High starting torque for ball mills, compressors and heavy-start loads.

| Frame | H355–630 |
| Power | 200–2500 kW |
| Start torque | High (≥2.0×) |
| Protection | IP23/IP44 |
| Cooling | IC01/IC611 |
YQ large squirrel-cage motors with high starting torque for ball mills, crushers and compressors; frame H355–630.