Matches 1 - 50 out of 127 1 2 3 >
Match Document Document Title
7595644 Power-over-ethernet isolation loss detector  
An AC generator has a first terminal coupled through an Isolation Loss Detect (ILD) capacitor to the positive bus of a Power-Over-Ethernet (POE) system, and has a second terminal coupled through...
7489140 Apparatus, method and system for spark testing an insulated cable  
Apparatus, methods, and systems improve spark testing of insulated cables. According to embodiments described herein, a spark tester includes a conductive housing having an entryway, an exit, and a...
7212010 Method and device for detecting a contact point on a shaft of a rotating machine  
A method and a device for detecting a touching point (i.e. contact point) on a machine having a rotating shaft, in which the touching point (i.e. contact point) on the shaft is determined during...
7212009 Fluid detection cable  
A fluid detection cable is described for use in detecting the presence of leaks in areas where a particular fluid is not desired. Sensing leads in the fluid detection cable have a center conductor...
7161355 Voltage detection device and insulation detecting apparatus for non-grounded power supply including the voltage detection device  
A voltage detection device includes a processor that has a first input port, and a second input port grounded at a first ground potential part, a first Schottky barrier diode that has a cathode...
7154279 Partial discharge detection test link, partial discharge detection system and methods for detecting partial discharge on a power cable  
A partial discharge detection test link and system is disclosed to detect partial discharge of a power cable accessory. The power cable accessory includes a first accessory component and a second...
7076374 Methods and systems for detecting and locating damage in a wire  
Methods, systems, and articles of manufacture consistent with the present invention provide for identifying and locating wire damage on a wire. Broadband impedance phase and magnitude information...
7030621 Low current AC partial discharge diagnostic system for wiring diagnostics  
A system and method for detecting partial discharges or arcing in wiring or cables is disclosed. The system employs a high-voltage AC power source to generate a high-voltage low-current AC...
7027937 Methods and systems for testing wire insulation  
Methods, systems, and articles of manufacture consistent with the present invention provide for determining the environmental resistance of a wire insulation. The broadband impedance of the wire is...
7019531 Procedure and device for the evaluation of the quality of a cable  
A procedure and a system for the evaluation of the quality and/or efficiency of a cable or a cable segment by a current measurement is disclosed. This is achieved by supplying between the core and...
6995565 Thermographic wiring inspection  
A method for inspecting a wire, a cable or a bundle of wires to locate those parts of said wires or cables having damaged insulation before failure of the wire or cable occurs, the method...
6977509 System and method for high voltage testing of twisted insulated conductors  
A system and method for high voltage testing of twisted insulated conductors includes a high voltage power supply to be disposed within a rotating mechanism of a twinner. An electrode is coupled to...
6949933 Apparatus and method for monitoring electrical cable chafing via optical waveguides  
A method and apparatus for using optical waveguides to detect chafing of electrical cables. Chafing damage is preferably detected by disposing several optical waveguides about the periphery of an...
6930491 Partial discharge detection test link, partial discharge detection system and methods for detecting partial discharge on a power cable  
A partial discharge detection test link and system is disclosed to detect partial discharge of a power cable accessory. The power cable accessory includes a first accessory component and a second...
6882158 Series arc fault diagnostic for aircraft wiring  
A device for measuring the AC voltage drop across a series of connections under load with no direct electrical contact to the conductors. The presence of a substantial resistance at series contacts...
6812712 Wire test method and apparatus  
A wire testing method and apparatus test wire in-situ in a rigidly installed state, such as an aircraft. An apparatus for rapidly switching the excitation voltage and ground compensates for stray...
6806719 Insulation inspection apparatus for motor  
An insulation inspection apparatus flows a current into power lines arranged along power lines of motors and sequentially switches relays to measure electromotive forces induced in the power lines...
6753685 Power detector with increased detection range  
The invention relates to a device ( 100, 200 ) for use in the detection of the power that passes through an electronic device, comprising means ( 110 ) for division of the power that enters the...
6741081 Cable fault detector  
The present invention is a apparatus and method for accurately finding a location of a fault in a fiber cable where a cable locating current is leaking to ground. The system includes a sensor body,...
6703842 Method for discriminating abnormal current including arc current in AC load circuit and apparatus for executing the same  
An abnormal current discriminating method including an arc current detecting method and the apparatus for performing the same in which the arc current method includes the steps of: extracting a...
6617859 Method for diagnosing insulation degradation in underground cable  
The invention provides a method of on-line diagnosis of insulation degradation in a portion of underground cable including measuring the current flow at first and second locations of the cable...
6611148 Apparatus for the high voltage testing of insulated conductors and oscillator circuit for use with same  
An insulation tester and oscillator circuit for use in same includes a transformer including a primary winding and at least one secondary winding to be coupled across an external load such as an...
6593759 Apparatuses and methods for determining if protective coatings on semiconductor substrate holding devices have been compromised  
In one aspect, the invention includes an apparatus having a semiconductor substrate receiving device with at least one extension configured to hold a semiconductor substrate within a liquid bath....
6577138 Apparatus for detecting arcing and overcurrents in dc electrical systems subject to cyclic disturbances  
Arcing in dc electrical systems subject to cyclic disturbances is detected by a current sensor, and a bandpass filter sensitive to arcing noise, which filters the sensor current. The absolute value...
6566887 Method and device for detecting and locating insulation/isolation defects between conductors  
A system that finds breaches in solid insulation, as well as detecting insufficient air gaps between conductors. The invention solves problems in how to detect breaks in solid insulation by...
6504382 Electrical system with a stress shield system for partial discharge on-line monitoring of the state of high-voltage insulation  
An electrical system and a sensor for on-line monitoring of the state of high-voltage insulation in the electrical system. In this arrangement, the signals associated with partial discharge...
6489782 Electrical system with a stand-off insulator-sensor for on-line partial discharge monitoring of the state of high-voltage insulation  
For an electrical system a sensor and associated circuits are provided for on-line monitoring of the state of the high-voltage insulation in the electrical system. In this arrangement, both the...
6433557 Electrical system with capacitance tap and sensor for on-line monitoring the state of high-voltage insulation and remote monitoring device  
A sensor and associated circuits are provided for on-line monitoring of the state of the high-voltage insulation in electrical equipment with capacitance tap. In this arrangement, both the power...
6340891 Method of diagnosing deterioration of the insulation of an electric power cable  
The diagnosis method of deterioration of electric power cable is that which diagnoses the deterioration accurately without a especial effort to reduce the harmonics in an electric power source...
6337570 Current loop comprising a test circuit  
The 4 mA-20 mA type or 0-20 mA type current loop connects an analog sensor ( 1 ) to an acquisition system ( 3 ), respectively carrying a sensor current (Ic) and an acquisition current (Ia). A test...
6300767 System and apparatus for predicting failure in insulated systems  
A radio frequency (RF) or other form of detector detects discharges of an insulated system which can occur when electrical insulation becomes wet, for subsequent analysis and decision processes....
6225811 Wire degradation testing system  
A part of a wire is tested, in situ, for degradation. The part of the wire is optionally enclosed in a jacket. A conductive medium is disposed on the wire. A test unit has a test elements in...
6208149 Method and apparatus for monitoring electric insulation conditions in energized electric systems  
A method and an apparatus for monitoring conditions of electric insulation in a live or energized electric system. The invention takes into account the fact that, when the insulation resistance of...
6154710 Method and apparatus for searching electromagnetic disturbing source and non-contact voltage probe apparatus therefor  
Voltages and currents of electromagnetic interference developed in cables or the like electrically connected to pieces of electronic equipment are respectively measured by non-contact voltage...
6052050 Two-wire signal transmitter and method for maintaining integrity of electrical contacts  
Two-wire signal transmitter and method in which a very low-level Alternating Circuit (AC) input signal sensed at a remote circuit at a first end of a signal path is added to a low-level Direct...
6051980 Pulse width modulation simulator for testing insulating materials  
A test instrument for testing magnet wire which is provided which tests, collects and permits analyzing the effect of temperature, frequency, voltage and rise time associated with magnet wire use,...
5982165 RF circuit for use in a combined leakage detector and signal level monitor  
An RF circuit for use as a front end for a combined leakage signal detector and signal level monitor includes a shared frequency conversion stage utilized for both leakage signals and signal level...
5949230 Non-contact voltage probe apparatus  
A non-contact voltage probe is used to measure the voltage of electromagnetic interference developed in a cable or the like electrically connected to pieces of electronic equipment. The non-contact...
5870451 Method and apparatus for high impedance ringer detection  
A line test system for diagnosing and segmenting faults in a switched telephone network. The system includes a remote measurement unit installed at a switch and a test system controller. The test...
5854556 Measurement system for partial discharges on dielectrics in coaxial cables  
A method and apparatus for detecting partial discharges in cables and accessories. An electrical interruption is created in, for example, the sheath conductor of a cable, and the voltage of high...
5818245 Impedance measuring  
Impedance of a power system adapted for operation at a predetermined line frequency is measured by providing a test signal of frequency different from the predetermined line frequency by an...
5726575 Path for acquiring a voltage pulse, and a method and a system for measuring partial discharges and provided with such a path  
The invention relates to an acquisition path for acquiring a voltage pulse, and to a system and a method making use of said path, the path comprises: a path input for a pulse signal; a module for...
5612624 Apparatus for testing the insulation of an electrical conductor  
An apparatus for testing the insulation of an insulated electrical conductor has an alternating current high voltage power source which provides a high test voltage between the electrical conductor...
5574377 Device for the detection and localization of organic solvent leakages and fabrication process  
A device for detection of the presence of organic solvents, and a process for the fabrication of the device. This device is particularly useful as a device for the detection and localization of...
5519324 Withstand voltage-testing apparatus  
A withstand voltage-testing apparatus includes a high voltage generator for applying a high voltage to a work, the withstand voltage of which is to be measured. A ground conductor covers the work...
5481198 Method and device for measuring corrosion on a portion of a metallic path carrying an undetermined load current  
A method for determining whether a metallic path (such as a wire) under test carrying an undetermined load current is so corroded as to require replacement applies a test current to the metallic...
5471144 System for monitoring the insulation quality of step graded insulated high voltage apparatus  
A non-ferrous current sensor is used to continuously measure the charging current magnitude in step-graded foil and paper insulation systems used on high voltage measurement and control apparatus...
5469066 Method and apparatus for measuring deterioration of power cable insulation  
A system for detecting a power cable for water treeing and other forms of deterioration based on the dielectric loss of the insulation of the cable. An AC test signal is injected to the conductor...
5448176 Cable fault detection using a high voltage alternating polarity DC signal superposed with a system frequency AC signal  
Test apparatus for a high voltage cable installation includes a high AC voltage source having the frequency range intended to be carried by the cable installation and a high DC voltage source. A...
5381098 Transmission line sparking locator  
This invention is an apparatus for detecting and pinpointing the sources of sparking electromagnetic RF radiation emanating from high and extra high voltage power lines in the presence of high...
Matches 1 - 50 out of 127 1 2 3 >