AC current metering

[Charles Linquis]

We mount them on a PCB. The model depends on the maximum current. We use the ACS752, but then we are measuring some really high currents. If you need devices that
have mounting screws, you can find those at -

http://www.sypris.com/stm/content.asp?page_id=812

[MarioC]

The model depends on the maximum current. We use the ACS752, but then we are measuring some really high currents.

50 to 100 amps (that's pretty high).

[docwisdom]

Again I need a solution that is physically isolated from the source path. This is why I was looking at the current transformers.

[dhouston]

Again I need a solution that is physically isolated from the source path. This is why I was looking at the current transformers.

The Allegro chips provide electrical isolation of several kV. I'm not sure what you mean by physically isolated.

[Charles Linquis]

Yes, they are isolated.
I have used both current transformers and Allegro devices, and I only use the Allegro parts now because of their size, accuracy and ease of use. Even though I mostly use the larger devices, I have used their smaller parts (SOIC-8 package) to measure currents below 100mA.

[docwisdom]

from what I can see the circuit to be sensed needs to be cut and routed through Ip- and Ip+on the allegro devices.
I need something that does not disturb the circuit to be sensed.

[Charles Linquis]

That is true. Looks like you want a clamp-on current probe. I can't help you there. Sorry!