standards / manuals / guidelines for small hydro development - AHEC

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S.No.Item to beinspectedInspection ProcedureAction required ifunsatisfactory conditionindicatedApplicable fortransformersApplicableUATS, SSTS anddistributiontransformerswhen ticked √1 2 3 4 5and transformer/ reactortank. Top up oil.3. Oil level inbushings4. Pipe work andaccessories forleakage5. Relief ventdiaphragm6. Fans/ oil pumprunning7. Oil & coolingwater flow.C. Weekly1. Leakage ofwater into cooler2. Operatingsequence of oilpump and thecooler3. Operation ofanticondensationheater inmarshalling boxand OLTCmotor drivepanel.Check oil level fromthe oil gauge of thebushings in which oilremains separate fromthe tank oil.- If low, top up oil.Examine bushing for anyoil leakage.Check for oil leaks - If leakages are observed,tighten evenly the gasketjoints. Replace ‘O’ ringor washer suitably.Replace gasket ifneeded.Check for any crack - Replace if cracked /broken. If broken, ensurefrom other protectionsprovided that there is nofault inside thetransformer / reactor.Check that fans / oilpump are running asrequired.Check oil and waterflow indicators.Check by opening theend covers of thecooler.Change over from onecooler to the other.Checkcondensationare working.antiheaters- Check connections. Iffound defective correctthem.- Check opening of valvesif restricted flowobserved.- Plug the tube leaking.- Ensure proper changeover.- Set them right if notworkingAHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 45
S.No.Item to beinspectedInspection ProcedureAction required ifunsatisfactory conditionindicatedApplicable fortransformersApplicableUATS, SSTS anddistributiontransformerswhen ticked √1 2 3 4 5D. Monthly1. Dehydratingbreatheri) Check colour ofsilica gelii) Check oil level inthe oil cup andcontamination ofoil visually.- If more than half ofsilica gel has turnedpink, change by sparecharge. The old chargemay be reactivated foruse again.- Add oil, if required tomaintain oil level.Replace oil ifcontaminated.2. Maximumpointer of OTIand WTIiii) Check that airpassages are free.Record the maximumoil and windingtemperature readingsreached during themonth.- Ensure air passages arefree.- Check whether thereadings are withinpermissible limits.- Reset maximum pointerof OTI and WTI.3. Operation offansIn mixed cooling inONAN/ ONAF, iftemperature of oil hasbeen less than the fancontrol settingtemperatures, operatethe fans manually tocheck their running.E. Quarterly1. Bushings Visual inspection forcracks and dirtdeposits.2. Cooler fanbearing andcontrol, pumps3. External earthconnectionsCheck contacts,manual controlCheck all externalconnections fordiscoloration or hotjoints.- Ensure smooth runningof fans.- Clean dirt deposits. Ifcracks observed, crackedbushing should berectified / replaced.- Lubricate bearings.Replace worn outcontacts. Clean fans andadjust controls.- Tighten them if loose.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 46
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 and 44: 4.2.3 Annual Inspection & Maintenan
Page 45 and 46: Sl.No.Assembly Item Check Point Met
Page 47 and 48: • Check all joints, tightness of
Page 49: S.No.Item to beinspectedInspection
Page 53 and 54: S.No.Item to beinspectedInspection
Page 55 and 56: 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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