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- Suitable for oil-immersed mine power transformers with capacities up to 1250 kVA and voltages up to 10 kV. This is a standard oil-immersed transformer without explosion-proof requirements, primarily serving as a power source for mine lighting or electric drive systems during distribution.
- Proven high reliability through operation in over 50 countries and regions worldwide; key markets include Iran, Kazakhstan, Uzbekistan, Pakistan, Indonesia, and Chile.
- Standards compliance: IEC 60076, GB 1094.1–2-1996, GB 1094.3,5-2003, GB/T 6451-2008, and GB 12173-2008.
Product Description
Product Features
- The mining transformer utilizes stacked, high-permeability grain-oriented silicon steel sheets. It features a core-type design with fully mitered, stacked joints. The core limbs have a stepped circular cross-section, ensuring low noise and low losses, while the tank structure is robust.
- High- and low-voltage cable connection boxes are welded to the sides of the tank for cable termination. The high-voltage winding includes taps for ±5% rated voltage adjustment; the power supply must be disconnected before operating the tap changer to adjust the voltage.
- The low-voltage side supports either a "Y" connection (693V) or a "D" connection (400V). Secondary terminals are routed to six bushings within the cable connection box, allowing users to reconfigure the connection. Lifting lugs welded to the tank walls facilitate hoisting. The tank base is equipped with skids featuring mounting holes, allowing for the installation of mine car wheels if required for underground transport.
Operating Environment
1. Altitude not exceeding 1,000 meters above sea level (special environments require separate specifications);
2. Ambient temperature:
Maximum air temperature: +40°C; Maximum daily average temperature: +25°C;
Maximum annual average temperature: +20°C; Minimum outdoor temperature: -20°C.
3. Relative humidity of surrounding air: ≤95% (at +25°C);
4. Installation location: Underground mine sites containing coal dust and methane (firedamp) but free from explosion hazards;
5. Power supply voltage waveform: Approximately sinusoidal;
FAQ
Q1: What are Mining Explosion-Proof Transformers mainly used for?
A: They are widely used in underground coal mines, mining operations, tunnels, and hazardous areas with explosive gas or dust.
Q2: What explosion-proof features does the transformer have?
A: The transformer adopts a robust explosion-proof enclosure with excellent sealing performance, preventing internal electrical sparks from igniting the surrounding hazardous atmosphere.
Q3: What capacity options are available?
A: Standard capacities include 50kVA, 100kVA, 200kVA, 315kVA, 500kVA, 800kVA, and 1000kVA. Custom capacities are also available.
Q4: What voltage ratings are supported?
A: The high-voltage side typically supports 6kV and 10kV, while the low-voltage side can be customized to 380V, 660V, 1140V, and other required voltages.
Q5: What cooling method is used?
A: The transformer normally adopts ONAN (Oil Natural Air Natural) cooling, providing reliable heat dissipation for continuous operation.
Q6: Can the transformer be customized?
A: Yes. Capacity, voltage, vector group, protection level, and installation configuration can all be customized according to customer requirements.
Q7: What are the main advantages of this product?
A: It offers reliable explosion protection, stable performance, low loss, low noise, high mechanical strength, easy maintenance, and long service life.
Q8: Which standards does the product comply with?
A: The transformer is designed and manufactured in accordance with mining explosion-proof standards and can also comply with IEC and other international standards upon request.
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- Suitable for oil-immersed mine power transformers with capacities up to 1250 kVA and voltages up to 10 kV. This is a standard oil-immersed transformer without explosion-proof requirements, primarily serving as a power source for mine lighting or electric drive systems during distribution.
- Proven high reliability through operation in over 50 countries and regions worldwide; key markets include Iran, Kazakhstan, Uzbekistan, Pakistan, Indonesia, and Chile.
- Standards compliance: IEC 60076, GB 1094.1–2-1996, GB 1094.3,5-2003, GB/T 6451-2008, and GB 12173-2008.Learn More
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