| Item | Specification |
|---|
| Model No. | YBX3-71M1-2 0.37KW |
| Phase | Three-Phase |
| Product Type | Explosion-Proof Three-Phase Asynchronous Motor |
| Rotor Structure | Squirrel-Cage |
| Enclosure Type | Totally Closed Type |
| Poles | 2P–16P |
| Starting Method | Direct On-Line Starting (DOL) |
| Certifications | ISO9001, CCC |
| Brand | Changli |
| Rated Voltage | 220V–1140V |
| Rated Power Range | 0.18kW–630kW |
| Rated Frequency | 50Hz / 60Hz |
| Frame Size | H63–H400 |
| Duty Type | S1 Continuous Duty |
| Ambient Temperature | -15℃ ~ +40℃ |
| Relative Humidity | ≤90% (below 20℃) |
| Operating Altitude | ≤1000m |
| Connection Type | Y / Delta |
| Insulation Class | Class F |
| Protection Grade | IP55, IP56, IP65 |
| Cooling Method | IC411 |
| Rotation Direction | CW / CCW (Clockwise / Counter-Clockwise) |
| Color | Customizable |
| Terminal Position | Top side & right terminal (default), customizable |
| Packaging | Seaworthy Wooden Package |
| Trademark | CHANGLI |
| Place of Origin | China |
| HS Code | 8501510090 |
| Annual Production Capacity | 550,000 Units |
Company Profile
Changli Electric Co., Ltd., formerly Changsha Motor Factory founded in 1946, is located in Changsha, Hunan Province. It ranks among the Top 10 industrial motor manufacturers in China with long-standing industry influence.
The company has a total investment of 1.094 billion RMB, covering a production base of approximately 270,000 square meters (400 mu). Equipped with more than 600 sets of precision manufacturing equipment, it achieves an annual production capacity of 8,000 MW.
Currently, the company has over 350 employees, among whom engineering and technical personnel account for 18%. Supported by a professional R&D team and over 70 years of mature motor manufacturing experience, we develop and produce a full range of low-voltage, medium-voltage and high-voltage motors.
Our in-house testing center is officially accredited as the Hunan Quality Supervision Station for Medium and Small Motors, authorized by the National Quality Inspection Center. It undertakes professional quality supervision and sampling inspection for motor manufacturers across Central and Southern China, and is capable of testing 40 series of high and low-voltage motors.
Our diversified product portfolio covers standard motors, synchronous and asynchronous motors, high-efficiency and premium-efficiency motors, explosion-proof motors, variable-frequency speed-regulating motors, ultra-high-speed motors, submersible motors, wound-rotor slip ring motors, permanent magnet motors, large vertical circulating pump motors and special customized motors.
Product Parameter Range
- Power: 0.55 kW – 20,000 kW
- Voltage: 380 V – 13.8 kV
- Shaft Height: 80 mm – 1120 mm
Product Description
The YBX3 series low‑voltage IE3 high‑efficiency explosion‑proof three‑phase asynchronous motor is designed in accordance with both domestic and international standards. Its energy efficiency performance meets Class 3 requirements of GB18613‑2020.
This series has obtained complete authoritative certifications, including domestic explosion‑proof certificate, energy efficiency certificate and CCC certification, as well as international IECEx, ATEX and CUTR certifications. With reliable quality and global standardized performance, the motor features outstanding market competitiveness both domestically and internationally.
| Item | Specification |
|---|
| Explosion-Proof Mark | Ex d I Mb, Ex d IIB T4 Gb, Ex d IIC T4 Gb |
| European Explosion-Proof Certifications | IECEx, ATEX |
| Frame Size | H63mm – H400mm |
| Power Range | 0.18kW ~ 630kW |
| Rated Voltage | 220V ~ 1140V |
| Number of Poles | 2P ~ 16P |
| Frequency | 50Hz / 60Hz |
| Efficiency Grade | IE3 |
| Protection Class | IP55, IP56, IP65 |
| Mounting Forms | IM B3, IM B35, IM B5, IM V1 and other optional types |
| Cooling Mode | IC411 |
Our Advantages
The YBX3 series IE3 high-efficiency low-voltage explosion-proof three-phase asynchronous motor is an independently developed upgraded product. It features exquisite appearance, low energy loss, ultra-low noise, slight vibration, high safety, stable operation and easy maintenance.
Application Fields
Petroleum, oil & gas, chemical industry, metallurgy and electric power industries
Operating Conditions
This motor is suitable for hazardous locations with explosive gas atmospheres in petrochemical plants, oilfields, gas fields, metallurgical factories, power plants and underground coal mines in China and Europe. It is widely applied to drive fans, water pumps, compressors, centrifuges, mixers, conveying machinery and other general industrial equipment.
Frame
![]()
Winding
![]()
![]()
In-process Inspection & Quality Control
All testing and measuring instruments are fully calibrated annually to ensure accurate and consistent inspection results. Every production procedure undergoes strict item-by-item quality inspection and control.
| Component | Inspection Items |
|---|
| Coil | 1. Raw material physical and chemical testing2. Winding process inspection3. Winding dimension verification |
| Iron Core | 1. Silicon steel sheet material physical and chemical inspection2. Lamination burr and paint film inspection3. Laminated core dimensional check |
| Frame | 1. Welding quality conformity verification2. Finishing machining precision inspection |
| Rotor | 1. Rotor core lamination quality check2. Conducting bar welding inspection3. Material, appearance, conductivity and dimension check of bar end rings4. Slot conducting bar fastening inspection5. Core outer diameter and overall dimension check6. Dynamic balance calibration |
| Shaft | 1. Raw material quality and annealing process inspection2. Finish machining precision check |
| Stator | 1. Core compactness inspection2. Core overall length and sectional dimension check3. Winding insertion quality inspection4. Iron loss performance testing |
| Assembly | 1. Plain bearing dimension and surface quality check2. Air gap size, stator & rotor axial alignment, internal fan and windshield gap inspection3. Internal cleaning inspection4. Shaft center height and mounting dimension verification |
| Final Test | 1. Routine factory testing2. Type testing |
Factory Test & Quality Assurance
Every motor undergoes strict testing before leaving the factory. Only units that pass all test criteria are qualified for delivery, and an individual test report is provided for each motor.
| Test Category | Detailed Test Items |
|---|
| Routine Tests | 1. Three-phase DC resistance of windings2. Winding insulation resistance to earth3. Winding voltage withstand test4. No-load current test5. No-load power test6. No-load power loss test7. Three-phase no-load current unbalance test8. Locked-rotor current test9. Locked-rotor torque test10. Maximum torque test11. Rotation direction verification12. Vibration test (horizontal, vertical, axial)13. Noise test |
| Type Tests | 1. Full-load input power2. Full-load operating current3. Stator winding power loss4. Rotor winding power loss5. Core iron loss6. Mechanical power loss7. Stray power loss8. Full-load slip ratio9. Stator winding temperature rise10. Bearing operating temperature11. Winding insulation resistance after heating12. Overload performance test13. Full-load power factor14. Operational efficiency |
Packaging
Standard seaworthy package for export
Plywood package or wooden fumigation package
Suitable for long distance transportation by sea
![]()
