AC current metering

[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!