mining transformer
1. Safety and reliability: Fully enclosed structure, high insulation level, equipped with overload and short circuit protection, suitable for working in dusty and humid mine environments.
2. Adaptability to harsh operating conditions: impact resistance, resistance to mechanical impact, stable operation over a wide range of temperatures and humidity, ability to withstand load fluctuations and starting shocks.
3. Efficiency and energy saving: designwith low losses, excellent temperature rise control, low power consumption, long service life and minimal maintenance during long-term operation.
4. Convenient installation and transportation: Small size and light weight, voltage level and power can be adapted to the power supply needs of underground and surface mines.
Details of a transformer designed specifically for the mining industry.
1. Key performance parameters (precise adaptation to the needs of power distribution in the mine) (customizable)
Voltage levels: high voltage 6kV and 10kV (main stream), special voltage levels such as 3kV and 110kV can be customized; low voltage 380V, 660V, 1140V and 127V, adjustable according to needs.
Power range: 50kVA-125000kVA, flexible selection according to actual load needs, covering various mine power distribution scenarios.
Product type: oil-immersed (KS series), dry (KS series). Oil-immersed units are suitable for well-ventilated above- and below-ground spaces, while dry units are suitable for underground spaces with high fire protection requirements and no oil contamination requirements.
Connection group label: Dyn11, Yyn0 (main set), supports both on-load (OLTC) and off-load voltage regulation. The voltage regulation range is configurable.
Protection class: for outdoor use - IP54, depending on installation conditions can be increased to IP65.
Cooling method: oil (ONAN, ONAF), dry (AN, AF), selected depending on the ambient temperature and load conditions.
voltage and capacitance
The main high-voltage input voltage is 6kV and 10kV (suitable for high-voltage power distribution systems in mines), and special voltage levels such as 3kV and 110kV are also available; the low-voltage output voltage covers 380V, 660V, 1140V and 127V, of which 660V and 1140V are suitable for large underground equipment (fans, pumps, conveyors), and 127V is for underground lighting and small control equipment; the rated power ranges from 50kVA to 2000kVA, covering various mine power distribution scenarios, from small lighting power distribution to large equipment power supply, and can be flexibly selected according to the actual load requirements.
Insulation class and insulation characteristics
The basic products use F-type insulation (maximum allowable temperature 155℃) and H-type insulation (maximum allowable temperature 180℃). For high-temperature and high-humidity underground applications, an upgrade to C-type insulation is possible.
Resistance to overloads and shocks
Cooling mode and temperature rise control
Oil-cooled products mainly use natural cooling (ONAN), and can also be optionally equipped with forced air cooling (ONAF); dry-type products use natural air cooling (AN).
Winding material: oxygen-free copper conductor, which has high conductivity, low resistance, high mechanical strength, heat resistance, wear resistance, and also prevents deformation and burnout of the conductor due to overload, heating and friction during vibration, which ensures long-term stable operation of the winding.
Insulation material: For products immersed in oil, high-quality special mineral insulating oil used in the mining industry is used. It has characteristics such as moisture resistance, heat resistance and high insulating strength, allowing stable operation of products in the temperature range from -20℃ to +40℃.
The housing/oil tank material is 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, which prolongs the service life of the equipment; the sealing elements are made of oil-resistant and wear-resistant rubber, ensuring the tightness of products immersed in oil and preventing oil leakage.
2. Structural design and basic materials (creating a strong foundation for durability in the harsh mining environment)
Core design: Using low-loss oriented silicon steel sheets processed by step lamination and three-dimensional core winding, it ensures the uniformity of the magnetic circuit, low magnetic loss and improves the mechanical strength of the core.
Winding structure: Selecting high conductivity oxygen-free copper conductors, using multilayer segmented and staggered winding to reduce circulating current and dissipation loss, and improve heat dissipation efficiency and short-circuit resistance.
Core Materials: Selection of low-loss oriented silicon steel sheets, which have high magnetic permeability, low loss and high aging resistance, and are less likely to cause core corrosion and increase magnetic loss.
3. Key product advantages (precise solution to power distribution problems in mines)
Safe and compliant production adapting to high-risk mine scenarios.
High adaptability to the environment, resistance to harsh working conditions.
High load adaptability ensures continuous production.
An efficient and energy-saving solution that reduces mine operating costs.
Convenient installation and transportation, adapt to narrow mine spaces.
Convenient maintenance, adaptation to mine operation and maintenance scenarios.
It complies with standards and is distinguished by its durability and guaranteed quality.
4. Typical application scenarios
Suitable for underground environments free of methane, coal dust, and flammable/explosive gases, as well as for underground power distribution in machine rooms, pumping stations, substations, and other environments. It can withstand high humidity, dust, and strong vibration in underground environments, ensuring a stable power supply for underground production equipment and lighting systems. In addition to mining, it can adapt to harsh environments such as tunnel construction (subway tunnels, highway tunnels), metallurgy, and chemical industries (with dust, high humidity, strong vibration, and large load fluctuations), serving as a specialized power distribution device to ensure the stable operation of various equipment.
