standards / manuals / guidelines for small hydro development - AHEC

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Sl. No. Description Periodicity Remarksfrom rated speed after signaling the unitincreased abnormalto stop.then look forincreased guide vanesclearances. Presenceof oil on brake trackor reduction in airpressure, defectivegauge etc.8.04 Check if excessive brake dust is generated Yearly Clean the affectedand find its cause.areas periodically as8.05 During jacking operation lifting of the rotoris to be limited to the specified value (7.0mm)8.06 Keep the unit on jacks which aremechanically locked during each shut-downof the unit8.07 After each jacking operation ensure cleaningof pipe with air under pressure as provided inthe system.8.08 Check no oil leaks from return line duringjacking operation8.09 Check function of the braking system onmanual & auto and the operation of the limitswitches of brake. Check leakage throughpipelines during braking / jacking.8.10 Check all fasteners of brakes and brake pipelines & gaskets wherever provided.8.11 Check the condition of brake track and itsholding with the rotor.8.12 Open brake cum jack assembly. Clean theinner surface of dust with Kerosene &reassemble.9.00 GENERALDuring jackingAs requiredAs requiredAs requiredYearlyYearlyYearlyYearly9.01 External examination of parts of generator Once in eachwhich are accessible.shift9.02 External inspection of air coolers, oil coolers, Once in eachpipe lines, sealing & control etc. for leakages. shift9.03 Ensure cleanliness of all external accessible Once in eachparts of the generator & wipe with clean & shiftdry cloth.9.04 Check wobbling of the shaft at turbine Dailygenerator flange/ TGB.9.05 Blow with compressed air the internal MonthlyrequiredLimit switch to besuitably mounted tocheck the rotor lift.Record be maintained.In case of anyproblem brake panel& brakes are to bechecked & rectified asrequired.Replace the gasket, ifrequired.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 33
Sl. No. Description Periodicity Remarkssurface of the generator.9.06 External inspection of current carrying leads Monthly To be cleaned ifPMG, Bus Bars, Terminal Blocks, Panelsnecessaryedc.9.07 Check the condition of lighting inside the Monthlybarrel9.08 Check the recordings of lighting inside Dailyoriginal results.9.09 Check for proper cleaning of sliprings. As perrequirements9.10 Check the vibrations at TGB, UGB & LBG Yearlypredetermined points.9.11 Check connections of current carrying leads Yearly& cables. Tighten the bolts, if required, afterremoving the insulation.9.12 Check the calibration of Electrical measuringinstruments i.e. voltmeter, ammeter, Active/Reactive Power meter. Frequency meter, P.F.meter for Stator output, Voltmeter &Ammeter in Field winding circuit, energymeter etc.9.13 Check the Sensitivity & Stability ofGenerator Electrical Protection scheme.9.14 Check the working of Fire Extinguishing(CO 2 ) system without actually releasing theCO 2 ) gas on manual and on auto operation asper the instructions provided in O&M manualof the Fire Extinguishing System provided byits supplier.9.15 Check the characteristics of Static Excitationsystem in both auto & manual mode andsensitivity of various limits.10.00 OIL PIPE LINE/ EXTERNAL OILCOOLING SYSTEM (If applicable)10.01 Check oil pressure at the pump across thefilter & point of entry to the bearing.10.02 Check the operation of the electrical contactpressure gauge.10.03 Check temperature of bearings of the Pumpmotorset.YearlyYearlyYearlyAs specified inits O&Mmanual.Every shiftMonthlyDaily10.04 Check conditions of gland packing of the Monthlypump and see that air is not being suckedfrom here into the system.10.05 Completely clean the oil tank & T.B. oil bath YearlyReasons for varianceto be investigatedRecord is to bemaintained.This temp. is not toexceed the specifiedlimits. In case temp. isexcessive check iflubricating grease isfilled as required.These are holes inpipes which feed oilin between the pads.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 34
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 35 and 36: Sl. No. Description Periodicity Rem
Page 37: 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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