Intelligent Technology, Exquisite Craftsmanship - The Three Phase Pad Mounted Transformer Redefines Power Safety and Reliability!
01 General
1.1 Project Description
2000 kVA three phase pad mounted transformer was delivered to Canada in 2025. The rated power of the transformer is 2000 kVA with ONAN cooling. The primary voltage is 25 kV with ±2*2.5% tapping range (NLTC), the secondary voltage is 0.6Y/0.347 kV, they formed a vector group of Dyn1.
The Three Phase Pad Mounted Transformer is a robust, outdoor-compatible electrical device widely used in urban and rural power distribution systems. Its primary function is to convert high-voltage power into low-voltage power to meet the needs of residential, commercial, and industrial users, providing reliable electricity support.
This device is typically equipped with various safety and monitoring devices to ensure efficient and safe operation. Among these, bayonet fuses and current-limiting fuses effectively protect the circuit, automatically disconnecting the power supply during overload or short-circuit conditions to prevent equipment damage. The load break switch allows operators to safely switch the circuit under load, facilitating maintenance and inspections. The de-energized tap changer is used to safely adjust the transformer’s output voltage to accommodate different load conditions, ensuring flexibility and stability in power supply.
Additionally, the top oil thermometer and oil level gauge can monitor the temperature and liquid level of the internal insulating oil in real time, promptly alerting operators to replenish the oil and maintain the health of the equipment. The vacuum pressure gauge helps monitor the internal vacuum state of the transformer, preventing moisture and impurities from entering, thereby prolonging the equipment’s lifespan. The pressure relief device can automatically release pressure when internal pressure becomes too high, ensuring the safety of the equipment.
These comprehensive features make the Three Phase Pad Mounted Transformer an indispensable component in modern power distribution systems, ensuring its reliability and stability under various operating conditions.
1.2 Technical Specification
2000 kVA pad mounted transformer specifications type and data sheet
| Delivered to | Canada |
| Year | 2025 |
| Type | Pad mounted transformer |
| Standard | CSA C227.4:21 |
| Rated Power | 2000 kVA |
| Frequency | 60HZ |
| Phase | 3 |
| Feed | Loop |
| Front | Dead |
| Cooling Type | ONAN |
| Primary Voltage | 25 kV |
| Secondary Voltage | 0.6Y/0.347 kV |
| Winding Material | Aluminum |
| Angular displacement | Dyn1 |
| Impedance | 5.75% |
| Tap Changer | NLTC |
| Tapping Range | ±2*2.5% |
| No Load Loss | 2.22 kW |
| On Load Loss | 18.3 kW |
| Accessories | Standard Configuration |
1.3 Drawings
2000 kVA pad mounted transformer diagram drawing and size.
02 Manufacturing
2.1 Core
| The three-phase three-column core is an internal structure of a transformer, responsible for conducting magnetic flux efficiently. This core is made by laminating silicon steel sheets to reduce power loss and improve the efficiency of voltage transformation. The three-column structure means that the core contains three independent magnetic circuits, each corresponding to a phase of current transmission. This arrangement optimizes the magnetic flux density, enabling the magnetic flux to circulate effectively within the core, thereby enhancing the performance and stability of the entire system. The three-column design not only supports the transmission of three-phase current but also reduces the leakage magnetic field phenomenon, ensuring the efficient operation of the transformer. The overall design aims to enable the power system to provide stable and reliable power transmission. |  |
2.2 Winding
 | The three-phase Pad Mounted Transformer features a winding design with angular rings that plays a crucial role. The angular ring serves to fix the main and auxiliary windings to the transformer core, ensuring they can withstand the electromagnetic and mechanical stresses generated during operation, thus maintaining stability and reliability. It also provides electrical isolation between the windings, preventing short circuits and enhancing electrical safety. Additionally, the angular ring improves electrical performance and safety by increasing the insulation and mechanical strength of the windings, reducing vibration and displacement, and enhancing durability and stability. It aids in heat dissipation, allowing the transformer to operate within normal temperature ranges and extending its lifespan. Moreover, it minimizes electromagnetic interference between windings, improving energy efficiency and utilization. |
2.3 Tank
| According to the Canadian Standards Association (CSA) standards, the oil tank of a three-phase Pad Mounted Transformer has several important features: the door is secured with three pentagonal bolts to enhance safety and sealing performance; there is no partition between the high-voltage and low-voltage chambers, simplifying oil flow and ensuring effective heat dissipation; and a grounding copper bar is installed in the low-voltage chamber to safely direct current to the ground in the event of a fault. These design elements combined ensure the safety, reliability, and efficiency of the oil tank, complying with CSA standards for strength while also considering maintenance convenience. |  |
2.4 Final Assembly
 | 1. Coil Installation: Winding coils are secured onto the core. 2. Hoisting the Active Part: The assembled active part (windings and core) is carefully hoisted into the oil tank. 3. Installing Accessories: Accessories like the pressure relief valve, bayonet fuse, and oil level gauge are installed for safe operation and monitoring. 4. Electrical Connections: Proper electrical connections between the primary and secondary windings are made. 5. Filling with Oil: Transformer oil is filled into the tank to fully immerse the active part, ensuring cooling and insulation. |
03 2000 KVA Pad Mount Transformer Accessories
 | Bayonet Fuse 3 Current Limit Fuse (CLF) 3 |
 | Load Break Switch 1 De-energized Tap Changer 1 |
 | Top Oil Thermometer 1 Oil Level Gauge 1 |
 | Vacuum Pressure Gauge 1 Pressure Relief Device 1 Oil Drain Valve with Sample Valve 1 |
04 Testing
05 Packing and Shipping
The three-phase Pad Mounted Transformer will be transported under CIF (Cost, Insurance, and Freight) terms to the port of Montreal, Canada. The goods will be shipped via sea to ensure safety and efficiency. The shipper will provide insurance for the cargo to protect against any potential losses or damages during transit. Upon arrival in Montreal, the goods will undergo customs clearance procedures, ensuring all relevant documentation is complete for smooth processing. After customs clearance, the transformer will be safely transported to its final destination.
06 Site And Summary
The three-phase Pad Mounted Transformer plays a crucial role in electrical distribution systems, providing efficient and safe power conversion and distribution solutions. Its robust design and outstanding performance make it an ideal choice for various applications. As the demand for electricity continues to rise and the promotion of renewable energy expands, the three-phase Pad Mounted Transformer will remain significant in the future of electrical infrastructure, driving sustainable development in the power industry.
