A reactor includes a terminal block having a plurality of terminals which is coupled to one end of a core body. A plurality of surge protection elements are connected to the plurality of terminals inside the terminal block. Input side extension portions and output side extension portions extending from coils are connected to the plurality of terminals of the terminal block, and a plurality of surge protection elements are connected to the input side extension portions and the output side extension portions, respectively.

Provided is a laminated device. The laminated device includes: a laminate body where a plurality of sheets are laminated; a plurality of noise filter parts provided in the laminate body and each having at least one coil pattern; and a plurality of external electrodes provided outside the laminate body and connected to the plurality of noise filter parts, respectively. At least one of the plurality of noise filter parts has the number of coil patterns different from that of the rest.

A portable electric appliance with an energy saving device has an inductive capacitive reactor for low amperage use, acting as a multifaceted transformer with inductor and capacitor functionalities iteratively, includes: a stacked group of hollow centered continuous loop components sequentially arranged as follows: (i) a first ferrite toroidal component; (ii) a first separator component, being a doped separator component; (iii) a non-magnetic conductive metal toroidal component having a plurality of protrusions with notches between said protrusions; (iv) a second separator component, selected from the group consisting of doped and non-doped; (v) a second ferrite toroidal component. Another inductive capacitive reactor for industrial and commercial appliances with high amperage use has similar components as just stated and also has (v) a non-magnetic conductive metal toroidal component without protrusions; (vi) a third separator component; (vii) a second non-magnetic conductive metal toroidal component having a plurality of protrusions with notches between said protrusions, (viii) a fourth separator component; and (ix) a second ferrite toroidal component.

A plurality of windings each including an electric wire portion and a first insulating coating that coats the electric wire portion. A plurality of electrostatic shields each including a conductor and a second insulating coating that coats the conductor. A stationary induction apparatus satisfies at least one positional relationship among: a relationship in which an outer peripheral end of the conductor in each of the electrostatic shields is located inside an outer peripheral end of the electric wire portion of an adjacent winding among the windings, the adjacent winding being adjacent to the electrostatic shield in the direction extending along the central axis; and a relationship in which an inner peripheral end of the conductor in each of the electrostatic shields is located outside an inner peripheral end of the electric wire portion of the adjacent winding.

A reactor includes a terminal block having a plurality of terminals which is coupled to one end of a core body. A plurality of surge protection elements are connected to the plurality of terminals inside the terminal block. Input side extension portions and output side extension portions extending from coils are connected to the plurality of terminals of the terminal block, and a plurality of surge protection elements are connected to the input side extension portions and the output side extension portions, respectively.

A surge voltage reduction member includes a tubular magnetic body having a through-hole and at least one coil wire. The coil wire is inserted through the through-hole and has a winding portion which is winded around a portion of the magnetic body. The coil wire is formed by connecting a bent coil element wire and a straight coil element wire. Where the coil wire has two or more bent coil element wires, the winding portion is formed by connecting the through-hole passing portion of one of adjacent bent coil element wires to the outside passing portion of the other of the adjacent bent coil element wires and connecting the outside passing portion of the one of the adjacent bent coil element wires to the straight coil element wire.

An arrangement for reducing a magnetic unidirectional flux component in the core of a transformer includes a measurement apparatus which provides a measurement signal corresponding to the magnetic unidirectional flux component, a compensation winding magnetically coupled to the core of the transformer, wherein magnetic flux flowing in the core induces a voltage in the compensation winding, a switch device arranged electrically in series together with the compensation winding in a current path, a control device which controls the switch device via a control parameter, where the switch unit comprises a magnetic core and a winding arrangement which is magnetically coupled to the magnetic core, and the control parameter is supplied to the winding arrangement such that the magnetic saturation state of the core is variable, whereby the conductive state of the switch unit can be produced.

A stationary induction apparatus includes a main body tank and a stationary induction apparatus main body. The main body is accommodated in the tank. An electrostatic shield ring is placed on the upper and lower end parts of a winding. An electrostatic shield ring has a magnetic ring and two insulating rings vertically fixing the magnetic ring for a spool. A conductive tape is laid on an insulating tape. These tapes are wound around the spool. An insulating tape is wound around the wound tapes. The width of the insulating tape is equal to or greater than the width of the conductive tape. One end of the conductive tape is connected to one end part of the winding and to the magnetic ring. A gap is provided at at least one place on the magnetic ring. The winding direction of the conductive tape is inverted at at least one place.

According to some embodiments, subsea fault tolerant transformer includes an arrangement of two tanks mounted one above the other. A lower tank houses the transformer windings and core and is below and abutting an upper tank. Both tanks are filled with respective dielectric oil. The electrical terminals for the primary and secondary power connections are on the second/instrument tank and the conductors pass through the instrument tank and then through the shared wall to the transformer tank. The design allows for enhanced cooling of the transformer through a single wall portion of the lower tank as well as fault tolerance associated with double barriers.

A transformer arrangement and transformer for mitigating transient voltage oscillations. The transformer included a transformer core enclosing at least one core leg. A winding is wound around one of the at least one core leg. The winding extends from a first winding terminal to a second winding terminal and includes a first winding section along a first conductor extending from the first winding terminal to a first intermediate end point, and a second winding section along a second conductor extending from a second intermediate end point to the second winding terminal. The transformer arrangement further includes an external passive electric component connected between the first intermediate end point and either the second intermediate end point or the second winding terminal arranged to decrease an effective difference between capacitive and inductive voltage distributions between the intermediate end points such that transient voltage oscillations in the winding are mitigated.