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Merz Price Differential Protection of Alternator. By Yuvi - Study Point

Hey everyone, today we are going to learn about Merz price differential protection of alternator.
So, without wasting any time lets get started.

  • Currents at the two ends of the protected section are compared in this scheme of differential protection of alternators.
  • under the normal operating conditions, these currents are equal. But when a fault occurs in the protected section these currents become unequal.
  • The most common system which is used for the protection of the stator winding faults employs circulating-current principle.
  • Phase to phase fault and phase to earth fault, these are the two types of faults which occur in an alternator stator. 
  • And through the operating coil of the relay, the difference of the currents under fault conditions is arranged to pass.
  • And after this, the relay closes its contact to isolate its protected section. Or we can say to isolate its healthy section from the faulty section.
  • And this form of protection is also known as Merz- price circulating current scheme. 
  • The most severe outcome of fault for an alternator is the damage of stator.

https://youtu.be/rzu8gOqYyhc

{ In this lecture video I have given the simple and brief explanation about Merz price differential protection of alternator.
Please go and check out this lecture video and my channel. }

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