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30results about How to "No partial discharge" patented technology
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Preparation method of silicon nitride ceramics ring for polysilicon reduction furnace
The invention relates to a preparation method of a silicon nitride ceramics ring for a polysilicon reduction furnace, comprising the following steps: weighing various raw materials, and stirring in media to obtain evenly mixed slurry; after the slurry is dried, prilling to prepare base stock; pressing and shaping to prepare a green body; processing by a lathe or a grinder into preset shape and size; sintering the processed green body into an atmosphere pressure sintering furnace; and carrying out finish machining to a sintered finished product to obtain the ceramics ring finished product. Thepreparation method has the beneficial effect that silicon nitride ceramics ring has good insulativity, high toughness, and good thermostability and antiknock characteristic, the service life can be prolonged, and added agglomerant is favourable for densification. The invention can satisfy environment use requirement of a polysilicon reduction furnace, has long service life and improves work efficiency.
Owner:SINOMA SYNTHETIC CRYSTALS CO LTD +1
Self-rising and falling large-capacity non-partial discharge test transformer platform and test method used in converter valve hall
InactiveCN110763960AImprove efficiencyGuarantee construction progressTesting dielectric strengthPartial dischargeTransformer
The invention provides a self-rising and falling large-capacity non-partial discharge test transformer platform and test method used in a converter valve hall. The self-rising and falling large-capacity non-partial discharge test transformer platform used in the converter valve hall includes a platform chassis, a transformer support fixed on the platform chassis, a hydraulic cylinder fixing support, a hydraulic station, rollers installed at the bottom of the platform chassis, and a chassis fixing device; the transformer support and the hydraulic cylinder fixing support are used for fixing thetest transformer and the hydraulic cylinder separately; the hydraulic cylinder is used for converting the test transformer in horizontal and vertical states; and the transformer support, the liftinghydraulic cylinder, and rotating shafts at the fixing support, the transformer supporting, and the lifting hydraulic cylinder cooperate with the lifting hydraulic cylinder to lift and lower the test transformer. The self-rising and falling large-capacity non-partial discharge test transformer platform and test method used in the converter valve hall can perform unilateral voltage application long-term induction withstand voltage and partial discharge measurement test on the valve hall field for a layered access converter transformer up to 1,100kV, so as to simply and efficiently carry out theunilateral voltage application long-term induction withstand voltage and partial discharge measurement test on the valve hall field of the converter transformer.
Owner:STATE GRID HUBEI ELECTRIC POWER RES INST +1
Shielding box for high potential control panel of high-power thyristor device
ActiveCN104219943AImprove shielding effectImprove sealingMagnetic/electric field screeningThyratronEngineering
The invention provides a shielding box for a high potential control panel of a high-power thyristor device. The shielding box comprises a substrate A, a substrate B, a side plate A and a side plate B. The substrate A and the substrate B are connected to form a cuboid frame with a semi-closed space, and the side plate A and the side plate B are respectively arranged on two sides of the cuboid frame perpendicular to the substrates and are provided with cooling fins. The high potential control panel of the thyristor device is fixed on the side plate B through four nylon struts, a square heat conduction silica gel piece adheres between the high potential control panel and an inner wall of the side plate B, a rectangular groove is formed in the substrate A and used for placing the high potential control panel, and a square heat conduction silica gel piece adheres between the high potential control panel and the rectangular groove. Compared with the prior art, the shielding box for the high potential control panel of the high-power thyristor device is of a compact plug type structure, has good shielding performance, is resistant to dust and dirt, meets the electromagnetic compatibility test requirements, is high in heat dissipation efficiency and free of partial discharge and improves reliability of the control panel.
Owner:STATE GRID CORP OF CHINA +2
Intelligent dry-type transformer and production process thereof
InactiveCN107068337AFlame retardant self extinguishingImprove fire performanceTransformers/reacts mounting/support/suspensionTransformers/inductances coolingLow noiseLow voltage
The invention discloses an intelligent dry-type transformer and production process thereof. The intelligent dry-type transformer comprises bases, transformers and an upper rack, wherein a cushion block, a draught fan, bidirectional wheels and grounding screws are arranged on the bases, the transformers are fixedly connected to the cushion block, high-voltage connection pieces, high-voltage connection rods, high-voltage taps and high-voltage connection pipes are arranged on side surfaces of the transformers, each transformer internally comprises a cooling air duct, a high-voltage coil, a low-voltage coil and an iron core, upper ends of the transformers are fixedly connected with the upper rack, and a clamping piece, high-voltage terminals, hanging rings and low-voltage outgoing line copper plates are arranged on the upper rack. The intelligent dry-type transformer has favorable performance such as fire resistance, does not contain flammable resin, also does not contain toxic gas, and also has the characteristics of flame retardance and self extinguishing; and the intelligent dry-type transformer has the advantages of low energy consumption, low noise, no pollution, no maintenance, good insulation property, no local discharge, high lightning impulse resistant capability, high mechanical strength, temperature change resistance, high short-circuit resistant capability and humidity resistance, and can run under high humidity.
Owner:JIANGSU CRANES ARE ELECTRICAL APPLIANCES
Inductive power-taken high-voltage power verifying displayer
InactiveCN104267247AReduce complexityReduce difficultyIndicating presence of current/voltageElectrical devicesComputer module
The invention relates to an inductive power-taken high-voltage power verifying displayer and aims to solve the problem that the conventional high-voltage power verifying display device is deficient. The inductive power-taken high-voltage power verifying displayer comprises a passive induction power-taken part, wherein the passive induction power-taken part is connected to a reception controlling module; the reception controlling module is connected to a trigger displayer; the passive induction power-taken part, the reception controlling module and the trigger displayer are connected to an inductive power-taken device; the inductive power-taken device is connected with a storage battery rectifying circuit; the storage battery rectifying circuit is connected with a storage battery; the passive induction power-taken part is mounted on high-voltage electrical equipment; the inductive power-taken device is a plate condenser positioned in an alternating electric field. According to the invention, the mounting and maintenance are simple and convenient, the normal operation of a power network cannot be influenced, a power source doesn't need to be added, and the inductive power-taken high voltage power verifying displayer is suitable for working environment indoors and outdoors.
Owner:STATE GRID CORP OF CHINA +1
Four-in-one mica tape and insulating method for applying same to motor leading-out wire connection part
ActiveCN105245049AGood flexibilityHigh tensile strengthWindings insulation shape/form/constructionSynthetic resin layered productsFiberAdhesive
The invention discloses a four-in-one mica tape, which comprises a first polymer thin film, a reinforced fiber cloth, mica paper and a second polymer thin film, wherein the layers of materials are adhered by using a high temperature resistant adhesive. The invention further discloses an insulating method for applying the four-in-one mica tape to a motor leading-out wire connection part. The four-in-one mica tape provided by the invention replaces ordinary mica tapes and serves as wrapping insulation materials for the leading-out wire connection part, has excellent flexibility, is tightly attached to the leading-out wire connection part of a high-voltage motor, is high in tensile strength, and is not prone to crumple; further, the internal structure of the four-in-one mica tape is even, compact and voidless, is not prone to be layered, and has good moisture-proof effect. By adopting the insulating method provided by the invention, the insulation structure of the leading-out wire connection part is fully sealed and insulated integrally, the interior of the insulation structure is compact and voidless, and partial discharge cannot be produced.
Owner:ZHUZHOU TIMES ELECTRIC INSULATION
Offshore carbon fiber wind power blade lightning protection system
InactiveCN110307127AEvenly distributedNo gap dischargeMachines/enginesWind energy generationFiberElectricity
The invention relates to the technical field of lightning protection equipment, and discloses an offshore carbon fiber wind power blade lightning protection system. The system comprises a blade tip lightning arrester, a metal net, a plurality of conducting plates, a conducting bolt and a conducting wire, wherein the conducting wire is connected with the conducting bolt, the conducting plates comprise a plurality of paired blade root conducting plates and a plurality of paired blade tip conducting plates, the blade tip lightning arrester and the blade tip conductive plates are fixed at the tipof the blade and are connected through the conducting bolt, the plurality of blade root conducting plates are fixed to the root portion of the blade and are connected with the conducting bolt, and themetal net cover a main beam of the blade. According to the system, lightning is transmitted to the metal net through the blade tip lightning arrester and the blade tip conducting plates and then is transmitted to the blade root conducting plates, so that no interruption and sudden change of currents is generated in the whole lightning protection system, and gap discharge and partial discharge areavoided, current conduction is uniform, heat distribution caused by current conduction is uniform, and local overheating aging is avoided.
Owner:JILIN CHONGTONG CHENGFEI NEW MATERIAL
Voltage guiding device, sealing device and method for manufacturing insulating hydrophobic coating layer
The invention discloses a voltage guiding device, a sealing device and a method for manufacturing an insulating hydrophobic coating layer. The surface of the voltage guiding device is coated with an insulating hydrophobic coating layer for increasing a surface contact angle. The voltage guiding device comprises a lead, an external mounting flange, an internal mounting flange, an outer side grading shield, and an inner side grading shield. The lead penetrating a wall body of a sealing device is used for guiding a needed voltage into the inside of the sealing device. The external mounting flange is installed at the outer side of the wall body; and a screw hole for fixation is arranged at the connection part of the external mounting flange and the outer side of the wall body, thereby realizing fixed connection between a guiding rod and the wall body. The internal mounting flange is installed at the inner side of the wall body; and a screw hole for fixation is arranged at the connection part of the internal mounting flange and the inner side of the wall body, thereby realizing fixed connection between the guiding rod and the wall body. The outer side grading shield is connected to the external mounting flange detachably in a covering mode; and the inner side grading shield is connected to the internal mounting flange detachably in a covering mode. Therefore, a high voltage can be guided safely to carry out a high-humidity environment voltage test and corona discharging caused by water drops can be prevented effectively.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
Lightning protection high-voltage live-line digital display and blocking apparatus
InactiveCN105375637AHigh precisionNo partial dischargeCircuit arrangementsInformation technology support systemLED displayEngineering
The invention provides a lightning protection high-voltage live-line digital display and blocking apparatus. The apparatus comprises a sensor, an input protection unit, a lightning arrester, a filter, a signal processing unit, an output driving unit, an LED display screen and a blocking contact, wherein the sensor is connected with the input protection unit, the input protection unit is successively connected with the filter, the signal processing unit and the output driving unit through a lead wire, the output driving unit is respectively connected with the LED display screen and the blocking contact through the lead wire, and a self-check unit and the lightning arrester are respectively connected between the input protection unit and the filter through the lead wire. In case of stormy weather or normal weather, the apparatus can be used for indicating live-line conditions and size of voltages of high-voltage equipment and can also block correlation electrical equipment in a forced mode, so that the operation safety of switch electrical equipment is improved, output voltage data is synchronized to a monitoring room, and real-time monitoring is realized.
Owner:CHONGQING ZHENYUAN ELECTRICAL CO LTD
3-35kv electromagnetic multi-functional voltage transformator
ActiveCN102368431ACompact structureReduce lossTransformersTransformers/inductances coils/windings/connectionsInstrument transformerConductor Coil
The invention relates to a 3-35kV electromagnetic multi-functional voltage transformator which comprises an iron core, a primary winding and a main secondary winding; the primary winding and the main secondary winding are wound on the iron core; an auxiliary secondary winding is also wound on the iron core; and a tap is arranged on the auxiliary secondary winding. According to the voltage transformator, the auxiliary secondary winding with the tap is additionally arranged on the iron core, so that the functions of a grounded transformator and a non-grounded transformator are realized on the same transformator, and the 3-35kV electromagnetic multi-functional voltage transformator has a simple and compact structure, low losses and no local discharge, is convenient to use, has high safety performance, is maintenance-free, and is applicable to 3-35kV voltage systems.
Owner:江苏科兴电器有限公司
Epoxy resin cast coil for dry-type transformer
InactiveCN105140006ASimple manufacturing processWidthwise thickness reductionTransformers/inductances coils/windings/connectionsEpoxyGlass fiber
The invention discloses an epoxy resin cast coil for a dry-type transformer. The epoxy resin cast coil comprises a coil body (2) which is formed by casting a multilayered structure wound by a wire (1) with epoxy resin (4), wherein the wire (1) comprises a conductive body (101) and glass fiber ribbons (102) spirally wound and fixed on the peripheral surface of the conductive body (101); the adjacent glass fiber ribbons (102) on the conductive body (101) are arranged at intervals. The epoxy resin cast coil has the advantage that the transformer adopting the coil does not partially discharge after being energized for operation.
Owner:宁波甬嘉变压器有限公司
Process for producing transposition composite lead
InactiveCN102097182AEasy to operateNo other phenomenaTransformers/inductances coils/windings/connectionsInsulating conductors/cablesEngineeringCopper
The invention discloses a process for producing a transposition composite lead, comprising the following steps of: enameling a group of one-step formed bare copper flat wires; transposing the finished enameled wires; insulating the transposed enameled wires via paper packing and arranging the enameled wires in parallel along a narrow edge; and uniformly wrapping insulating paper outside the paper packed enameled wires which are arranged in parallel along the narrow edge so as to obtain the transposition composite lead. In the invention, a coil winding process is easy for operation; and when the obtained transposition lead is applied to ultrahigh voltage transformers and extra-high voltage transformers, favorable impact voltage distribution is provided and the local discharging of coils is reduced.
Owner:JIANGSU ZHONGRONG ELECTRIC
Epoxy resin dry-type wall bushing
InactiveCN105703293ALarge insulation marginIncrease the corona onset voltageElectrical apparatusTemperature resistanceCapacitance
The invention discloses an epoxy resin dry-type wall-through bushing, which comprises an insulator which is mainly made of an outdoor epoxy resin added with auxiliary materials such as a curing agent and a toughening agent. The inner center of the insulator is provided with a The carrier fluid is provided with a metal flange in the middle of the outside, and a metal cover is provided at each end; the side of the metal flange is in the shape of a "ten", and the insulators at both ends are in the shape of multi-layer sheds, and the metal The upright part of the flange is wrapped in the insulator, and the outer surface is exposed outside the insulator; the upright part of the metal flange exposed outside the insulator is provided with a measuring terminal, and the measuring terminal is connected with a capacitive screen arranged in the insulator. This epoxy resin dry wall bushing has no oil, no gas and pure solid, high temperature resistance, stable electrical performance, no danger of combustion and explosion, compact structure, small size, easy transportation, high bending strength, excellent mechanical properties, Long service life and low long-term operating costs.
Owner:苏州翰为电气科技有限公司
High-voltage winding and dry-type transformer
PendingCN114300235AInhibit deteriorationExtended service lifeTransformers/inductances coils/windings/connectionsUnwanted magnetic/electric effect reduction/preventionVulcanizationTransformer
The high-voltage winding comprises a winding body, a high-voltage coil and a high-voltage insulating layer, a wire is wound on the winding body to form the high-voltage coil, the winding body is made of a fiber reinforced composite material, the high-voltage insulating layer wraps the high-voltage coil and the winding body, and the high-voltage insulating layer is made of high-temperature vulcanized silicone rubber. The invention further discloses a dry-type transformer which comprises the high-voltage winding. The high-voltage winding provided by the invention has relatively good fireproof performance, low-temperature resistance, aging resistance and short-circuit test resistance, is excellent in electrical insulation performance, and is energy-saving and environment-friendly.
Owner:JIANGSU SHENMA ELECTRIC CO LTD
Casting mould for high-voltage coil for dry-type transformer
The invention discloses a casting mould for a high-voltage coil for a dry-type transformer, which comprises an inner mould and an outer mould, wherein the inner mould is arranged in a vacuum chamber, and the outer mould is arranged on the outer layer of the inner mould. The casting mould for the high-voltage coil for the dry-type transformer is characterized in that the upper ends and the lower ends of the inner mould and the outer mould are respectively provided with bottom plates connected with the end parts of the inner mould and the outer mould; a coil casting cavity is formed among the inner mould, the outer mould and the bottom plates; the outer mould is provided with a casting hole; the casting hole is also provided with a coil outlet template; and the coil outlet template is locked on the outer mould through fixed sword iron. By adopting the casting mould for the high-voltage coil for the dry-type transformer, the structure is simple, and the use is convenient; the coil can be conveniently cast and shaped under a vacuum condition; partial discharge does not happen; the coil has the excellent property of not generating bubbles; after being manufactured and shaped, the produced coil can be easily taken out, and the product precision is accurate. Moreover, the labor strength of workers is reduced, the labor cost is saved, and the production efficiency is improved. Moreover, the casting mould for the high-voltage coil for the dry-type transformer is highly flexible and is easy to popularize and apply.
Owner:SUZHOU DINGNENG ELECTRIC POWER EQUIP
Arrangement having a sensor body and method for the production of an arrangement having a sensor body
InactiveCN101868897AAvoid supplementary processingNo partial dischargeSwitchgear arrangementsTotally enclosed bus-bar installationsEngineeringFlange
Owner:SIEMENS AG
Voltage guiding device, sealing device and method for making insulating hydrophobic coating
The invention discloses a voltage guiding device, a sealing device and a method for manufacturing an insulating hydrophobic coating layer. The surface of the voltage guiding device is coated with an insulating hydrophobic coating layer for increasing a surface contact angle. The voltage guiding device comprises a lead, an external mounting flange, an internal mounting flange, an outer side grading shield, and an inner side grading shield. The lead penetrating a wall body of a sealing device is used for guiding a needed voltage into the inside of the sealing device. The external mounting flange is installed at the outer side of the wall body; and a screw hole for fixation is arranged at the connection part of the external mounting flange and the outer side of the wall body, thereby realizing fixed connection between a guiding rod and the wall body. The internal mounting flange is installed at the inner side of the wall body; and a screw hole for fixation is arranged at the connection part of the internal mounting flange and the inner side of the wall body, thereby realizing fixed connection between the guiding rod and the wall body. The outer side grading shield is connected to the external mounting flange detachably in a covering mode; and the inner side grading shield is connected to the internal mounting flange detachably in a covering mode. Therefore, a high voltage can be guided safely to carry out a high-humidity environment voltage test and corona discharging caused by water drops can be prevented effectively.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
A shielding box for a high-potential control board of a high-power thyristor device
ActiveCN104219943BImprove shielding effectImprove sealingMagnetic/electric field screeningThyratronTest requirements
The invention provides a shielding box for a high potential control panel of a high-power thyristor device. The shielding box comprises a substrate A, a substrate B, a side plate A and a side plate B. The substrate A and the substrate B are connected to form a cuboid frame with a semi-closed space, and the side plate A and the side plate B are respectively arranged on two sides of the cuboid frame perpendicular to the substrates and are provided with cooling fins. The high potential control panel of the thyristor device is fixed on the side plate B through four nylon struts, a square heat conduction silica gel piece adheres between the high potential control panel and an inner wall of the side plate B, a rectangular groove is formed in the substrate A and used for placing the high potential control panel, and a square heat conduction silica gel piece adheres between the high potential control panel and the rectangular groove. Compared with the prior art, the shielding box for the high potential control panel of the high-power thyristor device is of a compact plug type structure, has good shielding performance, is resistant to dust and dirt, meets the electromagnetic compatibility test requirements, is high in heat dissipation efficiency and free of partial discharge and improves reliability of the control panel.
Owner:STATE GRID CORP OF CHINA +2
Quasi-reciprocal reflection type optical fiber temperature sensor
ActiveCN112629697AHigh sensitivityNo partial dischargeThermometers using physical/chemical changesMetallic materialsPolarizer
A disclosed quasi-reciprocal reflection type optical fiber temperature sensor is characterized by comprising an ASE light source, the ASE light source is connected with a circulator, the circulator is connected with a polarizer and a PIN photoelectric detector, the polarizer is connected with a temperature sensing unit, the PIN photoelectric detector is connected with a digital signal processor, and the digital signal processor is connected with a signal output and control interface; and a temperature sensing unit comprises a sensing optical fiber and a compensation optical fiber, the two ends of the compensation optical fiber are connected with the polarizer and the sensing optical fiber respectively, and the tail end of the sensing optical fiber is plated with a reflecting film. The temperature sensor is composed of an all-fiber structure, coating of metal materials is not needed, partial discharge does not exist, the sensitivity of the temperature sensor can be improved, the temperature sensing part is of a reciprocal structure, the high-birefringence photonic crystal fiber serves as a sensing fiber, the external interference resistance is high, and the sensitivity is high.
Owner:SHANGHAI WISCOM SUNEST ELECTRIC POWER TECH
3-35kV electromagnetic multi-functional voltage transformator
ActiveCN102368431BCompact structureReduce lossTransformersTransformers/inductances coils/windings/connectionsInstrument transformerConductor Coil
Owner:江苏科兴电器有限公司
Inductor for high-voltage cable oscillatory wave partial discharge test system of 30kV and below
PendingCN110888023AInhibitionTo achieve the role of insulating supportBase element modificationsTesting vessel constructionInductorElectrical performance
The invention belongs to the field of power transformation and the technical field of measurement and test and particularly relates to an inductor for a high-voltage cable oscillatory wave partial discharge test system of 30kV and below, a barrel is connected between an upper panel and a lower panel, an inductor is arranged in the barrel, and the upper panel and the lower panel are connected withelectrodes and thin copper sheets. The inductor is formed by adopting an insulating annular structure, the height is reduced and the size is reduced on the premise that the electrical performance is not affected; the anti-corona electrodes and the thin copper sheets are firmly connected, so corona generation is effectively inhibited; a PEK screw rod can effectively achieve an insulation supportingeffect so that insulation performance and mechanical performance of the PEK screw rod are enhanced; the novel inductance structure design of a 30KV cable oscillatory wave partial discharge test system is realized; cable oscillatory wave partial discharge detection has characteristics of high voltage, no partial discharge, small size, simple structure and convenience in operation, and is suitablefor popularization and application.
Owner:STATE GRID LIAONING ELECTRIC POWER RES INST +5
Interruption unit having vacuum tube and insulating housing
PendingCN114175201ANo localized corrosionNo partial dischargeHigh-tension/heavy-dress switchesAir-break switchesClassical mechanicsVacuum switch
The invention relates to an interruption unit comprising a vacuum switching tube (4) and an insulating housing (6), the insulating housing (6) having an inner surface (8) and the vacuum switching tube (4) being at least partially bounded by an electrically insulating structural material (22), the structural material having an outer surface (10) and the insulating housing (6) at least partially surrounding the vacuum switching tube (4), the inner surface (10) of the insulating housing (6) and the outer surface (10) of the vacuum switching tube (4) are separated by an adhesive layer (12) in the ready-to-operate state of the interrupting unit (2), characterized in that both the inner surface (8) and the outer surface (10) are at least partially provided with an electrically conductive layer (14, 16), the vacuum switching tube (4) and the insulating housing (6) are arranged in such a way that in a boundary region (18) between the vacuum switching tube (4) and the insulating housing (6), the following layers are aligned radially outward from the switching axis (20): a structural material (22) of the vacuum switching tube, an outer surface (10) of the structural material (22), an electrically conductive layer (16) on the outer surface (10) of the structural material (22), an adhesive layer (12), an electrically conductive layer (14) on the insulating housing (6), and an inner surface (8) of the insulating housing, and a volumetric material (24) of the insulating housing (6).
Owner:SIEMENS ENERGY GLOBAL GMBH CO & KG
Switchgear for high voltage circuits
ActiveCN103401545BSolving Partial DischargeNo partial dischargeElectronic switchingControl signalLow voltage
The invention discloses a switching device for a high voltage loop. The switching device for the high voltage loop comprises a low voltage end, a high voltage end and a connection unit, wherein the low voltage end is connected to a low voltage loop and is used for receiving a control signal from the low voltage loop; the high voltage loop is switched off or conducted under the control of the control signal; the high voltage end comprises a high voltage end cavity; a gap in the high voltage end cavity is totally filled with a solid insulated filler; the connection unit comprises a first end and a second end; the first end is connected to the low voltage end; the second end is connected to the high voltage end. By the switching device, partial discharge cannot be generated when a switch controls a high voltage power transmission system to carry out safe conduction and switching-off operations.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Wire and foil mixedly winding coil grounding transformer
InactiveCN101651020BSuppress shockFirmly connectedTransformers/inductances coils/windings/connectionsCoils manufactureCapacitanceElectrical conductor
The invention belongs to the field of dry type reactor, in particular to a wire and foil mixedly winding coil grounding transformer, comprising an iron core, a high pressure coil and a support frame, wherein, the high pressure coil comprises an inner coil and an outer coil; an airway is arranged between the inner coil and the outer coil; the inner coil adopts an enameled flat type copper wire as a conductor to wind in separated layers; a vacuum dipping glass grating plate is arranged between each layer; an inner connecting terminal which is used for coating a high pressure shrinkable tube is arranged respectively at two ends of the inner coil; the outer coil adopts copper foil to serve as the conductor to wind in separated layers; an electric insulating basal membrane is arranged between each circle; the two ends of the outer coil are provided with outer connecting terminals; the middle part is provided with a tapping terminal; and the inner side of the inner coil, the inner side and the outer side of the outer coil are respectively wound with an insulating layer. In the invention, the interturn capacitance of the transformer is distributed in equalization; and the invention has excellent electric insulating performance of no partial discharge and thunder impact resistance and is mainly applied to a 10-35 kV power grid grounding protection system.
Owner:济南西电特种变压器有限公司
Arrangement having sensor body and method for production same
InactiveCN101868897BAvoid supplementary processingNo partial dischargeSwitchgear arrangementsTotally enclosed bus-bar installationsEngineeringFlange
Owner:SIEMENS AG
Surface acoustic wave temperature sensor with locking device
PendingCN114838839AClose contactPrevent looseningThermometers using physical/chemical changesEngineeringSurface acoustic wave
The invention discloses a surface acoustic wave temperature sensor with a locking device. The surface acoustic wave temperature sensor comprises an outer cover, a sensor antenna, a sensor temperature sensing chip, a printed board, a metal bottom plate, a locking mechanism and a metal ribbon, the metal cable ties comprise the first metal cable tie and the second metal cable tie, one end of the first metal cable tie is connected to one side of the metal bottom plate in a buckled mode, and the other end of the first metal cable tie is connected to the adjusting part of the locking mechanism. One end of the second metal cable tie is buckled and connected to the other side of the metal bottom plate, and the other end of the second metal cable tie is connected to the fixing part of the locking mechanism; the locking mechanism is configured to adjust the length of the first metal cable tie between the metal bottom plate and the locking mechanism through the adjusting part; the printed board is welded and fixed on the metal bottom plate, and the sensor temperature sensing chip and the sensor antenna are welded on the printed board and are connected through a microstrip line on the printed board; and the outer cover is arranged outside the sensor antenna and is fixed on the metal bottom plate.
Owner:苏州光声纳米科技有限公司
Preparation method of silicon nitride ceramics ring for polysilicon reduction furnace
Owner:SINOMA SYNTHETIC CRYSTALS CO LTD +1
Cable outlet system for high voltage cable oscillatory wave partial discharge detection system
ActiveCN103123381BSimple structureIncrease connection distanceTesting dielectric strengthMeasurement leads/probesControl theoryElectric cables
The cable wire system for high voltage cable oscillation wave partial discharge detection system comprises a side connection mechanism of units under test, a side connection mechanism of solid switches and high voltage connecting lines, wherein the side connection mechanism of units under test includes a connecting piece of units under test and a first cable connector and the connecting piece of units under test is connected with the units under test. The side connection mechanism of solid switches includes a solid switch connecting piece and a second cable connector and the solid switch connecting piece is connected with the solid switch. The two ends of high voltage connecting line are respectively connected with the first cable connector of the side connection mechanism of units under test and the second cable connector of the side connection mechanism of solid switches. The system is simple in structure. Further, the cable wire system is not easy to generate corona and to discharge through the design which the cable wire part has a large distance from cable oscillation wave testing device, so that the system is stable and reliable in connection, capable of no partial discharge and beneficial to site test.
Owner:STATE GRID SHANDONG ELECTRIC POWER +1
Voltage guiding device, sealing device and method for making insulating hydrophilic coating
ActiveCN106251994BLower contact angleImprove the electric fieldInsulatorsHydrophilic coatingHigh humidity
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
Plasma display panel
InactiveCN102893366AImproved secondary electron emission characteristicsImprove responsivenessAlternating current plasma display panelsTectorial membraneSurface layer
Disclosed is a PDP wherein the configuration of the periphery of a protection film is improved, excellent secondary electron emission characteristics are exhibited, and high efficiency and long service-life can be expected. Furthermore, generation of a discharge delay is eliminated when the PDP is being driven, and high-quality image display performance can be expected even in the high-speed driven and highly fine PDP. Specifically, on the dielectric layer (7) surface on the discharge space side, a crystalline film is formed as a protection film (8) to be a surface layer having a film thickness of approximately 1 [mu]m, said crystalline film having Sr at a concentration of 11.8-49.4 mol% added to CeO2. On the crystalline film, high-[gamma] fine particles (17) having secondary electron emission characteristics higher than those of the protection film is disposed, thereby improving the secondary electron emission characteristics, luminance, efficiency and reliability of the protection film.
Owner:PANASONIC CORP
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