Abstract:
A method (30) for switching a contactor (1) is provided. The method (30) is performed by a control device (20) controlling a control voltage supplied to a coil (10) of the contactor (1), wherein the coil (10) is energized and de-energized to control the switching of the contactor (1). The method(30) comprises obtaining a delay time ΔT from a predetermined set of N values, wherein the obtained delay time ΔT is different than the preceding selected delay time ΔT, determining (31) a reference point of time, t1, based on the obtained delay time, ΔT, wherein a starting point, to, of the delay time ΔT is set in relation to a start-up of the method (30), estimating (32) a half period, Tp, of the control voltage, determining (33) a duration of a measuring interval, Tm, based on the estimated half period Tp of the control voltage, setting (34) starting point of a first measuring interval Tm based on the reference point of time t1, and setting starting points of subsequent measuring intervals equal to the end point of an immediately preceding measuring interval, obtaining (35) measurements on the control voltage for the duration of the measuring interval Tm, and switching (36) the contactor (1) based on the measurements obtained during the measuring interval Tm. A control device (20), computer program (23) and computer program product (22) are also provided.
Abstract:
The invention relates to a disconnector device (3) for disconnecting an electrical circuit, wherein the electrical circuit is switched by a contactor (2) between an open position and a closed position, the disconnector device (3) using the contactor (2) for disconnecting the electric circuit. The disconnector device (3) comprises means (7, 8; 9, 10) for locking the contactor (2) in the open position, in which open position contacts of the contactor (2) are in a first position disconnecting the electrical circuit. An arrangement (1) comprising the disconnector device (3) and a contactor (2) is also provided.
Abstract:
The present disclosure relates to an arc extinguishing chamber (170) for a switching device (100) comprising an arcing contact unit (160, 150, 140) and a main contact unit (165, 130, 120), each of the contact units including a movable contact (150, 130) and a stationary contact (140, 120), the arc extinguishing chamber (170) comprising a plurality of arc splitters (172) disposed with a distance to each other, each of the arc splitters (172) including a pair of arms and the plurality of arc splitters is arranged to form a passage (P) for the movable arcing contact, wherein the passage has a height. The height of the passage is adapted such that, when a current is switched off/ interrupted, the separation distance (h) of the arc contacts is longer than the one (H) of the main contacts and the movable arcing contact moves within the passage during the most part of the separation distance (h).
Abstract:
The present disclosure relates to switching device (1, 100, 200) for breaking an electric current comprising a main contact carrier (65, 165, 265), a movable main contact (30, 130, 230) and a stationary main contact (20, 120, 220), wherein the movable main contact (30, 130, 230) is attached to the main contact carrier (65, 165, 265), an arcing contact carrier (60, 160, 260), a movable arcing contact (50, 150, 250) and a stationary arcing contact (40, 140, 240), wherein the movable arcing contact (50, 150, 250) is attached to the arcing contact carrier (60, 160, 260) and the stationary arcing contact (40, 140, 240) is arranged in parallel with the stationary main contact (20, 120, 220), and an actuating unit (10, 110, 210) for actuating the main and arcing contact carriers (65, 165, 265; 60, 160, 260) from an open position to close position or vice versa at a actuating distance, wherein there are separation distances between the stationary and movable contacts of the main and arcing contact units respectively when the current is interrupted. The switching device further includes a first rack (90, 190, 290) and a first gear (80, 180, 280) for actuating the arcing contact carrier (60, 160, 260) so that, when interrupting the current, a separation distance between the arcing contacts (50, 150, 250; 40, 140, 240) is longer than a separation distance between the main contacts (30, 130, 230; 20, 120, 220).
Abstract:
The present disclosure relates to a method of controlling a mechanical contactor (1) comprising at least one pair of contacts (2) for conducting a mains current (Im) when the contactor is in a closed position, and an electromagnet (4) arranged to close the contactor, and maintain the contactor in the closed position, by forcing the pair of contacts towards each other when a control current (Ic) runs through a coil (5) of the electromagnet. The method comprises, while the contactor is in the closed position, obtaining an indication of unintentional separation of the contacts, and in response to the obtained indication, opening the contactor and maintaining the contactor in an open position by turning off the control current.
Abstract:
An electromechanical switching device (10) for breaking an electric current, the switching device (10) comprising a stationary main contact (12); a movable main contact (14); a stationary arcing contact (16); a movable arcing contact (18), the stationary arcing contact (16) and the movable arcing contact (18) being arranged in parallel with the stationary main contact (12) and the movable main contact (14); an actuating arrangement (22) configured to move the movable main contact (14) and the movable arcing contact (18); and a magnetic member (30) arranged to generate a magnetic holding force in response to an electric current flow through the movable arcing contact (18) when the movable arcing contact (18) is in the closed position, the magnetic holding force acting on the movable arcing contact (18) in a direction against the stationary arcing contact (16).
Abstract:
A splitter plate (14) for an arc extinguishing chamber (12) in a switching device (10), the splitter plate (14) comprising a base portion (40); a pair of arms (30) extending from the base portion (40); a recess (34) for a movable contact (18) defined between the arms (30); and a slot (32) in each arm (30); wherein the recess (34) is arranged between the slots (32). An arc extinguishing chamber (12) for a switching device (10) is also provided. A switching device (10) for breaking an electric current, the switching device (10) comprising a plurality of splitter plates (14) or an arc extinguishing chamber (12) is also provided.
Abstract:
Embodiments of the present disclosure relate to a use of an alloy as a brazing alloy for an electric switch braze joint, an electric switch braze joint, an electric switch and a method of producing an electric switch braze joint. The alloy composition of said alloy consists of at least one element selected from each of group I and group II listed below, and a balance of impurities, Ag, and at least one of Cu, and Zn. Group I encompasses Cd, Mn, Ni, P, Sb, Si, Sn, Ti, and oxides thereof in a total amount of 0.5 to 45.0 wt.%. Group II encompasses Bi, Mo, Te, W, and oxides thereof, oxides of Cu and Zn in a total amount of 0.1 to 15.0 wt.%.
Abstract:
The present invention relates to an electromagnet device (1 ) for a switching apparatus, the electromagnet device comprising a coil (4) arranged to generate a magnetic flux through a magnetic circuit (M. M') when it is excited, a magnet yoke (2) having two lateral legs (20, 20') and an elongated base (22) including a central portion (24), and an armature (3) including a central leg (32) with a free end facing the central portion of the magnet yoke and is movable along a movement axis of the armature between a rest/open position and a working/closed position when operating the switching apparatus. The armature further comprises two arms (30, 30'), each of the arms (30, 30') including a portion (34, 34') extending along the movement axis (Y-axis) of the armature (3) towards the magnet yoke (2) such that, when the armature (2) is moving from the open position to the closed position, each of the extended portions (34, 34') moves in parallel adjacently along a corresponding lateral leg (20, 20') and a single working gap (40) is formed the free end of the central leg (32) of the armature (3) and the central portion (24) of the magnet yoke (2).
Abstract:
The present disclosure relates to an AC contactor (1), comprising a first fixed contact member (3a), a second fixed contact member (3b), a movable contact bridge member (5) mechanically connectable to the first fixed contact member (3a) and to the second fixed contact member (3b) simultaneously to allow current (i) to flow between the first fixed contact member (3a) and the second fixed contact member (3b), and which movable contact bridge member (5) is arranged to be moved away from the first fixed contact member (3a) and the second fixed contact member (3b) to obtain an open state of the AC contactor (1), and a first reverse-blocking semiconductor device (7) arranged to provide a current path (9) in the forward direction of the first reverse-blocking semiconductor device (7), in the open state of the AC contactor (1), from the first fixed contact member (3a) to the movable contact bridge member (5).