| (19) |
 |
|
(11) |
EP 0 541 078 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
22.09.1993 Bulletin 1993/38 |
| (43) |
Date of publication A2: |
|
12.05.1993 Bulletin 1993/19 |
| (22) |
Date of filing: 05.11.1992 |
|
|
| (84) |
Designated Contracting States: |
|
CH DE ES FR GB IT LI |
| (30) |
Priority: |
08.11.1991 SE 9103300
|
| (71) |
Applicant: ASEA BROWN BOVERI AB |
|
S-721 83 Västeras (SE) |
|
| (72) |
Inventor: |
|
- Akesson,Ulf
S-771 42 Ludvika (SE)
|
| (74) |
Representative: Boecker, Joachim, Dr.-Ing. |
|
Adelonstrasse 58
65929 Frankfurt am Main
65929 Frankfurt am Main (DE) |
|
| |
|
| (54) |
Polyphase high-voltage circuit breaker |
(57) The invention relates to a three-pole high-voltage circuit breaker with a device
for synchronous closing or opening in relation to the phase position of voltage or
current in the respective poles. The breaker has an operating mechanism with a rotary
shaft (5) which is common to all the poles. The necessary time-lag between the instants
of closing or opening in the different phases is brought about by mechanical means
by connecting the movable contact (2) in each pole to the common rotary shaft (5)
via an operating rod (3) and a crank lever (4) fixed to the shaft, the angle (α
R, α
S α
T) between the crank lever and the direction of movement of the movable contact in
one of the breaker poles differing in magnitude from the corresponding angle (α
R, α
S α
T) in at least one of the other poles. By mutual adaptation of the lengths of the three
crank levers (4), the same length of contact travel (s₁) in the different breaker
poles can be obtained.