Overcurrent vs. Differential for Line Protection

[@enriqueh8847]

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.

[@heroengineeringacademy]

Hi, the difference is mainly that 67N is with directional component. Can you explain in detail your question regarding the YNd11 transformer? KIND regards!

[@simarmata_markusraja]

Thanks a lot my brother.🙏🏾

[@ibang3586]

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?

[@electricalengineeringacade5770]

We always respect 250 ms till 300 ms. Otherwise the relay will kill it and not fall back. Even digital relays have to be treated like that. No chance otherwise. Warm wishes!

[@surendrakverma555]

Very good. Thanks 🙏🙏🙏🙏

[@electricalengineeringacade5770]

Thank you for your feedback!

[@muhammedabdulkareem1974]

Nice

[@electricalengineeringacade5770]

Thank you for your feedback!

[@jcubas9576]

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

[@MoLoToVo]

Love it

[@heroengineeringacademy]

Thank you!