GNAN mining transformer
Nitrogen-filled transformer is an oil-immersed transformer where the space above the insulating oil is filled with nitrogen gas instead of air. This design helps maintain the quality of the insulating oil by preventing oxidation and moisture absorption, which can degrade the oil over time and reduce the transformer's performance and lifespan. Here are some key aspects of nitrogen-filled transformers:
Nitrogen filled transformer
It is suitable for methane gas and coal dust and other explosive danger in the mine.
Varelen Power Nitrogen Cooled Dry Type Transformers are designed to provide power delivery solutions in an underground environment where safety is of the highest importance.
Technical specifications
1) Rated power: 500kva
2) Number of phases: 3
3) Insulation: VPI
4) Primary voltage: 1000V (tapping:+3*5%)
5) Secondary voltage: 1000V
6) Frequency: 50Hz
7) Vector group: Dyn11
8) Copper windings
9) GNAN (include shell)
10) Primary: Delta Connected Winding
11) Secondary: Star Connected Winding
Including the earth screen shield.
the benefit of nitrogen filled transformer
1. Prevention of Oxidation
- Nitrogen acts as a protective barrier: By filling the transformer tank with nitrogen, the oil is shielded from oxygen in the atmosphere. This prevents the oil from oxidizing, which can cause the formation of sludge, acid, and other byproducts that reduce the insulating properties of the oil and the efficiency of the transformer.
2. Moisture Protection
- Reduction of moisture content: The nitrogen blanket helps to minimize the ingress of moisture, which can negatively impact the oil’s dielectric strength and increase the risk of electrical failures. Moisture can cause partial discharges and even short circuits, especially in high-voltage systems.
3. Pressure Regulation
- Pressure relief through nitrogen: Nitrogen-filled transformers are often equipped with a pressure relief valve. When internal pressure builds up due to temperature changes or gas formation, the nitrogen gas can be released, maintaining safe operating pressure levels and preventing damage to the transformer tank.
4. Increased Reliability and Longevity
- Extended transformer life: With reduced oxidation and moisture-related degradation, nitrogen-filled transformers generally have a longer service life. They require less frequent maintenance and oil replacement, which can lead to cost savings over time.
5. Hermetic Sealing
- Sealed design: Many nitrogen-filled transformers are hermetically sealed, ensuring that no external air enters the tank. This enhances the overall reliability of the transformer, especially in humid or coastal environments where moisture intrusion can be a significant issue.
6. Applications
- Industrial and utility use: Nitrogen-filled transformers are commonly used in industrial settings, utilities, and renewable energy systems. They are especially beneficial in environments where consistent performance and low maintenance are critical.
Nitrogen-filled transformers provide an efficient and reliable solution for maintaining the quality of the insulating oil, thus ensuring stable performance and extended operational life. They are particularly advantageous in environments that demand consistent transformer operation with minimal maintenance.
