What will Happened if the polarity of CT is changed?
Answers were Sorted based on User's Feedback
Answer / jk
Dear MMK. What's wrong UR posting. Ammeter reading from
left to right(0 to 90DEgree). It's starting point is
leftside only. then how it possible.
I think, for messuring CT it may work. but in
cause of protection CT, defenitly it will cause for
tripping the relay & system
Is This Answer Correct ? | 9 Yes | 0 No |
Answer / k.prakashchandra
Only the meters which require voltage input also show the
negative readings.Directional and distance relays(on reverse
zone) trip.
Is This Answer Correct ? | 8 Yes | 1 No |
Answer / sanjay sharma
It is depend on type of scheme, in protection , if three phase ckt then reversal of 1 CT polarity relay will (if set value Reach), reversal of all three phases will not effect for normal protection (except to directional protection). In case of metering Ameter will not effect, but energy meter will not work,if single CT reverse in case of three phase, mode (import/export) will change.
Is This Answer Correct ? | 6 Yes | 2 No |
Answer / chadu
CT refferce to current transformer to sence the current.
if u reverse the ct treminals ur the same current reading
but with opposite polararity.
Is This Answer Correct ? | 5 Yes | 4 No |
Answer / aggarwala111
Ammeter show the opposite reading as previous.
Is This Answer Correct ? | 4 Yes | 4 No |
Answer / grg
If we reverse the polarity the relay will see reverse
direction.The protected zone will get reversed.(incase of
distance protection)
Is This Answer Correct ? | 2 Yes | 2 No |
Answer / sanj
CT polarity is vital part. if polarity changes of any ct out of 3 impact will be there both for measuring and protection ckt.
For measuring ckt please watch
https://www.youtube.com/watch?v=FqLVEeoaXws&t=181s
and for protection ckt impact watch
https://www.youtube.com/watch?v=p-cuvTe8sX8&t=129s
Is This Answer Correct ? | 0 Yes | 0 No |
what happen if any one phase of a slipring induction rotor winding is open?is it start or won't?
What can a fresh(without experience) electrical engineer contribute to NTPC( Or any PSU company) growth?
how we select ac fuse rating of an power inverter???
what s d difference between inverter an ups
What is auto transformer?
28 Answers ABC, Transformers and Electricals, US Consulate,
Explen all type electrical protection ? like O/C,E/F,NPS,VOLTAGE UN BLANCE,CURRENT UN BALANCE,NAGETIVE PHASE SEQ,AND ETC...............electrical Protection
how do you calculate IKW(consumption per TR) in HVAC?
27 Answers Aircon, CBRE, Cipla, Clivet, Cushman Wakefield, JLL, Sodexo, Voltas, Wipro,
does meager test perform on lightning arrester ? if doesn't then why ?
Can anybody tell me the Electrical IS rules website?
What is the name of powder which is used in inner side of a cable? and purpose?
resistivity of copper
in non technical way how can u define POWER FACTOR??