what is back trip and re-trip in protection schemes? why
these two? define me the exact function of these two?
- 1 Answers
- 6212 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / santosh kawade
Backup trip and re-trip are functions use for high voltage
overhead transmission line feeders.
In this system normally fault occurs are very short
durations like fault due to birds or due to fall of some
objects on transmission lines. In this case transmission
line trips due to fault but again breaker auto close after
certain duration (approx. 500 to 1000 milliseconds). But if
fault persist it again trips and will not close
automatically at second time.
Santosh kawade
9224 69 3116
| Is This Answer Correct ? | 2 Yes | 9 No |
Post New Answer View All Answers
Why air circuit breaker off due to power failure?
Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.
how is the cable tray designed & how its total length is calculated for an Industrial plant Say for Ex. (500KW Motor Load)
Cb closed condition if there is a tcs fail whether cb will trip or not
How to Preparation of online test
what are the tests comes under the type test, what tests comes under routine tests.
What does quality factor depend on in resonance?
features of hbc fuses
orifice sizing how done, checking & selection
What is use of starter and choke in tube light
how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???
How good are you in resolving the commercial issues to Employer's advantage?
State magnitude criterion.
how we do Vector group ,magnetic balance and tap changer test in Transformer?
what is magnetizing current test in power transformer
