25 KVA Pole Mounted Transformer-13.8/0.12/0.24 KV | Canada 2025

Conquer Space, Deliver Power. The Adaptive Pole Mounted Transformer.

01 General

1.1 Project Description

25 kVA single phase pole mounted transformer was delivered to Canada in 2025. The rated power of the transformer is 25 kVA with ONAN cooling. The high voltage is 13.8 kV with ±2*2.5% tapping range (NLTC), the low voltage is 0.12/0.24 kV, they formed a vector group of Ii6.

This is a highly reliable 125kV BIL Pole Mounted Transformer designed for demanding environments. Its exceptional 125kV Basic Impulse Insulation Level provides industry-leading protection against transient overvoltages, making it ideally suited for lightning-prone areas, coastal regions, and other locations with stringent surge protection requirements. The unit features a reinforced oil-paper insulation system and a hermetically sealed construction, ensuring long-term stability of the internal dielectric medium and enabling maintenance-free operation. Furthermore, its robust mechanical design and efficient thermal management guarantee durable and reliable performance under harsh weather conditions and fluctuating loads. This transformer serves as a core component for enhancing the resilience of power distribution networks in urban, rural, industrial parks, and renewable energy integration points. It significantly reduces the risk of lightning-induced failures and operational costs, delivering continuous and stable power supply to end-users.

1.2 Technical Specification

25 kVA pole mounted transformer specifications type and data sheet

1.3 Drawings

25 kVA pole mounted transformer diagram drawing and size.

02 Manufacturing

2.1 Core

SCOTECH’s pole – mounted transformer adopts a premium amorphous alloy core, which is made of ultra – thin amorphous magnetic strips with a disordered atomic structure. This advanced core material delivers ultra – low core loss-significantly lower than that of traditional silicon steel cores-while ensuring high magnetic permeability for efficient energy conversion. Its compact, lightweight design not only simplifies pole – mounted installation but also enhances corrosion resistance and operational stability, making it ideal for urban and rural distribution networks.

2.2 Tank

SCOTECH’s pole-mounted transformer is equipped with a sealed tank crafted from high-quality mild steel, finished in light grey (Number 70, Munsell notation 5BG7.0/0.4) for consistent aesthetics and environmental resilience. Boasting compact dimensions of 580*660*1050 mm, the hermetically sealed structure effectively shields internal components from moisture, dust, and external contaminants, ensuring long-term operational reliability in urban and rural distribution scenarios.

2.3 Surge Arrester Boss

This pole-mounted transformer features an integrated surge arrester boss, engineered for secure and precise mounting of surge arresters. Designed with robust structural integrity and compatibility with standard arrester configurations, this boss provides reliable mechanical support while facilitating quick, hassle-free installation. Its optimized design ensures effective diversion of transient overvoltages, safeguarding the transformer’s core components against electrical surges and enhancing overall grid operational safety.

2.4 HV Terminal

This pole-mounted transformer is equipped with reliable HV Terminals, featuring an H1 terminal (4-way, clamp type) for flexible and secure external connections, while the H2 terminal is internally linked to the tank via a robust bolt-type connection. This optimized terminal design ensures stable power transmission, simplifies on-site wiring, and enhances mechanical strength, delivering consistent performance and operational safety in distribution network applications.

2.5 Grounding

The pole-mounted transformer incorporates a comprehensive grounding system, including dedicated core grounding and tank grounding, complemented by a reliable grounding strap and stainless steel one-hole spade-type grounding terminals. This integrated design ensures effective dissipation of fault currents and static charges, minimizes electrical hazards, and enhances operational safety, while the durable terminal configuration enables secure, hassle-free grounding connections in distribution network installations.

2.6 Pressure Relief Device

The transformer is equipped with a robust pressure relief device, engineered to automatically release excess internal pressure caused by abnormal operating conditions (e.g., overheating or arcing). This critical safety component prevents tank deformation or damage, safeguarding internal transformer parts while ensuring operational integrity. With fast-acting performance and durable construction, it enhances overall system safety and reliability in urban and rural distribution network installations.

2.7 No-Excitation Tap Changer

SCOTECH’s pole-mounted transformer is equipped with a durable no-excitation tap changer, engineered for de-energized voltage regulation to adapt to grid fluctuations. Featuring precise tap positions, robust mechanical construction, and user-friendly operation, it enables accurate output voltage fine-tuning without energizing the transformer, ensuring operational safety and structural integrity. Compliant with industry standards, this component delivers reliable performance, helping maintain stable power supply quality across urban and rural distribution networks.

03 Testing

SCOTECH’s pole-mounted transformer undergoes rigorous testing covering turns ratio tests on each connection, polarity verification, no-load loss and exciting current measurements at 105% rated voltage, load loss and impedance tests at rated current and voltage, as well as applied and induced voltage withstand tests, plus a transformer tank leak-detection test. These comprehensive assessments ensure compliance with industry standards, validate electrical performance and structural integrity, and guarantee reliable, safe operation in distribution networks.

04 Packing and Shipping

05 Site And Summary

SCOTECH’s pole-mounted transformer integrates premium components-from the low-loss amorphous alloy core and hermetically sealed mild steel tank to the robust HV terminals, comprehensive grounding system, and reliable safety features like the pressure relief device and surge arrester boss-all validated through rigorous, standard-compliant testing. Engineered for efficiency, durability, and ease of installation, it delivers consistent, safe power distribution across urban and rural networks, embodying SCOTECH’s commitment to quality, innovation, and trusted performance for critical grid applications.