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Energy-Saving 20 KV 1000 KVA Three-Phase Oil-Immersed Transformer from China Suppliers & Factory
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
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
QWhat makes this oil-immersed transformer resistant to short circuits?
The transformer uses multi-dimensional structural optimization combined with advanced simulation software to accurately calculate the leakage magnetic field and electromagnetic force. Windings are wound with semi-hard copper wires on high-stiffness paper tubes with "0" tolerance wire buns, minimizing short-circuit electromagnetic force and ensuring reliable operational safety.
QHow does the cooling system extend the insulation lifespan?
A full oil circuit guiding cooling structure with longitudinal oil channels inside the windings enables efficient circulating cooling. Temperature field simulation optimizes the cooling path, reducing the average winding temperature rise by 10K compared to traditional products. This significantly slows insulation aging and more than doubles the insulation service life.
QDoes this transformer require regular oil maintenance or oil replacement?
No. The fully sealed bell-shaped or corrugated oil tank design completely isolates the transformer oil from the atmosphere. This prevents moisture, dust, and impurities from entering and slows oil deterioration, making the unit maintenance-free during normal operation.
QWhat is the available rated capacity range for this transformer?
The transformer is available in a wide range of rated capacities from 50 KVA up to 2500 KVA, covering a full spectrum of industrial and commercial power distribution requirements.
QWhat high-voltage tapping range is supported?
The transformer supports high-voltage tapping ranges of ±5% or ±2×2.5%, providing flexible voltage adjustment to suit varying grid conditions and application requirements.
QWhat is the short-circuit impedance of this transformer?
The short-circuit impedance for this series of oil-immersed transformers is 6.5%, which is a standard value that helps limit fault currents and protects connected equipment during abnormal grid events.