Abstract:
The present invention relates to a circuit breaker comprising an ejection device (8, 9; 80, 90) comprising a compartment (14a), in which an arc-extinction medium (18; 18a, 18b) for improving circuit breaker operation is contained, and having an ejection orifice (17) through which the arc-extinction medium (18; 18a, 18b) is to be ejected, wherein the ejection orifice (17) opens out into an injection zone (5, 6, 71) of the circuit breaker (1) in which the pressure is lower than in an arcing zone (32) when an arc is present, and wherein the arc-extinction medium (18; 18a, 18b) and/or exhaust-cooling medium (18; 18a, 18b) is at least partially present in liquid form, when it is contained in the ejection device (8, 9; 80, 90).
Abstract:
The present invention relates to a circuit breaker comprising an ejection device (8, 9; 80, 90) comprising an arc-extinction medium (18; 18a, 18b) for improved extinction of an arc formed during a breaker operation and an exhaust-cooling medium (18; 18a, 18b) for improved cooling of exhaust gases in the circuit breaker (1). Thereby, the arc-extinction liquid (18; 18a, 18b) comprises an organofluorine compound having a boiling point T b at 1 bar higher than -60°C and being selected from the group consisting of: a fluoroether; a fluoroamine; a fluoroketone; and mixtures thereof.
Abstract:
The present invention relates to a device for interrupting non-short circuit currents only, and in particular relates to a disconnector, more particularlyhigh voltage disconnector, or to an earthing switch, more particularly make-proof earthing switch, and further relates to a low voltage circuit breaker. The device comprises at least two contacts (10, 12) movable in relation to each other between a closed state and an open state and defining an arcing region(26),in which an arc (27) is generated during a current interrupting operation and in which an arc-quenching medium (17) comprising an organofluorine compound is present. According to the invention, a counter-arcing component (19) is allocated to the arcing region(26), the counter-arcing component (19) being designed for counteracting the generation of an arc (27) and/or being designed for supporting the extinction of an arc(27).
Abstract:
The present invention relates to a method for diagnosing, monitoring and/or predicting a condition of a switching apparatus, the switching apparatus containing an insulation medium comprising at least one organofluorine compound C1, said method comprising the steps of : a) selecting at least one physical quantity x of the insulation medium; b) determining the difference between value x so of the physical quantity x at initial state S0 of the apparatus and value x S1 of the physical quantity x at second state S1, with SI being later in time than S0, and c) deducing from the difference between x so and x S1 the decrease in amount of the organofluorine compound C1 and/or the total amount of the organofluorine compound C1, wherein the physical quantity x is the amount of a decomposition product C2 of the organofluorine compound CI or a physical quantity dependent thereon.
Abstract:
The present invention relates to an apparatus for the generation, the distribution or the usage of electrical energy, said apparatus comprising a housing enclosing an insulating space and an electrical component arranged in the insulating space. The insulating space contains a dielectric insulation gas comprising an organofluorine compound A. The apparatus further comprises a molecular sieve arranged such as to come into contact with the insulation gas. The molecular sieve has an average pore size y greater than the molecular size of at least one decomposition product of the organofluorine compound A generated during operation of the apparatus. The adsorption capability of the molecular sieve for organofluorine compound A is lower than for the at least one decomposition product. According to the invention, the apparatus further comprises at least one desiccant arranged such as to come into contact with the insulation gas.
Abstract:
Circuit breaker comprising two contacts (1, 2), a pressurization chamber (5), a nozzle arrangement (6) designed to blow an arc (8) in a quenching region (3), with a narrowest passage of a pressurization chamber outflow channel (71) to be passed by outflowing quenching gas (4) defining a pressurization chamber outflow limiting area A pc , a narrowest passage of a nozzle channel (63) to be passed by outflowing quenching gas (4) defining a nozzle outflow limiting area A n , the smaller area of which defining an absolute outflow limiting area A, with quenching gas (4) having a global warming potential lower than the one of SF6 over an interval of 100 years; wherein a ratio of the pressurization chamber outflow limiting area A pc to the nozzle outflow limiting area A n is less than 1.1:1.
Abstract:
The present invention relates to a process for providing a contamination-reducing(5)component to an electrical apparatus(1), said electrical apparatus (1) comprising a housing (2) enclosing an insulating space (3) and an electrical component (4) arranged in the insulating space(3), said insulating space (3) comprising an insulation medium which comprises or consists of carbon dioxide. The process comprises the steps of presaturating the contamination reducing component (5) with carbon dioxide before placing it inside the electrical apparatus (1).
Abstract:
The present invention relates to an electrical insulator (2, 2') for an electrical apparatus, said insulator (2, 2') comprising a body (4, 4') containing an electrical insulating solid material (6) and non-solid inclusions (8) dispersed within the body (4, 4'). According to the invention, at least a portion of the inclusions (8) comprise at least one organofluorine compound having a lower Global Warming Potential than SF 6 .
Abstract:
Circuit breaker comprising two contacts (1, 2), a pressurization chamber (5), a nozzle arrangement (6) designed to blow an arc (8) in a quenching region (3), with a narrowest passage of a pressurization chamber outflow channel (71) to be passed by outflowing quenching gas (4) defining a pressurization chamber outflow limiting area A pc , a narrowest passage of a nozzle channel (63) to be passed by outflowing quenching gas (4) defining a nozzle outflow limiting area A n, the smaller area of which defining an absolute outflow limiting area A,with quenching gas (4) having a global warming potential lower than the one of SF 6 over an interval of 100 years; characterized by equation V/A = k∙c sound (T=300K), with V =total volume of pressurization chamber (5), A=absolute outflow limiting area, c sound (T=300K) =speed of sound of quenching gas (4) at 300 K, and 5 ms =
Abstract:
The present invention relates to a circuit breaker comprising an ejection device (8, 9; 80, 90) comprising an arc-extinction medium (18; 18a, 18b) for improved extinction of an arc formed during a breaker operation and an exhaust-cooling medium (18; 18a, 18b) for improved cooling of exhaust gases in the circuit breaker (1). Thereby, the arc-extinction liquid (18; 18a, 18b) comprises an organofluorine compound having a boiling point T b at 1 bar higher than -60°C and being selected from the group consisting of: a fluoroether; a fluoroamine; a fluoroketone; and mixtures thereof.