Abstract:
The invention deals with a method and device for controlling the ignition of electric arc in the intercontact break of a disconnector during the operation of opening and closing the disconnector used in gas-insulated switchgear. The invention is characterized by the control of the supply of additional pulses of electromagnetic radiation energy to the intercontact break of the disconnector depending on instantaneous voltage values uS(t) measured on the incoming side of the disconnector or depending on instantaneous voltage values uS(t) on the incoming side of the disconnector and instantaneous voltage values uL(t) on the load side of the disconnector, with defined voltage threshold values (U1, U2) and preset time boundary values (T1, T3) during opening the disconnector or (T2, T4) during closing the disconnector, while the preset time values (T1, T3) include time moments in which the supply of energy pulses to the intercontact break is stopped, and the preset time values (T2, T4) include time moments in which supply of energy pulses to the intercontact break starts.
Abstract:
A gas-insulated type circuit breaker 1 comprises a housing (4) defining a gas volume for a dielectric insulation gas; a first arcing contact member (10) and a second arcing contact member (20), wherein the first arcing contact member (10) and the second arcing contact member (20) are movable relative to each other along an axis (2); a first nominal contact member (40) and a second nominal contact member (60), wherein the first nominal contact member (40) and the second nominal contact member (60) are movable relative to each other along the axis (2); and a first nominal contact shielding arrangement (50) comprising an inner shield member (52) and an outer shield member (54), wherein the inner shield member (52) and the outer shield member (54) are arranged coaxially about the axis (2). The first nominal contact member (40) is arranged co-axially between the inner shield member (52) and the outer shield member (54), and is movable relative to the inner shield member (52) and to the outer shield member (54).
Abstract:
The invention relates to an electrical switching device (1) for medium or high voltage circuits having at least a nominal contact arrangement, wherein the nominal contact arrangement comprises at least a first nominal contact comprising a plurality of contact fingers (6, 7) forming a finger cage concentric with respect to a longitudinal axis (z), wherein the contact fingers (6, 7) are separated from one another by empty slots (10, 8) extending up to a free end of the contact fingers (6, 7). The empty slots comprise first and second empty slots (10, 8), wherein the second empty slots (8) are shorter than the first empty slots (10), and wherein the contact fingers (6, 7) are grouped in groups (5), with the contact fingers (6, 7) of each group (5) being separated by second empty slots (8) and the contact fingers (6, 7) of adjacent groups (5) being separated by first empty slots (10).
Abstract:
The electrical switching device (1) has at least a nominal contact arrangement, wherein the nominal contact arrangement comprises at least a first nominal contact comprising a plurality of contact fingers (3a) forming a finger cage concentric with respect to a longitudinal axis (z), and at least a mating second nominal contact (3b), wherein at least one of the nominal contacts (3a, 3b) is movable parallel to the longitudinal axis (z) and cooperates with the other nominal contact (3b, 3a) for closing and opening the electric switching device (1). The electrical switching device further comprises a supporting tube (6) fitted into the finger cage and contacting the contact fingers (3a). The supporting tube (6) carries a plurality of spacers (7), each of which extends into a gap between two adjacent contact fingers (3a).
Abstract:
A DC current path (4) for DC power transmission comprises a switchable element (1). An inductance (2) is connected in series to the switchable element (1). When an interrupt scenario is detected, a resonance circuit (3) is connected in parallel to the series connection of the switchable element (1) and the inductance (2) for charging a capacitance (32) of the resonance circuit (3). An open state of the switchable element (1) is effected and the resonance circuit (3) is connected in parallel to the switchable element (1). By means of such arrangement and method, very favourable fast interrupt times can be achieved.
Abstract:
A high-voltage device (100) is provided that comprises a conducting element (121; 122; 123) for conducting high-voltage current and at least one transient reducing unit (130) for reducing voltage peaks of existing propagating very fast transients by the generation of arcing, the transient reducing unit having at least one arcing occurrence surface (131; 131a; 131b; 131c). The at least one arcing occurrence surface of the at least one transient reducing unit is positioned in the vicinity of the conducting element such that arcing occurs between the transient reducing unit and the conducting element when the potential difference between the transient reducing unit and the transient conducting element is above a threshold value, namely at the occurrence of a very fast transient. Further, a method is provided for equipping a high-voltage device with the transient reduction unit.
Abstract:
A DC current path (4) for DC power transmission comprises at least a first switching element (1) and a second switching element (2) connected in series. A resonance circuit (5) is adapted to be connectable in parallel to the series connection of the at least one first switching element (1) and second switching element (2) by means of a switch (53).
Abstract:
A high-voltage device (100) is provided that comprises a conducting element (121; 122; 123) for conducting high-voltage current and at least one transient reducing unit (130) for reducing voltage peaks of existing propagating very fast transients by the generation of arcing, the transient reducing unit having at least one arcing occurrence surface (131; 131a; 131b; 131c). The at least one arcing occurrence surface of the at least one transient reducing unit is positioned in the vicinity of the conducting element such that arcing occurs between the transient reducing unit and the conducting element when the potential difference between the transient reducing unit and the transient conducting element is above a threshold value, namely at the occurrence of a very fast transient. Further, a method is provided for equipping a high-voltage device with the transient reduction unit.