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10 kV 500 kVA Outdoor Power Distribution Transformer - China Suppliers Factory for Reliable 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
How much does the no-load loss of this oil-immersed transformer compare to traditional S9 series transformers?
Compared with traditional S9 series products, this transformer achieves an average no-load loss reduction of more than 30%, and the no-load current decreases by 70%–85%. This makes it a highly energy-efficient choice for long-term operation, even under light-load conditions.
What type of core material is used, and why does it reduce magnetic hysteresis loss?
The transformer uses high magnetic conductivity grain-oriented cold-rolled silicon steel sheets in an ultra-thin 0.20mm specification. Their magnetic permeability reaches 1.93T, with over 95% of the structure being easily magnetized. This significantly reduces magnetic hysteresis loss from the source.
What winding materials and structures are used to minimize load losses?
The windings are made of high-purity oxygen-free copper electromagnetic wire with special surface treatment to eliminate burrs and reduce resistance and eddy current losses. Depending on capacity, multi-layer cylindrical, intertwined continuous, or inner shielded winding structures are used. Large-capacity units may also use composite wires for further loss reduction.
What is the voltage regulation accuracy, and can it operate under full load during regulation?
Yes. The transformer is equipped with a high-precision on-load voltage regulating switch that allows tap position switching within the range of 0 to 100% of the rated load without interruption. The voltage regulation accuracy is ±2.5%, enabling precise and stable output voltage control in response to grid fluctuations.
What capacity range is available, and what are the connection group options?
This transformer is available in rated capacities ranging from 50 KVA to 2500 KVA. The connection group labels supported are Dyn11 and Yyn0, with a high voltage of 35/38.5 KV and a low voltage of 0.4 KV. High-voltage tapping ranges include ±5% and ±2×2.5%.
What is the short circuit impedance for this transformer series?
The short circuit impedance for all capacity models in this series is uniformly 6.5%, which ensures consistent performance in fault protection and system coordination across the full capacity range from 50 KVA to 2500 KVA.