current transformer circuit for measuring current

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hi i m required current transformer circuit for measuring current for energy meter
may anybody help
 

What is the amount of power or ampere did you want to measure??
 
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    fmtech

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zia said:
i want to measure upto 5Amp max and i have ct but i dont have accurate circuit
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AC OR DC CURRENT?
AC: means that you can use current transformer (and it is cheap and simple)
DC: means that you must use Hall effect sensor or shunt resistor (resistor is preferred if your system is not isolated)
 

You can use Hall sensor for AC current or Current Transformer.

Measuring Mains Current Doesn't Have To Be Difficult
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Hi Zia

U can use the Hall Effect Sensor For Measuring the Current Passing through the coil winding...
This will produce the magnetic flux according to increasing Load on this coil line inserted to the Sensor Field..
 

if you ratio between no. of winding in secondary & no. of winding in primary, proportion the output to be taken as current.
 

need some necessary information, e.g.input current and output current, input winding is 1 turns normally, so that can calculate turns of secondary winding, accurate degree, e.g. 0.5 or 0.2, and dimension, so that select core.
 

Since you're going to be using it for energy meter, precision is required. So, you should get a good-quality current transformer or a half-effect sensor. Then, you can get accurate readings.

One simple method is to use a shunt and a regular 50Hz transformer across the shunt to get output and then measure from the output. However, this is probably not going to be very accurate and may not be good enough for an energy meter.

Hope this helps.
Tahmid.
 

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