New-generation high-efficiency high-voltage motor with a welded steel-plate frame: H355 – H1120 frames, 185 – 31,500 kW, 6 / 10 kV, 2 – 18 poles.
Box-Type Three-Phase Asynchronous Motor (YXKK)
The box-type motor replaces the traditional cast-iron frame with a welded steel-plate construction: stiffer and lighter, it lowers vibration and noise. Heavy-duty bearings come with a non-stop oil injection and drainage system; PT100 sensors on stator and bearings and a 220 V AC anti-condensation heater are standard.
The electromagnetic design uses higher-grade insulation with VPI treatment and a high-precision cast-aluminium or copper-bar rotor. A 1,000 kW motor running 16 hours a day saves tens of thousands of kWh a year over the previous generation, which is why the series is chosen for continuously running sites such as power stations and large chemical plants.
- Applications — fan, pump, compressor and conveyor drives; heavy-duty industrial loads
- Standards — IEC and GB compliant; class F insulation operated at class B temperature rise
- Monitoring — PT100 on stator and bearings; anti-condensation heater (220 V AC)
Technical Specifications
| Frame size | H355 – H1120 |
|---|---|
| Number of poles | 2 – 18 |
| Rated power | 185 – 31,500 kW |
| Rated voltage | 6,000 V, 10,000 V (3 kV and others on request) |
| Frequency | 50 Hz |
| Mounting | IMB3 |
| Thermal class | 155 (F) |
| Temperature rise limit | 80 K / 105 K |
| Tolerance — Voltage fluctuation | ±5 % |
| Tolerance — Frequency fluctuation | ±2 % |
| Tolerance — Efficiency | −0.10 × (1 − η) |
| Tolerance — Power factor | −(1 − cos φ) / 6; absolute value min. 0.02, max. 0.07 |
| Tolerance — Locked-rotor torque ratio | rated value −15 % (+25 % by agreement with buyer) |
| Tolerance — Maximum torque ratio | rated value −10 % |
| Tolerance — Locked-rotor current ratio | rated value +20 % |
