how can we calculate ct ratings ?its any formula ?

Question Posted / kumar

3 Answers
7951 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

how can we calculate ct ratings ?its any formula ?..

we calculate ct rating not by turns ratio factors considered
are application & va required. You need 5A OR 1A secondary
of ct. Generally we use in ht side 1A CT's & 5A CT'S IN LT SIDE.
Application means Metering or ProtectionIf you dont know
please read the name plate of CT's

Is This Answer Correct ?

2 Yes

0 No

how can we calculate ct ratings ?its any formula ?..

Answer / javed iqbal

calculating the ct ratings depend on the load either motor circuit or transformer circuit. for example if we have a motor which full load current is 160A then we need a ct 200A/1A or near.Mean that primary current is 200A and secondary current is 1A which is usually use for measuring the motor current on running condition. Because measuring instruments are design for low current inputs mean that 1A is equal to 200A and when motor running on 100A then its equal to 0.5A but measuring device configure it to 100A on display.

Is This Answer Correct ?

1 Yes

0 No

how can we calculate ct ratings ?its any formula ?..

Answer / karthik raman.b

by using turns ratio we might calculate

Is This Answer Correct ?

3 Yes

6 No

Post New Answer

More Electrical Engineering Interview Questions

why protection and metering CT's are always connected in star why not in delta?

5 Answers Reliance,

what is size of 3phase 4wire cable to be used for 11 ton ductable A.C and how to calculate cable size for different load

0 Answers Tata Power,

HOW isolation transformer works.

2 Answers

what do u mean by knee point voltage?

7 Answers TATA,

may anybody tell me the names of institute where plc programing course are conducted

1 Answers

Is a induction motor rotate by back emf ? If not , then how it is rotate ?

1 Answers

Off-circuit Tap changers in distribution transformer required

1 Answers

How can we calculate strength of copper hich is supplying electric power to heater and in it hold the heater also and what r all types of forces which is acting on it...

0 Answers ABB,

HOW TO CALLICULATE RESITENCE,REACTANCE AND IMPEDENCE VOLTGE OF TRANSFORMER 13.33 KVA 144/240 VOLTS 93/56 A WITH FORMULA

0 Answers ISRO,

How much no load current of synchronous motor

0 Answers Nirma, Sulphur Mills,

how to calculate the phase diffrence beetween given two equetion y= 15sin(wt+pi/3) and y=10sin(wt-pi/4)

1 Answers

why gravels is used in transformer yard?

6 Answers

For more Electrical Engineering Interview Questions Click Here