Product Overview
The Shangli YFBX4 series is a high-efficiency three-phase induction motor designed to drive industrial equipment in environments where combustible dust may be present. It uses dust ignition protection by enclosure, identified by the protection marking Ex tb IIIC T135°C Db in the product catalog.
The series covers a range of power ratings and pole configurations for different equipment requirements. Catalog outputs extend from 0.18 to 315 kW, with the available output range depending on the selected pole configuration and frame size.
Selection should take account of the electrical supply, driven load, installation arrangement and hazardous-area requirements. The supplied motor's nameplate and current certification determine its approved conditions of use.
Key Features
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Protection for combustible-dust environments: Enclosure-based dust ignition protection, with the catalog marking Ex tb IIIC T135°C Db.
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High-efficiency design: Model-specific efficiency values are provided in the technical data for comparison and motor selection.
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Multiple power and speed options: The catalog includes 2-, 4-, 6-, 8- and 10-pole models for different output and operating-speed requirements.
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Three-phase induction motor construction: Intended for industrial equipment drives requiring a motor selected for the applicable dust hazard.
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Detailed selection data: Catalog tables include rated output, current, speed, efficiency, power factor, starting characteristics and other model-specific information.
Technical Specifications
| Item | Specification |
|---|---|
| Series | YFBX4 |
| Motor type | High-efficiency three-phase induction motor |
| Intended environment | Industrial combustible-dust atmospheres, subject to application assessment |
| Protection concept | Dust ignition protection by enclosure, Ex tb |
| Catalog protection marking | Ex tb IIIC T135°C Db |
| Catalog output range | 0.18–315 kW, depending on model and pole configuration |
| Pole configurations | 2, 4, 6, 8 and 10 poles |
| Frame sizes listed | 80–355, depending on output and pole configuration |
| Catalog voltage reference | 380 V for the published rated-current data |
| Frequency basis | 50 Hz for the listed synchronous-speed groups |
| Efficiency | Model-specific; confirm the required efficiency class when ordering |
| Standards referenced in the catalog | GB/T 3836.1, GB/T 3836.31 and GB 18613-2020 |
For a different supply voltage or frequency, request confirmation of the applicable motor rating and performance data before ordering.
Power Range by Pole Configuration
| Poles | Catalog Output Range | Synchronous Speed at 50 Hz |
|---|---|---|
| 2 | 0.75–315 kW | 3,000 rpm |
| 4 | 0.55–315 kW | 1,500 rpm |
| 6 | 0.37–250 kW | 1,000 rpm |
| 8 | 0.18–200 kW | 750 rpm |
| 10 | 45–160 kW; a 185 kW specification is also listed as non-preferred | 600 rpm |
These are series ranges, not a statement that every power and frame combination is available. The catalog marks certain specifications in parentheses as non-preferred; confirm these selections before ordering. Actual rated shaft speed is lower than synchronous speed and varies by model.
Understanding the Dust-Protection Marking
The catalog identifies the YFBX4 series with the marking Ex tb IIIC T135°C Db.
| Marking | Meaning |
|---|---|
| Ex | Explosion-protection marking |
| tb | Dust ignition protection by enclosure, protection level “tb” |
| IIIC | Dust group covering conductive dust |
| T135°C | Marked maximum surface temperature of 135°C under the specified conditions |
| Db | Equipment protection level for dust atmospheres |
This dust-protection marking does not by itself establish suitability for explosive gas atmospheres or confirm ATEX or IECEx certification. Check the exact certificate, nameplate and conditions of use for the motor being supplied.
Efficiency and Performance
The catalog references energy-efficiency grades 2 and 3 under GB 18613-2020 for the dust-motor range. The required efficiency grade and any destination-market requirements should be confirmed for the selected YFBX4 model rather than inferred from the series name.
For equipment matching, review rated current, rated shaft speed, starting torque, starting current and maximum torque alongside output power. These characteristics vary across the model range and affect starting and operating performance.
Application and Selection Considerations
The YFBX4 series is intended for industrial drive applications where a combustible-dust hazard has been identified. Selection requires more than matching the motor power to the equipment.
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Confirm the hazardous-area classification, dust characteristics and required protection marking.
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Review dust ignition temperatures, possible dust-layer accumulation and the permitted motor surface temperature.
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Specify ambient temperature, altitude and installation conditions.
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Check load torque, starting requirements, duty cycle and the required operating speed.
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Confirm mounting dimensions, shaft dimensions and the required enclosure IP rating.
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If variable-speed operation is required, request a specific motor-and-drive assessment. Do not assume inverter-duty capability from the YFBX4 designation.
Request Technical Data and a Quote
Contact our Huzhou team with your equipment requirements. To help us review the application and prepare a quotation, please provide:
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Required output in kW and order quantity
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Supply voltage and frequency
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Required speed or number of poles
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Driven equipment, starting method and duty cycle
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Mounting arrangement and dimensional requirements
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Dust type and hazardous-area classification
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Required protection marking and certification
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Destination country and requested delivery date
For a replacement motor, include a clear nameplate photograph and an installation drawing if available. We can then review the electrical and mechanical requirements before confirming the selection.