Abstract:
An inductive power transfer system includes a number of controllable reactive components (3, 6, 12, 13, 16) that allow the resonant frequency of a primary and/or secondary resonant circuit to be controllably varied to thereby control power available to a load (10).
Abstract:
There is provided an arrangement of components for use in a power line communication system. The arrangement includes (a) an inductive coupler (100) having a core (105) with an aperture (110) through which a coaxial power cable (125) is routed, where the coaxial power cable has a center conductor (130) and an outer conductor (140); and (b) a lead (145) being routed through the aperture, where the lead connects the outer conductor to a termination.
Abstract:
The invention relates to a plug-in unit assembly comprising instrument transformers, a case assembly (1) comprising a connector assembly (10), and a plug-in unit (2) comprising at least one instrument transformer (3, 4) and configured to be connected to the case assembly (1). The instrument transformers (3, 4) of the plug-in unit (2) are coded in such a manner that the codings of the current transformers (3) and the voltage transformers (4) are different. The connector assembly (10) of the plug-in unit assembly of the invention is capable of identifying the type of the instrument transformers (3, 4) based on their coding when the plug-in unit (2) is being connected to the case assembly (1).
Abstract:
The subject of invention is a HV dry instrument transformer based on a new type of dry insulation system. High-voltage instrument transformer has a form of current transformer (1) or a voltage transformer (21). The column insulating body (1 1 ) or (29) of the instrument transformer has a form of a dry capacitor bushing wound as a block of spacer sheet (9) or (30), respectively. The current transformer (1 ) has a head insulating body (13) for electrical insulation of the secondary winding assembly (8) from the primary winding conductor (12), For the current transformer (1) the head insulating body (13) has a form of a capacitor bushing and is in contact with the insulating member (18). The voltage transformer (21) has a primary winding (24) which is in contact with the insulating member (32). The column insulating body (11) or (29) has an impregnation material having substantially the same coefficient of thermal expansion as the material of the insulating member (18) or (32), respectively.
Abstract:
Ein Hochspannungs-Messwandler weist eine Isolierung auf, die eine flexible und komprimierbare Silikon-Gel-Isolierung (13) umfasst. Eine komprimierbare Isolierung erlaubt den Einsatz vorhandener Wandlerkonstruktionen für stark variierende Temperaturbereiche, ein beim Stand der Technik erforderlicher Öl-Kompensationsbalg kann entfallen und ausserdem kann der Hochspannungs-Messwandler kostengünstig produziert werden.
Abstract:
There is provided an inductive coupler for coupling signal to a power line (800). The inductive coupler includes a magnetic core (810, 811, 812, 813) for placement about the power line (800), a coil (820) wound about a portion of the magnetic core (810, 811, 812, 813), and a semiconducting coating (905) that encapsulates the core (810, 811, 812, 813) and contacts the power line (800). The signal is coupled to the coil (820).
Abstract:
Known current transformers that work in accordance with the transformer principle have a primary winding for connecting to an electric circuit and two transformer-coupled secondary windings, one of which consists of a short-circuited winding, while the other is a measuring winding having a predetermined number of windings which are connected to an evaluation unit. In accordance with the invention, the short-circuited turn (W3) consists of a ring-shaped metallic body (10), around which are coiled the windings (20, 21) of the measuring winding (W2).
Abstract:
The current transformer system that is the present invention allows for surveillance of an electronic grid at electrical power generating stations, at individual operational substations and in electric power distribution for electric network and grid measurement, protection, and control ranging from very low currents to high current magnitudes. The reception and relay of information from the CT primary circuit is sensed and transmitted by a primary electronic circuitry, digitized, converted to a fiber optic mode, transmitted to a secondary electronic circuit, processed and converted to a digital output and transmitted to various monitoring and recording devices.
Abstract:
Die Erfindung betrifft einen Hochspannungsmesswandler (1) mit einem Gehäuse (2), welches wenigstens eine elektrische Messeinrichtung (3) und ein Isoliergas (4) räumlich umfasst, und ein Verfahren zum Messen mit dem Hochspannungsmesswandler (1). Das Isoliergas (4) ist Clean Air, über welches eine elektrische Isolation im Gehäuse (2) des Hochspannungsmesswandlers (1) erfolgt.