YBBPX3
YBBPX3 Series High-Efficiency Flameproof Variable-Frequency Three-Phase Induction Motor
The high-efficiency flameproof variable-frequency machine, carrying both the underground mining rating and the surface industrial rating.
YBBPX3 is a totally enclosed high-efficiency flameproof variable-frequency three-phase induction motor, built to GB/T 3836.1-2021 and GB/T 3836.2-2021.
Two markings are published: Ex db I Mb for underground mining, and Ex db IIB T1 Gb to T4 Gb for surface industrial plant with a maximum surface temperature class no lower than T4. That dual coverage is the practical difference from YBBP.
Cooling is IC416, a separately driven fan, so the machine holds its cooling across the whole speed range instead of losing it as the shaft slows.
Core specifications
| Parameter | Value |
|---|---|
| Frame size | H80 – H355 mm |
| Power range | 0.18 – 315 kW |
| Explosion protection | Ex db I Mb (mining) · Ex db IIB T1 Gb – T4 Gb (industrial) |
| Voltage | 380 V · 660 V · 1140 V · 380/660 V · 660/1140 V, 50 Hz |
| Protection degree | IP55 |
| Thermal class | 155 (F), assessed to class B rise |
| Cooling | IC416 (separately driven fan) |
Standards and certification
- GB/T 3836.1-2021
- GB/T 3836.2-2021 (flameproof enclosure "d")
Typical applications
- Variable-speed hazardous-area drives in surface process plant (Ex db IIB)
- Underground mining variable-speed drives (Ex db I Mb)
- Chemical and petrochemical plant where speed control and flameproof certification are both required
Selection guide
FAQ
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