YBX5-355L is the 355L frame size (shaft height H = 355 mm) of the Shangli YBX5 series of ultra-premium efficiency flameproof three-phase induction motors. It covers 185–315 kW in 2 / 4 / 6 / 8-pole versions, with Ex marking Ex d I Mb / Ex d IIB T4 Gb / Ex d IIC T4 Gb and efficiency to China GB 18613-2020 grade 1 (IE5). The tables below list performance data, mounting dimensions and outline drawings for all 8 standard models on this frame.
- Series
- YBX5 Series Ultra-Premium Efficiency Flameproof Three-Phase Induction Motors
- Frame size / shaft height
- 355L / H = 355 mm
- Output range
- 185–315 kW
- Poles
- 2 / 4 / 6 / 8
- Ex marking
- Ex d I Mb / Ex d IIB T4 Gb / Ex d IIC T4 Gb
- Rated voltage
- 380 V; at other voltages current I = IN × 380 / U
- Rated frequency
- 50 Hz (60 Hz available)
- Cooling
- IC411
- Efficiency
- China GB 18613-2020 efficiency grade 1 (IE5)
- Mounting
- IMB3, IMB5, IMB35, IMV1, IMB14, IMB34 and others
Performance data
| Model | Output kW | Output HP | Poles | Speed r/min | Current A (380 V) | Torque N·m | Efficiency % | Power factor cosφ | Locked-rotor torque / rated torque | Locked-rotor current / rated current | Breakdown torque / rated torque | Noise LpA dB(A) | Weight kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| YBX5-355L1-2 | 280 | 375.5 | 2 | 2980 | 503.1 | 897.3 | 97.2 | 0.87 | 1.8 | 8.5 | 2.2 | 85 | 2436 |
| YBX5-355L2-2 | 315 | 422.4 | 2 | 2980 | 566.0 | 1009.5 | 97.2 | 0.87 | 1.8 | 8.5 | 2.2 | 85 | 2604 |
| YBX5-355L1-4 | 280 | 375.5 | 4 | 1488 | 490.8 | 1797.0 | 97.4 | 0.89 | 2.0 | 8.5 | 2.2 | 82 | 2373 |
| YBX5-355L2-4 | 315 | 422.4 | 4 | 1488 | 552.1 | 2021.7 | 97.4 | 0.89 | 2.0 | 8.5 | 2.2 | 82 | 2394 |
| YBX5-355L1-6 | 220 | 295 | 6 | 985 | 400.7 | 2133.0 | 97 | 0.86 | 1.9 | 8 | 2.0 | 79 | 2363 |
| YBX5-355L2-6 | 250 | 335.3 | 6 | 985 | 455.3 | 2423.9 | 97 | 0.86 | 1.9 | 8 | 2.0 | 79 | 2394 |
| YBX5-355L1-8 | 185 | 248.1 | 8 | 740 | 356.0 | 2387.5 | 96.3 | 0.82 | 1.8 | 7.8 | 2.0 | 77 | 2310 |
| YBX5-355L2-8 | 200 | 268.2 | 8 | 740 | 384.8 | 2581.1 | 96.3 | 0.82 | 1.8 | 7.8 | 2.0 | 77 | 2415 |
Values at 380 V, 50 Hz; efficiency applies at 75–100% load and noise is the no-load sound pressure level. At voltages other than 380 V, current I = IN × 380 / U and other values are unchanged. For 60 Hz motors, add 6 dB(A) to the no-load noise of 2-pole frames 200–355 and 5 dB(A) for other pole numbers. Final values are those in the routine test report.
Mounting dimensions (mm)
| Applies to | A | B | C | H | K | D | E | F | G |
|---|---|---|---|---|---|---|---|---|---|
| 2-pole | 610 | 630 | 254 | 355 | 28 | 75 | 140 | 20 | 67.5 |
| 4-pole and above | 610 | 630 | 254 | 355 | 28 | 95 | 170 | 25 | 86 |
| Flange | M | N | P | R | α | Holes × dia. | T |
|---|---|---|---|---|---|---|---|
| FF740 | 740 | 680 | 800 | 0 | 22.5° | 8×Φ24 | 6.0 |
| AA | AB | AC | AD | BB | HA | HD | HE | LA |
|---|---|---|---|---|---|---|---|---|
| 120 | 730 | 710 | 350 | 700 | 52 | 1080 | 1145 | 25 |
| Applies to | IMB3 / IMB5 / IMB35 etc. | IMV1 |
|---|---|---|
| 2-pole | 1615 | 1685 |
| 4-pole and above | 1645 | 1715 |
| Single entry | Double entry |
|---|---|
| — | M64×2 |
YBX3, YBX4 and YBX5 motors of the same frame size share the same mounting dimensions. Source: Shangli general motor catalogue. HE is the overall height of flange-mounted versions; overall length L varies slightly with terminal box and mounting arrangement and is confirmed on the approval drawing.
Outline drawings
Selection notes
- Choose the Ex marking for the site: Ex d I Mb for underground coal mines with firedamp (methane); Ex d IIB T4 Gb for IIB gases such as ethylene in surface industry; Ex d IIC T4 Gb where hydrogen, acetylene or other IIC gases are present. Suitable for Zone 1 and Zone 2 explosive gas atmospheres.
- The standard version is for indoor use. For indoor medium / strong anti-corrosion (F1 / F2), outdoor medium / strong anti-corrosion (WF1 / WF2), humid tropical (TH) or high-altitude (G) conditions, the code is added to the model, e.g. YBX5-160L-2 WF1; please state this in your enquiry.
- Values are for 380 V, 50 Hz. At other voltages the rated current is I = IN × 380 / U. Please state 60 Hz or other voltages in the selection form.
- YBX5 reaches China GB 18613-2020 efficiency grade 1 (IE5), one grade above YBX4, and suits pumps, fans and compressors running long hours where energy cost matters.
Frequently asked questions
Can the YBX5-355L replace a YBX3 or YBX4 motor on the same frame?
Yes, for mounting. YBX3, YBX4 and YBX5 motors of the same frame size share the same mounting dimensions. The 355L frame has a shaft height of 355 mm; see the dimension tables above. Check the output, poles and Ex marking when replacing.
What is the difference between YBX5 and YBX4?
They have the same mounting dimensions. YBX5 reaches China GB 18613-2020 efficiency grade 1 (IE5) and YBX4 grade 2, so YBX5 is more efficient at the same output and saves energy in continuous duty.
What is the Ex marking of the
Ex d I Mb / Ex d IIB T4 Gb / Ex d IIC T4 Gb. Use Ex d I Mb for underground coal mines; in surface industry choose IIB or IIC for the gas group at site.
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, mounting arrangement and file format required (DWG, STEP or PDF). Our sales team will send the drawings, certificate documents and a quotation.