Abb Schweiz Ag

Abb Research Ltd.

Abb Ab

Abb Technology Ltd

Ola Jeppsson

James Mannekutla

Elisabeth Lindell

Lars Paulsson

Erik Doré

Henrik Breder

Jan H Johansson

Stefan Valdemarsson

Stefan Halén

Per Halvarsson

Edgar Dullni

Åke Öberg

Liwei Wang

Filippo Chimento

Tomas Hansson

Jian Qin

Stefan Halen

Lars Banghammar

Hans Begge

Maria Bijlenga

An arc quenching device for a three-phase electrical switchgear. The device includes a first busbar, a second busbar and a third busbar, each of a respective phase of the three-phase switchgear. The device also includes a first piston and a second piston, each of an electrically conductive material. The device also includes at least one pyrotechnical actuator arranged with the first and second pistons to axially move each of the first and second pistons if the at least one pyrotechnical actuator is fired. The first and second pistons are arranged in relation to the first, second and third busbars such that said axial movement brings the first piston into contact with both the first busbar and the second busbar, and the second piston into contact with both the first busbar and the third busbar.

Three-phase arc quenching device with two pistons

An arc quenching device for a three-phase electrical switchgear. The device includes a first busbar, a second busbar and a third busbar, each of a respective phase of the three-phase switchgear. The device also includes at least one piston of an electrically conductive material and having a tapered shape, tapering towards its front end. The device also includes only one pyrotechnical actuator arranged to, when the pyrotechnical actuator is fired, axially move each of the at least one piston until all of the first, second and third busbars are short-circuited to each other via the at least one piston.

Three-phase arc quenching device operated by one actuator

An electrical short-circuiting closing switch including an electrically insulating housing; a first electrode having a tapered first electrode opening; a second electrode having a tapered second electrode opening; a movable contact having a tapered profile, the movable contact being movable relative to the housing along a closing axis from an open position, in which the movable contact is electrically disconnected from the second electrode, to a closed position, in which the movable contact electrically connects the first electrode and the second electrode by engaging the tapered profile with the first electrode opening and the second electrode opening; and an actuator arranged to force the movable contact from the open position to the closed position; wherein at least one of the first electrode and the second electrode is flexibly attached to the housing. A switchgear including a closing switch is also provided.

Closing switch and switchgear

A bypass switch provides a bypass path between a first terminal and a second terminal. The bypass switch includes: a first contact device; a second contact device; and a plunger being moveable from an initial state, via a first state, to a second state, wherein in the initial state the first terminal and second terminal are conductively separated; in the first state a movement of the plunger causes the first contact device to close a first conductive connection between the first terminal and the second terminal; and in the second state the plunger mechanically forces the second contact device to close a second conductive connection between the first terminal and the second terminal.

Bypass switch comprising a plunger, a first contact device and a second contact device

A bypass switch provides a bypass path between a first terminal and a second terminal. The bypass switch includes: a first set of electrical contacts respectively connected to the first terminal and the second terminal; a second set of electrical contacts respectively connected to the first terminal and the second terminal; and a movable member. The movable member includes a first conductive section, a second conductive section and an insulator between the first conductive section and the second conductive section, wherein the movable member is movable from an initial state, via a first state, to a second state, wherein in the initial state the first set of electrical contacts are conductively separated and the second set of electrical contacts are conductively separated, in the first state the first set of electrical contacts are conductively connected via the first conductive section and the second set of electrical contacts are conductively separated, and in the second state the second set of electrical contacts are conductively connected via the second conductive section.

Bypass switch comprising a movable member with a first conductive section and a second conductive section

A switch assembly is disclosed for use in a circuit configured to carry a current between a first electrical conductor and a second electrical conductor. The switch assembly includes at least a first current path and a second current path, each of which includes an electrical contact which can be selectively connected to or disconnected from the second electrical conductor. At least one of the first current path and the second current path is configured such that it has a frequency-dependent reactance or impedance so as to force or cause current with a frequency which complies with a selected frequency criterion and which flows between the first electrical conductor and the second electrical conductor to flow, at least to a greater extent, via a selected one of the first current path and the second current path.

Switch assembly for use in a power transmission system

A mechanical switch in the form of a bypass switch assembly is arranged between two electrical conductors (busbars) and stays open during normal operation. When a cell fault happens, the fault and bypass information is transmitted to an actuator (acting as a trigger circuit) which activates inter alia a gas generator producing huge volume of gas in a very short time. The gas pressure pushes a movable member to bridge the two electrical conductors with ultrafast speed.

Bypass switch assembly

A device for quick closing of an electric circuit having a main spark gap with main electrodes and a triggering device. The triggering device has an auxiliary spark gap with auxiliary electrodes for igniting an arc in the main spark gap. The auxiliary electrodes are shielded from the main spark gap by a shielding unit having channel means extending therethrough from an auxiliary spark gap facing side to a main spark gap facing side of the shielding unit. The device further includes a nozzle with a first end being most close to the auxiliary spark gap and a second end most close to the main spark gap. The first end has an inlet opening that is in connection with the channel means and the second end has an outlet opening. The invention also relates to a corresponding method and to a use of the device.

Device and method for quick closing of an electric circuit and a use of the device

A device for switching in and out a load with respect to an alternating voltage feeder has two mechanical switches connected in series in a current path between the load and the feeder and each having a by-pass branch with at least one member with ability to block current therethrough in at least a blocking direction and conduct current therethrough in at least one direction. A unit is adapted to control a procedure of a switching out and switching in by synchronization with the current in the feeder and the voltage of the feeder, respectively.

Switching device, use thereof and a method for switching

A device for quick closing of an electric high-voltage circuit. A main spark gap is provided with a first and a second main electrode, and a triggering device. The triggering device includes an auxiliary electrode gap provided with a first and a second auxiliary electrode and is adapted, where necessary, to generate an arc in the auxiliary spark gap for igniting an arc in the main spark gap. Each auxiliary electrode is provided with a guide rail designed such that the arc, via the guide rails and under the influence of the generated inherent magnetic field, moves into the main spark gap. The two guide rails each have a length that is larger than the width of the auxiliary spark gap. The auxiliary electrodes are adapted so as to be protected from the effect of plasma formed in the main spark gap. A hermetic enclosure encloses the main spark gap and the auxiliary spark gap.

Growing community of inventors

Västerås, Sweden

Ola Jeppsson