The RTS GATE-3 testing is an expanded option to our GATE-2 testing. This expanded testing includes additional Doble, Bump, and ELCID testing. The following testing will be performed during an GATE-3 generator test. This is included in a base bid:
Inspections/ Tests performed
Borescope inspection of stator winding, rotor winding and blocking (as accessible), stator core step laminations and fingerplates
Insulation resistance of RTD’s, stator winding, and rotor winding
Stator Winding Test – Polarization Index (PI), Resistance, DC step voltage test. ELCID, Wedge map
Rotor Winding Test – Polarization Index, Resistance, AC Impedance, RSO
Doble, Bump, and ELCID testing
Exciter inspection
Visual inspection
Insulation resistance tests
Final Report
Standardized format provided electronically (cd or electronic mail)
Photographs of critical areas in the stator winding, core, and rotor.
Dielectric absorption graph and analysis of insulation integrity
Summary of all insulation and winding resistance measurements taken.
Any anomalies reported immediately with the Final Report submitted within 10 days of inspection
Benefits
Reveals pending faults in winding of the rotor and stator.
Reveals deterioration of coil insulation caused by corona or end winding.
Reveals possible shorted core laminations
Reveals loose slot support system
Establishes a “base line” for evaluating future inspections and input for establishing planned major maintenance activities
Option – Electrical Isolation
RTS can also provide an estimate for the neutral and main leads disconnection prior to electrical testing and reconnect upon completion of testing.