Same issue here.
The issue is very well described in the first post: the apparent power seems to be measured/calculated/displayed, not the active power.
It’s not just a question of subtraction: the Rogowski coil measure the current, but has no clue about the voltage. What the Vue seems to do is to output the apparent power (i.e. the product of current RMS and voltage RMS, which is basically constant). What the Vue should do is multiply the current with voltage (including phase) before averaging. The problem is that there are 3 phases, so it become a bit more tricky to choose which phase to multiply.
So what should be done is to be able to associate each coil with a phase in the configuration pannel, so that the computation would become correct (computing the active power). We could argue that this is slightly more complex to configure and to explain in the user manual, but that’s the only way to monitor something valuable. For devices having a small cosphi, the readout is otherwise totally wrong and the Vue becomes pretty useless. This is really a pitty because the hardware is really nice !
