To prevent the mal operation of a differentially connected
relay while energizing a transformer, the relay restraining
coil is baised with
(a)second harmonic current
(b)fifth harmonic current
(c)third harmonic current
(d)seventh harmonic current
- 2 Answers
- 6902 Views
- I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
b) fifth harmonic
| Is This Answer Correct ? | 4 Yes | 2 No |
Post New Answer View All Answers
Why induction motor is widely used in industry
Hi,I am working in abroad for more than 3 years in a company operating with 11kv and 6.4 MW power. I need c licence in India,can I? some other says only i can get if i work for 2 years in india only! anybody kindly clarify by doubt.Thanks
what is the voltage rating of chiller unit sensors
1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?
please explain to me how to calculate current,voltage,resistance with formula??
what shall be no load voltage of 132/33 kV transformer ? is it 33 kv of 34.5 kV
can anyone explain the star-delta motor control wiring ,which wire go where and how they operate?
how do you test tachos and servos
sir i have cleared the apti test of EIL held on 15th march and my interview will be in new delhi on 2nd june.i will be very much helpful if u help me regarding the type of interview questions comes at EIL.(URGENT.........PLZZZZZZZZZZ...............)
Can u tell me design of switch yard
How can find thermal state value in relay for calculate thermal overload.
If a high resistance fault occurs,then what are the changes will happen in the system?
why we use sinosidal voltage / current instead of others in system?
Why do we require transformer with less specific weight if supply frequency is increased?
How can we convert 11 kv to 440 volt without using transformer ?
