Abstract: Power switches are provided with measures for preventing a recommendation of the arc from the secondary current path to the main current path and/or measures for returning the current limiter during the recommutation of the light art. A corresponding arrangement for carrying out the method is provided with means in the power switch and/or current limiter for preventing a switch failure of the current limiter disposed in the secondary current path of the power switch. The current limiter can be especially a PTC current limiter.

Abstract: A method of operating a combustor (10), to provide intimately mixed hot combusted gas (44) for a gas turbine (46), includes feeding gaseous oxidant (12) and gaseous fuel (16) into the combustor (10) near a combustion flame (28) which has a tip end (39) and a root end (29), where corona discharge occurs through adjustment of an electric field (34), and where the corona discharge causes ionized particles (36) to form and also causes intimate turbulent mixing of the gases.

Abstract: A method and device are for influencing combustion processes, and include an electrical device. The electrical device engages with the flame front so that the electrical field thus produced, only penetrates areas of the flame front in which a stabilizing and harmful-substance-reducing effect is produced. The electrodes of the burner are arranged outside the region of the flame in the associated device.

Abstract: A method and device are for influencing combustion processes, and include an electrical device. The electrical device engages with the flame front so that electrical field thus produced, only penetrates areas of the flame front in which a stabilizing and harmful-substance-reducing effect is produced. The electrodes of the burner are arranged outside the region of the flame in the associated device.

Abstract: Methods for operating a power switch with at least one main current path and associated secondary current path with an arc extinguisher are known from the art. A current limiter can be used which switches from non-current limiting operation to the current limiting operation at high current loads. The invention is characterized by measures for returning the current limiter during the transition from the current limiting operation to the non-current limiting operation. Specifically power switches are provided with measures for preventing a recommutation of the arc from the secondary current path to the main current path and/or measures for returning the current limiter during the recommutation of the light art. A corresponding arrangement for carrying out the inventive method is provided with means (30 to 50) in the power switch (20) and/or current limiter (1) for preventing a switch failure of the current limiter (1) disposed in the secondary current path of the power switch (20).

Abstract: Powder aerosols are introduced into a gas stream in metered form and without any aggregates. To this end, according to the invention, a powder is drawn, for example by mechanical device, from a reservoir area and is converted into a powder aerosol which is introduced within a flowing gas stream into a container to which ultrasound is applied. The ultrasound breaks down powder lumps and aggregates, and the aerosol can be fed in a uniform, fine powder distribution within the gas stream to a plasma burner. Apparatus for carrying out this invention includes a feed tube (4) connected to a mechanical powder feed device (6), so that an aerosol containing the powder enters a vessel (10) containing the ultrasound horn (2). The method and the associated apparatus are used for the coating of components, preferably for applying a protective coating to a turbine blade.

Abstract: A current-limiting switch, with current connections and contacts, at least one of which is movable, having an associated drive, for opening the moving contact when a predefined electric current intensity is exceeded, are provided. The drive is a thermoelectric drive where a disk-shaped resistor body is present, in a closed housing made of insulating material, for high-intensity discharges, plurality of resistor bodies and associated electrode disks, acting as contacts, are connected electrically in parallel and mechanically in series in the housing made of an insulating material (1). This results in increased switching capacity with compact design.

Abstract: Such switches have current connections for contacts. One contact may be a fixed contact and the other contact may be a mobile contact. A drive opens the mobile contact when a predetermined electric current intensity is exceeded. The electric drive is a thermoelectric drive. For that purpose, the contacts (2,3) are arranged in a closed housing (1) made of an insulating material and a disk-shaped resistive member (4) is arranged between the contacts (2,3). A switch of this type may also be advantageously designed as a bistable limiter.

Abstract: A switching device including a measuring means for monitoring contact erosion, which is provided between a contact element and an associated contact support. The switching device includes an electrically insulated signal line, which is usable in individual and/or multiple contacts, is used as the measuring means, the signal line being integrated into a single monitoring circuit. In the switching device, there is arranged, between at least one of the contact elements and the associated contact support or in the contact material, an electrical conductor with insulator as the signal line, damage to or destruction of the insulator and/or the conductor being utilized to generate an external signal as an indication of the end of the service life of the contact element.

Abstract: Switching components with contact parts that are mounted on a contact carrier in a switch housing may include devices for monitoring the contact erosion. The contact carrier may be split (sub-divided) and contact parts can be slotted at the rear and mounted on the sub-divided contact carrier. Thus, the oscillation response (vibration response) of the contact carrier in particular can be used as a measure of the erosion of the contact parts.

Abstract: A gas-discharge switch for a low-pressure gas discharge contains at least two main electrodes. A distance d between the main electrodes and the pressure p of a working gas are selected so as to allow the igniting voltage to diminish with a rising product p.times.d. A hollow electrode, which is connected to a trigger voltage source, is allocated to the discharge gap. This hollow electrode is connected via an an anode resistor to the anode. Preferably, the hollow electrode can be additionally connected via a resistor to the cathode. With this refinement of the firing device, one achieves a pre-ionization inside the hollow electrode and a corresponding simplification of the firing device.

Abstract: A gas-discharge switch contains at least two main electrodes for a low-pressure gas discharge. A distance d between the main electrodes and the pressure p of a working gas are selected so as to allow the igniting voltage to diminish with a rising product p.times.d. According to the present invention, a hollow electrode, which is connected to a trigger voltage source, is allocated to the discharge gap. The main electrode facing the hollow electrode is provided with a central opening. Between this opening and the hollow electrode, a baffle plate for the ion current flow of the low-pressure gas discharge is configured with a pre-set clearance from the surface of the main electrode.

Abstract: A gas discharge switch that has at least two coaxial electrodes which are provided with coaxial holes and form in a central discharge region, a gas discharge path, and an insulating region at their edges. The spacing D in an axial direction of the electrodes is larger than the spacing d.sub.1 of the electrodes at the inner edge of a washer-like insulator in the insulating region. The electrodes are respectively connected to one of the flat sides of the insulator, and the spacing d.sub.1 is at least as large as the spacing d.sub.2 of the electrodes in a shielding region that is formed between the insulating region and the discharge region. A shield that shields the insulator from the discharge region is provided.

Abstract: A gas discharge switch that has at least two coaxial electrodes which are provided with coaxial holes and form in a central discharge region, a gas discharge path, and an insulating region at their edges. The spacing D in an axial direction of the electrodes is larger than the spacing d.sub.1 of the electrodes at the inner edge of a washer-like insulator in the insulating region. The electrodes are respectively connected to one of the flat sides of the insulator, and the spacing d.sub.1 is at least as large as the spacing d.sub.2 of the electrodes in a shielding region that is formed between the insulating region and the discharge region. A shield that shields the insulator from the discharge region is provided.