50 kVA electrical transformer on pole - dual-voltage with IFD for reliable Canadian rural distribution
01 General
1.1 Customer Pain Points
Canadian distribution networks typically require 120/240 V secondary output, while operating across multiple primary voltage structures, particularly in rural and low-density regions. Utilities are therefore under pressure to deploy electrical pole transformer transformers that can adapt to different feeder configurations without increasing complexity.
Key challenges include:
• Limited access in rural areas, requiring high reliability and minimal maintenance
• Increased focus on operational safety, especially internal fault protection
• Inventory and logistics pressure caused by single-voltage transformer designs
Traditional solutions often lack the flexibility needed to address these challenges, making a dual-voltage pole-mounted transformer with integrated IFD protection a more efficient and safer alternative.
1.2 Canadian Overhead Distribution Networks
This 50kVA Pole-mounted electrical transformer is designed for overhead distribution systems supplying 120/240 V service in Canada. Its configuration makes it particularly suitable for:
• Rural overhead feeder lines
• Residential communities and light commercial loads
• Utility distribution networks requiring CSA C2.2-06 compliance
The dual-voltage primary design enables deployment across different network sections without structural changes, enhancing system flexibility while maintaining consistent performance under outdoor operating conditions.
1.3 Product Advantages
This pole-mounted electrical transformer delivers a balanced combination of flexibility, safety, and energy efficiency through the following advantages:
- Dual-voltage primary configuration
Reduces on-site replacement requirements and simplifies inventory management. - Integrated Internal Fuse Device (IFD)
Provides enhanced internal fault protection, improving operational safety and reducing risk to surrounding equipment. - High energy efficiency
Efficiency of ≥98.83% helps lower long-term operating costs. - Optimized low-loss design
- No-load loss: 139 W
- Load loss: 693 W
Ensures stable thermal performance and reliable long-term operation.
Combined with ONAN cooling and a robust pole-mounted design, this solution meets the practical demands of Canadian overhead distribution networks.
1.4 Technical Specification
50kVA electrical transformer on pole specification and data sheet
| Delivered to | Canada |
| Year | 2025 |
| Type | Pole mounted transformer |
| Standard | CSA C2.2-06 |
| Rated Power | 50KVA |
| Frequency | 60HZ |
| Phase | Single |
| Cooling Type | ONAN |
| Liquid insulant | Mineral Oil |
| Primary Voltage | 2.4*7.2-0.12/0.24kV |
| Secondary Voltage | 120 / 240 V |
| Polarity | Additive |
| Vector Group | Ii6 |
| Winding Material | Aluminum |
| Impedance | 2.85%(±10%) |
| Efficiency | ≥98.83% |
| Tap Changer | NLTC |
| No Load Loss | 139 W |
| On Load Loss | 693 W |
| Accessories | Dual-voltage transformer with IFD |
1.5 Drawings
50kVA electrical transformer on pole dimensions and weight details
02 Manufacturing
2.1 Core
Coil setup: LV foil, HV wire, mix of copper and aluminum. Foil spreads current, sheds heat. Wire bends, stays insulated. Copper-aluminum blend hits efficiency and cost right. Durable. Works in urban streets, rural lines, whatever the day throws at it. Reliable, steady, doing its job without fuss. |  |
2.2 9kV HV Arrester
 | A 9kV high voltage arrester is installed to protect the transformer from lightning surges and transient overvoltage events common in overhead distribution systems. By limiting surge voltage before it reaches internal insulation, the arrester reduces electrical stress on critical components and improves overall transformer durability in rural network applications. |
2.3 Internal Fuse Device (IFD)
| The Internal Fuse Device (IFD) is designed to disconnect the transformer internally during severe fault conditions. This protection mechanism reduces the risk of tank rupture, limits fault impact, and enhances personnel and system safety. The integrated IFD complies with utility safety requirements for pole-mounted transformers in Canadian distribution networks. |  |
2.4 50 kVA Electrical Pole Transformer Details
2.5 Final Assembly
| At the final assembly stage, the transformer’s active parts are fully completed, with the core and windings securely assembled and all internal leads precisely welded and connected. Switching components are installed and fixed in position, forming a finished transformer core assembly. |  |
03 FAQ
Q1: How is the dual-voltage primary configuration selected or changed?
A: The transformer is equipped with a dual-voltage primary design, allowing voltage selection through predefined internal connections during installation or commissioning.
Q2: Is this transformer suitable for long rural feeder lines?
A: Yes. With optimized impedance (2.85% ±10%) and high efficiency, the transformer performs reliably on long rural overhead distribution lines.
Q3: Can the transformer be customized for specific utility requirements?
A: Yes. The single phase pole mounted Transformer can be customized to comply with IEC, ANSI/IEEE, CSA, RUS, and NEMA standards, with flexible options for rating, voltage, frequency, cooling method, impedance, vector group, tank material, and accessories such as lightning arresters and IFD.
04 Packing and Shipping
