Interested to Buy Any Domain ? << Click Here >> for more details...
why middle phase should used for earth fault and other
phases used for over current in overcurrent and earth fault
relay?
- 7 Answers
- 11428 Views
- ABB, ONGC, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / prasun bhaumik
It is a convention there will not be any problem
technically if we change that arrangement
| Is This Answer Correct ? | 7 Yes | 4 No |
Answer / vishal ingle
Not necessary to use only the middle phase.
our Back up protection cosist of two overcurrent elements
and one earth fault element.
under normal condition vector (IR + IY + IB) = 0
in fact middle phase is not used for earth fault prot.
Earth fault relay is connected between the star point of
all three phases (after O/C Relay) and the earth. if any
unbalance occurs, the unbalance current will flow through
the e/f relay.
| Is This Answer Correct ? | 1 Yes | 1 No |
Answer / gunasekaran
on that point resiudual current is zero normally current sum
is zero at thatt point whenever balance is distrubed current
will flow
| Is This Answer Correct ? | 2 Yes | 3 No |
Answer / j.dev singh
for balancing of two phases current in relay.
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / amrander singh
Please tell the answer Clearly......waiting..
| Is This Answer Correct ? | 0 Yes | 4 No |
Answer / pragnesh patel
This kind of arrangement is use for saving one over current
relay.
| Is This Answer Correct ? | 0 Yes | 4 No |
Answer / vinuram
first and 3rd phases are having voltage and current
flactuation.
| Is This Answer Correct ? | 0 Yes | 7 No |
Please provided formula for calculate the cable size from step up transformer to M.V panel, run overhead aluminum cables, total load is 5mega watt, total length 900 feet.
what happen if any one phase of a slipring induction rotor winding is open?is it start or won't?
Can we use HRC Fuse inplace of Semiconductor fuse?
why ht motor connection in star
what are the type of transformer?
Alternator rotor earth fault relay circuit
(1)Electrical power is generated in KV, power consunmed is in MW and the transformers used are in KVA. How is KVA converted to MW as power being consumed by the consumers? (2)What is vector group of a transformer?
I am going to appear for the RRB Chennai junior Engineer online exam. Please send me the previous exams question papers (also solved) to my mail id: rrkhandhar@yahoo.com
what is the difference between a feeder and a cable?
how to work droop ct in generating station
in case of transformer the power factor is depend on input or the output
What is inrush current? how can calculateit? what is the affect of it?
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
