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China Suppliers Factory: 10kV 500kVA Outdoor Power Distribution Transformer with Non-excited Voltage Regulation
⚡ Product Features
1
Ultra-low no-load loss, a green and 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, with stable and 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 a 45° full inclined seam holeless stacking process. These technologies reduce no-load loss by more than 30% and no-load current by 70%–85% compared to traditional S9 series products, making it significantly more energy-efficient.
Q
What winding material is used, and why does it reduce load loss?
The windings are made of high-purity oxygen-free copper electromagnetic wire with special surface treatment to ensure smoothness and eliminate burrs. This reduces resistance and eddy current losses. The optimized ampere-turn distribution ensures even current flow, minimizing local overheating and concentrated energy losses.
Q
What is the voltage regulation accuracy of this transformer?
This transformer is equipped with a high-precision on-load voltage regulating switch that achieves a voltage regulation accuracy of ±2.5%. It can smoothly switch tap positions within 0–100% of the rated load range and quickly respond to power grid voltage fluctuations to maintain stable output voltage.
Q
What capacity range is available for this oil-immersed transformer?
The transformer is available in a wide range of rated capacities from 50 KVA up to 2500 KVA, with high voltage options of 35KV or 38.5KV and a low voltage output of 0.4KV, making it suitable for various industrial and commercial power distribution applications.
Q
Can this transformer operate under load without interruption during voltage regulation?
Yes. The transformer features on-load voltage regulation capability, meaning it can switch tap positions and adjust output voltage without interrupting the power supply or disconnecting the load. This ensures continuous, stable operation in demanding power distribution environments.
Q
What connection group labels are supported, and what is the short circuit impedance?
This transformer supports both Dyn11 and Yyn0 connection group labels. The short circuit impedance is 6.5% across all available capacity ratings, ensuring reliable protection and stable performance during fault conditions.