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10kV 500kVA Outdoor Voltage Regulating Transformer - China Suppliers & Factory for High-Quality Power Distribution
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 Output
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 the no-load loss of this oil-immersed transformer significantly lower than traditional S9 series products?
This transformer uses high magnetic conductivity grain-oriented cold-rolled silicon steel sheets in the ultra-thin 0.20mm specification with magnetic permeability up to 1.93T. Combined with the 45° full inclined seam holeless stacking process and horizontal five-step laminating technology, the magnetic circuit gap is minimized, resulting in over 30% reduction in no-load loss and a 70%–85% decrease in no-load current compared to traditional S9 series products.
Q
What type of 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 reduces resistance and eddy current losses. Multi-layer cylindrical, intertwined continuous, or inner shielded winding structures are selected based on capacity, and composite wires are used for large-capacity products to further optimize current distribution and minimize concentrated losses.
Q
Can the transformer regulate voltage without interrupting the load?
Yes. This transformer is equipped with a high-precision on-load voltage regulating switch and a dedicated voltage regulating winding. It can smoothly switch tap positions across 0–100% of rated load without any power interruption, maintaining voltage regulation accuracy of ±2.5% to precisely stabilize the output voltage even during grid fluctuations.
Q
What rated capacity range is available for this transformer series?
This transformer series covers a wide range of rated capacities from 50 KVA up to 2500 KVA, making it suitable for various industrial and commercial power distribution applications with different load requirements.
Q
What are the available connection group labels and high-voltage configurations?
The transformer supports Dyn11 and Yyn0 connection group labels. The high-voltage (H.V.) options are 35 kV and 38.5 kV, with high-voltage tapping ranges of ±5% or ±2×2.5%, and a standard low-voltage (L.V.) output of 0.4 kV. The short circuit impedance is 6.5% across all capacity ratings.
Q
Is this transformer suitable for long-term light-load operation?
Yes. Thanks to the ultra-low no-load loss design achieved through premium silicon steel core materials and advanced laminating processes, this transformer maintains high energy efficiency even under prolonged light-load conditions. This makes it an ideal green and energy-saving solution for scenarios where the load varies significantly over time.