YPT3-355L is the 355L frame size (shaft height H = 355 mm) of the Shangli YPT3 series of variable-frequency three-phase induction motors. It covers 185–355 kW in 2 / 4 / 6 / 8-pole versions, rated 380 V, 50 Hz, for VFD operation with constant torque at 5–50 Hz and constant power at 50–60 / 50–100 Hz, IP55, with an independent cooling fan (IC416). The tables below list performance data and mounting and overall dimensions for all 8 standard models on this frame.
- Series
- YPT3 Series Variable-Frequency Three-Phase Induction Motors
- Frame size / shaft height
- 355L / H = 355 mm
- Output range
- 185–355 kW
- Poles
- 2 / 4 / 6 / 8
- Rated voltage
- 380 V
- Rated frequency
- 50 Hz
- Constant torque
- 5–50 Hz
- Constant power
- 50–60 / 50–100 Hz
- Enclosure
- IP55
- Cooling
- IC416 (independent cooling fan)
Performance data
| Model | Output kW | Output HP | Poles | Current A (380 V) | Efficiency % | Rated torque N·m | Constant torque Hz | Constant power Hz | Weight kg |
|---|---|---|---|---|---|---|---|---|---|
| YPT3-355L-2 | 315 | 422.4 | 2 | 545.0 | 95.4 | 1009 | 5–50 | 50–60 | 2500 |
| YPT3-355L-4 | 280 | 375.5 | 4 | 496.5 | 95.2 | 1783 | 5–50 | 50–100 | 1918 |
| YPT3-355L1-4 | 315 | 422.4 | 4 | 558.6 | 95.2 | 2019 | 5–50 | 50–100 | 1775 |
| YPT3-355L2-4 | 355 | 476.1 | 4 | 629.5 | 95.2 | 2260 | 5–50 | 50–100 | 2275 |
| YPT3-355L1-6 | 220 | 295 | 6 | 402.7 | 94.5 | 2101 | 5–50 | 50–100 | 1700 |
| YPT3-355L3-6 | 250 | 335.3 | 6 | 456.4 | 94.5 | 2412 | 5–50 | 50–100 | 1800 |
| YPT3-355L2-8 | 185 | 248.1 | 8 | 363.1 | 94.4 | 2356 | 5–50 | 50–100 | 1600 |
| YPT3-355L3-8 | 200 | 268.2 | 8 | 387.4 | 94.5 | 2581 | 5–50 | 50–100 | 1680 |
Catalogue values at the 380 V, 50 Hz rating point. Constant torque from 5 to 50 Hz and constant power above 50 Hz (50–60 Hz for 2-pole, 50–100 Hz for 4-pole and above). The rated voltage and frequency can also be set to customer requirements. Final values are those in the routine test report.
Mounting and overall 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 |
| M | N | P | R | Holes × dia. | T |
|---|---|---|---|---|---|
| 740 | 680 | 800 | 0 | 8×Φ24 | 6 |
| Applies to | AB | AC | AD | HD | HF | L |
|---|---|---|---|---|---|---|
| 2-pole | 730 | 710 | 665 | 1010 | — | 1510 |
| 4-pole and above | 730 | 710 | 665 | 1010 | — | 1550 |
Source: Shangli catalogue, YPT3 mounting and overall dimension table; mounting dimensions follow IEC standards and match YE3 motors of the same frame. YPT3 motors carry an independent cooling fan at the non-drive end, so overall dimensions are confirmed on the approval drawing. HF is the overall height in the B5 arrangement; B5 is not available for frames 315 and above.
Outline drawing
Selection notes
- From 5 to 50 Hz the motor runs at constant torque and delivers rated torque even at low speed, suitable for conveyors, extruders, mixers and hoisting equipment. Above 50 Hz it runs at constant power and available torque falls as speed rises.
- YPT3 motors use a special insulation system for VFD supply and an independent fan (IC416), so cooling does not depend on motor speed. The fan needs its own supply; allow for it in the electrical design.
- Standard rating is 380 V, 50 Hz; the rated voltage and frequency can be set to your requirements. Please state this in the selection form.
- Mounting dimensions follow IEC and DIN standards and match YE3 motors of the same frame, so a standard motor can be replaced to convert a drive to variable speed.
Frequently asked questions
Can a standard motor run on a VFD? Why choose the
A standard motor is cooled by its shaft fan, so airflow drops at low speed and temperature rises, and its insulation is not designed for the voltage peaks of a VFD output. Long variable-speed operation risks overheating and insulation damage. YPT3 motors have inverter-grade insulation and an independent cooling fan for continuous variable-speed duty.
What is the speed range of the
Constant torque from 5 to 50 Hz and constant power at 50–60 / 50–100 Hz; rated frequency 50 Hz.
How can I get CAD drawings and a quotation for the
Complete the selection form at the bottom of this page with the model, quantity, speed range, VFD brand, mounting arrangement and file format required (DWG, STEP or PDF). Our sales team will send the drawings together with a quotation.