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Energy-Saving China SZ11 Three-Phase Oil-Immersed Transformer 20 KV 1000 KVA - Efficient Factory Supplier Solutions
Product Features
⚡ High Short-Circuit Resistance and Reliable Operation Safety
Through multi-dimensional structural optimization design, the anti-short-circuit performance is enhanced. Advanced simulation software is used to accurately calculate the leakage magnetic field and force field of the windings, optimize the distribution of ampere-turns and shielding measures, and minimize the short-circuit electromagnetic force. The windings are wound using semi-hard copper wires or self-adhesive staggered wires on a high-stiffness hard paper tube. The wire buns are designed with "0" tolerance, the end wire turns are flattened and tightly bound with non-woven tape, and the insulation of key parts is strengthened.
🌡️ Efficient Heat Dissipation Design, Prolongs Insulation Lifespan
The full oil circuit guiding cooling structure is adopted, with longitudinal oil channels set inside the windings, combined with the end face guiding design of the coil. This enables the transformer oil to form an efficient circulating cooling circuit, quickly removing the heat from the windings and the core. The oil tank adopts a corrugated structure or is paired with an efficient plate-type heat sink. The corrugated oil tank's corrugations can freely expand and contract with the oil temperature, enhancing the heat dissipation area and improving the sealing performance. Through temperature field simulation to optimize the cooling path, the hotspot temperature of the windings is effectively reduced. Compared with traditional products, the average temperature rise is reduced by 10K, significantly delaying the insulation aging speed, and extending the insulation life of the equipment by more than double.
🔒 Fully Sealed Structure Design, No Maintenance Required and More Convenient to Use
A fully sealed bell-shaped oil tank or corrugated oil tank structure is adopted, eliminating the traditional oil reservoir. Through corrugated sheets or diaphragm-type oil reservoirs, the volume compensation of the oil is achieved, completely isolating the transformer oil from the atmosphere. This effectively prevents moisture, dust, and impurities from entering, and slows down the deterioration rate of the oil.
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 | Dyn1 / 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 is the rated capacity range of this oil-immersed transformer?
This oil-immersed transformer is available in a wide range of rated capacities, from 50 KVA up to 2500 KVA, making it suitable for various industrial and commercial power distribution applications.
Q
What voltage levels does this transformer support?
The transformer supports a high voltage (H.V.) of 35 KV or 38.5 KV, with a high-voltage tapping range of ±5% or ±2×2.5%, and a low voltage (L.V.) output of 0.4 KV, offering flexible adaptation to different grid requirements.
Q
How does the transformer's cooling system work?
The transformer uses a full oil circuit guiding cooling structure with longitudinal oil channels inside the windings and end face guiding design. The corrugated oil tank or plate-type heat sink facilitates efficient heat dissipation, reducing the average temperature rise by 10K compared to traditional products and extending insulation life by more than double.
Q
Does this transformer require regular maintenance?
No. Thanks to the fully sealed bell-shaped or corrugated oil tank structure, the transformer oil is completely isolated from the atmosphere. This prevents moisture, dust, and impurities from entering, eliminating the need for regular oil replacement or maintenance and significantly reducing operational costs.
Q
What short-circuit impedance does this transformer have?
The short-circuit impedance of this transformer is 6.5% across all rated capacity levels from 50 KVA to 2500 KVA, ensuring consistent and reliable performance under fault conditions.
Q
What measures are taken to enhance the short-circuit resistance of this transformer?
Advanced simulation software is used to accurately calculate leakage magnetic fields and force fields in the windings. The windings are wound using semi-hard copper wires or self-adhesive staggered wires on a high-stiffness paper tube with "0" tolerance wire bun design. End wire turns are flattened and tightly bound with non-woven tape, and insulation at key parts is reinforced to minimize short-circuit electromagnetic force.