3m Innovative Properties Company

Other

Bernd Schubert

Jens Weichold

Mark Gravermann

Gerhard Lohmeier

Michael H Stalder

Friedrich A Busemann

Giuliano Bolcato

Michael Petry

Werner Roehling

Rainer Reeken

Dipankar Ghosh

Myungchan Kang

Christian Weinmann

Thomas Herdtle

Gunther Stollwerck

Christopher D Sebesta

Sebastian Eggert

Harald Westkamp

Pasquale J Zanoli

Andreea Sabo

Christine B Bund

Guenter M Zilligen

Johannes Fink

Gunther A J Stollwerck

Sebastian Eggert-Richter

Raymond Krabs

Rolf Karkowski

Attila Z Kis

Mirco Gunjaca

Willy A Ahlmann

Guenther A J Stollwerck

Gunther Aj Stollwerck

Gunther AJ Stollwerck

Giuliano Bolcatao

Michael Stadler

Voltage sensor () comprising a voltage divider () for sensing an AC voltage of a HV/MV power conductor (). For adjusting the common overall impedance of the low-voltage portion of the voltage divider towards a desired impedance, the low-voltage portion () comprises one or more low-voltage impedance elements (), a plurality of adjustment impedance elements () and a plurality of switches. In its connect state, each switch electrically connects an adjustment impedance element in parallel to at least one of the one or more low-voltage impedance elements (). The overall impedance of the high-voltage portion () and the overall impedance of the low-voltage portion () of the voltage divider () are adapted such that, by bringing one or more of the switches () into their connect state, the voltage divider () has, for an AC voltage of between 5 and 25 kV phase-to-ground and a frequency of between 40 and 70 Hertz, a dividing ratio of 3077, of 6154, of 6769 or of 10 000.

Adjustable voltage sensor

The invention relates to a sensor () for measuring a voltage in a HV/MV power network in a separable connector (), the sensor comprising: &#x2014;an adapter element () comprising a high voltage connection adapted to be mechanically and electrically coupled to a high voltage conductor () of the separable connector () and to receive HV/MV voltage from the separable connector, &#x2014;a sensor body () adapted to be mechanically and electrically coupled to the adapter element () and comprising a divider assembly () with a plurality of discrete impedance elements, which are electrically connected in series such as to be operable as a voltage divider for sensing a voltage and a low voltage connection () configured to provide a low voltage signal corresponding to a high voltage signal present in the HV/MV power network, wherein the adapter element () and the sensor body () are separate elements that are adapted to be installed to the separable connector (), wherein the adapter element is configured to be installed between the separable connector and the sensor body.

Sensor with discrete impedance elements for high voltage connectors

Elastic sleeve () for electrically insulating a HV/MV power conductor in a power network, comprising a) a shrinkable or expandable elastic sleeve body (); b) a receiving space () in the sleeve body, for receiving the power conductor; c) a cavity () formed in the sleeve body; and d) a divider assembly (), arranged, at least partially, in the cavity and comprising a plurality of discrete impedance elements, operable as a voltage divider for sensing a voltage of an inner conductor of the power conductor.

Elastic sleeve for a power conductor

The invention relates to a voltage sensing device for a high and/or medium-voltage power-carrying conductor, the voltages sensing device comprising: &#x2022; a carrier element () with a passageway for receiving the power-carrying conductor, &#x2022; wherein the carrier element comprises an electrode () extending in an axial direction of the passageway of the carrier element and operable as a first electrode of the voltage sensing device, wherein &#x2022; a conductor () of the power cable is operable as the second electrode of the voltage sensing device and wherein &#x2022; the carrier element has a coefficient of thermal expansion that is less than 5&#xd7;10^&#x2212;6 1/K at 20 C.

Voltage sensing device

Voltage sensor () for a high- or medium-voltage power-carrying conductor for a power network, such as an inner conductor of a power cable or a cable connector or a bus bar. The voltage sensor has a tubular shape and an axial passageway (), which can receive the conductor. The voltage sensing device comprises a) a radially-inner electrode (), operable as a first sensing electrode of a sensing capacitor for sensing the voltage of the power-carrying conductor, b) a radially-outer electrode (), operable as a second sensing electrode of the sensing capacitor, and c) a solid carrier element (), at least a first portion of which is arranged between the inner electrode and the outer electrode, the first portion being operable as a dielectric of the sensing capacitor. The sensor can be accommodated in a cable accessory. The carrier element may comprise ceramic material to increase accuracy.

Voltage Sensor

Cable connection device for connecting a power cable to an electrical installation of a power network, comprising a conductor element having a first end portion, a second end portion, and a middle portion disposed between the first and the second end portion. The conductor element comprises a connector socket arranged at the first end portion, for mating with a cable plug. The connector socket is integrally formed with the middle portion.

Cable connection device

A conductor assembly for a power network includes an inner conductor defining radial and axial directions, an insulating layer arranged around at least an axial section of the inner conductor, and a sensing electrode arranged radially outward of the insulating layer. The sensing electrode is operable as a first electrode of a sensing capacitor of a capacitive voltage sensor, in which sensing capacitor the inner conductor is operable as a second electrode. The conductor assembly further includes an electrically insulating spacer element arranged radially between the insulating layer and the sensing electrode.

Conductor assembly

A conductor assembly for a power network includes an inner conductor, an insulating layer arranged concentrically around the inner conductor, and a sensing electrode, arranged radially outward of the insulating layer, and operable as a first electrode of a sensing capacitor of a voltage sensor. The conductor assembly further includes a voltage pickup element having electrically conductive major surfaces, the first major surface being in a surface contact with the sensing electrode. The conductor assembly further includes an electrode wire, in electrical and mechanical contact with the voltage pickup element, for electrically connecting the voltage pickup element with an electric or electronic component disposed remote from the sensing electrode.

The present invention provides a non-return valve for a resin injection system, especially for use in electrical cable joints, comprising: a valve housing which includes an outlet for a fluid flowing through the valve; and a valve body which is held by the valve housing and is freely movable between a closed position, in which the outlet is substantially sealed or closed to fluid flow by the valve body, and an open position, in which the outlet is substantially open to fluid flow. Thus, with the present invention, the valve body can be loosely held by the valve housing and the valve need not include any spring means to bias the valve body to the closed position. The invention also provides a resin injection system for sealing a localized breach in an object, such as an electrical cable joint.

Non-return valve for a resin injection system and resin injection system incorporating same

Sleeve () for a high- or medium-voltage power cable () having an inner conductor (). The sleeve comprises (i) a tubular sleeve body () having an electrically conductive or semiconductive first axial electrode section (), and (ii) a circuit board (). The sleeve is radially expandable or shrinkable. It can be arranged radially outward of the inner conductor, such hat the first axial electrode section is radially separated from the inner conductor by at least an electrically insulating spacer layer (). The circuit board is at least partially arranged radially outward of the sleeve body and comprises an electrical contact () which is electrically connected with the first axial electrode section.

Sleeve for a power cable

The tubular terminal for a cable, in particular a medium or high voltage cable, comprises a first connector having at least one terminal end for connecting to at least one mating second connector adapted to be connected to a cable and engaged with the first connector for making electrical contact therewith upon connection of the second connector to the at least one terminal end of the first connector. Furthermore, the tubular terminal comprises a shrinkable sleeve having a first tubular portion and a second tubular portion extending from the first tubular portion. The first tubular portion of the shrinkable sleeve is fixedly arranged around the first connector. The second tubular portion of the shrinkable sleeve is adapted to extend beyond the at least one terminal end of the first connector for covering a mating second connector and cable attached thereto when the second connector is connected to the at least one terminal end of the first connector.

Tubular terminal for a cable

Growing community of inventors

Cologne, Germany

Bernd Schubert