EP 0254946 B1 19911016 - A SINGLE PHASE AUTO TRANSFORMER
Title (en)
A SINGLE PHASE AUTO TRANSFORMER
Publication
Application
Priority
JP 17659786 A 19860729
Abstract (en)
[origin: EP0254946A1] A shunt winding (l4) and a series winding (l5) are connected in series and wound around a main iron core leg (ll) and a first exciting winging unit (l6a), a tap winding (l7) and a second exciting winding unit (l6b) are wound around a side iron core leg (l2) and arranged in the recited order. The series circuit of the first exciting winding unit (l6a) and the second exciting winding unit (l6b) is connected in parallel with the shunt winding (l4), such that transformer impedance variation, which is caused when the tap position is changed over, is limited.
IPC 1-7
IPC 8 full level
H01F 29/02 (2006.01); H01F 30/02 (2006.01)
CPC (source: EP)
H01F 29/02 (2013.01); H01F 30/02 (2013.01)
Designated contracting state (EPC)
DE IT SE
DOCDB simple family (publication)
EP 0254946 A1 19880203; EP 0254946 B1 19911016; DE 3773785 D1 19911121; JP H0588523 B2 19931222; JP S6333804 A 19880213
DOCDB simple family (application)
EP 87110097 A 19870713; DE 3773785 T 19870713; JP 17659786 A 19860729