SGP408 Harmonic Restraint Differential Relay

[@kuntalkarmakar8318]

I have seen numerous videos but nobody explained this much detailed . Thanks to you sir. Please upload more and more videos.

[@patakotisrinivas1918]

Excellent explanation sir..thanks a lot sir..

[@akashkumar-qb6wj]

Thanks a lot for providing lectures related to electric

[@surendrakverma555]

Excellent lecture Sir. Thanks 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

[@nababmomin2757]

thnk you sir for such a nice explanation. nowhere this topic was covered. will you upload numerical protection too?

[@subramaniamchandrasekar1397]

Thank you for the video. Is the same type of protection apply to type "K" transformers, which are designed for higher harmonic load? Best Regards.

[@jamesowusu-ansah595]

please if I get you right, you mean that the restraining coil receives rectified current containing both the fundamental component and all the harmonics (both from the spill current and circulating current) but the operating coil only has the rectified fundamental component. But this relay connection would create a problem when there's an internal fault involving harmonics due to arc or saturation of CT, since, the relay would restrain in that condition so to solve this, we rather provide the operating coil with the rectified fundamental component and to the restraining coil we provide the fundamental and all the harmonics from the circulating current plus the second harmonic component from the spill current is this right?

[@circuitgyan]

Very well articulated sir. Sir, I1 and I2 are the CTs secondaries current or Primary current ?

[@biswaljayanti665]

Nice explanation

[@ankitjha6871]

Sir why to use restrain method to control inrush current in power transformer over NTC thermistor… by the way i am from Nepal sir

[@talalomer349]

Thank you sir 🌹🌹 I'd like to ask what is normal values of second and fifth harmonics without faults and under faults conditions also

[@talalomer349]

@@lecturesinelectricaleng That's mean practicaly harmonics apear with small values under normal and fualts conditions

[@himanshu2232]

Thank u sir

[@SanaktaMisra]

sir, please check your inbox I have sent you some files regarding this course