Electric Vehicle (EV) Charging Distribution Transformers from Hammond Power Solutions
Posted May 19, 2026, updated August 13, 2026
As electric vehicle (EV) infrastructure expands, transformers play a critical role in powering EV charging stations with reliable, efficient energy. HPS EV charging transformers are specifically designed to manage the high and fluctuating loads of EV charging, delivering consistent performance in demanding conditions.
With advanced dry-type transformer technology and an optional robust 3RE+ enclosure that provides superior protection over standard ventilated designs, HPS EV charging transformers offer durability, energy efficiency, and dependable operation for high-volume and fast-charging applications.
Solving Real-World EV Charging Challenges
Harmonic Load Management
Certain DC fast chargers can introduce high harmonic currents which may lead to overheating in transformers. HPS offers K-factor transformers to help manage these harmonic loads.
Built to Brave the Elements
Some installations require an enclosure rating higher than Type 3R. In these cases, or when extra protection against heavy, blowing rain and snow is needed, we recommend the HPS 3RE+ enclosure. For warmer climates, low-temperature rise options reduce the risk of overheating and support consistent performance.
Color Integration
HPS offers a range of enclosure color options to match the look of modern EV charging stations.
Behind Every Charger is a Transformer
From city streets to highway rest stops, new EV chargers are popping up across North America. But while charging stations get all the attention, there’s a critical component working behind the scenes, often overlooked, but absolutely essential: the transformer.
The Most Rugged Outdoor Enclosure that meets Energy Efficiency Standards
Hammond Power Solutions’ optional 3RE+ enclosure is designed, tested, and built for real-world conditions.
The HPS 3RE+ enclosure* is a rugged, UL-certified outdoor solution designed to protect transformers in harsh, real-world environments. Built to perform in severe weather, the 3RE+ delivers dependable protection without added complexity.
- Louvers with filters block dust and debris and limits access to the transformer for improved safety, especially in public areas.
- Filters at entry points protect the transformer from blowing rain and snow.
- Bottom filters protect from ground moisture and debris.
*The HPS 3RE+ enclosure is available for transformers 75 kVA and above. The enclosure is designed to withstand severe weather conditions and has been tested to endure blowing snow and rain up to 120 km/h and block snow particles as small as 350 microns. We recommend consulting with our experts to ensure proper protection for your specific needs.
Main features and benefits
- Suitable for all Level 1-3 charging applications
- Meet or exceed U.S. Department of Energy (DOE 2016) 10 CFR Part 431 efficiency standards and comply with the latest Canadian Energy Efficiency Regulations (SOR/2018-201) as of NRCan 2019.
- Three phase from 15 kVA to 1000 kVA
- Frequency 60Hz
- 150°C temperature rise
- 220°C insulation class
- Standard aluminum windings
- Standard Type 3R enclosures
- UL listed (E112313)
- CSA Certified (LR3902)
- Meet NEMA ST-20 sound level standards
Optional Features
- Type 3RE+ enclosure for harsh environments
- Copper windings available for enhanced performance
- Low temperature rise options available to accommodate varying environmental conditions
- Custom colors available to match the look of your installation
- Thermal sensor for real-time temperature management available
- IR windows for easier maintenance checks
- Low sound level options to reduce noise in sensitive environments
- Custom sizes, ratings and styles available upon request
