Abb Technology Ag

Abb Schweiz Ag

Abb Research Ltd.

Hitachi Energy Switzerland Ag

Axel Kramer

Detlef Pape

Navid Mahdizadeh

Klaus Bohnert

Frank Kassubek

Hubert Braendle

Jan Svensson

Yannick Maret

Thomas Alfred Paul

Kai Hencken

Nitesh Ranjan

Staffan Norrga

Frans Dijkhuizen

Stephan Grob

Uwe Drofenik

Patrick Stoller

Daniel Schrag

Javier Mantilla

Hubert Brandle

J Brian Leen

Mats Hyttinen

Oliver Cossalter

Mathias-Dominic Buergler

Urs E Meier

Göran Eriksson

Hubert Brändle

Eric Killer

John Brian Leen

Julio Danin Lobo

Max-Steffen Claessens

Gian-Luigi Madonna

Georg Mueller

Mathias Ingold

Francia Galindo-Lozano

Peter Terwiesch

Uwe Riechert

Laurindo De Salles Leal Filho

Malena Bergsblom

Ingold Mathias

Xu Du

Christian Spindler

Marco Rogerio Barrios

Thomas Paul

Jan R Svensson

A method for operating an ore comminution circuit is provided. The method includes obtaining at least one sensor signal related to an ore feed to the comminution circuit; determining a first ore grindability parameter of the ore feed from the at least one sensor signal, using a model; determining a second ore grindability parameter using parameters of the comminution circuit and/or of at least one comminution device in the comminution circuit; and updating the model with the second ore grindability parameter and the at least one sensor signal.

Method for operating a comminution circuit and respective comminution circuit

Systems and methods for measuring a value of constituents in a mixed constituent gas having at least one broad band absorber constituent therein and at least one lock constituent are provided. The system uses a combination of integrated cavity output spectroscopy and cavity ringdown spectroscopy to determine the measurement values of constituents in a cavity of a spectrometer. Cavity ringdown in the presence of the at least one broadband absorber constituent and a reference concentration value are used to determine the constituent measurement values when the spectral width of the laser tuning range is overlapped by the absorption band of the broad band absorber in the cavity.

Simultaneous integrated cavity output spectroscopy and ringdown measurements for the detection of broad band absorbing gas species

The application relates to a method for determining a property of a fluid component of a fluid present in a compartment of an electrical apparatus by means of a measurement device arranged outside the compartment and comprising a chamber for receiving a quantity of the fluid from the compartment. Amongst other steps of the method, an optical path in the chamber is illuminated by a light source and a first intensity of light is measured by a light detector. Then fluid is released from the compartment into the chamber and a second intensity (Ix) of light is measured. Based on these measurements the property of the fluid component is determined.

Method for determining a property of a fluid component of a fluid present in a compartment of an electrical apparatus

A method and device for estimating a density value &#x3c1;indicative of a true density &#x3c1; or for estimating a viscosity value &#x3b7;indicative of a true viscosity &#x3b7; of a fluid is disclosed. For this, a first resonance frequency fof a first mechanical oscillator in a reference volume and a second resonance frequency fof a second mechanical oscillator in contact with the fluid are measured. The estimated value &#x3c1;or &#x3b7;is then derived using these resonance frequencies fand f. During this derivation, at least one fluid-temperature- or fluid-pressure-dependent parameter of the fluid is used. Additionally or alternatively, the first (i.e. reference) mechanical oscillator is arranged in contact with a reference fluid. Thus, fundamental errors in the derivation of the estimated value &#x3c1;or &#x3b7;are reduced and the estimated value becomes more reliable.

Method for measuring a fluid density or a fluid viscosity

A method for deriving at least one operating parameter of a fluid-insulated electrical apparatus, in particular of gas-insulated switchgear. The operating parameter is dependent on a dielectric breakdown strength of an insulation fluid of the electrical apparatus. The insulation fluid includes at least three components that are assigned to at least a first and a second component group such that at least one component group comprises at least two components. The component groups differ in their weighted average values of the molecular masses of the components in the respective component groups. At least one quantity which is indicative of the concentration of the first component group and of the concentration of the second component group is determined from the insulation fluid, e.g. by measuring one or more measurement variables with one or more sensors. The operating parameter is then derived using the at least one quantity.

Method and device for determining an operating parameter of a fluid insulated electrical apparatus

An apparatus for the generation, the distribution or the usage of electrical energy, the apparatus including a housing enclosing an insulating space and an electrical component arranged in the insulating space. The insulating space contains a dielectric insulation gas including an organofluorine compound A. The apparatus further includes 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. The apparatus further includes at least one desiccant arranged such as to come into contact with the insulation gas.

Apparatus containing a dielectric insulation gas comprising an organofluorine compound

A monitoring device for determining the concentration of a dielectric insulation fluid such as a perfluoroketones in a room housing at least one high-voltage electrical apparatus and being accessible by humans essentially without modifying the room conditions, for example the room being a part of an air-insulated substation, with the monitoring system including one or more sensors for determining an emission and/or absorption of the dielectric insulation fluid molecules at at least one wavelength or wavelength band of the electromagnetic wave spectrum.

Device and method for monitoring rooms equipped with high-voltage apparatuses

A method and device for operating a fluid-insulated electrical apparatus. The insulation fluid of the electrical apparatus includes at least two components. The method includes the step of determining a physical state of the insulation fluid by measuring at least three measurement variables with sensors. The method further includes the step of deriving trend variables indicative of changes over time for the measurement variables and/or for characterizing variables. These characterizing variables are derived from the measurement variables by using a relating equation, such as an equation of state, and are also indicative of the physical state of the insulation fluid. By testing for specific patterns of the trend variables, an operating state of the electrical apparatus is determined. The possible operating states correspond to specific and distinguishable non-fault and fault scenarios for the electrical apparatus. Thus, operating states can be distinguished and trouble-shooting in case of a failure is simplified.

Method for operating an electrical apparatus

A converter building including at least one room having a solid room wall enclosing an interior space and an electrical active part contained in the interior space, the room wall having at least one opening, which is designed such that it allows a human to enter the interior space. The opening is sealable, the room wall encloses the interior space in a gas-tight manner when the opening is sealed, and the interior space contains a dielectric insulation medium including a dielectric insulation component other than air.

Converter building

A thermal mass flowmeter with a metal-encapsulated sensor system is provided. The sensor system included at least one heating resistor having a platelet geometry, and a sensor cap surrounding the at least one heating resistor. At least one distal end area of the sensor cap is formed with a flat rectangular cross section corresponding to the platelet geometry of the heating resistor, such that the distal end area of the sensor cap surrounds the heating resistor closely with an accurate fit (e.g., with a predetermined gap therebetween).

Thermal mass flowmeter with a metal-encapsulated sensor system

A method and an apparatus for diagnosis of a flowmeter are disclosed. The method includes thermally coupling a first sensor unit of the flowmeter to a fluid and thermally coupling a second sensor unit of the flowmeter to the fluid. The method also includes actively heating or cooling the first sensor unit by applying power to the first sensor unit such that its temperature is different from the temperature of the fluid, and simultaneously actively heating or cooling the second sensor unit by applying power to the second sensor unit such that its temperature is different from the temperature of the fluid, and typically from the temperature of the first sensor. The method can include determining a temperature TMof the fluid, and determining at least two independent quantities related to the heat transfer of the sensor units, each of the at least two independent heat transfer related quantities being determined from at least one element selected from the group including TM, TM, TM, PM, and PM, and determining a diagnosis result by setting into relation the at least two independent heat transfer related quantities.

Flowmeters and methods for diagnosis of sensor units

A pressure sensor is disclosed with at least one pressure sensing element, the pressure induced changes in the optical properties of which are evaluated by illumination with at least one light source. The pressure sensor can include at least two semiconductor-based pressure sensing elements located in individual pressure chambers, which sensing elements are located essentially adjacent to each other. The sensing elements can be irradiated with the same light source, wherein the light transmitted through the sensing elements is detected using at least two corresponding detectors, and wherein the differential pressure in the two pressure chambers is evaluated based on the output of these detectors.

Pressure sensor

A pressure sensor is disclosed wherein pressure induced changes in birefringent properties of an optical sensing element are read out by transmission of at least one light beam. The pressure sensor can include at least one single-material transparent body which is subjected to at least two different pressures (p, p) in at least two different regions via at least two pressure chambers. The transparent body can transmit by a parallel or minimally divergent light beam without total reflection in the body such that the pressure-induced birefringence and a corresponding differential phase shift between linear polarisation components of the light beam depends on a difference of the different pressures (p, p).

Growing community of inventors

Wettingen, Switzerland

Axel Kramer