-pole motors, while fans and pumps may require 2-pole configurations for higher speeds.
Mounting Types and Installation Flexibility
A major advantage of the 1 HP 3 phase motor is its wide range of mounting options:
· B3 (Foot Mounted) – Standard industrial installation
· B5 (Flange Mounted) – Direct coupling to gearboxes or pumps
· B14 (Face Mounted) – Compact and space-saving layouts
This flexibility simplifies mechanical integration and reduces installation time.
Advantages of a 1 HP / 0.75 kW 3 Phase Motor
We consider the following benefits as key reasons for its widespread adoption:
· High starting torque
· Smooth and stable operation
· Lower maintenance requirements
· Long operational lifespan
· Superior thermal performance
· Excellent compatibility with VFDs
When paired with a variable frequency drive (VFD), this motor allows precise speed control and further energy optimization.
![Conveyor Belt 2]( "Conveyor Belt 2")
How to Select the Right 1 HP 3 Phase Motor
Choosing the right motor involves more than just power rating. We recommend evaluating:
· Load characteristics (constant or variable torque)
· Required operating speed
· Voltage and frequency availability
· Environmental conditions (dust, moisture, temperature)
· Duty cycle (S1 continuous or intermittent)
· Efficiency class and compliance standards
Matching these parameters ensures optimal performance and prevents premature motor failure.
Maintenance and Service Life
Proper maintenance significantly extends motor lifespan. Best practices include:
· Regular bearing lubrication
· Periodic insulation resistance testing
· Keeping cooling fins clean
· Monitoring vibration and noise levels
· Ensuring proper alignment and mounting
With correct installation and routine checks, a 1 HP 3 phase motor can operate reliably for many years with minimal downtime.
Conclusion
We consider the 1 HP / 0.75 kW 3 phase motor a cornerstone of modern industrial motion systems. Its combination of efficiency, durability, versatility, and cost-effectiveness makes it an ideal choice for a wide range of applications. Whether driving a conveyor, pump, or fan, this motor delivers dependable performance while supporting energy-saving objectives and long-term operational reliability.
Selecting the right configuration and maintaining it properly ensures maximum return on investment and consistent productivity.
