Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Measuring high voltage with AC current meter

Status
Not open for further replies.
Y

yousafzai

Full Member level 5
Joined
Jun 1, 2006
Messages
242
Helped
15
Reputation
30
Reaction score
8
Trophy points
1,298
Activity points
2,295
I tried to tag ac current and display it on an LCD. I was successful initially but in order to measure currents at higher voltages i figured it out that high wattage in-line resistors are required. Is there anyother option apart from Hall Effect sensors to do this?
 

Re: AC Current Meter

Hi,

You have probably heard of clamp-on current meters? Basically they are current transformers, you insert your cable or wire as a one-turn primary (in which the unknown current flows) into their "mouth" by opening their measuring head (a toroidal core with built-in secondary coil + electronics) and read the display.

See this link (but there many other of course): **broken link removed**

Sorry if this is not useful info but you did not mention this method in your mail.

rgds
unkarc
 

AC Current Meter

using CT current transformer is easy. if you want to measure upto lets say, 1000A take CT of ratio 1000:5 that is it will give an output of 5A on 1000A which you can further give to a resistor and then to opamp--adc etc.

and calculate the ratio back again

Bye
 

Re: AC Current Meter

hi
u can use hall_effect ct .it can be use in Ac & Dc application
 

Re: AC Current Meter

Hi Yousafsai,

I found a circuit with a 1:1000 current sensor. They used two 1:32 transformers
to get to 1:1024 and corrected it to 1:1000 by increasing the 100 ohm feedback
resistor to 102 ohm. The opamp converts the input current to an AC output voltage. The transformers have one winding on the primary and 32 on the secondary side and are wound on Philips RCC26/10-3C11 cores.
But you could easily construct two 1:10 transformers to get a 1:100 current ratio
and measure it directly.

on1aag.
 

AC Current Meter

for Hall effect current taransformer.rar see
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top