in the following experiment the three-phase version of the transformer equivalent to the single-phase circuit should be reproduced. here only the primary side is used for feeding and operation takes place at a value of Un on the secondary side with the corresponding winding tap.
expand the circuit as specified in Fig.2.4 and measure the two voltages U1 and U2 and (after disconnecting the voltmeter on secondary side!) measure the no-load current I10 and the consumed active power P10.