THREE-PHASED DEVICE FOR SWITCHING BETWEEN BRANCHES OF TRANSFORMER WINDINGS Russian patent published in 2006 - IPC H01F29/04 H01H19/12 

FIELD: electric engineering, possible use in construction of devices for switching between branches of windings belonging to force transformers under load.

SUBSTANCE: three-phased device for switching between branches of windings belonging to transformer under load has body made of dielectric with bottom and lid, contactor, including three-phased contactor mechanisms with commutating and additional contacts, forming groups, in its body, resistors, through which additional contacts are connected to linear outputs of adjusting winding of transformer, mechanism for switching between contactors and immovable contacts positioned on the walls of body for connection to transformer and to selectors of phase branches of transformer windings, while immovable contacts of phase selectors can be connected to phase branches of adjusting winding of transformer. Mechanisms of three-phased contactors are mounted in the same body, and their contact groups are shifted relatively to each other in phase-wise manner along body axis by means of mounting of contact groups of one or two phases on dielectric substrates.

EFFECT: simplified construction, increased operational reliability of three-phased device for switching between branches of windings belonging to transformer under load.

4 cl, 5 dwg