Wago makes several kinds of transducers (transformers and Rogowski coils) and corresponding input modules (750-493, 750-494, 750-495). For use with a different brand PLC you would need to apply a remote I/O setup that you read into your choice PLC through a fieldbus (e.g. Modbus/TCP).
Using with Wago software is pretty straight forward as there is a CoDeSys library with function blocks for getting power factors, current, voltage, cosinus phi, frequency, harmonics, active/reactive/apparent power etc. As far as I'm aware all processing is done in the input module, so with some leg work (specs of the module's process image) one can read the values from whatever PLC that "speaks" the same fieldbus.