Que. | damper bars in case of sailent old rotors of hydro alternators are usually inserted in pole faces to |
- A. strengthen the excitation current of the poles
- B. damp the rotor oscillations during transist state owing to sudden change in load conditions
- C. help improve the power factor of load
- D. reduce the no load current when load is thrown off
Right Answer is :
✓ B. damp the rotor oscillations during transist state owing to sudden change in load conditions