Unyielding Power, Unmatched Efficiency: Substation Transformers for Every Need!
01 General
1.1 Project Description
2000 kVA substation transformer was delivered to Canada in 2025. The rated power of the distribution substation transformer is 2000 kVA with ONAN cooling. The primary voltage is 44 kV with ±2*2.5% tapping range (NLTC), the secondary voltage is 0.48Y/0.277 kV, they formed a vector group of Dyn1.
With flexible design and high manufacturing quality, distribution substation transformerproduced by SCOTECH effectively meet diverse customer requirements. In addition to delivering reliable power conversion and distribution, these transformers feature advanced designs to reduce arc flash risks and minimize environmental impact. They can be tailored to specific operational scenarios, including adaptation to unique working environments, high-altitude conditions, and specific efficiency requirements. Users can also choose from a variety of insulation connection options, such as top-mounted or sidewall-mounted bushings, ensuring seamless integration into primary or secondary distribution systems.
Whether for urban grids, industrial power facilities, or large infrastructure projects, substation transformers provide efficient, safe, and environmentally friendly energy management solutions-serving as the cornerstone of modern power networks.
1.2 Technical Specification
2000 kVA substation transformer specifications type and data sheet
| Delivered to | Canada |
| Year | 2025 |
| Type | Substation transformer |
| Standard | CSA C88:16 |
| Rated Power | 2000 kVA |
| Frequency | 60HZ |
| Phase | 3 |
| Cooling Type | ONAN |
| Primary Voltage | 44 kV |
| Secondary Voltage | 0.48 kV |
| Winding Material | Aluminum |
| Angular displacement | Dyn1 |
| Impedance | 6% |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| No Load Loss | 2.15kW |
| On Load Loss | 18.6kW |
| Accessories | Standard Configuration |
1.3 Drawings
2000 kVA distribution substation transformer diagram drawing and size.
02 Manufacturing
2.1 Core
Common core structures include three-phase three-leg and three-phase five-leg designs. The three-phase three-leg core is widely used for its compact structure and cost-effectiveness, while the three-phase five-leg core offers higher stability and lower flux leakage, suitable for more complex power demands.
Transformer cores typically feature meticulously designed laminated structures to reduce eddy current losses through thin steel sheets. High-quality materials such as silicon steel, high-silicon alloys, and non-oriented electrical steel are used to optimize magnetic permeability and minimize losses. Superior design not only enhances stability and efficiency under various operational conditions but also reduces operational costs and strengthens the transformer’s resistance to short circuits and overloads.
2.2 Winding
 | distribution substation transformer utilize a rectangular coil configuration, incorporating wire-wound high-voltage primary windings and sheet-wound secondary windings. This sophisticated design minimizes axial stress from short circuits while ensuring effective magnetic balancing of tap connections. The coils are crafted with precision using advanced winding machinery, which enables meticulous tension control and optimal conductor placement, thereby enhancing short-circuit strength and operational efficiency. High-quality diamond-pattern epoxy-coated paper insulation is employed throughout the windings, providing reinforced structural integrity and superior electrical insulation at critical stress points. This innovative design facilitates efficient circulation of cooling fluid, maintaining optimal operating temperatures. Coil assemblies undergo a rigorous heat-curing process under carefully calculated hydraulic pressure, solidifying the components to withstand the forces generated during short circuits. This meticulous engineering ensures that transformer coils deliver outstanding performance and reliability, significantly contributing to the overall stability of the electrical distribution system. |
2.3 Tank
| Transformer tanks are engineered for exceptional strength, durability, and ease of handling, installation, and maintenance. Constructed from precision-cut, hot-rolled, pickled, and oiled steel, these tanks are meticulously welded to ensure structural integrity and longevity. They are designed to provide robust protection for the insulating fluid as well as other internal components critical to the transformer’s operation. The tanks undergo stringent design testing, demonstrating the ability to endure pressures of up to 7 psig without experiencing permanent distortion and 15 psig without any risk of rupture. This rigorous testing ensures that the tanks can withstand challenging operational conditions, thereby enhancing the overall reliability and safety of the transformer system. Through innovative design and high-quality materials, these tanks play a vital role in safeguarding the functionality and efficiency of substation transformers. |  |
2.4 Final Assembly
 | Core and Coil Assembly: Reinforce the core with heavy steel ends to prevent winding distortion. Vacuum Processing: Dry the transformer and fill it with filtered insulating oil under vacuum while energizing the secondary windings to expel moisture. Tank Installation: Install a sealed oil tank for effective heat dissipation. Electrical Connection: Connect high and low voltage sides with the external distribution system. Oil Filling and Treatment: Inject high-quality insulating oil into the transformer tank and conduct degassing treatment to ensure the oil’s insulating properties. |
03 Testing
| No. | Test Item | Unit | Acceptance Values | Measured Values | Conclusion |
| 1 | Resistance Measurements | % | Maximum resistance unbalance rate | 3.47 | Pass |
| 2 | Ratio Tests | % | The deviation of voltage ratio on the principal tapping: ≤0.5% | 0.02 | Pass |
| 3 | Phase-Relation Tests | / | Dyn1 | Dyn1 | Pass |
| 4 | No-Load Losses and Excitation Current | % kW | I0 :: provide measured value P0: provide measured value | 0.21 1.833 | Pass |
| 5 | Load Losses Impedance Voltage and Efficiency | % kW kW | t:85℃ Z%: measured value Pk: measured value Pt: measured value the tolerance for impedance is ±7.5% Efficiency not less than 99.37% | 6.30 17.404 19.237 99.43 | Pass |
| 6 | Applied Voltage Test | kV | HV: 95kV 60s LV: 10kV 60s | No collapse of the test voltage occurs | Pass |
| 7 | Induced Voltage Withstand Test | kV | Applied voltage (KV): 2 Ur Duration(s):40 Frequency (HZ): 180 | No collapse of the test voltage occurs | Pass |
| 8 | Leakage Test | kPa | Applied pressure: 50kPA Duration: 12h | No leakage and no Damage | Pass |
| 9 | Insulation Resistance Measurement | GΩ | HV-LV to Ground : LV-HV to Ground: HV&LV to Ground: | 55.0 29.8 36.2 | Pass |
| 10 | Oil Test | kV, mg/kg, %, mg/kg, | Dielectric Strength; Moisture Content; Dissipation Factor; Furan Analysis ; Gas Chromatography Analysis | 55.1 7.8 0.187 ≤0.1 / | Pass |
04 Packing and Shipping
05 Site And Summary
In summary, our distribution substation transformer are designed to provide exceptional reliability and high efficiency, empowering your grid with advanced performance and lasting durability. With cutting-edge technological innovations and stringent quality control, we ensure seamless and stable energy distribution solutions for modern infrastructure. Choosing our products means opting for the safety and intelligence of future power transmission. Feel free to contact us at any time to explore how our solutions can help you build a stronger energy system.
