1. Model Meaning
- K: Mining
- B: Flameproof Type (Ex d I Mb)
- S: Three-phase
- G: Dry-type (non-oil-immersed)
- Z: Combined
- Y: Mobile
- Example: KBSGZY-1250/10
- 1250: Rated capacity 1250 kVA
- 10: High-voltage side 10 kV
2. Electrical Parameters (Mainstream Specifications)
- Rated capacity: 50 ~ 3150 kVA
- High-voltage rating: 6 kV / 10 kV
- Low-voltage rating: 1140 V / 690 V / 400 V
- Frequency: 50 Hz
- Phase number: 3-phase
- Cooling method: Dry-type natural cooling (AN/AN)
- Insulation class: Class H (heat resistance up to 180℃)
- Protection class: IP54 (dustproof, splash-proof)
- Short-circuit impedance: 4% ~ 6%
- Connection group: Yyn0 / Dyn11
3. Environment & Structure
- Altitude: Standard ≤ 1000 m; customized for high altitude (Qinghai/Tibet) with capacity derating and enhanced insulation
- Ambient temperature: -20℃ ~ +40℃ (cold-resistant type required for high-altitude areas)
- Inclination: ≤ 15°
- Dimensions: L 4–5 m × W 1.2–1.4 m × H 1.6–1.8 m
- Weight: 3–12 tons (varies with capacity)
4. Standard Safety Protections
- Short-circuit, overload, earth leakage, earth leakage lockout
- Over-voltage, under-voltage, over-temperature protection
- Electrical interlock for high and low voltage switches, power-off interlock when opening the cover
