EP 0230852 B1 19891102 - HYDRAULIC OPERATING MECHANISM FOR A CIRCUIT-BREAKER
Title (en)
HYDRAULIC OPERATING MECHANISM FOR A CIRCUIT-BREAKER
Publication
Application
Priority
DE 3545782 A 19851220
Abstract (en)
[origin: US4730092A] In a hydraulic driving device for an electric pressurized-gas switch, the piston-cylinder systems are responsive to pressure from a hydropneumatic pressure accumulator. The driving device is equipped with a hydraulic pump which feeds several pressure accumulators and is controlled by pressure monitors, and with a gas monitoring device for the pressure monitors. For solving the problem of carrying out indirect gas monitoring while feeding several pressure accumulators by one hydraulic pump instead of direct gas monitoring, there is provided at least one threshold switch for measuring the feed pressure of the hydraulic pump as part of the gas monitoring device. By feeding the pressure accumulators which takes place sequentially in time and is controlled on the one hand by the gas monitoring device and by the pressure monitors on the other hand, it is possible to establish a correlation specific as to the pressure accumulator of the gas loss signal delivered by the threshold switch.
IPC 1-7
IPC 8 full level
H01H 3/24 (2006.01); F15B 1/02 (2006.01); F15B 1/033 (2006.01); H01H 33/34 (2006.01); H01H 33/02 (2006.01)
CPC (source: EP US)
F15B 1/033 (2013.01 - EP US); H01H 33/34 (2013.01 - EP US); H01H 33/022 (2013.01 - EP US); H01H 2033/306 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
US 4730092 A 19880308; AT E47770 T1 19891115; DE 3545782 A1 19870625; DE 3666747 D1 19891207; EP 0230852 A1 19870805; EP 0230852 B1 19891102; IN 165463 B 19891028; JP S62157626 A 19870713
DOCDB simple family (application)
US 94084586 A 19861212; AT 86730206 T 19861205; DE 3545782 A 19851220; DE 3666747 T 19861205; EP 86730206 A 19861205; IN 915CA1986 A 19861216; JP 30272686 A 19861218