how did the differential relay work to protect the power
transformer
Answers were Sorted based on User's Feedback
Answer / vishal
differential relay operates when the phasor difference of two or more electrical quty exceeds a pre determined limit.
in case of power transformers the vectors compared are the current entering and leaving the winding
..if the current entering is more ,indication of fault and relay operates
Is This Answer Correct ? | 13 Yes | 1 No |
Answer / vasim
CT connections from primary side & secondary side are
connected together in the differential relay if there is
any difference current or fault current flows there above
the preset time & value of current than the relay operates.
Is This Answer Correct ? | 5 Yes | 1 No |
Answer / ashutosh
in differential relay we use to the differential principle
means in it we compare to the similar actuating Quantity.
Differential relays are used to determine the inter turn
Fault
Is This Answer Correct ? | 4 Yes | 6 No |
Differential relay will operate with differential current between phase and neautral of the generator. it is operated with CT CONNECTIONS
Is This Answer Correct ? | 2 Yes | 7 No |
how step down and step up voltage is occured in transformer
What is the function of electron gun used in crt?
What is class ab operation?
on 22.03.2015 at 17:15hrs Y phase 66kV class Power Trf-2 Current transformer has flashed over and oil came out. The failed CT has been replaced on 24.03.2015 at 13:15hrs and the Trf has been charged in presence of RT Hassan after conducting the pre-commissioning tests. On the same day at 17:00hrs the commissioned CT has again flashed over and immediately the Trf has been isolated from power supply. It is confirmed the secondary is not opened and checked the earth integrity and is found ok. Here what would be the reason for the CT failure?
I have seen 1 video in which a person getting shock while standing at top of a train,i have 1 question? why the people sitting in the train doesn't get shock while that man getting shock from top of the train? How the earthing of train works?
what time should we set to come on star contacter in stardelta starter?and for what reason we hav to set such time delay range?
Classical power system stability was mainly focussed on rotor angle stability but modern power system stability has more focus on voltage stability.Why?
Can u Explain about the electronic trivector meter and the use of data converters in them?
What is a roll of adopter panel in terms of h.t. Panel ???
What is the function of PMG in DG sets & how it works??????????
how much GROUND & NEUTRAL VOLT maintain in data center.
Why we oil in tranformer/