Technical brochure
TB 915 WG A1.59

Survey on industry practices and effects associated with the cutting out of stator coils in hydrogenerators

Operation of hydrogenerators with cut out faulted coils is a common practice in the industry, this is often done within acceptable limits of voltage unbalance. The purpose of this brochure was to explore and document industry experience on cutting out of faulted stators coils including the cause of the faults, techniques to locate the fault in the windings, considerations for repair methodology chosen and effects or encountered problems of cut out coils.

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Rotating electrical machines

This Technical Brochure has been created by a Working Group from the CIGRE Rotating electrical machines Study Committee which is one of CIGRE's 16 domains of work.
The SC is focused on the development of new technologies and the international exchange of information and knowledge in the field of rotating electrical machines, to add value to this information and knowledge by means of synthesizing state-of-the-art practices and developing guidelines and recommendations.

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