how did the differential relay work to protect the power
transformer
- 4 Answers
- 9705 Views
- I also Faced
- E-Mail Answers
Answer Posted / 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 |
Post New Answer View All Answers
In case of HV test on medium voltage cables, BS is asking for 4 U0 where as IEC is asking for 3.5 U0. Can any one advise me how this 3.5 times or 4 times U0 is derived?
Why did lightening arrestor solid copper rod head is sharp on mobile tower top?
Why we use 4-20 mA Analog signal for the PLC input? Why not 0-20 mA? Why not 5-25 mA?
What is the technical difference between On delay timer and a Star delta timer?
What is meant by reactance voltage?
How to measure current and voltage in an ELV circuit
What are the causes for the failures of sandwich type (Al) busducts?
state the disadvantages of carbon filament???
What is the disadvantage in proportional controller?
What is boucholz relay and the significance of it in to the trformer?
when ID fan will immediately stop through VFD what exactly cause and problem the ID fan
What is the criteria for selecting the voltage classes of an AC Induction Motor.The KW rating above/below which ht/lt selection is made may be provided in details.
1600kva capacity Transformers how the bucholz relay,Oil temperature,winding,surge relay relays setting are to be done
difference between a diode and thyristor?
What is the selection process of breakers. Can any one please give a formulation on same?
