Abstract: A device and a method for its use to attenuate electromagnetic noise, such as that caused in power supply line current by back-emf from devices being powered, in order to provide cleaner, or more regular alternating current and voltage waveforms. A permanently magnetized magnet is held close to a conductor cable for an alternating current, in a case, which may also hold a permeable material extending from the magnet and at least partly surrounding the cable. Multiple magnets may be included, arranged parallel with each other and with like poles adjacent or facing each other, forming a tubular arrangement about the cable.

Abstract: A circuit breaker assembly having an electronic trip unit used to detect an overcurrent condition in a protected electrical circuit. The electronic trip unit being electrically connected to a current transformer used to sense electrical current and provide operating power to the electronic trip unit. The current transformer comprising a metal core having a top surface and a bottom surface where the difference between the top and bottom surfaces defines a height of the core. The core having a concentrical opening extending through the height so that the distance between an outside point on the concentrical opening and the closest outside point of the core defines a thickness of the core at that point. Passing through the core opening is a primary winding and encircling the thickness of the core is a secondary winding. To optimize usage of the current transformer, a partial air gap is added to the metal core so that the range of operation is maximized while at the same time minimizing the remanence attenuation.

Abstract: An inductive sensor for measuring a current in a conductor includes a generally annular winding (10) delimiting a passage for the conductor. The winding extends homogeneously over most of the circumference of a ring except for a section (20) where the winding has a structural discontinuity. The sensor includes at least one identical complementary winding (12). The windings (10, 12) are disposed coaxially and oriented so that the structural discontinuities of the windings are regularly distributed in the angular direction about the common axis of the windings. The windings are connected in series.

Abstract: In a superconducting coil system an m×n array of wound cores are arranged and n pairs of strands, totalling at 2n strands, are passed in pairs through the hollow center of the cores so that the current will flow in mutually opposite directions in each paired strands. The system can reduce AC loss, completely avoiding current imbalance in strands and being designed easily.

Abstract: A slotted coaxial shield for high voltage cylindrical air core transformers is described that controls the electric field stress while permitting the rapid extraction of electric energy stored in the shield to improve the output efficiency.

Abstract: A current transformer for a ground fault circuit breaker used on a circuit having at least one line conductor and a neutral conductor includes a toroidal core having a circular opening defining a center point and a multi-turn winding wound on the core. A first guide member is disposed on one side of the core, and a second guide member is disposed on another side of the core. The first and second guide members each have a hole for receiving the line conductor and a hole for receiving the neutral conductor formed therein. The guide members thus position the conductors with respect to the core. Also included is a method of correcting asymmetries in the current transformer. The method includes measuring the magnitude and orientation of any asymmetries, and then altering the current transformer based on the measured magnitude and orientation of the asymmetries so as to eliminate the asymmetries.

Abstract: A device for absorbing the electric noise on a cable contains a casing formed from two halves, in each of whose halves can be fixed a ferrite element. The two ferrite elements enclose the cable with the casing closed. A locking device keeps the two casing halves interconnected. The locking device is entirely housed within the casing walls, so that the casing cannot be unintentionally opened.

Abstract: The invention relates to inductors or flyback transformers provided with a device that opposes the saturating flux in a core.

Abstract: An inductance device according to the present invention, which is for use in power supply units, is constructed in such a manner that a slit 3 is provided in one side of a polygonal cylindrical ferrite core 1 in the same direction to a hollow portion 2 to form an open magnetic path, and a belt-like conductor 4 is inserted through the hollow portion 2, so as to minimize the dimensions, have an inductance value not more than 1 &mgr;H, and hold DC overlapping characteristic flat even if high current flows.

Abstract: A holder for containing a split ferrite suppressor includes two halves hinged to each other along one side, each half including a recess adapted to hold one portion of a split ferrite suppressor. Each half of the holder also includes two ends, each end containing a generally semicircular notch adapted to receive a cable to which the suppressor is to be applied, and locking tabs disposed on both sides of the semicircular notch for locking the two halves of the holder together. The locking tabs are preferably arranged as confronting mating pairs of male and female elements, each element having a head portion and a neck portion smaller than the head portion. The interlocking tabs preferably include tapering surfaces connecting the head and neck portions, the tapering surfaces applying a biasing force tending to hold the two halves of the holder together. The tapering surfaces are preferably substantially planar surfaces inclined at about 10° with respect to a line bifurcating said head and neck portions.

Abstract: The invention relates to a current transformer for three-phase systems and it used to detect currents, for example with three-phase current meters or electronic devices which trigger low voltage protection breakers. The invention aims at developing a current transformer that can be produced and fixed in a simple and low cost fashion and permitting to measure total current. Therefore, four mutually spaced apart, parallel, identical cylindrical conversion coils (4-7) are provided. In each case, a three-phase current lead (1, 2, 3) runs between two conversion coils (4-5, 5-6, 6-7) arranged adjacent and substantially normal to their longitudinal axes (10). Conversion coils (4-7) are held headwise through two low coercivity yokes (8, 9) extending in their longitudinal axes plane.

Abstract: A method of manufacturing a bead inductor prevents deformation of a metal coil or dislocation of the axis position of the metal coil caused by injection pressure at the time of injecting a molten resin material from a gate. A coil is fitted onto a coil supporting pin provided on a first lower mold used for injection molding in a cavity of the mold such that the inner periphery of the coil is in close contact with the coil supporting pin. A molten, resin material is injected into the cavity. Then, the coil supporting pin and the first lower mold are removed from the molded product, and a second lower mold without a coil supporting pin is provided for replacing the first lower mold. A molten resin material is injected into the space which had been occupied by the coil supporting pin. After removing the hardened resin molded product from the mold for injection molding, the end parts of the coil are cut so as to be exposed.

Abstract: A nonreciprocal circuit device is provided which has an improved reflection characteristic of the port of the center conductor which is disposed parallel with one side of a magnetic body. In this nonreciprocal circuit device, a magnetic assembly is formed by disposing three center conductors on a magnetic body having a rectangular parallelepiped planar shape. The conductor width of one center conductor which is disposed parallel with one side of the magnetic body is made wider than that of each of the two other center conductors.

Abstract: An electric noise absorber for preventing looseness of magnetic body parts in a closed housing, without increasing the number of parts or decreasing the strength of the housing. The housing comprises a pair of case halves which house ferrite core halves, respectively, and are hinged to each other. The bottom wall of each case half is formed with a curved shape convex toward the space housing the ferrite core half. When the case halves are closed with the ferrite cores therein, the ferrite cores press each other toward respective bottom walls and resiliently deform the walls. The resilience of the deformed bottom walls urges abutting surfaces of the ferrite cores into close contact.

Abstract: An inductive component for the attenuation of common mode and push-pull interferences in n-lead systems with n≧2 leads, includes a body of a permeable material having n bores formed therein. Electric leads are disposed in the bores.

Abstract: A ferrite-core housing case 20 has a first split case half 21, and a second split case half 22 that is openable with respect to the first split case half 22, and houses a ferrite core 1 for a flat cable. A pair of spring portions 27 which press the ferrite core 1 are formed in at least one of the first and second split case halves 21 and 22, and a fulcrum of each of the spring portions 27 is located on a side face 22b of the split case half while an acting point is located on a center side.

Abstract: A device for absorbing electrical noise in a cable contains two ferrite cores, each of which is housed in a casing half-shell. The two casing half-shells are placed with the ferrite cores around a cable such that a cylindrical passage is formed. The casing half-shells include semicylindrical webs, which fit into grooves in the ferrite cores. The casing half-shells have a tongue on one of the half-shells and a ratchet member on another of the half-shells to provide an adjustable closure to accommodate variance in the dimensions of the ferrite cores.

Abstract: An electric noise absorber for clamping to a cord of an electronic device comprises a holding case composed of two box-shaped case members. Each case member contains a magnet having a hemi-cylindrical groove at the upper part of the magnet for receiving the cord. It is possible to easily and securely attach and detach the electric noise absorbing magnet to the cord by simply closing and opening the case members.

Abstract: A noise suppressing apparatus includes a magnetic body including a ferrite, a coiled conductor extending through the magnetic body, a pair of external electrodes provided on the surface of the magnetic body so that an electric current flows through the coiled conductor therebetween and a ground electrode covering at least a main portion of the magnetic body between the external electrodes on the surface of the magnetic body.

Abstract: A method of manufacturing a bead inductor includes the steps of forming a molded body of a resin material or a rubber material including a powdery magnetic substance with a conductor coil defined by a wound, coated metallic wire; cutting both ends of the molded body so as to expose the ends of the conductor coil; and attaching external terminals to the exposed ends of the conductor coil so that the external terminals are electrically connected to the conductor coil. The connection reliability between the conductor coil and the external terminals is greatly increased in the bead inductor manufactured by the method because convex portions protruding from the end surfaces of the molded body are provided on both ends of the conductor coil, which are exposed by cutting the molded body, so that the external terminals are attached and electrically connected to the convex portions.

Abstract: This invention relates to the planarization of inductive components by reducing standard coiled designs to single turn designs from which the required parameters are obtained by scaling the length. Single turn designs having magnetic material encircling the conductors along their full length enable the thinnest form. The single turn form also enables the inductive component to be routed according to any shape in the plane or on any conformal surface. The single turn inductors do not need to coil hence there is no overlap necessary in the plane. The planar form allows integration of inductive components with integrated circuits. These inductive components can be embedded in other materials. They can also be fabricated directly onto parts. The differential current transformer by virtue of its fabrication next to a capacitive pick-off enables the preservation of the purity of the signal obtained by taking signal differences close to the transducer and minimizing pick-up from leads.

Abstract: A current transformer includes transformer units combined into a bundle, each of the transformer units including an annular iron core surrounding a bus conductor and a secondary winding wound around the iron core for measuring an electric current flowing through the bus conductor, and a shield winding wound around the bundle of the transformer units. The secondary winding may be provided with an air gap in which no secondary winding is present, located at a portion of the current transformer in a direction of a resultant vector, perpendicular to a line connecting bus conductors neighboring the bus conductor to be measured and passing through the bus conductor to be measured. A second air gap may be provided at the position opposite the air gap of the transformer, relative to the bus conductor to be measured, and the shield winding may be divided into two parts at the air gap and opposite the air gap relative to the bus conductor to be measured.

Abstract: A current transformer assembly comprises a toroidal core and a conductor having a body portion and a mounting portion. The conductor's body portion extends through the aperture of the toroidal core. The mounting portion is positioned for a mechanical and electrical connection between an external conductor and the current transformer. A connection is made between the body portion and the mounting portion wherein mechanical engagement is sufficient to prevent unintended separation of the body portion from the mounting portion and electrical coupling is sufficient to permit the flow of current between the body portion and the mounting portion.

Abstract: A soft magnetic core is substantially cylindrical and a linear-shaped coil conductor is inserted through a hole in the central portion of the soft magnetic core. A hard magnetic material sheet has areas which are magnetized in a thickness direction thereof and the areas are arranged in strips so that a magnetization direction of adjacent strips is mutually opposite. The hard magnetic material is wound on the outside surface of the soft magnetic core and is fixed to the soft magnetic core. The direction of the areas formed as strips of the hard magnetic material is substantially perpendicular to the axial direction of the coil conductor.

Abstract: An electric noise absorber comprising at least two ferrite pieces having abutting planes, at least two case members containing the ferrite pieces respectively and being closed by means of engagement members, and a spring member provided in at least one of the case members for pressing the ferrite pieces against each other when the case members are closed. Since the case members for keeping the ferrite pieces in appropriate positions and the spring member for pushing up the ferrite pieces for close contact are separately molded, the case members are bestowed with strength and the spring member with elasticity, both suitable for their own purposes. The case members requires no apertures for biasing members and therefore outside magnetic substance is prevented from contacting with the ferrite pieces contained in the case members.

Abstract: The present invention is directed to an inductor element for noise suppression capable of suppressing the high frequency component in the GHz band through absorption.A core for passing through a signal line conductor is provided. The core is at least partially constituted with a compound member that is prepared by mixing ferromagnetic metal particles and resin. The compound member imparts a frequency-dependant absorption loss to a signal running through the signal line conductor. The absorption loss starts essentially in the GHz band and the high level of absorption remains in effect up to at least 20 GHz.

Abstract: A transformer for switched mode power supplies and the like comprises an input stage transformer section which is designed for very good coupling and very low primary leakage inductance, without regard for insulation above "working insulation" or for interwinding capacitance. One or more additional stage transformer sections are optimized for very low interwinding capacitance and very high dielectric isolation. The secondary of the input stage drives the primary of the next stage, so that the transformer stages are in series. Accordingly, the total interwinding capacitance from end to end is very low and the total dielectric isolation from end to end is very high. The secondary of the input stage transformer is isolated from both the input and the output, so it can be grounded as a safety ground.

Abstract: A magnetic flux concentrator shield is disclosed for use with magnetic flux sensors in an overload relay for multiple pole electromagnetic contactor applications. The magnetic flux concentrating shield has slotted layers of laminated members. The layers have a series of pole shielding slots which concentrate magnetic flux generated by conductors carrying current through conductor apertures in each layer. Magnetic flux sensors are positioned within air gaps within each pole of the shield. By shielding the generated magnetic flux from reaching the magnetic flux sensor of another pole, the pole shielding slots minimize cross pole magnetic flux sensor interference.

Abstract: A method for forming an enclosure on an outer face of a ferrous core comprises the steps of 1) mounting a ferrous core on a first mold; 2) disposing the first molding assembly together with the ferrous core into a second mold; 3) injecting an insulative material into the second mold to enclose the ferrous core; 4) removing the enclosed core from the second mold; and 5) ejecting the enclosed core from the first mold.

Abstract: Method for replacing a first cable (1) by a second cable (2) between a first predetermined point (1a) and a second predetermined point (1b). The cable comprising,the provision of first series impedance means (S1) close to the first end (2a) and second series impedance means (S2) close to the second end (2b) of the second cable (2), which first (S1) and second (S2) series impedance means can be switched between a state of high impedance value and a state of low impedance value,electrically connecting the second cable to the first cable (1) at the first (1a) and second (1b) points, during which operation both the first (S1) and the second (S2) series impedance means are kept in their state of high impedance value,switching the first (S1) and (S2) series impedance means to their state of low impedance value before optionally removing the first cable between the first point and the second point.

Abstract: An insulated wire with a noise-suppressing function includes a ring-shaped magnetic core, a coated wire inserted into the hole of the ring-shaped magnetic core, and a securing member for securing the ring-shaped magnetic core to the coated wire. The inner diameter of the ring-shaped magnetic core, namely the diameter of the hole, is set smaller than the outer diameter of the coated wire. The coated wire is formed of a pair of parallel conductive wires, a wire-coating member for coating the pair of conductive wires, and a sheath for covering the wire-coating member. The sheath is removed at one end of the coated wire. A part of the conductive wires which is coated only with the wire-coating member is inserted into the hole of the ring-shaped magnetic core.

Abstract: A multimeter having an elongated housing with a fixed recess for receiving a current-carrying conductor is provided. The multimeter is adapted to measure various parameters including a.c. and d.c. voltage, resistance, and a.c. current. On one end of the elongated housing of the multimeter is a C-shaped current sensor mounted around the fixed recess for measuring a.c. current in the current-carrying conductor and on the other end is a pair of test leads for measuring resistance, a.c. voltage, and d.c. voltage. The current sensor and the test leads provide input signals to an analog-to-digital converter (ADC) to obtain digital samples which are displayed as measurement results according to the selected measurement mode.

Abstract: A self-powered axial current sensor for generating a signal which accurately represents current in a power line includes, in one embodiment, a housing having a bus bar opening of substantially rectangular shape extending longitudinally therethrough. The housing also includes current sensor core retaining walls which define a current sensor region, and a cover base wall which defines, with one of the retaining walls, a power core region. A current sensor core and coil are located in the current sensor region and are positioned proximate the bus bar opening. The current sensor core and coil also are substantially symmetrical with respect to the center axis of the bus bar opening. The current sensor further includes a power core and a power coil located in the power core region and positioned substantially symmetrically with respect to the center axis of bus bar opening.

Abstract: A snubber for electric circuits comprises a plurality of small lossy magnetic cores with a wire through each, wired in parallel. Such an arrangement will have a much faster saturation time than a single core of comparable volume, and the power dissipated will be distributed and have more surface area. With conventional lossy snubbers, the only choices are the size of the core and the material. With this snubber, the number of cores to use, and the size of the individual cores are additional variables available to the designer to optimize the snubber. A variation of the snubber uses a plate of lossy magnetic material with a plurality of through holes. This is comparable to using individual cores, but the one piece may be easier to handle and assemble.

Abstract: The present invention relates to a gas-insulated current transformer of simple structure for a single-phase or multi-phase switchgear, which transformer can be made in various dimensions and with magnetic cores of various lengths. The transformer comprises at least one support tube carrying three annular cores carrying respective secondary windings. The windings are superposed and disposed coaxially about the tube, and they are held by a clamping strap. The tube and the windings are disposed inside an enclosure defined by two metal plates constituting a bottom closure end plate and a top closure end plate, and by four metal side walls. The end plates are interconnected by link rods disposed in their corners. The two end plates are fixed to the ends of the rods by screws, and the metal side plates are screwed to said rods.

Abstract: An apparatus for reducing electromagnetic interference associated with a signal-conducting cable includes a ferrite bead and a one-piece molded encasement covering the ferrite bead. The encasement includes a number of ribs located within a longitudinal aperture of the ferrite bead. The ribs protrude radially inward to secure the apparatus to the cable and to coaxially align the cable within the aperture. In a preferred embodiment, the encasement and ribs are integrally formed from a resilient material.

Abstract: A noise absorbing apparatus includes a pair of ferrite members and a pair of covers. The ferrite members are located to oppose each other in tight contact with each other to clamp a cable therebetween. The covers cover the ferrite members. The covers form opening portions through which the cable is inserted. The covers are integrally formed with cable clamping pieces partly projecting in a radially inward direction of the opening portions. Each of the cable clamping pieces has a direction of thickness which is aligned with the radial direction of the cable. The cable is clamped with an elastic deformation force of the cable clamping pieces in the direction of thickness.

Abstract: The measuring device is intended for a metal-enclosed, gas-insulated high-voltage installation. It contains at least one Rogovski coil (10), which is arranged in an enclosure tube (3), filled with insulating gas, of the metal enclosure and serves to detect the current in a current-carrying conductor (9), led through the enclosed tube (3), and a measuring electrode (11), which surrounds the conductor (9) and serves to detect the voltage of the conductor (9). The current conductor (9) is rigidly connected to a current-conducting cast armature (13) of an insulator (14) fastened to the enclosure tube (3). In the measuring device according to the invention, a defined field geometry is maintained in the interior of the enclosure tube (3) even over long periods and under changing loads. Consequently, the sensors, in particular the voltage sensor containing the measuring electrode (11), can transmit output signals of high measuring accuracy.

Abstract: An electric noise suppressor is provided for suppressing high-frequency electric noise which comprises a thermoplastic housing and two ferrite members disposed therein. The thermoplastic housing is formed from two hingedly connected case halves, which are substantially identical. A ferrite member is secured to each case half by a laminated compressible adhesive-foam element, which is comprised of a resilient foam core layer and opposing adhesive layers disposed thereabout. Due to the resiliency of the foam core layer, the ferrite members are pressed into tight engagement within the thermoplastic housing. The end walls of the thermoplastic housing are formed with circular apertures, which are each formed with a diameter which is slightly smaller than the diameter of the cable which is engaged by the electric noise suppressor. The dimensional differences between the cable and the apertures allows the end walls to grippingly engage the cable at a predetermined location.

Abstract: Common mode ferrite bead is provided for suppressing EMI/RFI. The bead includes a ferrite body of substantially rectangular configuration with top and bottom surfaces, first and second end surfaces and first and second side surfaces. Six apertures pass entirely through the body from the first end surface to the second end surface. Grooves may be provided in bottom surface. Two conductors are provided through the body such that each of the conductors passes through each of three of the apertures through the body. The opposed ends of the conductors are bent to fit in the grooves in the bottom surface of the body. These ends of the respective conductors define contact which can be soldered to conductive pads on a circuit board.

Abstract: A current transformer assembly has an annular transformer encompassing a busbar where it projects through the wall of equipment. The assembly has an electrically-insulative housing bolted to the equipment wall. The housing has a rear wall with an aperture through which the busbar extends, the transformer being located in a recess between the rear wall of the housing and the front of the equipment wall. The housing is open on its front and has a removable cover plate. The busbar is bolted to the upper surface of a plinth in the housing, which also supports the end of a cable entering through the front wall and bolted to the busbar.

Abstract: A current transformer assembly has three pairs of contacts projecting from the upper and lower surface of a mounting plate. Below the plate, the contacts in each pair are interconnected by a conductor embraced by a toroidal current transformer. The transformers are electrically connected to a connector accessible on the upper surface of the plate. Four mounting bolts project from the upper surface of the plate so that the assembly can be connected to cooperating contacts on an equipment panel. The lower surface of the plate is enclosed by a housing.

Abstract: Proposed is a reduction of variance in electromagnetic noise eliminating effect with signal conductors arranged in a flat cable to which an electromagnetic noise absorber is attached. The electromagnetic noise absorber is provided with a plate magnetic body and a U-shaped magnetic body. Since the width of the plate magnetic body is smaller than the interval between the side walls of the U-shaped magnetic body, the plate magnetic body can be accommodated in the U-shaped magnetic body, with a clearance formed between the end portions of the plate magnetic body and the side walls of the U-shaped magnetic body. The impedance in the vicinity of the clearance is decreased, and the difference in impedance between the end portions and the middle portion of the electromagnetic noise absorber is decreased. Therefore, a variance in the electromagnetic noise eliminating effect with signal conductors of the flat cable is made small.

Abstract: To realize compactness of an inductance element such as choke coil or the like, an inductance element is provided which is composed of a magnetic core having a central hollow portion defined by a magnetic alloy thin strip, and a lead line disposed to pass through the hollow portion of the magnetic core. A specific magnetic permeation .mu. of said magnetic core is in the range of 100 to 10,000.

Abstract: A high frequency water cooled transformer for coupling a power source to an induction heating coil and which serves to convert the output of the power source into values appropriate for the induction heating coil, and to match the impedance of the power source with the impedance of the heating coil for maximum power transfer efficiency. The primary of the transformer is adapted to be connected to the power source and the secondary is adapted to be connected to the induction heating coil. The transformer includes a secondary formed of two parallel self-supporting elongated open-ended hollow electrically conductive cylindrical members. A pair of electrically conductive terminal blocks are respectively mounted on one of the ends of the cylinders and electrically connected to the cylinders. The primary winding is wound longitudinally through the two secondary cylinders, and the ends of the primary winding are connected to appropriate terminal pins.

Abstract: A radio frequency choke for use in a cable television transmission and distribution circuit is disclosed. The radio frequency choke comprises a core of zinc-ferrite material as provided by MMG/NEOSID, Ltd., part number 31P0250012, and a wire coil wound around the core. The coil includes a first lead, a first clockwise winding of N1 turns around the core, the first lead being connected to an input of the first winding, a second counterclockwise winding of N2 turns around the core, a third counterclockwise winding of N3 turns around the core, and a second lead connected to an output of the fourth winding. In a preferred embodiment, there are six turns in the first clockwise winding, five turns in the second clockwise winding, and five turns in the third counterclockwise winding. Moreover, in the preferred embodiment, resonance damping resistors of approximately 2 K.OMEGA. are connected between the windings of the radio frequency choke.

Abstract: A coupling device of synchronous cable for making the frequency to be mutually coincided by connecting a frequency of induced voltage generated from FBT to a set.

Abstract: A current transformer for a load switch which has an interior construction tightly engaged with a main bushing therein, allows a voltage in a cable to be detected by forming an engaging hole, communicated with a conductive socket of the main bushing, on a portion of an outer circumferential surface thereof, and which has a current transformer coating casing, made of a rubber material, for thereby diminishing a thickness of the current transformer, includes a core in a ring shape, a coil winding the core, a rubber coating member for tightly covering the core and the coil therein, and coil terminals connected to both ends of the coil. The rubber coating member includes a lower coating part for tightly covering a base unit of the main bushing, and an upper coating part for tightly covering a jaw unit of the main bushing, as well as the coil and the core.

Abstract: Planar transductor consisting of one or more rectangular ferrite cores having a rectangular passage through which a metallic section of rectangular cross section is guided, in particular for the secondary control of a power supply unit.

Abstract: An improved laminated ferromagnetic FIG. 8 power meter core is provided. The core is fabricated from a plurality of ferromagnetic plates and is formed in the general shape of a FIG. 8. The central leg of the core has a cross-sectional area that is larger than the cross-sectional area of other parts of the core. The core gap, in which a Hall-effect sensor is located, has gap faces with chamfered or rounded over edges to reduce fringing and bypassing effects. The core is formed without discontinuous corners that can result in local saturation and, in use, accommodates electrical power conductors in an over-under looping relationship through the openings of the core to provide a more homogeneous magnetic flux within the core and thus more reliable metering. The overall result is a core with a higher saturation point and thus a wider dynamic range than prior art cores.