公开(公告)号：EP3098827B1

公开(公告)日：2018-10-17

申请号：EP15169198.7

申请日：2015-05-26

申请人： ABB Schweiz AG

发明人： Carollo, Carlo ,  Tonin, Andrea ,  Ugolin, Gianmaria

IPC分类号： H01H33/55 ,  H01H35/40 ,  H01F27/40 ,  H01H36/02

CPC分类号： H01H33/555 ,  H01F27/402 ,  H01F2027/404 ,  H01H35/40 ,  H01H36/02

摘要： The present invention relates to a Buchholz relay (1) for the protection of oil insulated power electrical equipment, comprising: - a support frame (2) suitable to be in contact with the oil; - floating means (3) coupled with said support frame (2) and movable relative thereto; - switching means (4) operatively connected with said floating means (3) and suitable to enable/disable an alarm circuit and/or a trip circuit of said electrical equipment; - at least one flow vent device (5) coupled with said support frame (2) and operatively connected to said trip circuit, suitable to be affected by the oil flow and movable between a first position, in which the flow vent device (5) maintains said trip circuit disabled, and a second position, in which the flow vent device (5) enables said trip circuit; - contrast means (6) suitable to exert on the flow vent device (5) a contrast force suitable to maintain the flow vent device (5) in the first position until the oil flow speed does not exceed a predetermined oil flow speed threshold value, and to release the flow vent device (5) such that it reaches the second position when the oil flow speed exceeds said predetermined oil flow speed threshold value, The Buchholz relay (1) comprises a regulation device (19) suitable to act on the contrast means (6) and/or on the flow vent device (5) so to modify said contrast force.

公开(公告)号：EP3791951A1

公开(公告)日：2021-03-17

申请号：EP19196627.4

申请日：2019-09-11

申请人： ABB Schweiz AG

发明人： Ugolin, Gianmaria ,  Carollo, Carlo ,  Nucci, Francesca

IPC分类号： B01D53/04 ,  B01D53/26 ,  H01F27/14

摘要： A breather device (1) for dehumidifying air to be supplied into an expansion vessel of a power electrical apparatus, said breather device comprising:
- an air demoisturizer unit (2) including a first tank (2A) and a second tank (2B), each tank having an internal volume (20) accommodating a regenerable moisture absorbing substance and being in fluid-dynamic communication with the external environment;
- a main port (4) adapted to be in fluid-dynamic communication with said expansion vessel;
- a valve assembly (3) in fluid-dynamic communication with each tank (2A, 2B) and said main port (4).
Said valve assembly is adapted to take a first operating condition (C1), in which a flow of air coming from the first tank (2A) is allowed to reach said main port (4) and a flow of air coming from the second tank (2B) is prevented to reach said main port (4), or a second operating condition (C2), in which a flow of air coming from the second tank (2B) is allowed to reach said main port (4) and a flow of air coming from the first tank (2A) is prevented to reach said main port (4).
Said valve assembly is adapted to switch reversibly between said first and second operating conditions (C1, C2) in response to feeding signals (Fl, F2, F3) received from a power supply (50).
Said valve assembly is adapted to maintain stably said first operating condition (C1) or said second operating condition (C2) in case of outage of said power supply (50).

公开(公告)号：EP3789103A1

公开(公告)日：2021-03-10

申请号：EP19195300.9

申请日：2019-09-04

申请人： ABB Schweiz AG

发明人： Ugolin, Gianmaria ,  Carollo, Carlo ,  Nucci, Francesca

IPC分类号： B01D53/26 ,  B01D53/04 ,  H01F27/14

摘要： A breather device (1) for dehumidifying air to be supplied into an expansion vessel (103) of a power electrical device (100), said breather device comprising an air demoisturizer unit (2) including one or more tanks (21), each tank having an internal volume (20) accommodating a regenerable moisture absorbing substance and a heater (23) for regenerating said moisture absorbing substance, at least a first opening (25) configured to put the internal volume of said tank in fluid-dynamic communication with the external environment and at least a second opening (22) configured to allow a flow of air to exit from the internal volume of said tank towards another section of said breather device.
Each tank (21) comprises at least a third opening (24) in fluid-dynamic communication with the external environment and valve means (26) operatively associated to said third opening, said valve means (26) being configured to automatically allow or prevent a flow of air to pass through said third opening, depending on the internal temperature of said tank.

公开(公告)号：EP2514511B1

公开(公告)日：2019-07-31

申请号：EP11163153.7

申请日：2011-04-20

申请人： ABB Schweiz AG

发明人： Carollo, Carlo ,  Tonin, Andrea

IPC分类号： B01D53/26 ,  B01D53/04 ,  H01F27/14