This Technical Specification covers the activities necessary to ensure the satisfactory rewinding and refurbishment of all types and sizes of rotating electrical machines covered by IEC 60034, including: • determining cause of failure, where necessary; • determining the extent of refurbishment, as applicable; • defining revised performance, operating and ambient conditions, if required; • reviewing the original design, and undertaking redesign, if required; • proving the quality and performance of the refurbished machine. This specification does not supersede the requirements prescribed in IEC 60079-19 or elsewhere concerning the repair and overhaul for machines used in explosive atmospheres. Machines for special applications such as hermetic, submersible, nuclear, military, aviation or rail borne may have additional requirements which should be the subject of agreement between the refurbisher and user.