China Suppliers Factory: Advanced 35kV Oil-Immersed On-Load Tap Changing Power Transformer for Stable Grid Performance
Product Parameter
| Parameter | Specification |
|---|---|
| Rated Capacity | 3150kVA – 31500kVA |
| High Voltage | 33kV |
| Low Voltage | 6.3kV / 6.6kV / 10.5kV / 11kV |
| Frequency | 50Hz |
| Tap Range | ±5% or ±2×2.5% |
| Connection Group | Yd11 / YNd11 |
| Cooling Method | ONAN / ONAF (optional) |
| Insulation Class | Class F / Class H |
| No-Load Loss | 2600W – 17400W |
| Load Loss (75℃) | 23500W – 110200W |
| Impedance Voltage | 7% – 10% |
| Regulation Method | On-load Tap Changer (OLTC) |
| Insulation Level | LI 75kV / AC 35kV |
Product Applications
Urban Utility Grid
Ideal for urban substations requiring stable ±5% voltage control and high-demand infrastructure support up to 31,500kVA.
Heavy Industrial
Handles load variations up to 120%, ensuring stable operation for mining, metallurgy, and large manufacturing plants.
Renewable Energy
Optimized for solar and wind farms, providing dynamic voltage adaptation for efficient grid synchronization.
Product Advantages
Efficient Energy Performance
Reduces energy consumption and improves long-term operating efficiency.
Reliable Finished Structure
Compact and durable design ensures stable operation in harsh environments.
Sealed Tank Protection
Minimizes external contamination and significantly extends service life.
Stable Insulation Performance
Advanced processing improves insulation reliability and operational safety.
Reinforced Mechanical Design
Strong structural assembly enhances transportation safety and stability.
Flexible Capacity Options
Multiple configurations available for diverse distribution requirements.
Key Benefits
The 35kV oil-immersed OLTC power transformer is a high-performance solution for medium-voltage distribution systems requiring continuous voltage regulation and reliable energy transmission. Its combination of on-load tap changing technology, large capacity range, and high efficiency makes it suitable for utility networks, industrial facilities, and renewable energy projects.
With excellent stability, strong overload capacity, and long service life, it ensures consistent power quality and supports the evolving demands of modern electrical infrastructure.
Frequently Asked Questions
What is the main advantage of OLTC in a 35kV transformer?
OLTC (On-Load Tap Changer) allows voltage adjustment while the transformer is operating, ensuring uninterrupted power supply and stable voltage output under changing load conditions.
Can this transformer operate in renewable energy plants?
Yes, it is widely used in wind and solar power systems where voltage fluctuations are frequent and real-time regulation is required for grid stability.
What is the typical overload capability of this transformer?
It can typically handle short-term overloads up to 110%–120% of rated capacity, depending on the specific cooling method and operating conditions.
Is this transformer suitable for smart grid applications?
Yes, it is fully compatible with modern smart grid systems due to its automatic voltage regulation capabilities and stable performance characteristics.
What cooling systems are available for these units?
It supports ONAN (Oil Natural Air Natural) as the standard cooling method, with optional ONAF (Oil Natural Air Forced) for systems operating under higher load conditions.
What insulation classes are supported?
The transformer is designed with high-quality materials supporting Class F or Class H insulation, ensuring high thermal stability and safety.