The device is suitable for 1-phase grids, 3-phase grids without neutral conductor and 3-phase grids with neutral conductor (N) or protective earth (PE).

1-phase grid

In the 1-phase grid, the voltage U₁ and the current I₁ are measured.

3-phase grid without N/PE

The phase-to-phase voltages U₁₂, U₂₃, U₃₁ and the phase currents I₁, I₂ and I₃ are measured in this grid (see figure above).

3-phase grid with N/PE

The phase-to-phase voltages U₁, U₂, U₃ and the phase currents I₁, I₂ and I₃ are measured in this grid. Optionally, U_N and I_N can be measured (see figure above).