26
·
Power O&M Bulletin No. 19 -
Maintenance Schedules and Records
·
IEEE Std. 432-1992, Guide for Insulation Maintenance for Rotating Electric
Machinery (5 hp to 10,000 hp).
Machinery (5 hp to 10,000 hp).
·
IEEE Std. 95-1997, Recommended Practice for Insulation Testing of Large
AC Rotating Machinery with High Direct Voltage
AC Rotating Machinery with High Direct Voltage
·
Conditions Rating Procedures/Condition Indicator for Hydropower Equipment,
U.S. Army Corps of Engineers
U.S. Army Corps of Engineers
·
Handbook to Assess the Insulation Condition of Large Rotating Machines,
Volume 16, Electric Power Research Institute (EPRI)
Volume 16, Electric Power Research Institute (EPRI)
·
Electric Generators, Power Plant Electrical Reference Series, Volume 1, EPRI
·
Inspection of Large Synchronous Machines, I. Kerszenbaum
·
Test Procedure for Synchronous Machines, IEEE 115-1983
·
Guide for Operation and Maintenance of Hydrogenerators, IEEE Std. 492-1974
Maintenance or Test
Recommended Interval
Preventive maintenance and inspections
No standard recommended interval. Machine
specific PM according to site operating
conditions. Also, see Appendix B.
specific PM according to site operating
conditions. Also, see Appendix B.
Stator winding - physical inspection
During 1-, 2½-, and 5-year warranty inspections;
thereafter, during major maintenance outages
but not to exceed 5 years.
thereafter, during major maintenance outages
but not to exceed 5 years.
Stator winding - high voltage DC ramp test
3 to 5 years and after prolonged maintenance
outage.
outage.
Stator winding - insulation resistance
polarization index (
polarization index (
megohmmeter)
Performed in lieu of HVDC ramp test
Stator winding - AC high potential test
At factory and as an acceptance test. Non-
routine thereafter but may be used to verify
insulation integrity before and/or after stator
winding repair.
routine thereafter but may be used to verify
insulation integrity before and/or after stator
winding repair.
Stator winding - partial discharge
measurements (corona probe/scope)
measurements (corona probe/scope)
Benchmarked within first 5 years of operation
then annually thereafter. Three- to six-month
intervals if deterioration detected.
then annually thereafter. Three- to six-month
intervals if deterioration detected.
Stator winding - black out test
Nonroutine. Performed when deterioration is
suspected.
suspected.
Stator winding - ozone measurement
Nonroutine. Performed when deterioration
detected.
detected.