A surge of water flows through the turbines in the first full flow by-pass valve tests at the Ohau B powerhouse on the Upper Waitaki Power Development. Each of the four turbines at the powerhouse has a by-pass valve attached. These act as safety devices to pass water through the turbine strollcase without activating the turbine. A rapid shut-down of the machine (turbine and generator) does not create pressure in the penstocks because the valve opens and relieves the water when the machine shuts down.
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Press, 16 June 1983, Page 18
Word Count
85A surge of water flows through the turbines in the first full flow by-pass valve tests at the Ohau B powerhouse on the Upper Waitaki Power Development. Each of the four turbines at the powerhouse has a by-pass valve attached. These act as safety devices to pass water through the turbine strollcase without activating the turbine. A rapid shut-down of the machine (turbine and generator) does not create pressure in the penstocks because the valve opens and relieves the water when the machine shuts down. Press, 16 June 1983, Page 18
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