Why in medium voltage system(3.3kv to 33kv, neutral is
earthed with either resistance, reactance or neutral
grounding resistance?
Answer Posted / loganath
voltages which are mentioned will be used in distribution
applications where fault current must be limited to limit
the loss of life and machines, hence it is earthed to
through resistance or reactance, earth fault relays must be
very sensitive enough to snip earth faults in these systems
Is This Answer Correct ? | 8 Yes | 3 No |
Post New Answer View All Answers
what is the diference between the 4pole & 6pole DC Motors & what is advantage 6pole over the 4pole ?
Explain the operation of variable frequency transformer?
how to select electronic timer(Star-Delta) setting for diff. rating motors
What is the source of dependent source ?
when will be the iocl interview results ifaced the interview on september 8 th
how to select the double earth conductor if 21A full load?
R=*ΒΆ l/a
what is the IS foe lightning arrester?
Scott connection is used for A 3-phase to 2-phase conversion B to achieve higher effciency C to save copper D to reduce harmonics
How much of the total hydro power potential has been exploited so far in india?
my diploma certificate in my higher education college
Why do we avoid electrical conduits in floors at apartments?
what is v/f control in VFD?
How can we select suitable capacity generator for three phase load (inductive load) and how to take study analysis in 3 three phase load system ?
A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.