DEVICE FOR RECOVERY OF VOLTAGE IN BROKEN PHASE OF CABLE Russian patent published in 2015 - IPC H02H3/253 

FIELD: electricity.

SUBSTANCE: device relates to electrical engineering and can be used to ensure uninterrupted electrical power supply to consumers of self-contained objects at breakage of a cable phase. The device includes cable terminals, three voltage control relays, each of which is provided with one opening and two closing contacts, three thyristor keys, three phase-recovering capacitors, three phase-correcting throttles, three shunting thyristor keys and three output terminals. The voltage control relays are connected between the corresponding cable terminals for line voltage as well as in-series connected phase-recovering capacitor and thyristor key; phase-correcting throttles are connected between cable terminals and output terminals and shunted with thyristor keys, all thyristor keys are identical and each of them includes three parallel chains: the first and the third chains are formed with thyristors of direct and reverse connection, and the second chain is formed with an in-series connected diode of direct connection, a contact group, a resistor and a diode of reverse connection; with that, the contact group of thyristor keys includes in-series connected closing contact of a lagging phase and an opening contact of a proper phase, the contact group of the second chain of shunting thyristor keys is formed with the closing contact of the lagging phase. The above contacts of all the relays control operation of thyristors in the above said keys.

EFFECT: increasing quick action.

1 dwg