Why C.T secondary s2 done earthing?
Answers were Sorted based on User's Feedback
Answer / k.prakashchandra
For safety against probable high voltage of primary
appearing in the secondary ,due to either insulation failure
or capacitive coupling between primary and secondary ,as
earthing has reference to the primary voltage.
Is This Answer Correct ? | 13 Yes | 3 No |
Answer / tamilarasu
Incase sometimes we want to change the ammeter or any c.t
using relay that time we shorted the s1,s2 tappings. incase
we forget the short of s1,s2.same time c.t burned& it
produce some dangers .so we reduse the danger from c.t
regarding the earthing
Is This Answer Correct ? | 6 Yes | 6 No |
Answer / henry vakharia
Current transformers are classified in two categories viz.
protection and measuring classes.
In protection relay, the earth fault is detected from the
earthed terminal or say the common terminal shorted
together and then grounded, which makes the relay detect
the earthfault other than its core function of protecting
equipments from high voltage surges.
In measuring relay, the C.T. is grounded to give protection
from the primary high voltages surges.
Is This Answer Correct ? | 2 Yes | 3 No |
Answer / d.lakshmi narayana
IN HT IN CT SECONDARY SOME VOLTAGE GENERATED.THIS IS ACTUAL
CONDITION. IN FAULT CONDITION IT IS INCREASED. ON THT TIME
CURRENT OPERATED COIL IS SOME TIMES IT WAS DAMAGED OR
SUPPOSE U R USING INTEGRATED RELAY SOME TIMES IT WAS DAMASED
THAT'S WHY THE CT SECONDARY IS EARTHED OTHERVICE MORE
VOLTAGE IS COMIG SOME TIMES THE CT OPERATED RELAY WAS
MALFUNCTIONING.
SO CT SECONDARY IS EARTHED
Is This Answer Correct ? | 2 Yes | 5 No |
how can we select the type of wire.what factors we have to look on it , do we have some formula to calculate it. please guide me on it
What is the difference between earth and neutral
Dear sir, iam completed iti ncvt electrician 2000-2002 & diploma electrical eng completed 2008-2010 distance education in rvd university, still i got B licences only but my working company want C licences, how to i get c licencese pls reply me iam in critical situation thank you karthick 9841637803
What is dc current source? Differentiate between ideal and non ideal current sources?
What is the voltage violating limit to be considered for load flow study? What is acceptable deviation limit according to relevant standards?
How the oil level of the Buchholz Relay come down.
Why DG self motor winding burnt out?
whats happen if we disconnect the NGR of alternator in running condition?. Generally we observed that transformer netrul is directly grounded but alternator connected with NGR, then ground?
ohm's law is applicable to DC/AC/Both??
What is the difference between earthed and unearthed power cable.
What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)
what are the differance between neutral and earthing?