DEVICE FOR PHASE VOLTAGE RECOVERY IN THREE-WIRE NETWORK Russian patent published in 2009 - IPC H02H5/10 H02J9/06 

FIELD: electrical engineering.

SUBSTANCE: device includes network terminals, three voltage control relays, three phase chokes, contact unit with two groups of contacts having common contact points and common capacitor. The first group of contacts contains three pairs of normally closed contacts, while the first pair includes serial connection of the first relay contact with the second relay contact, the second pair - the second relay contact with the third relay contact, the third pair - the third relay contact with the first relay contact. Besides, all pair inputs are coupled with the corresponding phases, while their outputs - with common point of the first group of contacts. The second group of contacts includes also three pairs of contacts. In addition, the first pair includes serial connection of the first relay closed contact and open contact the second relay, the second pair - closed contact of the second relay contact and open contact of the third relay, the third pair - closed contact of the third relay and open contact of the first relay. Besides, inputs from all pairs are coupled with corresponding phases, while their outputs are connected to the common point of the second group of contacts. There is a common capacitor being connected between the common point of the first group and common point of the second group.

EFFECT: increase of accuracy of amplitude compensation in damaged phase.

1 dwg, 1 tbl