Project owner First Hydro Co. has awarded a contract to CEGELEC of Rugby, England, to refurbish the DC excitation system of a generator at the 360-MW Ffestiniog pumped-storage project in Wales.
Work is to include rewind of armature and main field windings, and refurbishment of the field frame. The contract contains an option to re-core the armature depending on existing conditions.
CEGELEC also holds contractual options to refurbish the excitation systems for three other units between now and 2009, Martin Kane, First Hydro’s procurement manager, said.
First Hydro invited tenders from seven companies for refurbishment of up to four DC exciters mounted on the shaft of a generator-motor. Each exciter is an eight-pole, 135-volt, 165-kW machine running at 428 rpm.