Why the CT Secondary is rated as 5A generally?

Question Posted / senthil

2 Answers
6966 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Why the CT Secondary is rated as 5A generally?..

Answer / iamdon

CT is used mainly for Instrumentation(Measurement and
protection system) purposes that is why it is also termed as
instrument transformer.The measuring and protecting devices
are not rated to sustain high currents.What a CT does is,
it lowers the current in secondary side so that measurement
as well protection can be done at a reduced level of
current.

The digit in CT ratio of secondary side is IS standard for
rated secondary current so that uniformity among manufactures
be established.
The various values of secondary currents are
1)in the range of 0-5 amp e.g, 1A,5A
2)in the order of mA(particularly 40mA)in case of digital
devices for measurements and protection.

Author:arbelectbit@yahoo.com

Is This Answer Correct ?

7 Yes

2 No

Why the CT Secondary is rated as 5A generally?..

Answer / k.prakashchandra

With introduction of electronic protection and
metering ,nowadays 1A secondary CTs are employed.

Is This Answer Correct ?

1 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

HOW DO WE COLLECT THE SOLAR ENERGY AND DESCRIBE THE METHODS TO CONVERT THE SOLAR ENERGY INTO ELECTRICAL ENERGY?

1 Answers

how many types of transformer.

3 Answers Technocrats,

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

0 Answers

How to check phase R,Y,B

3 Answers

What is phase cross over frequency?

0 Answers

what is AVR in alternator how its work?

8 Answers

Briefly describe three methods that are usually used by electricity suppliers to control voltage levels?

0 Answers

we have 1000 litre water tank,it located at 25m hight from ground level,the water level on 10m below from ground level.for fill the tank within 1 hour,how much of motor rating(HP) want to select?

0 Answers

If single phase voltage level is 230V than why three phase voltage level is not 660V ?, but it is only 440V.

16 Answers BSNL, DOS, EFS, HMT, L&T, TCS, ThyssenKrupp,

what is PID control in VFD drives?

0 Answers AES,

when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.

0 Answers

what is the concept of directional power?

0 Answers

For more Electrical Engineering Interview Questions Click Here