A 460MW generator failed suddenly and without warning. The unit was running at full load (445MW) when a phase B to phase C fault occurred in the stator leads and the unit tripped off-line in approximately four cycles.
RTI performed a site investigation and inspection and provided a team of engineering metallurgists and electrical engineers to determine the cause of the failure.
The operational and maintenance history of the generator was reviewed and an industry data search was conducted. RTI performed extensive testing and conducted a thermal analysis to identify the cause of failure and provide loss prevention recommendations.