eans for detecting the presence of an arc or discharge (H01H9/50)

Device for detecting partial discharges // 2553281
FIELD: electricity.SUBSTANCE: device for detecting partial discharges comprises high-voltage direct-current power supply source with high-voltage capacitor connected to it through one position of switch key; through the second position of switch key the tested facility is connected with a sensor connected to the facility. Oscilloscope is coupled to the sensor through a shielded wire. Direct-current power supply source, capacitor and sensor are interconnected at common point and grounded. The technical effect is as follows: device for detecting partial discharges allows diagnosing direct-current machines.EFFECT: potential detection of partial discharge signals in insulation of direct-current motors.1 dwg

Electric arc detector and method for detection of undesired electric arcs pertaining thereto // 2455721
FIELD: electricity.SUBSTANCE: electric arc detector for detection of undesired electric arcs contains an antenna for receipt of the electromagnetic signal representing the electric arc and a discriminator for analysis of the signal from the antenna. The discriminator contains a spectrum analyser designed so that to enable detecting whether the signal represents a normal electric arc or an undesired electric arc. The discriminator is designed so that to enable detecting whether the signal represents a normal electric arc or an undesired electric arc by way of comparing the levels of signal at the signal spectrum frequencies corresponding to at least one partial reference spectrum and defining of an electric arc a normal one if the deviation from the reference spectrum is less than the threshold deviation. Additionally presented is a corresponding method.EFFECT: establishment of difference between normal and undesired electric arcs.13 cl, 3 dwg

easurement device of partial discharges // 2402092
FIELD: electricity.SUBSTANCE: measurement device of partial discharges includes sensor of partial discharges, which is made in the form of inductance coil, analogue-digital and optic converters, which are all located inside electrostatic screen and having common grounding, and common power supply source of converters; at that, input of analogue-digital converter is connected to potential output of inductance coil, and its output is connected to input of optic converter to the output of which there attached is optic cable connected to external measurement device. Device is equipped with signal and magnetising windings located on electrostatic screen and having common grounding with the above elements, and with amplifier with negative amplification factor; at that, signal winding is connected to amplifier input, and magnetising winding is connected to amplifier output.EFFECT: increasing interference immunity of measurement device of partial discharges.3 cl, 1 dwg

Device for monitoring of partial discharges threshold level // 2340976
FIELD: electrical engineering.SUBSTANCE: invention is related to devices of high-voltage equipment insulation condition diagnostics in process of operation (insulation condition monitoring). Tire relay contacts are serially connected in the device to element of indication and switch, and winding of time relay is connected to control circuits of high-voltage breakers of distribution device, in which threshold level of partial discharges is monitored. Thereby, false actuations of device are eliminated during operation in insulation monitoring mode by breaking of measuring circuit for the time of switching of high-voltage breakers of distribution device.EFFECT: elimination of false actuations of device for control of threshold level of partial discharges during operation in mode of insulation condition monitoring.1 dwg

Device of contact burn detection in commutation equipment // 2339111
FIELD: physics, communication.SUBSTANCE: invention concerns device of contact burn detection in switch contacts of electric commutation device. Contact burn is detected on at least one opening and closing switch contact couple in commutation device. Device includes light guide and detector, where light emitted by at least one light source is fed to light guide and directed over light guide to detector. Light guide is positioned against at least one couple of switch contacts in such pattern that intensity of light fed to light guide and measured by detector decreases at the growth of contact burn particles number, appearing due to contact burn in electric commutation device.EFFECT: extended equipment inventory for contact-free control of contact burn by optic electronic devices without removal of commutation equipment from its operation place.11 cl, 6 dwg

Device for measuring partial discharges // 2262765
FIELD: condition inspection of high-voltage equipment.SUBSTANCE: partial discharge sensor is made in the form of inductance coil disposed inside electrostatic screen; its potential lead is connected in series with analog-to-digital and optical converters provided with common power unit; optical fiber cable is connected to output of optical converter; partial discharge sensor, both converters, and common power unit are connected to ground through same ground connection; common power unit may be fuel cell battery, storage cell, or converter that functions to convert ac voltage induced in partial discharge sensor into dc voltage.EFFECT: enhanced noise immunity in partial discharge measurements.3 cl, 2 dwg
 
2551342.
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