Welcome to our help center

Use this page for finding information and calculating the transformer you need for your project.

Start here:

We offer a number of ways to get technical assistance. Use our catalog and other literature as well as our field sales force as your valuable technical resources. For field installers, we provide detailed wiring diagrams in each and every transformer that’s shipped. In addition to the many on-line resources available here, we offer a toll-free technical support hotline staffed by experienced application engineers. We can help you select stock transformers, find a modified design, walk you through special wiring configurations or banking needs and troubleshoot problems. Have special transformer needs? We’ll work with you to determine the best custom transformer design to meet your specific needs.

The online links to other technical sites is another way Jefferson is working to provide you with the information you need. Email questions to our technical services department or call us at 1-800-892-3755 or 414-209-1620. To recommend a technical site to link to, or technical information you’d like to see here, we’d appreciate your feedback.

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Calculate your kVA

Use the calculating forms at right if you know your Load Voltage and Load Current

SINGLE PHASE

THREE PHASE