overspeed limit for hydro generators
overspeed limit for hydro generators
(OP)
For a pelton wheel hydro generator, what is the speed limit to be set on mechanical and electrical overspeed protection ? What is the applicable standard ?
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overspeed limit for hydro generators
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RE: overspeed limit for hydro generators
Are you talking a 6 inch one or a 6 foot one?
RE: overspeed limit for hydro generators
The machine is 25 MW, 14 pole, 428 RPM with a 60 ton generator rotor and 15 ton turbine pelton runner
RE: overspeed limit for hydro generators
The governor is expected to limit the speed rise on full load rejection to 110%. Hence, the trip setting for overspeed can be set to 110%, I think. Electrical overspeed setting is normally kept a little lower than the mechanical overspeed setting, say 108%, normally.
RE: overspeed limit for hydro generators