Voltage/Current Transducer

T

Tuck3rz

New Member

• Nov 3, 2009

• #1

May I know how does a Voltage and Current Transducer works and why does is it neccessary to connect it to a dual supplies?

How do determine the R1 and Rm of the Transducer if I m were to use a
LA25-NP for Current Transducer
and
LV25-P for Voltage Transducer

Thanks and Sorry for the trouble.

 

T

Tuck3rz

New Member

• Nov 4, 2009

• #2

Anyone is able to help me with my qns?
This is de data of the LV25-P
**broken link removed**
What does HT stands for too?

 

Last edited: Nov 4, 2009

MikeMl

Well-Known Member

Most Helpful Member

• Nov 4, 2009

• #3

Read the **broken link removed**

 

T

Tuck3rz

New Member

• Nov 4, 2009

• #4

Thanks mike.. I have the datasheet too, just that i'm still unclear about it.

 

MikeMl

Well-Known Member

Most Helpful Member

• Nov 4, 2009

• #5

Do you know what "galvanic isolation" is?

Read the paragraph starting with the bold title; "Principle of Use"

Do you know how to convert a voltage into a current using a resistor? Hint, it has something to do with R1.

 

Last edited: Nov 4, 2009

T

Tuck3rz

New Member

• Nov 4, 2009

• #6

Sorry, I dun understand the meaning of it...

That means by adding a resistor R1, I m able to measure the voltage?
What about Rm?

 

MikeMl

Well-Known Member

Most Helpful Member

• Nov 5, 2009

• #7

I'm sorry to be blunt, but why are you using this component? It is designed to solve a specific problem, which is to make an "ungrounded", "floating", or "differential" measurement of current in an ungrounded circuit, while maintaining +- 1000V isolation from the input side to the output side.

The device is an active device, meaning it contains opamps, etc which require split supplies to make it work.

 

T

Tuck3rz

New Member

• Nov 5, 2009

• #8

I m designing Two of the LV25-NP and LA25-P transducer to read the voltage and current produced by the generator and also to read the voltage and current inside a lead acid battery.
This transducer board will be connected to a Microcontroller board which consist of a ADC and a DS89C450 chip and it is connected to a laptop via a serial port which display the values on the hyperterminal on a laptop.
Hope you do understand as my english is not that good.