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公开(公告)号：US10242826B2
公开(公告)日：2019-03-26
申请号：US15747832
申请日：2016-06-17
Applicant: ABB Schweiz AG
Inventor： Elisabeth Lindell , Lars Liljestrand , Stefan Halén
Abstract: An electric power distribution switchgear is connected between an electric power grid and an electric power equipment. The switchgear includes a synchronized vacuum switching apparatus configured to break the current to the electric power equipment using a synchronized technique to avoid re-ignition during the breaking and thus any transients caused by such re-ignition; and a surge arrester arrangement connected to the electric power equipment, the surge arrester arrangement being designed and configured to only handle transients caused by the current chopping at the breaking. The surge arrester arrangement can be arranged remote from the electric power equipment, such as e.g. in the same casing as the synchronized vacuum switching apparatus.
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公开(公告)号：US10177557B2
公开(公告)日：2019-01-08
申请号：US15735445
申请日：2015-06-12
Applicant: ABB SCHWEIZ AG
Inventor： Robert Saers , Lars Liljestrand , Tomas Tengner , Jesper Magnusson
Abstract: A passive electronic fuse for protecting a DC application in the event of a fault includes a first leg including a first winding of a mutual inductor and a switch device connected in series, a second leg including a second winding of the mutual inductor. The first leg and the second leg are connected in parallel and a self-inductance of the second winding is lower than a self-inductance of the first winding. The second leg further includes a capacitor connected in series with the second winding of the mutual inductor, and the switch device is a thyristor or a switch device with switching properties of a thyristor.
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Patent Agency Ranking
公开(公告)号：US11075036B2
公开(公告)日：2021-07-27
申请号：US16641547
申请日：2018-06-20
Applicant: ABB Schweiz AG
Inventor： Elisabeth Lindell , Andrea Bianco , Andrea Ricci , Lars Jonsson , Stefan Halén , Lars Liljestrand
Abstract: The present invention relates to a method for controlling a motor-driven vacuum circuit breaker. The method comprises initiate opening (S100) the circuit breaker, wherein the circuit breaker moves with an average opening speed of a contact pair of the circuit breaker, from a closed position to an open position of the circuit breaker, and decelerating (S110) the opening speed of the contact pair to below the average opening speed before the open position is reached to avoid overshoot, and initiate closing (S120) the circuit breaker, wherein the circuit breaker moves with an average closing speed of the contact pair, from the open position to the closed position, and decelerating (S130) the closing speed of the contact pair to below the average closing speed before contact touch at the closed position, wherein the circuit breaker moves with the decelerated speed at contact touch. A motor-driven vacuum circuit breaker, a computer program and a computer program product are also presented.
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公开(公告)号：US09824800B2
公开(公告)日：2017-11-21
申请号：US14945918
申请日：2015-11-19
Applicant: ABB Schweiz AG
Inventor： Bernhard Doser , Peter Dubach , Felix Greuter , Elisabeth Lindell , Lars Liljestrand
Abstract: A multi-terminal surge arrester which includes an active part extending along a longitudinal direction of the surge arrester, a first electrode resting against a first end of the active part, and a second electrode resting against a second end of the active part, which second end opposes the first end in the longitudinal direction of the surge arrester. The surge arrester further includes an insulating fixing device mechanically connecting and fixing the first electrode and the second electrode, and an insulating housing arranged around the active part. The active part includes at least two metal-oxide based varistor elements and a further electrode arranged between the at least two varistor elements, which further electrode provides an externally accessible electrical connection. Therein, the surge arrester is adapted for being insulated by surrounding air.
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公开(公告)号：US11145470B2
公开(公告)日：2021-10-12
申请号：US16641547
申请日：2018-06-20
Applicant: ABB Schweiz AG
Inventor： Elisabeth Lindell , Andrea Bianco , Andrea Ricci , Lars Jonsson , Stefan Halén , Lars Liljestrand
Abstract: The present invention relates to a method for controlling a motor-driven vacuum circuit breaker. The method comprises initiate opening (S100) the circuit breaker, wherein the circuit breaker moves with an average opening speed of a contact pair of the circuit breaker, from a closed position to an open position of the circuit breaker, and decelerating (S110) the opening speed of the contact pair to below the average opening speed before the open position is reached to avoid overshoot, and initiate closing (S120) the circuit breaker, wherein the circuit breaker moves with an average closing speed of the contact pair, from the open position to the closed position, and decelerating (S130) the closing speed of the contact pair to below the average closing speed before contact touch at the closed position, wherein the circuit breaker moves with the decelerated speed at contact touch. A motor-driven vacuum circuit breaker, a computer program and a computer program product are also presented.
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公开(公告)号：US20200266008A1
公开(公告)日：2020-08-20
申请号：US16641547
申请日：2018-06-20
Applicant: ABB Schweiz AG
Inventor： Elisabeth Lindell , Andrea Bianco , Andrea Ricci , Lars Jonsson , Stefan Halén , Lars Liljestrand
Abstract: The present invention relates to a method for controlling a motor-driven vacuum circuit breaker. The method comprises initiate opening (S100) the circuit breaker, wherein the circuit breaker moves with an average opening speed of a contact pair of the circuit breaker, from a closed position to an open position of the circuit breaker, and decelerating (S110) the opening speed of the contact pair to below the average opening speed before the open position is reached to avoid overshoot, and initiate closing (S120) the circuit breaker, wherein the circuit breaker moves with an average closing speed of the contact pair, from the open position to the closed position, and decelerating (S130) the closing speed of the contact pair to below the average closing speed before contact touch at the closed position, wherein the circuit breaker moves with the decelerated speed at contact touch. A motor-driven vacuum circuit breaker, a computer program and a computer program product are also presented.
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公开(公告)号：US09882373B2
公开(公告)日：2018-01-30
申请号：US14550394
申请日：2014-11-21
Applicant: ABB Schweiz AG
Inventor： Elisabeth Lindell , Lars Liljestrand , Felix Greuter
CPC classification number: H02H9/005 , H01F27/343 , H01F27/40 , H02H9/04
Abstract: A system for transient over voltage protection of a three-phase transformer. Two surge arresters are series connected across each winding of the transformer and the center point connection of the two surge arresters is electrically connected to a middle location of the winding. Three additional surge arresters are electrically connected from each phase to ground in the case of either a delta or Y connected transformer; and/or connected from a neutral point to ground in the case of a Y connected transformer. The system allows for all of the surge arresters to be packaged as an integrated surge arrester system to minimize induced transient over voltages and high stresses on the transformer winding due to internal resonances.
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