Answer / octav

If CT secondary is open then secondary current I2 will be
0, and that lead to I1N1 transforming in heat, and this can
damage the CT; depending on CT range this can be just a
insulation resistance damage or a CT explosion.

Answer / gowtham

hi raju, great day,

your answer is quite interesting....this is wat am
expecting...but the strange thing is i hav tested a CT in a
open condition (sec) which doesnt given any drastic outputs
lik heating or burning. my CT is 100/5 A in this i hav
given more than 120 A.. do you hav any datasheet for CT.

Answer / gatzrulz

dear max,
i have practically tested the CT with various values of
inputs. but i have n't get any high value of voltage.

Dear Naren,
what you said is wrong. we do have CT's with higher primary
turns and lesser sec turns. Since im in the industrial
field am just telling this.


Feed back is Appreciated

Answer / r. k.d

Whatever Rajkumar said is totally correct. I like to add
few points in it. when CT is open from secondary side than
it can be assumed that CT secondary resistance is infinite.
Hence, CT will try to increase mag. flex in the core and
when it will cross its rated burden it will get heated and
may explode.
Please remeber that CT will not blow if passes low current.
CT will blow in high current passed for long time only.
that s why CT get blast when short circuit current flows
from the CT.
As open secondary offers high resistance, so it will
produce high voltage accross it.
Hope its clrear.

Answer / gowtham

FRNDS,
ANSWER 1. INRUSH CURRENT IS NOTHING BUT THE CURRENT
PRODUCED DUE TO THE INDUCED EMF IN THE SEC WINDING. FOR
EXAMPLE IF AT ALL IM USING A 100/5 CT IT IS OBVIOUS THAT
THE INRUSH CURRENT WILL BE VERY LOW COMPARE TO PRIMARY...

ANSWER 2. FRND I KNOW THAT SAFETY ISSUE WILL COME...WHAT IS
IT.THATS MY QUESTION...

Answer / manfred

The C.T will explode due to the Inrush Current flowing
through the secondary Windings of the C.T

WHAT IS LIGHTNING,HOW TO CALCULATE LIGHTNING DESIGN CALCULATION?

2 Answers   L&T,

If one lamp connects between two phases it will glow or not?

0 Answers  

What is the difference between MCB & MCCB, Where it can be used,

22 Answers   ACB Group, Badve, Bajaj Electricals, Hensel, Siemens, SR,

what parameters are should nessary for control technic dc drive(in rolling mills)?

0 Answers   TATA,

What is breather? why we use it ?

3 Answers  

how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

0 Answers  

why impedance test in power cables?

1 Answers   CSE,

If a HV Underground Cable (13.8KV) is layed in the ground below 1.5 Mtrs and any building construction is done on the Cable route. IS this allowable or Not? What should be the clearance. As per ISO construction on HV cable route is safe or Not? Why? Can any body suggest the site for my question?

1 Answers   ZCL,

Difference between PLC and SCADA ? What are merits & De-merits of PLCs ? What are merits & De-merits of SCADAs ?

3 Answers   Ambuja,

what are tpes of insulaors& its uses

1 Answers   ABC,

opkinson's test

0 Answers   Bhel,

How can we get a Neutral from a three phase suply? If we meet all three phases at a point to take neutral then why dont thay get sparked?

1 Answers