what will hapen if secodery circuit is open of current
transformer

Answers were Sorted based on User's Feedback



what will hapen if secodery circuit is open of current transformer..

Answer / thowsif_emerson_csm team

The CT Will Burn....

Why does opening a CT's secondary cause dangerously high
secondary voltage?
With the flow of both primary and secondary currents the
transformer's exciting current is very low. The secondary
current mmf serves to keep the magnetizing flux in check!
If the secondary now opens the primary current mmf produces
an exciting current 'orders of magnitude' greater than
normal. And, the resultant large increase in flux density
produces an extremely high voltage in the secondary.

Regards,
Thowsif.

Is This Answer Correct ?    26 Yes 3 No

what will hapen if secodery circuit is open of current transformer..

Answer / mohankumar n , aee power plant

since I1/I2=V2/V1= K which is called as transformation
ratio if CT secondary gets openned A High voltage across
secondary will results on over heating of ct & if it is
allowed results on ct flashover. CT openned secondary
voltage depends on the line voltage & ratio. ie IF line
voltage is 415v & ct ratio is 1000/1 Amps during secondary
opennned case voltage will be 415*1000=415000 volts. this
voltage will definetly damage the ct as its insulation
level is lower than yhis.

Is This Answer Correct ?    14 Yes 0 No

what will hapen if secodery circuit is open of current transformer..

Answer / b.murali dhara babu

The Current transformer cores used for protection are
designed to work at low flx density during normal operating
conditions i.e at rated capacity .During the CT secondary
open conditions the flux produced in the core will become
high due to flow of current in the primary and has no
oppsing flux due to CT secondary winding . This may
causes development of the high voltage which is equal to
E=4.44 x flux x Frequency .Diring the fault conditions the
current value goes up and there by the flux value in the
core also goes up and causes very high voltage to develop
in the CT secondary . The CT secondary insulation was not
suffient to with stand the voltge stress and causes the
filure of insulation and inturn the CT .

Is This Answer Correct ?    4 Yes 0 No

what will hapen if secodery circuit is open of current transformer..

Answer / ritesh khimani

i think the net power that can be transfered by ct is the
diffrence between primary and secondary power.if seconbary
is made open then net power becomes primary power which may
cause the damage to the transformer.

Is This Answer Correct ?    3 Yes 0 No

what will hapen if secodery circuit is open of current transformer..

Answer / mahesh

suppose secondary circit is open the ct is failed.we have to now ct is consist of primary and secondary windigs if secondary is opene large amount of current is flow and damage of ct.

Is This Answer Correct ?    5 Yes 3 No

what will hapen if secodery circuit is open of current transformer..

Answer / ramaswamy

transformer failed

Is This Answer Correct ?    6 Yes 13 No

what will hapen if secodery circuit is open of current transformer..

Answer / pushpa.m.j

Transformer is used to transmit the higher power in to
required amount that is from primary circuit to secondary
circuit .If secondary circuit opens means there is no any
current,hence transfermer is failed to transform the power.

Is This Answer Correct ?    2 Yes 10 No

what will hapen if secodery circuit is open of current transformer..

Answer / santhosh

its depend on the windings if secondary more no winding
compare to primary then it do not effect it

Is This Answer Correct ?    2 Yes 10 No

Post New Answer

More Electrical Engineering Interview Questions

how much current (in MW)can be carried max. through S/C dog & Panther Conductor ?

1 Answers  


Why the brushes used in dc machines are made of carbon not from other metal?

3 Answers  


How PADO software increase the efficiency of power plant?

0 Answers   Avalon, SVS,


suppose i have two single and three phase induction motor,thier have not any rating on its panel,anybody can tell me which motor is single or three phase?

1 Answers   Doon,


defination of loads

1 Answers  






how electronic energy meter works?

2 Answers  


how can u determine size of the conductor by knowing the voltage level

2 Answers  


Why we have use 3 & 1/2 core cable use for general electrical supply arrangement

1 Answers  


Why CT secondary is grounded?

11 Answers   GE,


I am completed DEEE in tamilnadu, now i am working in andhrapradesh with 2.5 year experience in relavent field. capacity of the tranformer is 11KV, 1MVA Transformer, i am eligible for getting c licence in andhrapradesh pl help me.

0 Answers  


What products have you designed which have entered high volume production?

0 Answers   Intel,


What are root loci?

0 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5084)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16631)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1094)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)