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  • White Paper

Defined Life Thermal Aging Evaluation of Electrical Insulation Systems

Close up of electrical insulation systems

This UL white paper discusses defined life thermal aging (DLTA) evaluations under IEC 61857-31, Electrical Insulation Systems – Procedures for Thermal Evaluation – Part 31: Applications with a designed life of 5000 hours or less, and the potential benefits of this approach for EIS manufacturers. The paper also provides information on UL’s EIS component recognition program employing the use of DLTA.

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