generator assessment process - level 3
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GAPGAPGAPGAPGAPGAPGAPGAP33333333generator assessment processgenerator assessment processgenerator assessment processgenerator assessment process
a solution to life assessment of large generators
[email protected]@gmail.com
GAPGAPGAPGAP1111 GAPGAPGAPGAP2222
GAPGAPGAPGAP****
GAPGAPGAPGAP4444 GAPGAPGAPGAP3333
GAPGAPGAPGAP****
GAPGAPGAPGAP3333 is the inspective approach toGAPGAPGAPGAP is the inspective approach to
assess the residual life of machines
MethodologyMethodologyMethodologyMethodology
The methodology employed isconducting standard and specialelectrical tests and inspection on statorand rotor windings and accessories
UnitUnitUnitUnit ConditionConditionConditionCondition
The machine is in assembled condition withaccess covers and top half of end bracketsremoved
InspectionInspectionInspectionInspection &&&& teststeststeststests PerformedPerformedPerformedPerformed
Stator windingStator winding
Electrical tests as done in MAP2
Visual and borescope inspection of statorwinding, stator core laminations andfingerplates (as accessible)
Core tightness test (visual indications oflooseness)
InspectionInspectionInspectionInspection &&&& teststeststeststests PerformedPerformedPerformedPerformed
Corona tests, as accessible, to determineareas and severity of any corona activity
DC step voltage test to determine insulationintegrity
End winding basket frequency checkEnd winding basket frequency check
Rotor winding
Electrical tests as done in MAP2
Visual and borescope inspection of rotorwinding and blocking (as accessible)
Exciter and Accessories
Electrical tests as done in MAP2
BenefitsBenefitsBenefitsBenefits
Reveals pending faults in winding
Reveals deterioration of coil insulation bycorona or end winding vibration
Establish a base line for evaluating futureinspectioninspection
Accurately assess life and future maintenancerequirements
Record of core tightness
Preventive maintenance plan
Schedule for GAP2222, GAP3333 and GAP4444
FinalFinalFinalFinal ReportReportReportReport
Standard format provided electronically
Photographs of critical areas
Location and levels of corona activity
Plots showing frequency distribution ofPlots showing frequency distribution ofend winding basket
Core tightness record
Schedule for MAP4
ExpectedExpectedExpectedExpected DowntimeDowntimeDowntimeDowntime
5-7 days
Condition AssessmentRisk Assessment Approach
Condition AssessmentStator
Operation & Maintenance History
Physical Inspection
Insulation Test
Generator Age
DC Ramped Voltage Test
Partial Discharge Measurement
Dissipation Factor Measurement
Ozone Monitoring
Black Out TestBlack Out Test
High Potential Withstand Test
Stator Core Inspection
Wedge Tightness Evaluation
Core Loop Test
ELCID Test
Corona Probe Test
Coupling Resistance Test
Bump test
Capacitance MeasurementCapacitance Measurement
Core Bolt Insulation Resistance
Winding Conductor Resistance Measurement
Impedance Measurement
Winding Dissection
10987654321
Stator Condition Index
10987654321
10740
Stator Data Quality Index
10740
Condition AssessmentRotor
Operation & Maintenance History
Physical Inspection
Insulation Test
Generator Age
High Potential Withstand Test
Rotor Core Inspection
AC Pole Drop Test
AC Impedance Test
Winding Resistance Measurement
RSO Test
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Rotor Condition Index
10987654321
10740
Rotor Data Quality Index
10740
Condition AssessmentGenerators
10987654321
Generator Condition Index
10987654321
10740
Generator Data Quality Index
10740
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