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5221894 |
Weld current sensor
A weld current switch includes a channel-shaped core, a shunt, and a magnetic reed switch. The magnetic reed switch and shunt are placed across the core poles. An electrical conductor carrying high...
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5180970 |
Mechanically adjustable current sensor and method for making same
A current sensor is provided with a flux concentrator which is made of two or more annular laminae. The laminae, or lamina plate, each are provided with a gap formed in its circumferential length....
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5177433 |
Current-voltage transformer for electronic house-service meter
The current transformer of an electronic house-service meter has a ferromagnetic core which, except for an air gap, is closed. A measuring coil is inserted in the air gap and is fastened, and...
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5172052 |
Current sensor assembly and method
An electric current sensor assembly and method. A housing containing a Hall effect device is provided with at least one curved, concave surface for placement against a wire carrying a current. The...
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5151649 |
Pair of electrically shielded triaxial magnetic sensors for determination of electric currents in conductors in air with distance and angle compensation
Two groups of magnetic field transducers shielded from electric fields and at a known distance from each other are contained in a portable instrument. Each group consists of 3 magnetic field...
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5146156 |
Current intensity transformer device for measuring a variable electric current
In the present current intensity transformer device, a magnetic circuit having an air-gap provided with a Hall cell, is coupled with a conductor for the current to be measured and with a measuring...
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5136235 |
Rugged fiber-optical current sensor based on the Faraday effect
A fiber-optical current transformer including a sensor coil, operated in reflection mode, with a sensor fiber (5) for detecting a current utilizing of the Faraday effect. A light source (1) couples...
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5136236 |
Arrangement for voltage measurement in a GIS installation
In a gas-insulated switchgear having an isolated-phase bus, a current-carrying bus (2) with a given external radius R 1 is arranged coaxially in a cylindrical enclosure with a given external...
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5134362 |
Apparatus for detecting failure in power system
At both ends parts of a specified section of a high tension line and close to it, a first Faraday device and a second Faraday device are disposed, and an output end of the first Faraday device is...
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5134361 |
Opitcal system for linearizing non-linear electro-optic
A device for rapidly measuring voltages by electro-optic or magneto-optic ans which exhibits a substantially linear response over much of its operating range. The device employs the Pockels effect...
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5132608 |
Current measuring method and apparatus therefor
A current measuring method in which a magnetic sensor is a torodial core having a conductor for carrying a current to be measured passing through the hollow portion of the toroid. A coil on the...
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5128608 |
Optical instrument transformer
An optical instrument transformer can measure both current and voltage of the primary conductor. Measurement of current is made through modulation effect of a light signal by the optical...
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5124634 |
Ring optical current transducer
An optical current transducer for measuring current in a high voltage transmission line includes a temperature compensated light source of nominal predetermined intensity and wavelength, a Faraday...
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5124642 |
Power line post insulator with dual inductor current sensor
A power line post insulator has a housing that encloses two inductive sensors that transversely straddle a recess which receives the power conductor. Wires connect the sensors additively with...
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5105146 |
Current sensor and method for determining the current flow in conductors to be evaluated
The invention relates to a current sensor which works with a toroidal body, through which at least one conductor to be evaluated is extended and from which a measuring signal is taken. The toroidal...
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5103164 |
Optical current transformer
An optical current transformer particularly useful for a fault location system for a power supply system and substation, including a casing which can be detachably secured to a plurality of wire...
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5097202 |
Faulted current indicators with improved signal to noise ratios
In a sensor for sensing current in a conductor, a magnetic laminar arrangement adapted to surround the conductor passes through a coil. Inside the coil the laminar arrangement forms a gap with two...
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5057769 |
AC current sensor
An AC current sensor comprising a generally C-shaped main coil with a fixed gap between its ends. A pair of compensating coils are positioned at fixed locations in the main coil's gap. The...
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5053695 |
DC current monitor
A non-intrusive DC current monitor is presented which emulates the theoretical operation of an AC transformer. A conductor, carrying the current to be measured, acts as the primary of a DC current...
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5049809 |
Sensing device utilizing magneto electric transducers
A sensing device for measuring electric current and electric power including a plurality of magneto-electric transducers for detecting a magnetic field about a conductor carrying the electric...
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5041780 |
Integrable current sensors
A current conductor is provided with opposing notches to produce a restricted section and with magnetic flux sensors on opposite sides of the restricted current section. The flux sensors are...
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5034679 |
Polarization feedback control of polarization rotating sensor
A measuring system (40) for measuring a magnitude of a quantity in accordance with the invention includes a light source (52) for providing a light beam (58); a polarization controller (44),...
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5015945 |
Current sensor for measuring current in a semiconductor switch
A current sensor for measuring relatively high currents in a semiconductor power switching device includes a coil wound around a nonmagnetic toroidal core situated about the conductor through which...
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5008612 |
Current sensor
A current sensing apparatus includes a first transformer having a core which is cyclically driven into forward and reverse saturation, and a second transformer having a separate core. The sensing...
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5004974 |
Electric current sensing device
A current sensing device is disclosed for measuring a current flowing in a primary conductor. The primary conductor is coupled with a magnetic circuit, and a device for measuring the magnetic flux...
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4999571 |
Current and/or voltage detector for a distribution system
A current and voltage detector for a distribution system is provided with a lower section, an upper section and a fastener for combining the lower and upper sections into one body. The lower...
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4998060 |
Fault indicator with hot stick clamping mechanism
In the disclosed fault detector, a casing has a u-shaped portion for receiving a cable and a portion extending from the u-shaped portion. A screw is mounted on said portion. A pressure device is...
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4992656 |
Rotation, acceleration, and gravity sensors using quantum-mechanical matter-wave interferometry with neutral atoms and molecules
The invention is a neutral atom (and/or molecule) matter-wave interferometer (and/or set of interferometers) that can be used as an inertial sensor with a sensitivity exceeding that of conventional...
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4973899 |
Current sensor and method utilizing multiple layers of thin film magneto-optic material and signal processing to make the output independent of system losses
A sensor (1) for sensing the magnitude of current flowing in a conductor (12) based upon the Faraday effect. The sensor (10) includes a light source (14) for emitting a beam of light which is...
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4972140 |
Current detection device and core for detection of magnetic flux
The present invention provides a current detection device comprising a core skirt for accommodating therein a core, a core stopper for fixing the core and a magnetic-sensitive element mounted on a...
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4967145 |
Active current transformer
An active current transformer has a primary conductor in which a current is to be measured and a secondary conductor in which a measuring current is generated in use. A feedback sensor provides an...
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4963818 |
Current sensor having an element made of amorphous magnetic metal
A current sensor having an element made of amorphous magnetic metal is disclosed herein. The current sensor includes an element located near a conductor and made of amorphous magnetic metal whose...
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4956610 |
Current density measurement system by self-sustaining magnetic oscillation
A system for measuring parameters in an environment having a metallic body positioned in an electrolytic medium includes a current density sensing device positioned adjacent the metallic body in a...
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4952869 |
Dual purpose probe for simultaneous voltage and current sampling
A dual purpose probe for the simultaneous sampling of the voltage and curt at a test point. The device includes a capacitive probe for measuring voltage, and a small solenoid type inductor for...
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4949038 |
Optical fiber having a helical core for sensing a magnetic field
A sensor for sensing magnetic fields. A single mode optical fiber has a core which is wound into a helical shape. The fiber is formed with a former and a core, and the core is preferably attached...
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4947107 |
Magneto-optic current sensor
A sensor (10) for sensing the magnitude of current flowing in a conductor (12) based upon the Faraday effect is disclosed. The invention utilizes a magneto-optic material having one or more layers...
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4939449 |
Electric current sensing device of the magnetic field compensation type
An electric current sensing device for measuring a primary current of relatively high intensity. The device includes a magnetic circuit that is coupled with a primary conductor and with a measuring...
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4939448 |
Electric current sensing device of the magnetic field compensationtype
A magnetic circuit is coupled with a primary conductor in which flows the current to be sensed. The magnetic circuit has an air gap with a magnetic field detector and is coupled with a measuring...
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4937521 |
Current detecting device using ferromagnetic magnetoresistance element
A current detecting device comprises a substrate, a magnetism sensing member made of ferromagnetic magnetoresistance element, an insulating member, and a conducting member, and these members are...
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4935693 |
Line secured current and voltage sensing apparatus
A combined current and voltage measuring sensor for measuring voltage and current on a primary conductor, the sensor including a cast resin body having therein a aluminum support, the support...
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4933630 |
System for measuring phase currents in a 3-phase installation
The invention relates to a system using Rogowski coils to measure the phase currents in a three-phase installation. Each coil (1, 2, 3) is connected firstly to a corresponding operational amplifier...
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4926116 |
Wide band large dynamic range current sensor and method of current detection using same
A wide band large dynamic range current sensor operable to measure current leakage in an external conductor utilizing a magnetostatic spin wave delay line (MSW) device is described. The measurable...
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4922123 |
Supply circuit for a hall sensor multiplication circuit
Supply circuit SC for a Hall sensor multiplication circuit HSC makes it possible to produce both circuits in monolithic technology on a common substrate and yet accomplish the polarity reversal of...
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4916387 |
Optical system for a Faraday effect current sensor
A system for monitoring an alternating current including: a current transducer (10) having first and second optical ports (12,14) and a component for causing optical radiation to travel between the...
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4914381 |
Direct-coupled fluxgate current sensor
A direct-coupled fluxgate current sensor which is driven to hard saturation to achieve a sudden change in magnetic properties of the sensor, has: (a) a first closed loop core of ferromagnetic...
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4914383 |
Non-contact ammeter
A non-contact ammeter for measuring direct current in a conductor has a core capable of carrying a magnetic flux. The core surrounds the conductor so that the latter serves as a primary winding for...
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4912396 |
Circuit for the detection of an asymmetry in the magnetization current of a magnetic modulator
Circuit for detection of an asymmetry in the magnetization current, generated by a reference alternating voltage, in a magnetic modulator, in particular a magnetic modulator for zero-flux...
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4904926 |
Magnetic motion electrical generator
A magnetic motion electrical generator includes an electrical winding defining a magnetically conductive zone having bases at each end, the winding including elements for the removing of an induced...
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4901010 |
Current-measuring device
A current-measuring device in accordance with the invention comprises an annular magnetic circuit having separate first and second magnetic circuit portions (1, 2) with ends suitable for coming...
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4901008 |
Circuit arrangement for testing the correct functioning of circuit(s)
There is disclosed a circuit arrangement including a load (7) and a current source (1) for supplying current to the load via a current path with a winding (3). A core of magnetizable material (2)...
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