mining transformer

Detailed information about the transformer, specially designed for the mining industry.

1. Main performance parameters (precise adaptation to mine power distribution needs) (customizable)

Voltage levels: high voltage 6 kV and 10 kV (mainstream), special voltage levels such as 3 kV and 110 kV can be customized; low voltage 380 V, 660 V, 1140 V, and 127 V, adjustable according to needs.

Power range: 50 kVA - 125000 kVA, flexible selection based on actual load requirements, covering various mine power distribution scenarios.

Product type: oil-immersed (KS series), dry-type (KSG series). Oil-immersed are suitable for well-ventilated surface and underground locations, while dry-type are suitable for underground locations with high fire protection requirements and no oil contamination requirements.

Connection group label: Dyn11, Yyn0 (main set), supports on-load tap changer (OLTC) and off-load voltage regulation. The voltage regulation range can be customized.

Protection level: IP54 for outdoor use, can be upgraded to IP65 depending on installation conditions.

Cooling method: oil-immersed (ONAN, ONAF), dry-type (AN, AF), selected based on ambient temperature and load conditions.

voltage and capacity

The main high-voltage input voltages are 6 kV and 10 kV (suitable for high-voltage power distribution systems in mines), with special voltage levels such as 3 kV and 110 kV also available; the low-voltage output covers 380 V, 660 V, 1140 V, and 127 V, of which 660 V and 1140 V are suitable for large underground equipment (fans, pumps, conveyors), and 127 V is for underground lighting and small control equipment; the rated power ranges from 50 kVA to 2000 kVA, covering various mine power distribution scenarios, from small lighting power distribution to large equipment power supply, and can be flexibly selected according to actual load requirements.

Insulation class and insulation characteristics

The main products use F-type insulation (maximum allowable temperature 155℃) and H-type insulation (maximum allowable temperature 180℃). Under high temperature and humidity conditions underground, an upgrade to C-type is possible.

Overload and impact resistance

Cooling mode and temperature rise control

Oil-immersed products mainly use natural cooling (ONAN), and can optionally be equipped with forced air cooling (ONAF); dry-type products use natural air cooling (AN).

Winding material: oxygen-free copper conductor, featuring high conductivity, low resistance, high mechanical strength, heat resistance, wear resistance, and preventing deformation and burnout of the conductor due to overload, heating, and vibration friction, ensuring long-term stable operation of the winding.

Insulation material: For oil-immersed products, high-quality special mineral insulating oil used in the mining industry is adopted, featuring moisture resistance, heat resistance, and high insulation strength, enabling stable operation of the products within a temperature range of -20℃ to +40℃.

Housing/oil tank material: Cold-rolled steel, stainless steel (optional), with anti-corrosion and anti-rust surface treatment, capable of withstanding the effects of corrosive gases, moisture, and dust in underground mines, thereby extending the service life of the equipment; sealing components are made of oil-resistant and wear-resistant rubber, ensuring the sealing of oil-immersed products and preventing oil leakage.

2. Structural design and main materials (building a solid foundation for durability in harsh mining conditions)

Core Structure: Low-loss oriented silicon steel sheets are used, processed through step lamination and three-dimensional core winding, ensuring magnetic circuit uniformity, low magnetic loss, and enhancing the mechanical strength of the core.

Winding Structure: High-conductivity oxygen-free copper conductors are selected, using multi-layer segmented and staggered winding to reduce circulating current and stray losses, while improving heat dissipation efficiency and short-circuit resistance.

Core Materials: Low-loss oriented silicon steel sheets are selected, featuring high magnetic permeability, low losses, and high aging resistance, with a lower likelihood of causing core corrosion and increased magnetic loss.

3. Main Product Advantages (Precise Solutions for Mine Power Distribution Issues)

Safe and compliant production adaptable to high-risk mining scenarios.

High environmental adaptability, resistant to harsh working conditions.

High load adaptability, ensuring continuous production.

Efficient and energy-saving solution, reducing mine operating costs.

Easy installation and transportation, adapting to narrow mine spaces.

Convenient maintenance, adapting to mine operation and maintenance scenarios.

Compliant with standards and durable, guaranteed quality.

4. Typical application scenarios

Suitable for underground environments where methane, coal dust, and flammable/explosive gases are absent, as well as for underground machine rooms, pump stations, substations, etc., for power distribution. Capable of withstanding high humidity, dust, and strong vibration in underground conditions, ensuring stable power supply for underground production equipment and lighting systems. In addition to the mining industry, it can adapt to harsh conditions such as tunnel construction (subway tunnels, road tunnels), metallurgical and chemical industries (with dust, high humidity, strong vibration, and large load fluctuations), serving as a special power distribution device to ensure stable operation of various equipment.