Abstract: A fiber optic current or magnetic field sensor uses a sensing fiber in a coil for measuring a current or a magnetic field and has a retarder for converting between linearly polarized light and elliptically polarized light. The retardation of the retarder, its temperature dependence as well as its azimuth angle in respect to the plane of the fiber coil are optimized in dependence of the birefringence in the sensing fiber in order to minimize the influence of temperature variations and manufacturing tolerances on the overall scale factor of the sensor.

Abstract: A system and method are provided in which a processor executes an application program such as an enterprise resources planning application. A primary display displays at least one user interface screen from that application program. A keyboard associated with the processor and the primary display screen is provided having a plurality of data entry keys, and at least one secondary display. The one or more secondary displays may be a part of the keyboard itself or an extension of the keyboard. The one or more secondary displays may be display screen(s) and/or input panel(s). The input panel(s) includes at least one data entry key which effects an action recognized by the processor when activated.

Abstract: A coupling system is provided. The system comprises a first hydraulic line element that is electrically conductive at least inside, a second hydraulic line element, an electrically conductive intermediate element that projects by a first end thereof at least partially into the first hydraulic line element, a releasable fastening element configured to couple the electrically conductive intermediate element to the second hydraulic line element, and a conducting device coupled to a predetermined electric potential and connected in an electrically conductive manner to the electrically conductive intermediate element. In this way, the two hydraulic lines can be coupled in a releasable manner and dissipate electric charge that may build up in, for example, a fuel system.

Abstract: A fast coupling apparatus on a media-carrying line is provided. The fast coupling apparatus includes a plug piece arranged on a first line end and a receiver piece arranged on a second line end coupled together with the plug piece, where an electrically-conductive contact sleeve is arranged on an inner periphery of the receiver piece, the electrically-conductive contact sleeve is electrically-conductively connected with the receiver piece and has a contact lip that protrudes from a surface of the contact sleeve and touches the plug piece in a connected position.

Abstract: A method is provided for tuning the fiber optic retarder of a fiber optic current sensor towards a desired temperature dependence, the sensing fiber is exposed to a magnetic field or corresponding electric current and the sensor signal as well as the signal's dependence on the retarder temperature are measured. From this initial sensor signal and its temperature dependence, a target sensor signal can be determined, at which the dependence on the retarder temperature equals a desired value. Then, the retarder is thermally treated until the sensor signal reaches the target value. The method obviates the need for repetitively measuring the temperature dependence during the tuning process.

Abstract: A fiber-optic current sensor includes a measuring unit having a light source and a light detector, and a sensing head having a sensing fiber wound around a conductor and a retarder connected to the sensing fiber. The scale factor as a function of current of the fiber-optic current sensor is described by the product of two scaling functions fe? and fs? for the measuring unit and the sensing head, respectively. The data describing the scaling functions fe?, fs? is stored in a memory of the measuring unit, while the data describing the scaling function fs? is also stored in a memory of the sensing head. Providing two such memory devices allows to store the scaling functions fe? and fs? separately, thereby turning the control unit as well as the sensor head into easily replaceable modules.

Abstract: An electro-optical high-voltage sensor includes a waveguiding sensing fiber of an electro-optical material. The electrical field of the voltage to be measured is substantially parallel to the longitudinal axis of the sensing fiber. The sensing fiber carries two orthogonally polarized light waves, with the applied field affecting the birefringence between the waves. Using an electro-optical waveguiding fiber in this configuration allows the voltage between two widely spaced points to be accurately measured.

Abstract: A coupling system is provided. The system comprises a first hydraulic line element that is electrically conductive at least inside, a second hydraulic line element, an electrically conductive intermediate element that projects by a first end thereof at least partially into the first hydraulic line element, a releasable fastening element configured to couple the electrically conductive intermediate element to the second hydraulic line element, and a conducting device coupled to a predetermined electric potential and connected in an electrically conductive manner to the electrically conductive intermediate element. In this way, the two hydraulic lines can be coupled in a releasable manner and dissipate electric charge that may build up in, for example, a fuel system.

Abstract: The disclosure relates to a coupling element between a hose and a further hydraulic line which may both be, for example, part of a fuel supply system. One system to couple said elements includes a hose-like element including an electrically conductive inside, a hydraulic line element, a connecting element coupling the hose-like element to the hydraulic line element, the hose-like element including an inverted double-walled end that houses part of the connecting element, the inverted double-walled end configured such that a portion of the electrically conductive inside is on an outside thereof, and an annular fastening element in electrical contact with the outside of the inverted double-walled end of the hose-like element. In this way, electrostatic charge may be dissipated via the electrically conductive inside and fastening element.

Abstract: The current in a generator circuit breaker is measured using the Faraday effect of an optical sensing fiber looped around the breaker's conductor. The sensing fiber is arranged in a sensing strip, which can be mounted to the enclosure of the generator circuit breaker or to the conductor. Exemplary embodiments can have a wide measuring range and can easily be fitted to new or existing generator circuit breakers.

Abstract: DC current in a high voltage AC/DC or DC/AC converter station can be measured via the Faraday effect in one or more loops of an optical sensing fiber located at the base of a bushing extending through a wall of the hall. This arrangement can exploit the base of the bushing being at ground potential, which can simplify mounting work and maintenance.

Abstract: A fiber optic current or magnetic field sensor uses a sensing fiber in a coil for measuring a current or a magnetic field and has a retarder for converting between linearly polarized light and elliptically polarized light. The retardation of the retarder; its temperature dependence as well as its azimuth angle in respect to the plane of the fiber coil are optimized in dependence of the birefringence in the sensing fiber in order to minimize the influence of temperature variations and manufacturing tolerances on the overall scale factor of the sensor.

Abstract: A method is provided for tuning the fiber optic retarder of a fiber optic current sensor towards a desired temperature dependence, the sensing fiber is exposed to a magnetic field or corresponding electric current and the sensor signal as well as the signal's dependence on the retarder temperature are measured. From this initial sensor signal and its temperature dependence, a target sensor signal can be determined, at which the dependence on the retarder temperature equals a desired value. Then, the retarder is thermally treated until the sensor signal reaches the target value. The method obviates the need for repetitively measuring the temperature dependence during the tuning process.

Abstract: The invention relates to a method for configuring a control device and to a corresponding control device. The control device comprises a main memory and a variant memory. A main data record is created in accordance with an identification from a base data record that is specific to said identification and a difference base data record that is likewise specific to said identification. The main data record is then transmitted to a main memory of the control device.

Abstract: The current in a conductor is measured by exploiting the Faraday effect in a sensing fiber. The light returning from the sensing fiber is split into at least two parts, at least one of which is analyzed by a first circular analyzer for generating a first signal. A second part may e.g. be analyzed by a second circular analyzer, and a third part may be analyzed by a linear analyzer. By combining the signals obtained in this way, the current induced phase delay in the returning light can be measured efficiently and accurately.