Interested to Buy Any Domain ? << Click Here >> for more details...
what is restircted earth fault relay,how it works? what is
diffrance btwn normal earth falut relay & restricted earth
fault relay?
- 1 Answers
- 5612 Views
- I also Faced
- E-Mail Answers
Answer Posted / javad ahamad
both e/f relays are different. consider an alternator, its
neutral is earthed through a
resistance inorder to limit earth fault current .then we
cant protect the 100% winding from
differential e/f relay only.because if an e/f occurs at
very near to neutral point the driving
current to operate relay will be very small. there for it
cant be sensed by this method,
we can protect up to 80%(approximate value.depent upon
resistance)only.at this situation
we r providing a restrcted e/f relay to protect the
remaining winding ie 20%.this relay
have very low current setting.by the combination of these
two we can protect 100% winding.
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
how to decide the panel size like MDB ,SMDB PANEL SIZES
Can Anyone suggest the Standards (IEC or IS) for selecting copper current density?
How can get elongation of 2 k.G aluminium, if elongated aluminium dia is 2.5 mm?
what is active power & reactive power?
How does the slip regulator works as a startor
what is the difference between ac motor and dc generator
What are the protection required for Transformer, motor, Line, Generator, capacitor, that all i have to refer which standard?(Like Transformer detail IS 2026)
I COMPLITED MY B.TECH AND 10TH CLASS WITH 70%MARKS BUT 12TH CLASS 55%MARKS..CAN I GET INDIAN RAILWAY RECUREMENT EXAMINATION?
Why derivative controller is not used in control systems?
How to Make relay co ordination chart for a Electrical power distribution of a plant
sir, I am from EEE branch.On feb 17 iam going to write an Exam for hindustan petrolium corporation Ltd.So plz send me the written exam pattern/Q's/interview questions.please mail to eee_dharmendra@yahoo.com
Explain the laying procedure and laying depth of submarine/subsea power cable for 220/400KV system? Also available cable diameter?
how to caculate cable size for diff types of loads? if anyone know the calculating procedure please tell me
What are the main parts of central chiller plant? Explain the function of each stage.
what is reverse power relay brief explanation and in b/w where it is connected
