Ok, let's say you want to do a measurement of the short-circuit impedance relating to the electrical system of a house/room/lab/whatever. This is something you usually have to do if you want to choose the correct level of the protective devices.
I'll show you how to do a measurement of:
- short-circuit impedance in case of a single-phase failure;
- short-circuit impedance in case of a two-phase failure.
All you need is an impmeter and a multimeter.