Interested to Buy Any Domain ? << Click Here >> for more details...
Why Neutral Busbar CT & transformer neutral CT connected
with phase CT in Restricted Earth Fault?
- 3 Answers
- 19134 Views
- I also Faced
- E-Mail Answers
Answer Posted / vinod g
In Restricted earth fault protection Three phase CT is
parralleling (shorting all S1 andshorting all S2 together)
and paralleel conection with Neutral Relay and CT. IN
Healthy conditon current in all the three phase will be
balanced and summation will be zero. During earth fault out
side CT area summation of phase CT currents and Neutral CT
zero, so relay will not pick up. When earth fault inside
the transformer the current in the CT will differ and Relay
will pick and trip the tranformer breaker,so it is clear
that REF is for Transformer Winding protection and Bushing
CT is normally using for phase CT
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
What type of fittings and electrical accessories can be install in radiation area ?
how we can adjust for three phase motor cold stall time ,hot stall time and thermal register set up?
WHAT WOULD BE THE FORMULA OF WIRE GAUGE FOR A FULL LOAD CURRENT
What is the rotor frequency of 10 Hp 1440 RPM 50HZ 415V ?
the typical output of a solar cell is........
What is core CT & it's function?
In DC generator, we use commutator, having no. of segments. Then how it is possible to get a half wave of voltage and current for half rotation of armature?
if an insulated power and control cables of a running gas diesel gensets laid direct in an open trench i.e, trench bed is not rcc of a power house in which rain water, spillage water alwas exists and all power control cables remains submerged even when gas gensets of 480 kw each runningin on load. These power &control cables runs from power house to switchgear room through these trenches in which water remains most of the time. pl explain its merit & de-merit
what topics we have to concentrate for power grid et.written test.and tell what to read for english synonyms and antonyms.
HOW WE CAN REDUCE THE CIRCUIT COMPLEX OF STAR-DELTA STARTER .BECAUSE NOW WE USING ONE TIMER RELAY & THREE CONTACTOR FOR MAIN,STAR & DELTA ?IF ANY IDEAS PLZ POST.THANK U
how we do Vector group ,magnetic balance and tap changer test in Transformer?
What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?
What will happen if a dc source is given to a tubelight. Will it work or wont it work....
in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.
Why using synchronising methed in DG's sets?
