standards / manuals / guidelines for small hydro development - AHEC

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Sl.No.Assembly Item Check Point Method Remark & RemedialMeasures4. DC exciter Core & Accumulation Visual For cleaning the exciterWinding of dustNote: For cleaning stator ducts, stator winding, field coils, rotor leads, brushgear, PMG andDC Exciter, Use cleaning agents as recommended by manufacturer5. Bearings Top &BottomGuideBearingPadsClearance Feeler Gauge Check guide bearingpad clearance. If padclearance have to bereset the shaft must becentered first.Examine the conditionof guide pads and anyslight scouring markscan be attended bywater emery paper6. Air coolers Coolerstubes7. Oil coolers Coolerstubes8. HS Lub.SystemHS LubMotor HPHoseAssembly9. PMG Air gapwinding10. Shaft runout &centering &rotor level11. Water flowrelays, visualGeneralcondition &cleanliness(GR-400)Clean inside andoutside of air coolertubesChecks for any tubeleakage by pressurizingto a pressure slightlymore than maximumexpected workingpressure.Clean inside & outsideof oilCheck for any tubeleakage by pressurizingto a pressure slightlymore than maximumexpected workingpressure.Inspect bearing &Grease, if necessarycheck the condition ofthe hoses & ifnecessary replace them.Check air gapClean the stator & fieldwindings check theopen circuit voltageand if less than 100 VremagnetiseReadjustment,necessaryAHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 39ifImpact, clean waterpassages, if necessary
Sl.No.Assembly Item Check Point Method Remark & RemedialMeasuresflow indicatorsto remove silt etc.& flow meters12. Oil levelClean rod probeindicator13. Braking & • CombinatClean the filter elementJacking system ory unitand bowl of filter,and airsimilarly clean thesupplybowl of lubricator also,pipe line,cessation of oildripping through thatsight glass is anindication that cleaningis done• BraketrackfixingTightness of Dogclamps• BrakelimitswitchProper Operation &Cleaning14. Thrust & topguide bearing15. ElectricalConnectionsBearingOil vapourseal of topbearingPole to poleconnectionsBearinginsulationVapour sealinsulationElectricalJointsIR valueIR valueTightnessCheck IR value ofbearingInsulation & replaeinsulation if damaged.Check IR value ofvapour seal insulationand replace, ifdamagedTighten all electricaljointsBrushgearconnectionRTDterminalheaterterminalconnectionTighten all electricaljoints.16. Brushgear Cleaning Insulated parts Visual Clean the insulatedparts by compressed air17. Rotor Tightening Looseness of Visual Tighten all theassembly of fasteners fastenersapproachable fasters onrotor assemblyincluding tighteningpole and rim keys &lock all of them.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 40
Page 1 and 2: STANDARDS / MANUALS / GUIDELINES FO
Page 3 and 4: ITEMSPAGE NO4.2 Preventive Maintena
Page 5 and 6: SECTION - IGUIDELINES FOR OPERATION
Page 7 and 8: 2.1.2 Lake/Storage/PondThe operatio
Page 9 and 10: 2.2.3 Electrical• Air seal valve
Page 11 and 12: • Start command initiated(iv)Sync
Page 13 and 14: ‣ Check whether supply to various
Page 15 and 16: - Intake gates, bye pass gates, D.T
Page 17 and 18: • To arrange for evacuation of ma
Page 19 and 20: SECTION - IIGUIDELINES FOR MAINTENA
Page 21 and 22: 2.3 PREDICTIVE MAINTENANCEThis sort
Page 23 and 24: 6. Oil Leakage Unit:i) Check any le
Page 25 and 26: 5. Shaft Gland Seal and Air Seal:i)
Page 27 and 28: v) In case the runner is found to b
Page 29 and 30: iii) Preheating of the blade to abo
Page 31 and 32: E. GovernorDifferent types of gover
Page 33 and 34: Sl. No. Description Periodicity Rem
Page 41 and 42: 4.2.1 Daily ChecksSl.No.Assembly It
Page 43: 4.2.3 Annual Inspection & Maintenan
Page 47 and 48: • Check all joints, tightness of
Page 49 and 50: S.No.Item to beinspectedInspection
Page 57 and 58: 4.4 PREVANTIVE MAINTENANCE OF HYDRO
Page 59 and 60: Spherical valves (for heads more th
Page 61 and 62: • Check rotor level, verticality
Page 63 and 64: • Any possible inbalance of runne
Page 65 and 66: The blades are set to the no-load p
Page 67 and 68: IV.Rotational Checks‣ Arrangement
Page 69 and 70: Fig 6: Resultant Method of Throw Ca
Page 71 and 72: Fig 9: checking Verticality of Gene
Page 73 and 74: oFig 11: Checking Balancing of Gene
Page 75 and 76: Procedure for preliminary alignment
Page 77 and 78: Fig 14: Determining Displacements o
Page 79 and 80: SECTION-IIIGENERAL GUIDE LINES1.0 G
Page 81 and 82: • On placing them on operation du
Page 83 and 84: Safety Precautions and Practices in
Page 85 and 86: Results of test and measurements ca
Page 87 and 88: (NAME OF POWER STATION)DAILY GENERA
Page 89 and 90: (NAME OF POWER STATION)DAILY TRIPPI
Page 91 and 92: UnitGENERATION(MU)TOTALTIME(Hrs:Min
Page 93 and 94: MONTHLY TRIPPING REPORTFOR THE MONT
Page 95 and 96:
AHEC/MNRE/SHP Standards/ E&M Works
Page 97 and 98:
(POWER STATION)ANNUAL MAINTENANCE S
Page 99 and 100:
UNIT/ EQUIPMENT/ FEEDER BAY/:DATE &
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