standards / manuals / guidelines for small hydro development - AHEC

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Sl. No. Description Periodicity Remarksused till it is notpossible to measure/adjust spring tension.3.06 Check for absence of oil or its vapours Every shift. Oil leakages, if any, toslipring area.be removed.3.07 Check distance of brush holder from slipring Monthlyand keep it as specified in the drawing.3.08 New brushes to be used after bedding the While replacingbrushes. The brush should not be tootight/loose inside the holder.3.09 Ensure use of same & recommended grade ofcarbon brushes on one machine.3.10 Check all fasteners of sliprings, brush rocker Once in 3& current carrying lead.3.11 Check carbon brushes for absence ofspittings and severe wear & tear.monthsMonthlyIn case the damage isexcessive, replacecomplete set.3.12 Inter change polarity of sliprings. Half yearly3.13 Carryout thorough cleaning of slipring area. Half yearlyStop oil leakages in this area.3.14 In case the original insulating enamel unit ispeeling off remove the balance enamel andapply fresh enamel.yearlyWhile cleaning avoidusing insulating paintremovers.3.15 Check wobbling at slip rings. At the time ofinstallation/during majoroverhauling4.00 Thrust Bearing4.01 Measurement of temperatures of T.B. Pad & HourlyOil by RTD & TSD and record on log sheet.4.02 Check & record reading of oil level relay. Once in a shift4.03 Analysis of oil from oil bath. Half yearly Record to be kept.4.04 Change of oil in T.B. oil bath Whencentrifugingdoesn’t help in4.05 Check level of oil from the gauge glass. Anyincrease in level may be due to leakage ofwater in the oil bath coolers.improving itsquality up toacceptablevalues.Once in everyshift.Unit should bestopped in case ofleakage from coolingtube, plugging ofcooling tubes upto10% can be donedepending uponbearing temperature.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 29
Sl. No. Description Periodicity Remarks4.06 Measures insulation resistance of T.B. disc. Yearly4.07 Check calibration of the TSD’s & RTD’s of Yearlythrust bearing.4.08 Check the working surface of thrust bearing Yearlypads, scrapping, if required, should be carriedout with respect to T.B. disc after apply lard(animal fat) on the pads & giving rotation tothe unit. Load sharing on T.B. pads and theverticality of the unit is to be checkedthereafter.4.09 Check the condition of mirror surface of T.B. During capitalDisc. Polishing of the surface can be done to maintenanceremove minor scratches.unit.4.10 Clean all inner surfaces of oil bath from dust, Once in Twowash them with Kerosene and dry with clean years.cloth.4.11 Check the condition of weld seam of oil bath Yearly& oil pipe lines for leakages visually.4.12 Check the condition of insulation of RTD Yearlyleads.4.13 Check if excessive foaming is taking place As requiredon oil through gauge glass. This is normallydue to mixing of water leaking from oilcoolers. If oil level is not rising, the oil mayneed a defoment. Oil sample to be checked.4.14 Check if any insulating segment over T.B. During capitalDisc is displaced.maintenance4.15 Check (in case of problem) the intactness of As perspherical surface of thrust bolt.requirement.4.16 In case of uneven wear of pad, check that the As perpad eccentricity is correct.requirement.4.17 Check for proper seating of pads As required4.18 Change rubber seals & woolen felts As required5.00 GUIDE BEARINGSThis will requirepartial dismantling ofOil bath is to befinally flushed withfresh turbine oil; to bediscarded after use.Watch carefully forrise in water level toconfirm leakage andattend accordingly.5.01 Measurement of temperatures of G.B. pads, Hourlyoil by RTD & TSD & record on log sheets5.02 Check & note reading of level relay Once in everyshift5.03 Analysis of oil from oil bath Once in 3months5.04 Change of oil in T.B. oil bath Whencentrifugingdoesn’t help inimproving itsquality up toRecord to be kept.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 30
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: Sl. No. Description Periodicity Rem
Page 37 and 38: Sl. No. Description Periodicity Rem
Page 39 and 40: 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 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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