3 – 11 kV high-voltage flameproof asynchronous motor: frames 355 – 710, 185 – 2,240 kW, 2 – 12 poles; compact cast-iron frame, high protection class, easy maintenance.
YBX3 High-Voltage Ex-Proof Motor
High-voltage YBX3 motors are designed for large fan, pump, compressor and crusher drives in explosive atmospheres. Standard protection is IP55 with higher classes on request; mounting is IMB3, with IMB35 and IMV1 arrangements available.
Rated voltage is 3,000, 6,000 or 10,000 V (±5 %) at 50 Hz (±1 %) or 60 Hz; an inverter-duty (variable-frequency) version is built to customer specification. Efficiency meets grade 1 of GB 30254 for high-voltage cage induction motors.
- Ex marking — Ex d I Mb, Ex d IIB T4 Gb, Ex d IIC T4 Gb
- Environment options — indoor as standard; outdoor (W), medium / severe corrosion (F1, F2, WF1, WF2), tropical (TH, TA, THW, TAW)
Technical Specifications
| Frame size | 355 – 710 |
|---|---|
| Power range | 185 – 2,240 kW |
| Voltage / frequency | 3,000 – 11,000 V, 50 / 60 Hz |
| Number of poles | 2 – 12 |
| Thermal class / temperature rise | 155 (F) / 80 K (B), 105 K (F) |
| Vibration velocity | 2.3 mm/s |
| Efficiency | grade 1 energy efficiency (GB 30254) |
| Cooling / protection / duty | IC411 / IP55 / S1 |
| Mounting | IMB3 (IMB35, IMV1 on request) |
| Environment | −20 … +40 °C, up to 1,000 m |
