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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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