YFBBP3-225S is the 225S frame size (shaft height H = 225 mm) of the Shangli YFBBP3 series of dust ignition-proof variable-frequency three-phase induction motors. It covers 18.5–37 kW in 4 / 8-pole versions with Ex marking Ex tD A21 IP65 T135°C / Ex tD A22 IP55 T135°C, for operation on a VFD with constant torque at (3)5–50 Hz and constant power at 50–100 / 50–60 Hz, cooled by an independent axial-flow fan. The tables below list performance data and mounting dimensions for all 2 standard models on this frame. The catalogue writes the models as YFBBP3225S-4, YFBBP3225S-8.
- Series
- YFBBP3 Series Dust Ignition-Proof Variable-Frequency Three-Phase Induction Motors
- Frame size / shaft height
- 225S / H = 225 mm
- Output range
- 18.5–37 kW
- Poles
- 4 / 8
- Ex marking
- Ex tD A21 IP65 T135°C / Ex tD A22 IP55 T135°C
- Rated voltage
- 380 V
- Constant-torque range
- (3)5–50 Hz
- Constant-power range
- 50–100 / 50–60 Hz
- Cooling
- Independent axial-flow fan for the same cooling at any speed
- Drive
- Works with general-purpose VFDs from Chinese and international brands
Performance data
| Model | Output kW | Output HP | Poles | Speed r/min | Current A (380 V) | Rated torque N·m | Efficiency % | Power factor cosφ | Noise LwA dB(A) | Constant-torque range Hz | Constant-power range Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|
| YFBBP3-225S-4 | 37 | 49.6 | 4 | 1475 | 69.9 | 235.5 | 92.5 | 0.87 | 88 | (3)5–50 | 50–100 |
| YFBBP3-225S-8 | 18.5 | 24.8 | 8 | 730 | 40.0 | 235.5 | 90.0 | 0.78 | 86 | (3)5–50 | 50–60 |
Rated values at 380 V, 50 Hz. A constant-torque range of (3)5–50 Hz means 5–50 Hz as standard and down to 3 Hz on request; the constant-power range is the speed range above 50 Hz. Rated torque is as given in the catalogue. Final values are those in the routine test report.
Mounting dimensions (mm)
| Applies to | A | B | C | H | K | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| 4-pole and above | 356 | 286 | 149 | 225 | 18.5 | 60 | 140 | 18 | 53 |
| Flange | M | N | P | R | α | Holes × dia. | T |
|---|---|---|---|---|---|---|---|
| FF400 | 400 | 350 | 450 | 0 | 22.5° | 8×Φ18.5 | 5.0 |
Feet, shaft extension and flange dimensions are listed as for YBBP variable-frequency motors of the same frame size, for preliminary selection. The YFBBP3 has an independent axial-flow fan at the non-drive end and a dust ignition-proof terminal box, so overall length L and height are confirmed on the approval drawing.
Outline drawing
Selection notes
- Below 50 Hz the motor runs at constant torque: rated torque is available from (3)5 to 50 Hz, suitable for conveyors, extruders, mixers and hoisting equipment.
- Above 50 Hz the motor runs at constant power: the range for this frame is 50–100 / 50–60 Hz and available torque falls as speed rises, suitable for high-speed fans and centrifuges.
- An independent axial-flow fan keeps cooling constant at low speed; the fan needs its own power supply, so allow for it in the electrical design.
- Ex tD A21 IP65 T135°C is for Zone 21 (combustible dust cloud likely in normal operation) and Ex tD A22 IP55 T135°C for Zone 22; the surface temperature does not exceed 135°C. For combustible dust atmospheres only, not explosive gas. The VFD is normally installed in a safe area; please give the dust type, zone, drive brand, cable length and speed range in your enquiry.
Frequently asked questions
Can a standard dust ignition-proof motor run on a VFD? Why choose the
A standard dust ignition-proof motor is cooled by its own shaft fan, so airflow drops at low speed and temperature rises, with a risk of exceeding the surface temperature limit in long low-frequency operation. The YFBBP3 has an independent axial-flow fan that keeps cooling at rated torque even at 5 Hz, which makes it the better choice for continuous variable-speed duty.
What is the speed range of the
Constant torque from (3)5 to 50 Hz and constant power at 50–100 / 50–60 Hz; rated frequency 50 Hz.
How can I get CAD drawings and the Ex certificate for the
Complete the selection form at the bottom of this page with the model, Ex marking, speed range, VFD brand and file format required (DWG, STEP or PDF). Our sales team will send the drawings, certificate documents and a quotation.