PHASE STATUS CONTROL DEVICE IN INDUSTRIAL MAINS Russian patent published in 2009 - IPC H02J9/06 H02M5/14 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and may be used for uninterrupted power supply of the important consumers when any phase and zero conductors fail. The device contains three phase voltage control relays with closed and open contacts, three linear voltage control relays with close contacts, three balancing capacitors, three phase-shifting chokes, network terminals A, B, C and 0 and output terminals. When any phase fails, voltage is recovered due to balancing capacitor from the previous phase. Phase-shifting chokes of the remaining phases ensure current turning to 30° angle. When zero conductors fail, balancing capacitors are actuated to delta diagram. The phase-shifting chokes are bridges by the corresponding closed contacts of linear voltage control relays.

EFFECT: increasing power supply reliability and reducing losses when zero conductors fail.

1 dwg