ESU buys and sells new & used Hammond Power Solutions Electric Transformers.


Electrical Supplies Unlimited buys and sells new and used Hammond Power Transformers and more for San Diego surrounding areas. HPS is the largest manufacturer of dry-type transformers in North America. Hammond engineer and manufacture a wide range of standard and custom transformers that are used worldwide in electrical equipment and systems. ESU will buy your used Hammond Power Transformers such as the Hammond nmk045kb 45 kVa 480 VAC Delta Primary 208 Star/120 VAC Secondary 3-Phase Distribution Transformer T3045K0023B.

  • More efficient
  • Smaller and lighter
  • 5-10 times increase in KVA
  • Versatile, many applications

Welcome to ESU, your go-to destination for all your electrical supply needs in San Diego! We specialize in buying, selling, and stocking a wide range of electrical transformers, including the renowned Hammond Power Solutions (HPS) line. Whether you're an electrician working on a commercial project or a homeowner looking for reliable electrical components, ESU has you covered. Our inventory features new, surplus, and recycled transformers, ensuring a diverse selection to meet your specific requirements. With a focus on quality and sustainability, we provide access to Hammond Power Solutions transformers, known for their durability and efficiency. Trust ESU to be your trusted partner in San Diego for all things electrical - where new possibilities spark from recycled potential. Contact us today to explore our comprehensive range and discover why ESU is the preferred choice for electricians and homeowners alike.

ESU Inc has been in the electrical supply business for over 40 years. We have a large inventory of new, surplus and recycled electrical supplies both for the commercial and residential markets. We are a fully stocked Electrical Distributor and Electrical Wholesaler with many different lines in stock. We specialize in  hard to find items. Our staff is very knowledgeable and our mission is to ensure that our customers expectations are exceeded. Ask around, our reputation is what makes us! Or just call to find out yourself at 858.558.2850.

We stock most major brands including Hammond Power Supply, Acme Electric, General Electric, ITE Siemens, Cutler Hammer, Square D, FPE Federal Pacific, Pushmatic, Zinsco, Crouse Hinds, Challenger, Westinghouse, Sylvania, and Bryant.

Featured Transformer Specifications

45 kVa 480 VAC Delta Primary 208 Star/120 VAC Secondary 3-Phase Distribution Transformer