Patent ID: 7821162

Claim:
Device ( 1 ) for generating voltage dips in an electrical power generator ( 2 ) with a control cabinet ( 4 ) at the output of the generator and an output transformer ( 3 ) to an electricity network ( 30 ) characterised in that it comprises: a) a circuit located between the control cabinet ( 4 ) of the machine and the output transformer ( 3 ) to the network ( 30 ) with a transformer ( 31 ), a plurality of impedances ( 11 , 14 , 17 ; 12 , 15 , 18 ; 13 , 16 , 19 ) in-series for each phase, having a first group of switches ( 24 , 25 , 26 ) associated respectively with each phase and a second group of switches ( 20 , 21 , 22 ) associated with the in-series impedances, and a switch ( 27 ) for connecting the circuit to ground; b) mechanisms for generating short circuits by activating the first group of switches ( 24 , 25 , 26 ) in order to select a single phase, two-phase or three-phase voltage dip, by activating the second group of switches ( 20 , 21 , 22 ) in order to select the depth of the voltage dip and by activating the third switch ( 27 ) in order to generate a short circuit to ground; and c) mechanisms for protecting the network ( 30 ) during voltage dip generation.