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Abb Power Grids Switzerland Ag

Hitachi Energy Switzerland Ag

Javier Mantilla

Stephan Grob

Nicola Gariboldi

Mathias-Dominic Buergler

Oliver Cossalter

Navid Mahdizadeh

Thomas Alfred Paul

Patrick Stoller

Francia Galindo-Lozano

Sami Kotilainen

Francesco Pisu

Olaf Hunger

Axel Kramer

Per Skarby

Max Claessens

Nitesh Ranjan

Xiangyang Ye

Jasmin Smajic

Eric Killer

Hubert Brändle

Max-Steffen Claessens

Mahesh Dhotre

Timo Kehr

Peter Stengard

Judith Kessler

Daniel Ohlsson

Mathias Ingold

Malena Bergsblom

Claudio Manzoni

Ryan-Gerald Anderson

Jurg Nufer

Franceso Pisu

Nicola Garbiboldi

An apparatus for heating an insulation fluid in a medium-voltage or high-voltage switchgear comprises an infrared source which is adapted to emit infrared radiation of at least one wavelength. Thus, at least one vibrational or rotational mode of at least one component of the insulation fluid is excited by absorption of at least a part of the infrared radiation, and condensation of the insulation fluid is efficiently prevented by this direct heating of the insulation fluid. A closed loop temperature regulator is used to heat only when required. A circulator in a heating chamber further provides for a mixing of the insulation fluid, thus preventing steep temperature gradients.

Insulation fluid heating apparatus and method

The present application relates to an apparatus for the generation, transmission, distribution and/or usage of electrical energy, the apparatus including a housing enclosing an insulation space and an electrically conductive part arranged in the insulation space, wherein the insulating space contains a dielectric fluid including carbon dioxide and oxygen. In the apparatus an oxidation catalyst is arranged that includes noble metal particles coated onto or embedded into a carrier and serves for the catalytic oxidation of carbon monoxide to carbon dioxide.

Apparatus for the generation, transmission, distribution and/or the usage of electrical energy, in particular electrical switching device

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 circuit breaker including an ejection device with a compartment, in which an arc-extinction medium for improving circuit breaker operation is contained, and having an ejection orifice through which the arc-extinction medium is to be ejected, wherein the ejection orifice opens out into an injection zone of the circuit breaker in which the pressure is lower than in an arcing zone when an arc is present, and wherein the arc-extinction medium and/or exhaust-cooling medium is at least partially present in liquid form, when it is contained in the ejection device.

Circuit breaker with fluid injection

A circuit breaker including an ejection device including an arc-extinction medium for improved extinction of an arc formed during a breaker operation and an exhaust-cooling medium for improved cooling of exhaust gases in the circuit breaker. Thereby, the arc-extinction liquid includes an organofluorine compound having a boiling point Tat 1 bar higher than &#x2212;60&#xb0; C. and being selected from the group of: a fluoroether; a fluoroamine; a fluoroketone; and mixtures thereof.

A dielectric insulation medium including sulphur hexafluoride (SF6) and/or tetrafluoro methane (CF4), in a mixture with at least one further component being an at least partially fluorinated fluoroketone.

Dielectric insulation medium

A gas-insulated high-voltage switch for the interruption of large currents includes a housing, a contact arrangement which is arranged in the housing and has two switching pieces which can be moved relative to one another along an axis. Each switching piece has a rated current contact and an arcing contact. The switch includes a drive which acts on a first of the two switching pieces. The switch includes a device configured to detect and indicate the contact wear of the two arcing contacts caused by the action of the arc. The device has an indicator arranged outside the housing. In the switch, the remaining life which is determined by the contact wear of the arcing contacts is detected and indicated by a simple mechanical mechanism. The device has a transmission mechanism which is fed through the housing in a gas-tight manner and a drive member coupled to the operating element.

Gas-insulated high-voltage switch for interruption of large currents

A circuit breaker is provided which can be filled with a quenching gas and which has two contact arrangements, which can be moved relative to one another and along a longitudinal axis of the circuit breaker. The contact arrangements form a arcing contact system and a rated current contact system connected electrically in parallel with it. One of the contact arrangements includes inner rated current contacts and outer rated current contacts of the rated current contact system, where the inner rated current contacts overhang the outer rated current contacts in the direction of the longitudinal axis, and the outer rated current contacts coaxially surround the inner rated current contacts. The circuit breaker has a high current carrying capability as well as a reliable switching-on and -off behavior, such as during and after the occurrence of a short-circuit current in the circuit breaker.

Circuit breaker with parallel rated current paths

A dielectric insulation medium including a fluoroketone containing 5 carbon atoms, in a mixture with a dielectric insulation gas component different from the fluoroketone, in particular air or an air component, the dielectric insulation medium, in particular the dielectric insulation gas, having a non-linearly increased dielectric strength that is larger than a sum of dielectric strengths of the gas components of the dielectric insulation medium.

A simplified construction of a gas-insulated high-power circuit breaker with a saving of components is achieved by at least one hole and at least one leaf spring, which is fastened on one side and is elastically bendable in dependence upon the pressure of the insulating gas in the compression volume, being formed in a valve plate of the valve. The bendable spring closes off the hole when the circuit breaker closes and opens it when the circuit breaker opens as soon as the pressure of the compressed insulating gas in the compression volume exceeds the value of the gas pressure in the low-pressure chamber by at least two bar.

Gas-insulated high-voltage power circuit breaker

A high-voltage switch includes a contact arrangement having two arcing contacts, one of which is supported displaceably against the action of a pretensioned spring. When the contact arrangement is closed, the free ends of the two arcing contacts are supported on one another. When the contact arrangement is opened, the two arcing contacts separate and during this process an arcing zone, accommodating compressed arc gas, is produced which is limited axially by free ends of the two arcing contacts and radially by an insulating nozzle toward the outside. To prevent the displaceably supported arcing contact from returning against the action of the pretensioned spring when a large short-circuit current is interrupted, the switch includes a piston/cylinder system functioning as a restoring device, which communicates with the arcing zone and which, with increasing pressure of the compressed arc gas produced in the arcing zone, generates a restoring force supporting the repelling force of the pretensioned spring.

Gas-insulated high-voltage switch

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Baden, Switzerland

Javier Mantilla