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

WHY IS HV WINDING OF A TRANSFRMER SECTIONALIZED???

3 Answers  

what is unit of inductance

12 Answers   Bhel, Bosch, OSML, Vijai Electricals, Voltage,

why we use copper earthing for neutral while for body GI.

1 Answers   Chennai Metro Rail Limited CMRL, Valeo Lighting Systems India Private Limited,

why we are using star connection and delta connection? difference?

5 Answers  

why in india the voltage generate multiply by 11,,,like 220v,440v,11kv,33kv,66kv,220kv,

3 Answers   NTPC, Servotech, Tata Power,

Please let me if star point(Nutral) of Delta/ Strar transformer, in 4wire (TPN+E) is tobe gruonded seperatly,inaddition to LV Panel earthing????

1 Answers  

How to check the specific gravity of the two 12 V batteries connected in series to a 24 V UPS and inverter ? will we have to disconnect all the connections and turn off the UPS and inverter or not ? will we have to check specific gravities in each cell of the two batteries ? what is the name of the instrument that is used to check the specific gravity and whats the procedure to check the specific gravity with it ? thanks

2 Answers  

If two Transformers are connected in parallel having impedance of 50KA in both transformers will the impedance increase or decrease after connecting transformers in parallel?

0 Answers   Posco,

what is "PE" earthing? and what do u know abt 16mm cable?

1 Answers  

which types of relay used in acb and vcb?

0 Answers   IBM,

galloping in transmission line is due to

2 Answers   DVC,

Wat is the best to use in a generator a 6.5kva or a 7 kw

4 Answers