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TC spring energy-storage operator for turbines
  TC spring energy-storage operator works as follows: the mechanical energy is stored when the wicket gate opens, and the wicket gate can be safely closed by releasing the mechanical energy from the spring, in case there is no plant-service power. For emergency stop, it can quickly and safely close the wicket gate by two steps, firstly to close quickly the wicket gate by about 90%, and then slowly close down. It's a very reliable operator with low-cost, no oil pump needed, salient energy conservation, simple structure, and low cost of maintenance. TC spring energy-storage turbine operator is suitable for small hydropower stations integrated into the power grid and there is no need for frequency regulation.

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