Abstract:
The invention relates to a system (11), which can provide reactive power in an alternating current network (10), the system comprising: a two-pole (12) having a first two-pole terminal (121) and a second two-pole terminal (122) having a reactance other than zero; a transformer (13) having an adjustable transmission ratio, comprising a primary side (17) having a first primary terminal (171) and a second primary terminal (172), and a secondary side (18) having a first secondary terminal (181) and a second secondary terminal (182); a switching device (14) for adjusting the transmission ratio of the transformer (13), wherein the first primary terminal (171) can be connected to a network line (101) of the alternating current network, the first secondary terminal (181) is connected to the first two-pole terminal (121), and the second secondary terminal (182) is connected to the second two-pole terminal (122).
Abstract:
An electrical energy transformation assembly (1 ) supplied by a power source (A) for appropriately supplying power to a load (L) that comprises a primary winding (2) connected to the power source (A) and electromagnetically coupled to a secondary winding (3) connected to the load (L). The transformation assembly (1) involves the primary winding (2) comprising two portions (21, 22), wherein a principal portion (21 ) extends between a first point (PO) and a second point (P1 ), and the second portion (22) extends from a second point (P1 ) to a third point (P2), and it is dimensioned so that the value of the voltage (V P0-P2 ) established between the first point (PO) and the third point (P2) of the primary winding (2) is in the range defined by the voltage (V kvp ), applied to the principal portion (21 ) multiplied by the coefficients 1.2043 - 2% and 1.2043 + 2%; the value of the voltage (V S0-S1 ) between the first end (SO) and the second end (S1 ) of the secondary winding (3) is in the range defined by the voltage (V kvp ), multiplied by the coefficient 0.1021 - 5% and 0.1021 + 5%; the value of the current (I PO-P1 ) flowing through the principal portion (21 ) is in the range defined by the current (l kas ) flowing through the secondary winding multiplied by the coefficients 0.1 133 - 5% and 0.1 133 + 5%; the value of the current (I P1-P2 ) flowing in the second portion (22) is in the range defined by the current (l kas ) multiplied by the coefficients 0.0940 - 5% and 0.0940 + 5%; the value of the magnetic induction relating to the configuration defined by the first point (P0) and the third point (P2) of the first winding (2) and of the second winding (3) is in the range defined by the coefficient of magnetic induction (C kim ) for the configuration defined by the principal portion (21 ) and by the secondary winding (3) multiplied by the coefficients 0.9965 - 0.03% and 0.9965 + 0.03%.
Abstract:
The present invention relates to a dry distribution transformer comprising a housing (1'), a coil (200), a sealed compartment (100) and a taps panel (1 10) associated to the coil (200). The taps panel (110) has an electrostatic shield (107) and is positioned inside the sealed compartment (100), the sealed compartment (100) being filled with a solid dielectric material and protected by a cover (120). One also describes an electric insulation method for a taps panel of a dry distribution transformer and taps panel for a dry distribution transformer filled with removable insulating resin. The coil (200) has a grounded (115) electrostatic shield (107).
Abstract:
Die Erfindung betrifft einen Laststufenschalter für Stufentransformatoren, der für jede der beiden zu schaltenden Wicklungsanzapfungen jeweils einen Haupt- und einen Hilfsstromzweig aufweist. Das Schalten in jedem Haupt- als auch Hilfsstromzweig erfolgt durch eine Vakuumschaltröhre. Erfindungsgemäß ist in jedem der Hauptstromzweige und in jedem der Hilfsstromzweige zwischen der jeweiligen Wicklungsanzapfung, mit der sie elektrisch verbunden sind, und der jeweiligen Vakuumschaltröhre in diesem Zweig ein weiterer mechanischer Kontakt vorgesehen. Die Schaltung dieser mechanischen Kontakte erfolgt derart, dass jeweils die Vakuumschaltröhren im Haupt- und Hilfsstromzweig der nicht beschalteten Wicklungsanzapfung galvanisch von dieser trennbar sind.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur quantitaven Analyse von Gasen als Monitoring für Laststufenschalter. Die allgemeine erfinderische Idee besteht darin, bestimmte charakteristische Gase, die eine indirekte nachfolgende Zuordnung und ein Maß für Alterungserscheinungen, übermäßige Entladung und/oder Erwärmung am Stufenschalter ermöglichen, auszuwählen, diese charakteristischen Gase, die sich während des Betriebes des Stufenschalters in dessen Isolieröl bilden, in bestimmten Zeitabständen zu messen, aus den gemessenen Werten der definierten Gase aussagekräftige Quotienten zu bilden, die direkte Rückschlüsse auf Alterungserscheinungen, übermäßige Entladung und/oder Erwärmung zulassen, aus einem Abgleich des aktuellen ermittelten Wertes des jeweiligen Quotienten mit dem zuletzt ermittelten Wert des selben Quotienten Tendenzen aufzuzeigen und daraus Warnungen für Alterungserscheinungen, übermäßige Entladung und/oder Erwärmung abzuleiten, wenn sich die entsprechenden Quotienten im Lauf der Zeit oder im Verlauf der absolvierten Schaltungen tendenziell signifikant verändern.
Abstract:
A coil, in particular for electromagnetically controlled brakes or clutches, has two or more part-windings and associated taps. A first part-winding comprises a winding wire having a first diameter, and a second part-winding comprises a winding wire having a different diameter.
Abstract:
The present invention relates to a motor drive cabinet (2) in an on-load tap-changer, comprising an electric motor drive unit and a control unit (12). The electric motor drive unit comprises an electric motor (6), a gearbox (7) and a position transmitter (9), wherein said control unit (12) is arranged to control an outgoing axis (3) outgoing from said motor drive cabinet (2) by feeding said electric motor (6) through direct connection to drive said outgoing axis (3) through said gearbox (7), and wherein said position transmitter (9) is arranged to detect movement and position of said outgoing axis (3) and to provide indications thereof to said control unit (12), and wherein said motor drive cabinet (2) is sealed during use with said electric motor drive unit and control unit (12) within that sealing.
Abstract:
Spule, insbesondere für eine elektromagnetisch betätigbare Bremse oder Kupplung, wobei die Spule zwei oder mehr Teilwicklungen und zugehörige Abgriffe umfasst, wobei eine erste Teilwicklung einen Wicklungsdraht mit erstem Drahtdurchmesser und eine zweite Teilwicklung einen Wicklungsdraht mit einem anderen Drahtdurchmesser umfasst.
Abstract:
A system for electrically contacting a semiconductor wafer (22 in Fig. 1) during implanting of the wafer includes one or more pairs of closely spaced contacts located adjacent the wafer (12a and 12b in Fig 1) and a driving circuit connected to the contacts to provide a discharge from one contact to the wafer and from the wafer to the other contacts The contacts can be spaced apart from the wafer in the establishment of corona at lower drive voltages. Alternately, the contacts may be rounded (50,52 in Fig 4) and may contact the wafer. The driving circuit may be adapted from a pulsed dischaige circuit, such as a Kettering ignition circuit, a capacitance discharge ignition circuit, a blocking oscillator circuit, or a Tesla coil circuit.
Abstract:
A voltage regulator (100) apparatus comprises a transformer having a primary winding (102) and a secondary winding (104), a plurality of further windings selectively connected to one of the primary winding and a secondary winding, and a plurality of solid state selectors respectively coupled to each of the plurality of further windings to one of: (i) connect the further winding in series with the primary winding of the secondary winding and (ii) bypass the further winding.