| Item | Specification |
|---|
| Model No. | YFB3 / YFB4 |
| Phase | Three-phase |
| Product Type | Explosion-proof three-phase motor |
| Rotor Structure | Squirrel cage |
| Enclosure Type | Totally enclosed |
| Pole Range | 2 – 30 poles |
| Starting Method | Direct-on-line (DOL) starting |
| Certifications | ISO9001, CCC |
| Brand | Changli |
| Rated Voltage | 380V / 400V |
| Rated Current | 3.2A |
| Mounting Type | IM B3 |
| Rated Power Range | 0.12 ~ 630 kW |
| Rated Frequency | 50Hz / 60Hz |
| Frame Size Range | H63mm – H400mm |
| Insulation Class | Class F |
| Ingress Protection | IP55 |
| Shipping Package | Export seaworthy packing |
| Trademark | CHANGLI |
| Place of Origin | China |
| HS Code | 8501510090 |
| Annual Production Capacity | 550,000 units |
Product Description
The YBX4 series low-voltage IE4 high-efficiency explosion-proof three-phase asynchronous motor, with its non-explosion counterpart YE4, complies with global standards including GB755, IEC60034 for rotating machines, as well as GB3836 and IEC 60079 for explosion-proof electrical equipment.
Its power ratings and mounting dimensions fully conform to IEC standards and align with Germany DIN42673 specifications. The energy efficiency reaches Grade 2 as specified in national standard GB18613-2020.
| Parameter | Specification |
|---|
| Frame Size | H80 – H355 |
| Power Range | 0.18 kW – 315 kW |
| Rated Voltage | 220 V – 1140 V |
| Number of Poles | 2 – 8 poles |
| Frequency | 50 Hz / 60 Hz |
| Ingress Protection Grade | IP55, IP56, IP65, IP66 |
| Mounting Types | IM B3, IM B35, IM B5, IM V1 and other optional types |
| Explosion-Proof Mark | Ex d IIB T4 Gb, Ex d IIC T4 Gb or non-explosion-proof |
| Cooling Mode | IC411 |
Product Features
This motor series boasts fine workmanship, superior performance and stable reliable operation, ranking at the domestic leading level.
Applicable Industries
Petroleum, metallurgy, chemical, power and machinery industries
Working Conditions
Suitable for hazardous locations containing explosive gas atmospheres in petrochemical, petroleum, mining, chemical, metallurgical and power sectors.
It widely drives general equipment including fans, water pumps, compressors, feed pumps, crushers, winches, centrifuges, cutting machine tools and conveying machinery.
Main Raw Materials
- Frame: Cast iron / steel
- Stator: Copper winding
- Rotor: Copper or aluminum
- Motor Shaft: ASTM1045 carbon steel
- Bearings: SKF or equivalent high-quality domestic brands
Frame
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Winding
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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 |
Quality Guarantee
Every motor undergoes strict factory testing before shipment. Only fully qualified products are delivered, and an independent test report is provided for each unit.
| Classification | Test Items |
|---|
| Routine Tests | 1. Three-phase DC winding resistance2. Winding insulation resistance to ground3. Winding voltage withstand test4. No-load current5. No-load power6. No-load loss7. Three-phase no-load current unbalance8. Locked-rotor current9. Locked-rotor torque10. Maximum torque11. Rotation direction verification12. Vibration test (horizontal, vertical, axial)13. Noise test |
| Type Tests | 1. Full-load input power2. Full-load current3. Stator winding loss4. Rotor winding loss5. Iron loss6. Mechanical loss7. Stray loss8. Full-load slip ratio9. Stator winding temperature rise10. Bearing temperature11. Winding insulation resistance after temperature rise test12. Overload test13. Full-load power factor14. Efficiency |
Painting, Packaging & Warranty
Painting
The standard coating thickness is 120 microns (40 μm primer + 80 μm topcoat). Supported by professionally certified painters, we provide customized color mixing and painting services according to customer requirements.
Packaging
Adopts standard export seaworthy packaging, including plywood cases and fumigated wooden boxes. The package is specially designed and reinforced to adapt to long-distance ocean transportation.
Warranty Period
Standard warranty term: 12 months after commissioning or 18 months after delivery, whichever comes first. Extended warranty service is available upon request. Please contact us for detailed information.
