How can i calculate knee point voltage of 800/5A Current
transformer?please explain me with suitable calculation?
- 2 Answers
- 10151 Views
- I also Faced
- E-Mail Answers
Answer Posted / mprajaneb
For design purposes we can calculate the required knee
point voltage of a CT as follows.
Vknee= (50/In) + (If/(800/5))*(Rct+0.081)
In = CT secondary current (5A)
If is the fault current expected to flow through the CT
Rct - Resistance of the CT secondary.
| Is This Answer Correct ? | 16 Yes | 3 No |
Post New Answer View All Answers
How do i right a ladder diagram that has 1 actuator that performs a full stroke followed by a half stroke
how we select ac fuse rating of an power inverter???
What is industrial plc
How can eliminate noise problem inside temperature controller temp. variation due to contactor chattering problem.
bitumar
what are types of encoder
Why we specify TNC switch with 1NO 1NC ,2NO 2NC ? how we get connection.?
What is the meaning of floating point earthing in battery backed systems ?
please give me all the Alarm .Trip ,Safety Relays & Conditions of UPS Systems mail me on ashokbabunhce@gmail.com
Explain the operation of variable frequency transformer?
How many types of probe used in cro?
If rotor works in clock wise what happens
how dia of wire and angles are calculated for overhead shielding wire to protect substation equipment from lightening strokes???
sir am giving jspl exam on 19th oct . i belong to eee, so plz send previous question papers ..........to dis id abhilash203@gmail.com
what is a composite error in current transformers, why occurs & in which it will occur i.e, either metering ct/ protection ct
