Overcurrent vs. Differential for Line Protection

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Overcurrent vs. Differential for Line Protection

WELCOME dear friends of electrical protection and control engineering. In our new article we show you the advantages and disadvantages of overcurrent- and differential protection for the protection of line sections and explain some essential basics of protection engineering.

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  2. differential protection
  3. overcurrent
  4. overcurrent protection
  5. selectivity
  6. selective protection
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Комментарии
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Good Video. Please, is it possible to do comparison between 51N and 67N. In addition, one example in HV/MV power transformer but with YNd11 with earthing zigzag at MV side, is it possible?. In advance, thank you very much.

enriqueh
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Subtitles please for those of us who don't understand English fluently.

jcubas
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I do not get the explanation in English, so I do not get why so why relays have an extra time delay of 300 ms with respect to others. I understand that a relay needs approx. 30 ms to sense the fault and provide the signal + the approx. 60 ms that needs a circuit breaker to trip. But please, coulde you explain me why comes into consideration this 300 ms extra time delay for some relays that adds up to 900 ms extra time delay for the relays located near to the primary power supplies?

ibang