At Johnson Phillips, we’re not just about transformers; we’re about powering your world reliably and efficiently. As a leading transformer manufacturer, we specialise in providing custom power transformers that meet international safety standards, ensuring peace of mind for our customers worldwide.
Need your transformers in a hurry? We’ve got you covered with a super fast dispatch and delivery, ensuring minimal downtime for your operations.
What Transformers Do We Manufacturer?
We design, manufacture, and supply a wide range of cold-rolled grain-oriented (CRGO) double-wound distribution transformers, available in both liquid-filled (oil or Midel) and dry-type (cast resin) configurations. Our transformers are cost-effective and fully compliant with EU Eco-design standards, making them an ideal choice for budget-conscious projects.
Built to meet the rigorous demands of modern distribution networks, our transformers adhere to internationally recognized standards, including BS, IEC, and ANSI, while ensuring full compliance with the EU Eco Design Directive.
Our Transformer Manufacturing Process
At Johnson & Phillips, we follow a precise, customer-focused process to deliver high-quality transformers that meet your exact specifications.
1. Consultation & Design
We start by discussing your specific needs, such as voltage, power ratings, and environmental factors, and then design a transformer tailored to your requirements.
2. Material Selection
Using top-grade CRGO steel for the core and premium copper or aluminium windings, we ensure durability and efficiency. The choice of liquid-filled (oil or Midel) or dry-type (cast resin) insulation is based on your preference.
3. Core & Coil Manufacturing
The core is carefully crafted to minimise energy losses, and coils are precisely wound to guarantee reliable performance.
4. Assembly & Testing
After assembly, every transformer undergoes rigorous testing to meet international standards (BS, IEC, ANSI) and ensure safe, efficient operation.
5. Delivery & Support
We coordinate delivery and provide installation support, along with ongoing maintenance to ensure optimal long-term performance.
Transformer Refurbishment
At Johnson & Phillips, as well as manufacturing transformers from scratch, we also specialise in transformer refurbishment, which offers a cost-effective, sustainable solution to extend the lifespan of your existing equipment. With decades of experience in re-engineering power systems, our expert engineers are dedicated to restoring transformers to peak operational performance, often surpassing their original efficiency.
By refurbishing your transformers, we help reduce industrial waste and maximise resource utilisation, aligning with modern sustainability goals. Every refurbished transformer undergoes rigorous testing and adheres to internationally recognised standards, including BS, IEC, and ANSI, ensuring long-lasting reliability and safety. For added assurance, we back all of our refurbishment work with an industry-leading 2-year performance guarantee, giving you peace of mind while enhancing your power generation efficiency.
Why Use Johnson & Phillips?
- Comprehensive Solutions: We manage every step, from design and delivery to ongoing transformer repairs and maintenance.
- Customised Designs: Every solution is tailored to your exact specifications for optimal performance.
- Advanced Technology: We use cutting-edge innovations to deliver superior efficiency and reliability.
- Reliability Assured: We rigorously test transformers to ensure that they operate at peak performance.
- Expert Support: Our specialists are here to guide you, offering repair and maintenance at every stage.
- Proven Track Record: Decades of success with a portfolio of trusted projects (view our case studies).
- Seamless Integration: Effortless integration with minimal disruption to your operations.
- End-to-End Service: From testing to repairs, we offer complete long-term reliability solutions.
Contact our team today for more information on how we can design and manufacture the ideal transformer for your needs or to discuss your specific project requirements. We’re here to provide tailored solutions and reliable support every step of the way.

