Can I use measuring current transformers in protection
purposes?
Answer Posted / ramesh kumar k
Mr.Mohit & Ms. Minnu...
both of u be cool specially... it is not a war field
yaar... ha.. ha...
What ms.minnu said is correct...
u cant use the measuring CT for protection purpose...and
protection ct also can't be used for measuring purpose...
it is not safe...
So Mr. Mohit, from my point of view what you have might
done is.. u have used a CT which u have purchased for
measuring purpose, but still having a additional core for
protection and u might have shorted the metering core
terminals and used the protection core only.. if you have
not used so... I think your system is still safe because
there is not shortcircuit fault tilltime... its very
dangerous if any short circuit occurs... because a metering
CT core is designed in such a way that if there is any
shortcircuit.. it gets saturated and doesnot deliver any
output... if u use this for protection purpose your relay
will not get current(i.e. it gets 0 A which is nothing but
no load condition..). But your relay is set to operate only
in over current conditions... so now what happend.. even in
over current condition, your relay is not getting over
currents hence it will not send any signal to the circuit
breaker...
I suggest, in this regards, u please consult ur higher
authorities...
Ms. minnu, i think we have not studied enough on CTs & PTs
n our basic engineering study...
P.S:
I welcome u both for further clarifications, mail me at
rammy_233@yahoo.com
Is This Answer Correct ? | 12 Yes | 0 No |
Post New Answer View All Answers
what is resver in electrical enginnering with answer
What is the effect of interchanging core(made of steel) and winding(made of copper) material in case of transformer? Give proper explanation in regard to different losses in transformer.
What is creepage distance..... what will be the value for different voltage level
full form of electrical?
Is there chopping current in resistive circuit
What is the role of power pack in substation protection system?
what is PDU in transformer?? which company manufacture??
any one please tell taht what type questions will be asked in BHEL interview, i am having interview on 24th Dec, please send this to mail pradeepsistam@yahoo.co.in
what is the id1 & id2 setting in differential protection relay of CSPC?
If a high resistance fault occurs,then what are the changes will happen in the system?
What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?
why are distributed windings generally used in alternators?
draw 3 phase rectifier diagram
What are merits & De-merits of State-Space Method? What is series programming, parallel programming, general programming & direct programming ? And, difference between these programmings Techniques ?
The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is