Interested to Buy Any Domain ? << Click Here >> for more details...
what will hapen if secodery circuit is open of current
transformer
- 8 Answers
- 18801 Views
- KPTCL, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
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 |
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 |
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 |
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 |
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 |
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 |
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 |
how i decrease the neutral to ground voltage , thats i read 7v on my digital meter.i dont know about my earth pit.
high voltage transformer input voltage,current and amps rating..distributed transformer input voltage,current and amps rating...
How two nos. 130 kw D.C motor get synchronise using D.C drive.
What are :- AC Distribution Board (Single & Double Front) DC Distribution Boards Distribution Board LT Breaker Panel.
dear all, in motor operation , motor is of 100 hp and bimetal relay setting is 130 amp, if relay is getting tripped on 120 amp balance current what can be the reason? Relay is newly replaced. I dont know but is there any frequency effect in thit case? Can frequency variation affect bimetal relay operation?
Residual voltage & residual current used in which protection?
5 Answers Qatar Gas, Reliance, Transformers and Electricals,
In a voltage-controlled current source A A current booster is never used B The load is always floated C A stiff current source drives the load D The load current equals Isc
Can I use cable armour as a earth conductor? if not how many GI/CU wires I need to run along with cable?
I have a CT meter with ratio 60/5. The meter reading of previous month was 3290.49 and that of current month was 3797.26. How many chargeable units as per normal meter should be my reading.
During regenerative breaking= A rotating magnetic field is reversed B slip is positive C torque is positive D slip is negative
what kind of technical test that i need to learn because i have an interview tomorrow.. please someone help me..
What is maximum load capacity of 800 VA inverter?
-
Civil Engineering (5086) - Mechanical Engineering (4453)
- Electrical Engineering (16638)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
