The kit consists of a multifunction network analyzer of NANO or QUBO series with 3 miniature split-core CTs. It is suitable for use in three-phase with three or four wires electrical systems, even with unbalanced loads and distorted waveforms, for the acquisition of all the main measurements. The small size of the miniature CTs allows an installation even in places with a reduced access, making this system suitable for retrofitting in existing installations, but also an excellent solution for monitoring electrical networks in new installations.