Hydro turbine driven generators are high speed machines with a running speed of 375 RPM to 1800 RPM. In the case of hydro turbine generators, the performance requirements will be unique to different projects depending on the grid conditions, water head availability and power house conditions. Generally, these machines are located in remote places where accessibility is very poor and due to such conditions, there is a requirement for highly reliable equipments. Further, where there are weak grid conditions, they would require generators to be specially designed for high inertia requirements to absorb frequent tripping and should further have a rugged design to transfer all the forces to foundation smoothly. The rotor assembly requires specialized design, assembly and balance to operate at high runaway speeds.
The generators are designed and manufactured for various types of hydro turbines, such as Kaplan turbines, Francis turbines and Pelton turbines. Each of these three turbines has different design requirements with respect to the generators. We supply generators for high axial thrust loads coming for Francis turbines with the turbine runner directly mounted on the generator, which is advantageous in terms of space and cost of the powerhouse. The Pelton wheel generators are subjected to high radial thrusts coming from water forces and results in special bearing designs.
We manufacture generators for: