SEL Quality
At SEL, we take our commitment to quality very seriously, as demanded by the critical applications for the safe and reliable delivery of power to society. Our worldwide, ten-year product warranty not only reflects our commitment, but also demonstrates the quality and value we deliver. SEL is certified to the International Standards Organization (ISO) 9001:2008 Quality System Standard. This certification is evidence that our critical design, manufacturing, and business processes meet the exacting requirements of this internationally recognized ISO program. Additionally, our products meet or exceed both national and international testing standards.
We strive to exceed customer expectations in all aspects of product and service design, manufacture, and delivery. We define strategic objectives, operational improvement plans, and individual process improvement goals and action plans to serve as our road map for our journey of continual improvement.
- Customer Service and Warranty

SEL provides personalized service and ongoing technical support that our customers consistently rank best in the industry. The SEL ten-year, worldwide product warranty is proof of the confidence we have in the quality of products we manufacture while following the strictest industry standards.
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- Warranty Returns Improve Product Reliability

In the SEL product hospital, a root cause analysis of failure is performed on every returned device. If the customer observed failure cannot be repeated, the relay electronics are replaced with new components and shipped to the customer so that tests can continue to be performed on the defective components.
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- SEL is Setting the Standard for Testing

SEL works with customers, sales partners, and accreditation agencies to obtain the certifications necessary to provide relevant products to a variety of industries and markets around the world.
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- Quality is One of Our Most Important Values

At SEL, we take our commitment to quality very seriously, as demanded by the critical applications for the safe and reliable delivery of power to society. Our worldwide, ten-year warranty not only reflects our commitment to quality, but also demonstrates the quality and value we deliver.
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- SEL Manufacturing Video

In manufacturing, we differentiate ourselves through quality of our
products, customer service, delivery, and value. The idea of continuous
improvement of processes has been ingrained in all of us.
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- SEL Ranked #1 Relay Manufacturer by Electric Utilities

In an independent survey conducted by the Newton-Evans Research Company, utilities chose Schweitzer Engineering Laboratories, Inc. (SEL) as the #1 manufacturer in all eight categories: technology, price, features, security against hackers, technical service and support, web information, ease of use, and maintenance cost.
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