standards / manuals / guidelines for small hydro development - AHEC

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4.2.2 Weekly / Monthly ChecksSl.No.Assembly Item Check Point Method Remark & RemedialMeasuresWeekly1. Collector ring Cleaning Accumulationof Dirt2. Brushes Sparking,Chatteringwear &clearance3. Brake Lining Air leakage,excessive wear4. Brake Track Clean liners &Oil Sludge/Moisture Trap5. Dc. Exciter CommutatorBrush GearVisual Clean compare, IRvalueSmoothen collectorsurface clean adjustbrush (5 to 8 mm for1000 R-hour)Visual Attend leakagesMore than 4 to 5 mmper 50 OPReduce application,speed & PR.Check air PR, CleanTrack, Change LiningVisual Clean Drain Trap &Clean Brake TrackCommutation Visual Brushes are not stickingin their boxes, rough orhigh spot oncommutator smoothsurface.Monthly1. Stator core Back of core Visual Adjust core packing ofjack screws, insertparamax paper2. Field wind Field coil top Visual FeelerGauge Visual3. DC Exciter Commutator,VisualBrush Gear,Air FilterClean Comp. AirReplace brushes, cleancom., Risers, clean withdetergent sol. Dry.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 37
4.2.3 Annual Inspection & MaintenanceSl.No.Assembly Item Check Point Method Remark & RemedialMeasures1. Stator (i) Frame Joint bolt Hammering Retighten, if Necessarytightness &Dowel Pins(ii) Core Tightness ofCheck Tightness ofCorecore specially at the top& bottom mostpackets. Any locallooseness betweenpunchings can be filledup with asbestos ofparamax paper gluedwith epoxy varnish &core bolts retightened.After repairs spray thetop & bottom threepackets (both from I.D.& O.D.) with loctite –290 Marketed By M/sFit Tite Chemicals Ltd.Core Duct Contamination Visual Clean with Drycompressed airStatorwinding2. Field winding Field coil &rotor3. Brushgear andSlipringsField coil &rotor leadsBrushes &SlipringsCleanliness &generalconditionGeneralcondition ofcoil, Pole &cleanlinessVisualMeasure IRvalues aftercleaningVisualInter turn faults Measureimpedance offield coils byapplying 60 to100 V AC, 50Hz supplyGeneral VisualConditions &CleanlinessClean the end windingsDryout if IR Value islowClean the field coilwith compressed airCheck the coil jointsfor any cracksoverheating etc.If impedance of somecoils is very low (sayless than 40%) theymust be checked forpossible inter-turnfaults.The slipring is runningout, Correct it, anygroves etc to beremoved by oil stonefor excessive sparkingAHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 38
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: 4.2.1 Daily ChecksSl.No.Assembly It
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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