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.
Abstract:
An electric switching device for switching over a current path from a first electric conductor (7) to a second electric conductor (8), comprising a first contact member (1) and a set of second contact members (2, 3, 4, 5), which are arranged after each other along a path. The first contact member (1) is movably arranged in relation to the second contact members along said path for the achievement of an electric connection with each of these. The set of second contact members comprises two main contact members (2, 5), each of which being connected to one of said conductors (7, 8), and at least one switching contact member (3, 4) arranged between the main contact members. The first contact member (1) is arranged to allow the simultaneous contacting of two adjacent second contact members. The switching device further comprising an arrangement (10) connected to said switching contact member (3, 4) and said two conductors (7, 8) for connecting and disconnecting said switching contact member (3, 4) to and from, respectively, said two conductors (7, 8).
Abstract:
The invention relates to a tap selector for an on-load tap changer, wherein the two tap selector shafts (3, 4) are made of metallic material and placed inside the current collector rings (22). The movable contacts (6, 7) of the selector are supported by the shafts (3, 4) via contact holders (8) of insulating material. Between each current collector ring (22) and the shafts (3, 4) an insulating ring (21) is arranged. The fixed contacts (11) of the selector are supported by an electrically insulating, circular hollow cylinder (9) with a closed circumference, the contacts (11) being fixed to the cylinder wall by axial upsetting. The cylinder (9) is provided with holes (10) for inspection and mounting. Each current collector ring (22) is connected by a screw joint to a current collector arm (24), which projects through a hole in the cylinder wall (9). Axial adjustment of the current collector arm (24) can be achieved by making the contact surfaces (25, 26) between the arm (24) and the ring (22) in the screw joint cylindrical.
Abstract:
A transformer system includes conductive windings extending around a magnetic core and impedance-varying windings extending around the magnetic core. The impedance-varying windings include positive windings and negative windings. The conductive windings and the impedance-varying windings conduct electric current around the magnetic core. The system includes a first impedance tap changer that is electrically coupled with the positive windings of the impedance-varying windings and a second impedance tap changer electrically coupled with the negative windings of the impedance-varying windings. A controller controls the first impedance tap changer and the second impedance tap changer to change an impedance of the system by changing which portion of the positive windings and which portion of the negative windings are conductively coupled with the conductive windings, and which portion of the positive windings and which portion of the negative windings are disconnected from the conductive windings.
Abstract:
In some embodiments, a transmit coil configuration is provided. A coil configuration for a wireless transmitter according to some embodiments can include a plurality of turns coupled between a first tap coupled to an innermost turn and a second tap coupled to an outermost turn; and at least one adjustment tap coupled to at least one turn of the transmitter coil between the innermost turn and the outermost turn. The transmission coil can include an MST coil coupled to the second tap of the transmission coil. In some embodiments, the MST coil can include a plurality of turns arranged in one of a circle, an oval, an egg shape, or a square shape.
Abstract:
Um eine Anordnung (1) zum Anschluss an ein Hochspannungsnetz mit mehreren einphasigen Transformatoren (2, 3, 4), die jeweils einen mit einem Fluid befüllten Transformatortank (5) aufweisen, in dem ein Kern (21) mit wenigstens einer Wicklung (19, 20) angeordnet ist, wobei die Wicklungen (19, 20) der einphasigen Transformatoren (2, 3, 4) zumindest teilweise unter Ausbildung eines Sternpunktes (9) miteinander verbunden sind, zu schaffen, deren Kurzschlussspannungsverlauf oder Impedanz an unterschiedliche Anforderungen angepasst werden kann, wird vorgeschlagen, dass die Wicklungen (19, 20) jeweils über eine Umschalteinheit (12) und eine Drosselwicklung (14) mit dem Sternpunkt (9) verbunden sind, wobei die Drosselwicklung (14) mehrere Anzapfungen aufweist und die Umstelleinheit (12) zur Auswahl der Anzapfung eingerichtet ist, über die die jeweilige Wicklung (19, 20) mit dem Sternpunkt (9) verbunden ist.
Abstract:
A fluid treatment apparatus is constructed from at least one electrochemical cell including a bipolar ion exchange membrane and having a single output orifice to deliver treated fluid. The apparatus may employ a power supply transformer featuring a magnetic dispersion bridge to regulate the magnetic flux to secondary coils, thereby limiting the current delivered to the load and protecting the apparatus from over-current damage. The cell includes a membrane assembly which incorporates both the inner and outer electrodes to provide repeatable assembly and service, as well as reliable performance. The apparatus will provide continuous fluid treatment when designed with at least two stages, each stage including at least one cell, in which one stage is treating influent solution and another stage is regenerating. A method to operate these apparatus includes the steps of deionizing influent solution without interruption, halting deionization water flow and removing power from the deionization cells, flushing the liquid between membrane layers to the drain outlet, initiating regeneration power, and initiating regeneration flow.