What is the difference between CT for protection and Ct for
metering?
- 16 Answers
- 122620 Views
- BirlaSoft, I also Faced
- E-Mail Answers
Answer Posted / shashi kant
PROTECTION CT CORE is different as compare to Metering CT,
as metering CT SECONDARY is connected to meter to measure
so accuracy is needed ,so the core of Metering CT is
designed or made in such that its core gets saturated on
enmourse increase of primary current, for ex CT with
accuracy of 125% of rated current of ratio400:1, means its
seconary current will never go beyond 1.25amp i.e if the
primary current is 1000 amp,as by the above ratio the
secondary current should be 2.5amp, but in the case of
protection CT as its secondary is connected to relay to
sense the fault current so accuracy is not so important ,
if metering CT IS placed in place of protection ct, then in
case of any fault a heavy fault current in primary of
Metering CT the secoundary output current will be limited
to its rated current (generally 125%) which will be normal
and so the relay may not able to sense the fault
| Is This Answer Correct ? | 12 Yes | 1 No |
Post New Answer View All Answers
How to test lightning Arrester?
in battery charging room we find two fuses (one in positive other in negative cables ).why it is so?one fuse is ore than sufficient?
what is the power rating of CPU, CRT type moniter, LCD type moniter,scanner Approx.
what is the usage of microcontroller in the panel board?
If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these
What is the function of attenuator in cro?
how can i use REF and diffrencial relay both in 1 CT core for transformer protection?
what is mppt (maximum power point tracking ) and how they used in solar power generation ??? what are the main components used in mppt?????
What is the most important precaution in any experiment with d.c. Shunt motor?
how we decide scurt (disc) of insulator with respect to kv rating
How to identify the start and end of 3phase 12 lead motor if U1, U2, etc numberings are lost or erased.
What is inverse definite minimum time lag relay? Where is it use?
What are the causes of unbalanced current on 34.5kv feeder Ia=0.05,Ib= 0.25, Ic=0.15 and In=0.27 prior to tripping current are balance?
why the carbon brushes are broken in srim while the motor runningtime
Why we make earth connection with Transformer Body and What will be the minimum size of copper wire as per code with respect to KVA rating of Transformer?
