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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Power generation and electromechanical energy conversion

This Technical Brochure has been created by a Working Group from the CIGRE Power generation and electromechanical energy conversion Study Committee which is one of CIGRE's 16 domains of work.
The SC covers all aspects of electromechanical energy conversion equipment, rotating electrical machines for power generation, grid support, and energy conversion within industrial applications. This includes research, development, design, manufacture and testing of power generation and electromechanical energy conversion equipment and their associated auxiliaries, commissioning, operation, condition assessment, maintenance, life extension, refurbishment, upgrades, efficiency improvement, conversion, storage and de-commissioning.

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