standards / manuals / guidelines for small hydro development - AHEC

Positionof DialGaugeNo. ofPointatShaftUGBaLGBcTable – 1RESULTANT METHOD OF ALIGNMENT(ACTUAL EXAMPLE OF UNIT-I OF A POWER STATION)(VECTORIAL RESULTANT – AT FIG. 6)Upstream Side Dial GaugeFlangeeDial Gauge was notfixedTGBg c-a c-a g-aDial Gauge was notfixedUGBbLGBdDial Gauge was notfixedDown Stream Side Dial GaugeFlange TGBf h d-b f-b h-b0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 245 0 1 + ½ – 32 – 46 – 31.5 – 45.5 0+ 1 + 1 + 1 + 1 390 0 2 0 – 40 – 85 – 40 – 85 + 3½ + 3 + 30 – ½ + 26½ 4135 0 3 0 – 40 – 86 – 40 – 86 + 6½ + 13 + 31 + 6½ + 24½ 5180 0 4 0 – 30 – 65 – 30 – 65 + 7 + 28 + 71 + 21 + 64 6225 0 5 + 1 – 8 – 22 – 9 – 23 + 7 + 41 + 80 + 34 + 73 7270 0 6 – ½ + 15 + 26 + 15½ + 26½ + 7 + 30 + 76 + 23 + 69 8315 0 7 0 + 6 + 17 + 6 + 17 + 3 + 18 + 51 + 15 + 48 1360 0 8 – 1 + 4 + 14 + 5 + 15 + 1 – 6 – 1 – 7 – 2 2Dial Gauge was notfixedNo. ofPointatShaftNote: (a)(b)The readings of upstream side dial gauges are not acceptable as closing error is more.Unit-II side readings are fine because (i) closing error is negligible (ii) curve plotted along X-Y axis is nearer to sine curve (iii)these are confirmed in subsequent rotation also. Further calculations and correction is based on these.AHEC/MNRE/SHP Standards/ E&M Works – Guidelines for Operation and Maintenance of Small Hydropower Station 63