SGP404 Combined Leakage and Phase Fault Protection of Transformers

[@surendrakverma555]

Very good 🙏🙏🙏🙏🙏🙏🙏🙏

[@jyothishkv]

Sir,if there is an overload in the phase where resistor (phase Y in over current relay section) is connected which relay will trip?

[@avinashmeena6540]

haaiaal 😄😄

[@thabomecwi6867]

What is the function of the current limiting resistor and what will happen if we don't put it there

[@balasasthabeee]

Hi sir ,In this type how we can check which phase having over current? because there is no CT in Y phase .

[@thabomecwi6867]

So is it true that y phase is not protected against overload and if so why

[@vivekanandadhar7056]

Why we insert resistance in middle phase?

[@ujjawalgautam3747]

Sir using overcurrent and restricted earth fault protection lec 9 we can protect transformer against earth fault as well as phase to phase fault . Then why we use it??

[@ujjawalgautam3747]

@@lecturesinelectricaleng Sir overcurrent and unrestricted fault protection which is used to protect against phase to phase fault and earth fault like winding to core fault. Here this relay is also used for same purpose. So why we use both??

[@ujjawalgautam3747]

@@lecturesinelectricaleng Thanks sir

[@mohammedalshaqsi5653]

it is suitable or unsuitable for unbalanced protection ??

[@mohammedalshaqsi5653]

@@lecturesinelectricaleng Mr Please explain why it is not suitable ?

[@amsaid9169]

Dr Can change primary to star And seconday to delta in this case????!

[@amsaid9169]

@@lecturesinelectricaleng also, the three relay should not same?

[@vivekanandadhar7056]

If overloading occur only in phase B how it will operate in balancing overload system?

[@vivekanandadhar7056]

Sorry if overloading occur in Y phase(middle phase) how the relay will operate?

[@vivekanandadhar7056]

Please ignore B phase ,I'm asking about Y phase(middle phase).

[@dhananjaykumar5114]

If overloading in phase B occurs then how relay operate?

[@vivekanandadhar7056]

@@lecturesinelectricaleng ,the answer is not clear to me,pl. Explain.