why we use REF and Differential Protection in one
transformers?my doubt is both protections are operated in
internal fault only.why we want to use 2 protections?please
clarify.
Answer Posted / gunasekaran
at internal earth fault condition diffrentional sensitive
only 85% only remaining 15% covered by REF protection
Is This Answer Correct ? | 1 Yes | 8 No |
Post New Answer View All Answers
Brushes are placed at magnetically neutral axis,when brushes reach that point,the armature conductor gets shorted,but it can be seen that the dc supply is also shorted,wont that get damage? help me plz
How to calculate the current of Highpressure Mercury Vapour Lamp?what is the basis?whether we have to consider power factor or not?
I am an American living in Vietnam and I have recently gotten a refrigerator from Japan and it is rated for 100 vac, but the power here is 220 so I bought a voltage stabilizer it has a 1 kva output rating. Can you please tell me what the amperage is? I'm confused and without a working fridge.
When the relative speed between the magnetic fields of stator and rotor does is zero under steady state operation?
How to run a three phase motor into single phase........
Why do we avoid electrical conduits in floors at apartments?
please send me the previous year's question papers of jindal GET exams
After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.
What are the application of filter?
What is the normal phase difference between the voltage and the no-load current in a transformer?
what is the advantage of connecting capacitors in delta than in star?
i need some project topics along with circuit diagram in the electrical adnd electronics engg and also give ome website regarding projects.my mail id is thenmozhi2k7@gmail.com .please help me.
what is the relation between knowing of the distance between power transformer and the capacitor feeder in case of parallel operation
What is the lockout relay
what is different between phase and netural