Figure 4 — Comparison of Turbine Reactive Effciency and Turbine Servomotor Stroke
This fgure compares turbine reactive effciency and turbine servomotor stroke measured during index testing.
Servomotor Stroke (in mm)
60 80 100 120 140 160 180 200 220 240 260
Gartshore Generating Station Pre-Upgrade UICMS Index Tests
Comparisons between Index and UICMS Tests for Cam Profle
Relative Overall Effciency vs Servomotor Stroke (Gross Head 34. 4 m)
21. 75 Degrees
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opening dimensions (width and height) were
measured and verifed. In addition, hoist
supports were installed and it was verifed
that the current meters could be lowered to
the bottom of the intake opening.
At this point, the test control center was
set up with computers, data acquisitioning,
signal cables, and communications between
each measuring point and the computer center.
Te next step was to install the servomotor stroke, wicket gate angle and runner
blade angle measurement instrumentation, then calibrate the instruments and
At this point, the contractor installed the
power meter measurement instrument and
Temporary stilling wells were installed
to measure the static water level of the
generating unit headwater and tailwater
elevations. Tese stilling wells were made of
2-inch-diameter aluminum pipes that were
open at the top and capped on the bottom,
with a 3/16-inch-diameter hole to minimize
water level variations caused by turbulence.
Te wells were fxed to the concrete wall and
temporary benchmarks were established on
the top of each well. One stilling well was
installed in each intake, while two stilling wells