We have 11kV/110V three phase indoor potential transformer in 66/11kV Sub-station, where the failure of PT is frequently happening and the rating of the PT is 0.2 class accuracy, with primary star and seconday (two cores) star connected.
Some experts has suggested to not to connect the PT Primary neutral to the ground because when transformer neutal NCT connection is loose; the faulty current will flow through the PT primary neutral, resulting into failure of PT.
My question is: Is it necessary to remove the primary neutral connection of the PT from ground? if not, what would be the reason for failure of PT.
Please guide me.
Answers were Sorted based on User's Feedback
Intimate whether PT fails whenever there is an earth fault and which winding fails
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / karthikeyan
hai mr.gokul,what kind of failure in pt,please tell me.i will clear this problem..,
regards,
karthikeyan
+919095206722 (whats app)
Is This Answer Correct ? | 0 Yes | 0 No |
we have one 75kw motor 380 volt 3ph amp134 please advise which size of cable required
what are the preventive maintanance actions taken for air circuit breaker? please answer me
Difference between HRG and NGR. Are they both the same thing
define superposition theorem thevnin theorem ,norton theorom?
I have motor 1500 HP and , 4160 V , 60 HZ , then i need the rating of transformer which can feed that motor ??
full form of electrical?
why do we use UPF watt meter in short circuit test of the transformer and LPF watt meter in open circuit test of the transformer
Dear all, I'm manikandan I have done by DIPLOMA EEE from 2011 , I have 5 years of experience from Power plant instrumentation field , which one field is give long life & which one field is best ,I confused a lot and also I'm studying AMIE, can I choose which department from Section B examination? pls tell me
which network topology offers the greatest level of tolerance?
What is the basis for selecting Vk/2 or Vk/4 for REF and Differential protection of Transformer and What is the significance of magnetising current
What is the Different Between Breaker and One and half breaker.
What is the selection process of breakers. Can any one please give a formulation on same?