108results about How to "Guaranteed Dielectric Strength" patented technology

The invention relates to an on-line temperature measuring method for the cable joints of a high voltage device; three temperature sensors are stuck on the surfaces of three metal conductive bodies; current induction coils are sheathed on the metal conductive bodies; a power circuit, microprocessors and wireless emitters are arranged on the metal conductive bodies and sealed in an insulator by circuit boards; the digital identifying codes of the three output ends of the measured cable joints are written in the microprocessors of each own; three metal conductive bodies sealed by insulating materials are respectively arranged at the three-phase output ends of the cable joints; each current induction coil after inducing that the currents are processed by the power circuit provides a working power for the temperature sensor, the microprocessor and the wireless emitter of each own; the microprocessors emit the monitored temperature signals and corresponding identifying codes by the wireless emitters; a wireless receiver receives the wireless electric signals of each circuit, demodulates the wireless electric signals into digital signals and transmits the digital signals to a display instrument; the display instrument receives and identifies three corresponding cable joints. The on-line temperature measuring method can instantly accurately monitor the temperature of the cable joints of the high voltage device on line.

The invention relates to a preparation method for an electric insulating layer material with the photoinduced self-repair function for microdischarge defects, and belongs to the technical field of electrical equipment. The electric insulating layer material is a composite material, and based on thermosetting epoxy resin and a microcapsule containing a photosensitive resin repairing agent; the microdischarge defects can be cured and repaired by the repairing agent under ultraviolet light, so that the condition that the insulation strength of the material is not obviously reduced is ensured. The electric insulating layer material prepared by the method disclosed by the invention has the characteristics of being simple to prepare, high in repairing efficiency and capable of keeping the effect for a long time, can be widely applied to the electric insulating layers of power transmission and distribution cables or accessories and electronic devices, and can effectively prolong the service life and the stability in use of the electric insulating material.

The invention relates to an ultrahigh-voltage oil-SF6 sleeve test device which overcomes the shortcomings and defects of single test ability, low test voltage grade and vertical arrangement of sleeve samples of the existing oil-SF6 sleeve test device. The device comprises a test oil tank, a GIS (Gas Insulated Switchgear) bus tube, a GIS sleeve, an oil-SF6 sleeve, an oil conservator, a transition plate, a support base and accessories, and is characterized in that: the oil-SF6 sleeve sample is horizontally mounted. The insulating property of the device can meet the insulation requirement of the sleeve test device with a grade between 500KV and 1,100KV; the actual operation conditions of the oil-SF6 sleeve can be simulated; the sleeve mounting height of the whole test device is reduced, thereby being favorable for the transportation and disassembly/assembly; and meanwhile, the requirements for the structural strength and safety of the test device are reduced, and the requirement for the height of the hall building of the test environment is reduced.

The invention relates to a large current equipment pin equipment cooler circuit. It is characterized in that it comprises a large current device pin (10) and an evaporative cooling circulation system; the large current device pin (10) is formed by a solid conductor and circular or polygonal hollow conductor or hollow pipe conductor; it injects the evaporative cooling media in the hollow conductor. The current can lead the loss and the winding heats whose heat transmits to the cooling media of the hollow conductor, when the temperature lifts to the corresponding saturation temperature; the winding inner hollow conductor evaporative cooling media evaporates to form boiling heat transfer and then uses cooler to be liquefied, and then cycles.

The invention provides a glue pouring electronic token and a glue pouring process method, relating to a dynamic password device and a glue pouring process thereof. The invention aims at solving the problems that local circulation is easy to be nonuniform when filling in the existing electronic token and the glue pouring process thereof and 'misrun' or vacuum 'cave' is caused in a filling cavity. The glue pouring electronic token is coordinated by a first case one end of which is provided with a glue pouring port and a second case adaptive to the first case, a circuit board is arranged between the two cases, the first case is also provided with at least one air exhaust, the inner wall of the first case is provided with a guide clapboard used for dividing the first case into two independent spaces, and the guide clapboard arranged between the air exhaust and the glue pouring port causes glue solution to unidrectionally and annularly flow in an enclosed case. The glue pouring process comprises the following steps: firstly, splicing a liquid crystal display at a corresponding position of the first case with UV (ultraviolet) glue and curing, and assembling the two cases; secondly, pouring glue into the case by virtue of the glue pouring port; and thirdly, standing and curing at normal temperature and under normal pressure. The method provided by the invention is applicable to glue pouring of an electrical appliance with complex structure and shape or a miniaturized electrical appliance.

The invention discloses a dry-type composite-dielectric filter capacitor, which comprises a capacitor core, a pin, and an encapsulation layer coated outside the capacitor core, wherein the capacitor core consists of a polypropylene film plated with a metallic layer and a metallized polyester film which are superposed in turn and are coiled in a non-inductive mode, the metallic layer is a zinc-aluminum composite layer, the metallized film has a 'natural repair' characteristic, small loss and large capacitance, the encapsulation layer is an epoxy resin solidified layer, thus not only the insulation strength of the capacitor is ensured, but also the safe use of the capacitor under a severe condition is ensured.

In this switching device, a field relaxation electrode is provided on the movable contact of a disconnector so that the movable contact can be connected to a fixed contact by changing the position of the field relaxation electrode between an open state and a closed state. By providing the field relaxation electrode on the movable contact of the disconnector, the ground dielectric strength and interpolar dielectric strength in the open state position can be improved to reduce the size and cost of the equipment. By improving the charging current interrupting performance and exciting current interrupting performance, the applicable range on system of the equipment can be extended.

The invention discloses an insulation treatment method for a superconducting magnet wire-outlet tail end of a Y-shaped tail end structure. According to the special shape of the wire outlet tail end, an insulation lap is wound around the wire outlet tail end in a wrapping mode for insulation treatment. A feasible solution is provided for size uniformity and full wrapping of an insulation material on the surface of a conductor which is of a Y-shaped geometric structure and is arranged on a coil. The insulation treatment method is simple in structure, and the requirements for insulation strengthand the size can be met.

The invention discloses an automatic cable processing system and method, and belongs to the technical field of power transmission cables. The system and the method are used for realizing information interaction among processing modules through a master control computer so as to realize full-automatic cable processing, including stripping, welding and gluing of a single-core wire in a cable. The beneficial effects of the invention are as follows: automatic processing of the whole flow of a cable is realized; stripping, welding and gluing of a single-core wire in a cable are realized; and a wirecore can be automatically distinguished, and distinguishing errors caused by subjective reasons are avoided.

In the invention, a high voltage end grading ring component, a high voltage arm unit, a low voltage end grading ring component, a low voltage arm unit and a pedestal are included. The low voltage armunit is arranged on the pedestal. A first insulation hollow casing pipe and a second insulation inner pipe are included. The second insulation inner pipe is arranged in the first insulation hollow casing pipe. The high voltage arm unit is arranged in the second insulation inner pipe. The pedestal is connected to the first insulation hollow casing pipe. The low voltage end grading ring component isarranged on one end of the first insulation hollow casing pipe. The high voltage end grading ring component comprises a first support, two grading ring groups fixed to the first support and a high voltage end terminal. The first support is arranged on the other end of the first insulation hollow casing pipe. The grading ring groups form a spherical or ellipsoidal envelope structure. The two endsof the high voltage arm unit are connected to the high voltage end terminal and the other end of the low voltage arm unit. In the invention, a field intensity near a high voltage end is uniformly distributed and local electric field intensity is reduced.

The invention provides a calibration system and method of an on-line monitoring device for dissolved gas in transformer oil. The system comprises an oil-taking main tube and an oil-discharging main tube; the oil-taking main tube is provided with a transformer oil-taking branched tube and a monitoring device oil-taking branched tube, and the two branched tubes are provided with a transformer oil taking branched tube control valve and a monitoring device oil taking branched tube control valve; the oil-discharging main tube is provided with a transformer oil-discharging branched tube and a monitoring device oil-discharging branched tube, and the two branched tubes are provided with a transformer oil-discharging branched tube control valve and a monitoring device oil-discharging branched tube control valve; the oil-taking main tube is provided with an oil tank and an oil-taking main tube control valve, an oil-discharging main tube control valve is arranged on the oil-taking main tube, a calibration oil tube is arranged between the oil-taking main tube and the oil-discharging main tube, and the calibration oil tube is provided with an oil calibrating tank and divided oil calibrating control valves. The method comprises the following steps: S1: storage of old oil; S2: opening of the calibration oil tube; S3: calibration; S4: flushing of the on-line monitoring device; S5: oil return of the transformer; S6: finishing. The system and method have the advantages of improved monitoring accuracy, and guarantee of equipment security and dielectric strength.

A high-temperature anti-jamming space charge measuring device and method are provided; the device is composed of a pulse coupling circuit unit, an electrode test unit, and an acoustic pulse sensor unit; the electrode test unit heats a sample to different temperatures through high-temperature oil bath; the pulse coupling circuit unit isolates the heating effect of the electrode test unit through normal-temperature oil batch circulation; the acoustic pulse sensor unit is made of polyvinylidene fluoride-trifluoroethylene or lithium niobate crystal material. The method comprises the steps of 1) selecting a test required sensor material as test temperature requires; 2) placing a sample in the measuring device; 3) adjusting a normal-temperature and heating oil bath circulation system; 4) setting the temperature of the heating oil bath circulation system, and running space charge test when the temperature sensor reaches a set value and stabilizes. The high-temperature anti-jamming space charge measuring device and method have the advantages that the heating effect of the electrode test unit upon the pulse coupling circuit unit can be eliminated effectively, shielding effect is good, and space charge can be accurately measured under high temperature and high field strength.

Immersion type evaporative cooling mode is adopted in transformer. Evaporative- cooling medium is injected to oil tank. Being generated by energy consumption, heating of windings and magnet core of transformer, quantity of heat is transferred to the evaporative-cooling medium in the oil tank. Thus, temperature of the medium is raised. When the temperature reaches to saturation temperature corresponding to inner pressure, the evaporative-cooling medium in the oil tank is vaporized, so that circulation is formed: vaporized medium generates phase change to absorb heat, and condenser cools vaporized medium to change it back to liquid. Comparing with transformer, the oil immersion type transformer removes out oil conservator to make structure simple; possesses high current density to reduce material needed. Advantages are: non-flammable, low temperature rise, safe and reliable, light and miniaturization.

The invention relates to an unthreaded terminal mechanical explosion-proof dry type capacitor, which comprises a terminal component, a cover component, an explosion-proof sheet, copper foil, an insulation sleeve, a core component, discharging resistors, a bottom sleeve, a shell and insulation paper, wherein the insulation sleeve is sleeved outside the copper foil; one end of the copper foil is welded on the core, while the other end is connected with the cover plate by spot welding through the explosion-proof sheet; the insulation paper is arranged in the shell; the discharging resistors are welded on the two end faces of the core; the core is arranged in the shell; the bottom of the core is sleeved with the bottom sleeve; and dry epoxy is filled in the shell, the end face of the core is sealed, the bottom sleeve is fixed, the cover component is closed and sealed, and the terminal component is pressed in. Compared with the prior art, the capacitor has the advantages that: due to a dry structure, the oil leakage drawback of an oil type capacitor is solved, and the product performance is improved; the explosion-proof safety of the dry type explosion-proof capacitor is improved; the central positioning of the core of the capacitor by the bottom sleeve is enhanced and the insulation strength of the shell is ensured; and the capacitor can be used by simply inserting a wire, and the use is convenient, safe and reliable.

The invention relates to para-aramid fiber and mica composite paper and a production method thereof. The paper is prepared from 10%-20% of para-aramid chopped fiber, 20%-40% of para-aramid fibrid and 40%-70% of mica plates. The production method comprises the following steps: preparing mica plate pulp with mass concentration of 1%-6%, para-aramid chopped fiber pulp with mass concentration of 0.01%-0.05% and para-aramid fibrid pulp with mass concentration of 0.05%-0.5%, uniformly mixing and dispersing the pulp, shaping by wet papermaking, drying, and then hot-pressing to obtain the para-aramid fiber and mica composite paper. The composite paper is low in quantity, small in porosity and excellent in mechanical strength, the high temperature stability of the composite paper is remarkably improved while the mechanical strength and dielectric strength of the mica composite paper are guaranteed, and the preparation steps are simple.

The invention discloses a low-temperature current transformer coil. The low-temperature current transformer coil mainly comprises a low-temperature glue inner frame (1), a low-temperature insulated wire turn (2) and a low-temperature glue outer frame (3), wherein the low-temperature glue inner frame (1) is arranged in the center of the low-temperature current transformer coil, and adopts a hollow ring-shaped structure; the low-temperature insulated wire turn (2) is formed by uniform winding in the radial direction of the low-temperature glue inner frame (1) of low temperature resistant insulation varnished wire; the head and tail lead wires (23) of the low-temperature insulated wire turn (2) are clung to the outer wall of the low-temperature glue inner frame (1), and are led out from a wire return groove (12) in the outer wall of the low-temperature glue inner frame (1); the low-temperature glue outer frame (3) is ring-shaped, and wraps the low-temperature insulated wire turn (2) and the low-temperature glue inner frame (1) except the lead wires (23).

The invention relates to a ring-opening silicon substrate pressure sensor thick film circuit, which belongs to the technical field of pressure sensors and is characterized by comprising a ceramic substrate, wherein the ceramic substrate is provided with a plurality of compensation plates in an array mode; the compensation plates are connected with each other; each compensation plate is provided with a pilot hole; the periphery of the pilot hole is provided with probe pinholes; and the compensation plate is printed or laser-etched with a circuit. In the invention, the ceramic substrate replaces PCB plate grids, thereby enabling the calibration accuracy of the sensor to be improved, widening the compensation temperature area, comprehensively improving the reliability, shock resistance, high-low temperature impact resistance and exterior quality of the sensor, and more importantly providing process guarantee for manufacturing pressure sensors in scale.

An outdoor 2 multiply 27.5 kV solid-sealing vacuum modular device of electrified railway includes brackets, two connection branches mounted on the brackets that are parallel and independent to each other and an integrated automation control box, a bipolar solid-sealing disjunctor is mounted onto middle part of the brackets, an outgoing line connection terminal is located on a first solid-sealing strut type transformer, moving contact of a first bipolar disconnector is located on bracket of the first solid-sealing strut type transformer, between the first bipolar disconnector and the disjunctor is provided with current transformer, stationary contact of the first bipolar disconnector is located on the current transformer which is connected with a single polar solid-sealing disjunctor; an incoming line connection terminal is located on a second solid-sealing strut type transformer, moving contact of a second bipolar disconnector is located on the second solid-sealing strut type transformer, stationary contact of the second bipolar disconnector is located on a solie-sealing polar of the disjunctor. The invention can reduce floor space efficiently and capitalized cost, and has good reliability and good prosucts reliability, which is convenient to maintain.

A 26/35kV or 27.5kV silicon rubber cold contraction type through joint comprises an insulation layer. An outer shielding layer is arranged on an outer surface of the insulation layer, a balance pipe is composited on a middle inner wall of the insulation layer, a stress cone is arranged on inner walls at two ends of the insulation layer respectively, two ends of the balance pipe are provided with a two-cone structure respectively, each two-cone structure comprises an inner cone expanding outwards and an outer cone, and the inner cone and the outer cone are connected transitionally through a section of circular pipe with the diameter larger than the inner diameter of the balance pipe. The structure of the balance pipe is modified to optimize electric field distribution, so that electric field concentration at the ends and tangential positions along an interface of the balance pipe is avoided, electric field intensity is effectively reduced, electric field is balanced, a semi-conducting layer in a cable is rationally and effectively restored, electrical performance of the through joint is improved, accident rate is lowered, and stable operation of an electrical system is guaranteed in the long term.

The embodiments of the invention provide a switching power supply, an electrical isolation method and a multi-meter concentrated reading communication device. The switching power supply comprises a control circuit and a transformer; an external power supply is coupled with a primary coil of the transformer, the primary coil of the transformer is coupled with the control circuit, the transformer has a plurality of secondary coils, and each secondary coil of the transformer is coupled with the primary coil of the transformer; and each secondary coil of the transformer is coupled with an external load. The transformer is used for adjusting the input voltage of the external power supply into multiple voltage signals via the electromagnetic effect of the primary coil and the plurality of secondary coils thereof, and outputting each voltage signal to the load, so as to electrically isolate the external power supply from the loads. 4KV electrical isolation between the external power supply and the loads is realized by the electrical isolation between the primary coil and the plurality of secondary coils of the transformer. 4KV electrical isolation between the loads is realized by the electrical isolation between the secondary coils of the transformer.

The invention relates to a switching power supply, an electrical isolation method and an ammeter. The switching power supply comprises a first transformer and a second transformer, wherein an external power supply is coupled to a primary coil of the first transformer, a secondary coil of the first transformer is coupled to a primary coil of the second transformer, a secondary coil of the second transformer is coupled to a load, the first transformer is used for adjusting an input voltage of the external power supply to a first voltage signal by an electromagnetic effect of the primary coil and the secondary coil of the first transformer and inputting the first voltage signal to the primary coil of the second transformer so that the external power supply is electrically isolated with the second transformer, and the second transformer is used for adjusting the first voltage signal to a second voltage signal by an electromagnetic effect of the primary coil and the secondary coil of the second transformer and outputting the second voltage signal to the load so that the first transformer is electrically isolated with the load. By series connection of the first transformer and the second transformer, the electrical isolation of 10KV between the external power supply and the load is achieved.

The invention discloses a disconnector dynamic discharging process simulation device as well as a test device and method thereof. The disconnector dynamic discharging process simulation device comprises a moving sphere gap arm, an adjusting sphere gap arm and an electrical cabinet, wherein both the moving sphere gap arm and the adjusting sphere gap arm comprise connection bases, guide rail bases,guide rails, slide blocks, clamping bases, connecting rods and discharging spheres; the moving sphere gap arm further comprises a cylinder; the connecting rod of the moving sphere gap arm is connectedwith a cylinder shaft; the adjusting sphere gap arm further comprises a locking mechanism; the locking mechanism is used for fixing the slide block of the adjusting sphere gap arm to the guide rail of the adjusting sphere gap arm; and a pneumatic control circuit is arranged in the electrical cabinet. Through adoption of the disconnector dynamic discharging process simulation device, the practicalswitch-off/on discharging processes of a disconnector can be simulated, and the difference from the practical working condition of the disconnector is relatively small.

The dry-type high-frequency high-voltage transformer structure (1) of the present invention is characterized by comprising an EE-type magnetic core (2), a square skeleton (3), a square coil (4) and afixed support device (6) and further comprising a lead-out copper bar or copper wire (7) of the coil, wherein the EE magnetic core (2) is formed by installing two E-type magnetic cores (21) in such away that the openings of the two E-type magnetic cores are opposite to each other and the two E-type magnetic cores are aligned in the vertical direction; the square skeleton (3) sleeves the central pillar of the EE-type magnetic core (2); the square coil (4) is a vertical structure and is formed by winding a combination of a low-voltage coil (41) and a high-voltage coil (42) around the square skeleton (3); and the high-voltage coil ( 42) and the low-voltage coils are alternately wound around the square skeleton (3). The dry-type high-frequency high-voltage transformer structure solves the performance defects of low transmission capacity, low step-up voltage, low efficiency, incapability of long-term operation and low reliability in the current high-frequency and high-voltage fields such that a high-frequency and high-voltage power supply can be used widely and reliably.

The invention relates to the technical field of impulse voltage generators, in particular to a multilayer small-size mutually inverse type non-inductive resistor. The multilayer small-size mutually inverse type non-inductive resistor comprises a resistance insulating barrel and resistance wires, an inductance adjusting area is arranged at the end of the resistance insulating barrel, resistance wire winding grooves and resistance transposition grooves are formed in the resistance insulating barrel, and the resistance wires are wound in the resistance wire winding grooves and the resistance transposition grooves in a matched mode. The multilayer small-size mutually inverse type non-inductive resistor is mainly applied in a closed compact type impacting device, is surrounded by gas with high insulating property, and therefore the space between resistance grooves can be quite small. The resistor adopts a multilayer winding structure, the space of the insulating barrel is utilized fully, and the overall length of the resistor is reduced, insulating rings are mounted between two layers of resistance wires, and the insulating intensity of each layer is guaranteed. The number of the resistance grooves for winding the resistor is an even number, the winding direction of each layer of resistor is opposite, the winding directions of adjacent resistance discs are opposite, certain adjusting grooves are reserved, and inductance generated in resistor winding process is adjusted to make residual inductance to be reduced to the minimum.

The invention discloses an air-cooled bolt type diode aging device, which comprises an upper layer and a lower layer. A first aging power source, a second aging power source and a fan power source arearranged on the lower layer. The upper layer includes an a surface and a b surface that are perpendicular to an aging zone of a platform. A plurality of independent aging stations are embedded into each of the a surface and the b surface; and the first aging power source and the second aging power source are respectively connected to the aging stations of the a surface and the b surface. With a series aging mode, aging is performed on bolt type diodes at the aging stations; and the fan power source is connected to the aging stations. The air-cooled bolt type diode aging device has advantagesof environmental protection, high safety, elimination of the unsafe factor of the water cooling mode, simple operation, high maintainability, low manufacturing cost, and high expandability; the mass production is realized; the production efficiency is high; and after specific testing verification, the aging test requirement of the bolt type heavy-current diode is met completely.