IEEE C57.138-1998

This recommended practice is to assist manufacturers of distribution transformers in the set-up and operation of a routine impulse test, and to assist users in understanding the routine impulse test and how it differs from design tests. This recommended practice for routine impulse testing of distribution transformers will assist manufacturers of distribution transformers in designing the facilities and performing the tests defined by subclause 10.4 of IEEE C57.12.90. New IEEE Standard - Superseded. General test procedures for performing routine quality control test that is suitable for high-volume, production line testing. Transformer connections, test methods, circuit configurations, and failure detection methods are addressed. This recommended practice covers liquid-immersed, single-and three-phase distribution transformers.