Patent ID: 7851942

Claim:
A circuit arrangement for supplying variable loads (I 1 , I 2 , M 1 , M 2 , O 1 , O 2 , O 3 ) from three phases (L 1 , L 2 , L 3 ), comprising a circuit arrangement including four groups of terminals (A 11 , A 12 , A 13 , A 14 ; A 21 , A 22 , A 23 , A 24 ; A 31 , A 32 ; A 41 , A 42 , A 43 ) for loads (I 1 , I 2 , M 1 , M 2 , O 1 , O 2 , O 3 ), the loads are subsequently designated as terminal groups; the circuit arrangement is capable of supplying the terminals (A 21 , A 22 , A 23 , A 24 ) of the second terminal group from the first phase (L 1 ); the circuit arrangement is capable of supplying the terminals (A 41 , A 42 , A 43 ) of the fourth terminal group from a second phase (L 2 ); the circuit arrangement is capable of supplying the terminals (A 11 , A 12 , A 13 ) of the first terminal group and the third terminal group (A 31 , A 32 ) from a third phase (L 3 ); the circuit arrangement capable of controlling the voltage of the four terminal groups, wherein a first control loop is allocated to the first terminal group and the first control loop comprises a first controller and a first group of controllable switches (S 111 to S 132 ) for setting the voltage as actuators, which is subsequently designated as first group of switches, a second control loop is allocated to the second terminal group and the second control loop comprises a second controller and a second group of controllable switches (S 211 to S 231 ) for setting the voltage as actuators which is subsequently designated as second group of switches, a common third control loop is allocated to the third terminal group and the fourth terminal group and the third control loop comprises a third controller and a third group of controllable switches (S 311 to S 345 ) for setting the voltage as actuators, which is subsequently designated as third group of switches.