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10kV 500kVA Outdoor Power Distribution Transformer - China Suppliers & Factory for Voltage Regulation Solutions
⚡ Product Features
1
Ultra-low no-load loss — A Green & Energy-Saving Benchmark
The key lies in using high magnetic conductivity grain-oriented cold-rolled silicon steel sheets, preferably in the ultra-thin 0.20mm specification. Their magnetic permeability can reach 1.93T, with the easily magnetized structure accounting for over 95%. This reduces magnetic hysteresis loss from the source. During production, the 45° full inclined seam holeless stacking process and the horizontal five-step laminating technology are adopted, combined with the core column epoxy glass tape binding reinforcement. This minimizes the magnetic circuit gap and leakage loss to the greatest extent. Compared with traditional S9 series products, the average no-load loss is reduced by more than 30%, the no-load current decreases by 70%–85%, and even during long-term light-load operation, significant energy savings can be achieved.
2
Low Load Loss — Efficient Power Transmission
The windings are made of high-purity oxygen-free copper electromagnetic wire, which undergoes special surface treatment to ensure the smoothness and absence of burrs on the wire, effectively reducing the resistance and eddy current losses. According to the capacity requirements, multi-layer cylindrical, intertwined continuous, or inner shielded winding structures are adopted. For large-capacity products, composite wires are also used. By optimizing the arrangement of the wire buns and the distribution of ampere-turns, the winding current is evenly distributed, reducing local overheating and concentrated losses.
3
Load-Carrying Non-Stop Voltage Regulation — Stable & Controllable Voltage
Equipped with a high-precision on-load voltage regulating switch, a separate voltage regulating winding is specially designed. The axial dimensions and magnetic center of each winding are strictly controlled to ensure stable electromagnetic balance during the voltage regulation process. It can smoothly switch the tap position within the range of 0 to 100% of the rated load. The voltage regulation accuracy is ±2.5%, and it can quickly respond to voltage fluctuations in the power grid and precisely maintain the output voltage within the set range.
📋 Product Specifications
| Rated Capacity (KVA) | Connection Group Label | Voltage Combination (KV) | No-Load Current (%) | Load Loss (T) | No-Load Loss (T) | Short Circuit Impedance (%) | ||
| (H.V.) | High-Voltage Tapping Range | (L.V.) | ||||||
| 50 | Dyn11 Yyn0 |
35 38.5 |
±5% ±2×2.5% |
0.4 | 1.30 | 2100/1140 | 130 | 6.5 |
| 100 | 1.10 | 2010/1910 | 185 | |||||
| 125 | 1.10 | 2370/2260 | 215 | |||||
| 160 | 1.00 | 2820/2680 | 225 | |||||
| 200 | 1.00 | 3320/3160 | 270 | |||||
| 250 | 0.95 | 3950/3760 | 320 | |||||
| 315 | 0.95 | 4750/4530 | 385 | |||||
| 400 | 0.85 | 5740/5470 | 465 | |||||
| 500 | 0.85 | 6910/6580 | 545 | |||||
| 630 | 0.65 | 7860 | 665 | |||||
| 800 | 0.65 | 9400 | 785 | |||||
| 1000 | 0.65 | 11500 | 920 | |||||
| 1250 | 0.60 | 13900 | 1120 | |||||
| 1600 | 0.60 | 16600 | 1350 | |||||
| 2000 | 0.55 | 19700 | 1590 | |||||
| 2500 | 0.55 | 23200 | 1890 | |||||
📷 Detail Pictures
❓ Frequently Asked Questions
Q
What makes this oil-immersed transformer more energy-efficient than traditional S9 series transformers?
This transformer uses ultra-thin 0.20mm grain-oriented cold-rolled silicon steel sheets with magnetic permeability up to 1.93T, combined with the 45° full inclined seam holeless stacking process. These technologies reduce average no-load loss by more than 30% and decrease no-load current by 70%–85% compared to traditional S9 series products, making it a significantly greener and more energy-efficient solution.
Q
What winding material is used, and how does it reduce load loss?
The windings are made of high-purity oxygen-free copper electromagnetic wire with special surface treatment to eliminate burrs and ensure smoothness. This effectively reduces resistance and eddy current losses. Multi-layer cylindrical, intertwined continuous, or inner shielded winding structures are selected based on capacity requirements, and composite wires are used for large-capacity units to further minimize concentrated losses.
Q
What is the voltage regulation accuracy, and can it operate without interruption during regulation?
Yes. The transformer is equipped with a high-precision on-load voltage regulating switch that allows smooth tap-position switching within the range of 0 to 100% of rated load without any power interruption. The voltage regulation accuracy is ±2.5%, enabling precise and stable output voltage even when grid fluctuations occur.
Q
What capacity range does this transformer cover, and what are the available connection group labels?
This transformer is available in rated capacities ranging from 50 KVA to 2500 KVA. It supports two connection group labels: Dyn11 and Yyn0, with a high voltage of 35/38.5 KV and a low voltage of 0.4 KV, making it suitable for a wide range of industrial and commercial power distribution applications.
Q
What is the short circuit impedance value for this transformer series?
The short circuit impedance for the entire capacity range (50 KVA to 2500 KVA) is uniformly 6.5%, which is a standard value that ensures reliable protection against short circuit faults while maintaining stable system operation.
Q
Is this transformer suitable for long-term light-load operation?
Yes. Thanks to its ultra-low no-load loss design and significantly reduced no-load current (70%–85% lower than S9 series), this transformer performs exceptionally well even during long-term light-load conditions, delivering meaningful energy savings and reducing operational costs over time.