Powering Cities, Industries & Beyond – High-Efficiency Substation Transformers for a Smarter Grid.
01 General
1.1 Project Description
2000/2300 kVA electrical substation transformer was delivered to America in 2025. The rated power of the transformer is 2000/2300 kVA with KNAN/KNAF cooling. The primary voltage is 13.8 kV with ±2*2.5% tapping range (NLTC), the secondary voltage is 0.48GrdY/0.277 kV, they formed a vector group of Dyn1.
Introducing our 2000/2300 kVA electrical substation transformer – a robust power solution engineered for demanding applications in Automatic Power Control (APC), High Airflow Facilities (HAF), High-Load Substations (HLSB), and Wagon Loading Systems. This high-performance transformer features a 5A neutral grounding resistor for enhanced fault protection, a precision 5:5 ratio current transformer for accurate monitoring, and a C10 short-circuit rating to withstand extreme electrical stresses.
Designed for reliability in critical infrastructure, it delivers stable power distribution for automated control systems, high-capacity cooling environments, heavy-load substations, and rail logistics operations. With its rugged construction and advanced safety features, including optimized fault current limitation and durable short-circuit withstand capability, this transformer ensures uninterrupted operation where power quality and system protection are paramount. Optional configurations include remote monitoring capabilities and customized cooling solutions to meet specific operational requirements.
1.2 Technical Specification
2000/2300 kVA electrical substation transformer specifications type and data sheet
| Delivered to | America |
| Year | 2025 |
| Type | Substation transformer |
| Standard | ANSI/IEEE C57.12.00 |
| Rated Power | 2000/2300 kVA |
| Frequency | 60HZ |
| Phase | 3 |
| Cooling Type | KNAN/KNAF |
| Primary Voltage | 13.8 kV |
| Secondary Voltage | 0.48GrdY/0.277 kV |
| Winding Material | Copper |
| Angular displacement | Dyn1 |
| Impedance | 6% |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| No Load Loss | ≤2.36kW |
| On Load Loss | ≤17kW |
1.3 Drawings
2000/2300 kVA electrical substation transformer diagram drawing and size.
02 Manufacturing
2.1 Core
The laminated core is a critical component of a three-phase, three-limb substation transformer, providing a low-reluctance path for magnetic flux while minimizing eddy current losses. Constructed from stacked silicon steel laminations, the core features a three-column design that optimizes magnetic flux distribution for balanced three-phase operation. Its robust structure ensures high efficiency, reduced no-load losses, and reliable performance under varying load conditions. The laminated design also enhances thermal stability and mechanical strength, making it ideal for high-power substation applications.
2.2 Winding
 | LV Winding: Made of copper foil, offering compact layers, uniform transformer cooling, and high short-circuit strength. HV Winding: Multi-layer helical winding with reinforced insulation, optimized inter-turn capacitance for high-voltage stability. |
2.3 Tank
| The transformer tank serves as the protective enclosure for the main transformer, constructed with high-quality welded steel plates in a fully sealed design. The tank undergoes rigorous pressure tests to ensure reliable performance under operational oil pressure variations and internal fault conditions. Multiple flanged openings are provided for bushings, oil level indicators, and monitoring devices. Interior surfaces receive anti-corrosion treatment and include magnetic shielding to reduce stray losses. Custom options include anti-corrosion coatings or stainless steel construction for demanding environments. |  |
2.4 Final Assembly
 | The substation transformer assembly involves core stacking, winding installation (foil LV + wire HV), active part fixing, terminal connection, tank sealing, and accessory mounting, with vacuum transformer oil filling and factory tests (ratio, impedance, temperature rise, etc.) to ensure compliance. Modular design enables easy transport and maintenance. |
03 Testing
| No. | Test Item | Unit | Acceptance Values | Measured Values | Conclusion |
| 1 | Resistance Measurements | % | Maximum resistance unbalance rate
| 4.55 | Pass |
| 2 | Ratio Tests | % | The deviation of voltage ratio on the principal tapping: ≤0.5% | -0.07~0.12 | Pass |
| 3 | Phase-relation tests | / | Dyn1 | Dyn1 | Pass |
| 4 | No-load losses and excitation current | % | I0 :: provide measured value | 0.35 | Pass |
| kW | P0: provide measured value | 2.096 | |||
| / | the tolerance for no load loss is +0% | / | |||
| 5 | Load losses , impedance voltage, total losses and efficiency | / | t:85℃ the tolerance for impedance is +7.5% the tolerance for total load loss is +0% | / | Pass |
| % | Z%: measured value | 6.38 | |||
| kW | Pk: measured value | 16.642 | |||
| kW | Pt: measured value | 18.738 | |||
| % | Efficiency not less than 99.27% | 99.30 | |||
| 6 | Applied Voltage Test | / | HV:34kV 60s LV: 10kV 60s | No collapse of the test voltage occurs | Pass |
| 7 | Induced Voltage Withstand Test | / | Applied voltage (KV):0.96 | No collapse of the test voltage occurs | Pass |
| Duration(s):40 | |||||
| Frequency (HZ): 180 | |||||
| 8 | Insulation Resistance Measurement | GΩ | HV-LV to Ground: | 6.50 | / |
| LV-HV to Ground: | 7.12 | ||||
| HV&LV to Ground: | 5.05 | ||||
| 9 | Leakage Test | / | Applied pressure：50kPA | No leakage and no Damage | Pass |
| Duration：12h | |||||
| 10 | Oil Test | kV | Dielectric Strength | 51.6 | Pass |
| mg/kg | Moisture Content | 176.8 | |||
| % | Dissipation Factor | 3.205 | |||
| mg/kg | Furan Analysis | / | |||
| / | Gas Chromatography Analysis | / |
04 Packing and Shipping
4.1 Packing
The electrical substation transformer adopts fully enclosed steel-wood composite packaging. The main frame is constructed with high-strength welded channel steel, equipped with internal anti-vibration supports. The crate features integrated lifting lugs for safe handling with cranes or forklifts and is clearly labeled with warnings (e.g., “Fragile,” “Keep Dry”). Essential documents (packing list, transformer test reports) are stored in a waterproof pouch inside the packaging.
4.2 Shipping
The electrical substation transformer is trucked to the port on a heavy-duty trailer, securely strapped to prevent shifting. At the port, it’s loaded into a container, with proper bracing and moisture protection. The sealed container is then shipped by ocean vessel with real-time tracking. Customs documents are prepared in advance for smooth clearance.
05 Site And Summary
As a critical component in power infrastructure, our electrical substation transformer deliver reliable performance, robust construction, and energy-efficient operation. Engineered to meet global standards, they ensure stable electricity transmission for industrial, commercial, and utility applications. With customizable options and rigorous quality control, we provide solutions tailored to your grid demands. Contact us to power your projects with confidence.
