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7/27/2019 Brush less Excitation System
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BRUSHLESS EXCITATION
SYSTEM
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MAIN EXCITER
Rotor Stator
Magnetic polesSlip rings for ground fault detectionBearing housing
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GROUND FAULT DETECTION
This system consists of two slip rings mounted onthe main shaft for high resistance and lowresistance ground fault.
o If fault is of low intensity and resistancedetected by slip ring is
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PILOT EXCITER
1. Stator 2. Permanent magnet rotor 3.
Stator winding
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RECTIFIER WHEELS
1. Rectifier wheel2. Three phase lead3.
Heat sink4. Diode5. Fuse
6. Multikontact plug
in-bolt
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FIELD FORCING
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