The MAK3 is an adaptor for measuring at 3 phase systems up to 16A per phase. It is developed for the instrument series LMG, but you can also connect other instruments. The supply is done by a about 2m long wire. The schuko jack is to supply the instrument. If you are measuring a load, the power consumption of the instrument is not taken into account, because it is supplied before the measuring connectors. If you are measuring a generator, you should supply the instrument from another jack to avoid measuring errors. With the MAK3 you can measure the voltage of the three phases (jacks U1*, U2* and U3*) against the neutral connector (U1, U2 and U3). But you can also measure the linked voltages. The three currents are also accessable (from I1*, I2* and I3* to I1, I2 and I3). Further on by using a 4-channel instrument you can measure the voltage between neutral and earth (U4* against U4) as well as the current in the neutral (I4* to I4).
