END WINDING MONITORING SYSTEM

 

To assess the mechanical integrity of the Generator End Winding. The test is performed to determine the natural frequency of individual coils and phases.
Stator bars in slots are subjected to a certain electromagnetic force resulting from the interaction of the stator current and rotary magnetic field, as well as mechanical forces transmitted via the core and bearings at rotational speed which would make the bars into vibration. When the vibration frequency of the stator bars is equal to or close to 100Hz, the resonance of stator bars will occur. This resonance will cause a high amplitude of vibration. The vibration makes the bar loosen, fatigue cracking of conductors and abrades the slot conductive of insulation.

At the generator end windings, high vibration leads to rubbing between the two surfaces i.e. coil to coil or coil to support which results in serious damage to stator insulation which requires extensive out-of-service repairs.

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(456) 789 10 12

(456) 789 10 15

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Prognosys EMS(P) Ltd.,
1st floor, Subishi town center,
Mokila, Shankarpalle Road,
Hyderabad, Telangana – 501203.