Abstract:
The invention relates to a high-voltage circuit breaker. The contact system of said high-voltage circuit breaker has a contact (9) which is actuated by a switch mechanism and a counter-contact (7) which can be actuated by means of an auxiliary mechanism, said counter-contact (7) being opposite said contact (9). According to the invention, the parallel current path which passes via the auxiliary mechanism is interrupted between the counter-contact (7) and a second connection of the high-voltage circuit breaker by means of an insulating part.
Abstract:
Described is a high-voltage electrical switch with a contact piece (2, 21) made of carbon-fibre reinforced carbon (CFC). This material has sufficient mechanical stability as well as being extremely resistant to burning losses. In addition, the weight of the contact piece (2, 21) is low. Thus, when the contact piece is a driven one, savings in drive energy are made.
Abstract:
In a high-voltage power switch with an arc contact (1) and a spatially separate rated current contact (6), the moving part of the rated current contact (6) takes the form of an external hollow cylinder to delimit a storage space (11) for pressurised quenching gas. The hollow cylinder (10) is made of a one-piece precision casting of contact material, especially a CuCr alloy, the jacket of which is stiffened by three inwardly projecting flange-like projections (12, 13, 14). This design provides a light structure of a bridging circuit component for a rated current contact requiring comparatively little driving power for its operation.
Abstract:
The aim of the present invention is to control the electric field in the region of the switching path of a compressed gas switch with the aid of field electrodes. In a compressed gas switch (1) with two mutually coaxial contacts (5, 6) and hollow nozzles (8, 9) to remove extinguishing gas and a stationary cylindrical heating chamber (12) coaxially surrounding the nozzle gap (11) and communicating therewith, at least parts of the frontal limiting wall of the heating chamber (12) are formed by electrodes (15, 17) to control the electric field in the switching path. In addition there is a compression chamber (13) on the side of the heating chamber opposite the operating side of the switch (1). The invention is applicable to all compressed gas switches fitted with a heating chamber for the extinguishing gas.
Abstract:
In a compressed gas switch with a blowing device (5) consisting of a piston (6) and cylinder (7) and two separable switching components (1, 4) which are hollow in order to discharge the switching gas, one (1) of the switching components is fixed. In the "on" position, the latter penetrates a frontal aperture (8) in the cylinder (7). To reduce any gas loss on switching off, the frontal aperture (8) is bordered by a flexible sealing lip (9) made up in several parts by sections uniformly distributed about the periphery.
Abstract:
In an electric high-voltage power switch with two contacts (1, 3) and at least one gas outlet (13) for quenching gas heated by the arc and a cooling device (7) for cooling the quenching gas, the cooling device (7) for the quenching gas consists of a hollow conical metal body (7) with apertures for quenching gas, the axis of symmetry of which runs substantially along the gas outlet channel (13). The metal body consists, for example, of a wire braid, a sintered material or a perforated sheet. The quenching gas is efficiently cooled with low flow resistance.
Abstract:
The invention concerns an self blow-out switch having a compression device and in which a pressure chamber heated by electric-arc energy is connected to a compression space, optionally with valve control. The compression space is connected to the low-pressure space via a pressure-relief valve and a refill valve. The invention calls for the two valve discs of the valves, which are located between the compression space (8) and the low-pressure space (10), to be designed as two concentric washers (12, 13) of different dimensions, lying in direct contact with each other and partly overlapping each other, and integrated to form a single valve unit.
Abstract:
The invention concerns a compressed-gas circuit breaker with two coaxially disposed contacts (1, 2) at least one of which can be driven to move in the longitudinal direction, the two contacts delimiting in the break state a switch path (3). The circuit breaker also has a nozzle (4), made of insulating material, which is connected to the driven contact (2) and which surrounds at least part of the switch path (3). The invention calls for a high-strength plastic tube (9) lying coaxially against the outside of the insulating nozzle (4) in order to prevent said nozzle (4) from expanding radially as a result of an increase in quencher-gas pressure.
Abstract:
An electric high-voltage power switch has two contacts (1, 2) and at least one gas outlet (17) for quenching gas heated by the arc and a cooling device (12) for cooling the quenching gas consisting of a metal body (12) with through apertures (18) arranged in the flow path of the quenching gas. An insulating component (13, 14) impermeable to the quenching gas, is fitted in the gas outlet (17) in front of the metal body (12) viewed from the contacts (1, 2) and consists of a material (PTFE) releasing a quenching gas at high temperatures. Said insulating component (13, 14) is far enough away from the metal body (12) for the quenching gas to be able to pass through the aperture (18) substantially over the entire surface of the metal body (12).