61 results about "Solid insulator" patented technology

The object of the invention is to provide an extra-fine copper alloy wire, an extra-fine copper alloy twisted wire, an extra-fine insulated wire, a coaxial cable having high intensity, low resistance and high heat tolerance, their manufacturing method and a multicore cable thereof. The extra-fine copper alloy wire has 1 to 3 weight % of silver in the copper, a wire diameter less than 0.025 mm, and a tensile strength of more than 850 MPa, an electrical conductivity of more than 85% IACS after heat treatment; the coaxial cable (20A) is configured that, an inner conductor is formed by an extra-fine copper alloy twisted wire (3) twisted from seven extra-fine copper alloy wires (1), the inner conductor is then peripherally envelopped with a solid insulator (5a) to form an extra-fine insulated wire (10), a plurality of conductor wires (13) are winding in a screw shape on the periphery of the extra-fine insulated wire along a length direction of the extra-fine insulated wire to form an outer conductor (15), thereafter, the outer conductor is envenlopped with a protection layer (17).

An insulating and securable object holder comprising a solid insulator for holding the object coupled with a flexible material that extends downwardly past the rubber insulator protruding radially to form a flexible skirt. The holder protects, insulates, and secures differently-sized objects to smooth and semi-smooth non-porous surfaces by a vacuum created when the holder is firmly pressed down onto a non-porous surface.

Disclosed herein is a method that relates to determining water content of a solid insulation at a specific location within a transformer. The method comprising, determining a temperature of the solid insulation at a specific location, calculating a relative moisture saturation of the oil at the specific location, calculating the ultimate water content in the solid insulation at the specific location, and calculating an actual water content in the solid insulation at the specific location.

A container for holding and delivering liquids is disclosed. A method of making the same is disclosed. The container can have a molded container top, a molded container bottom, a flexible film reservoir, and a handle extending from the container top to the container bottom. The reservoir can be laterally exposed around the entire circumference of the reservoir along a part of the longitudinal length of the reservoir. A thermally insulated reservoir system is disclosed. The reservoir system can have a bag having a multi-layered bag wall. The bag wall can have a first layer sealed to a second layer. The volume defined between the first layer and the second layer can be partially or completely filled with a fluid insulator, such as air or saline solution. The volume defined between the first layer and the second layer can also or alternately be partially or completely filled with a solid insulator, such as a matted fiber layer.

An electromagnetic device comprises a magnetic field generating electrical circuit including a winding (1) having at least one electrical conductor (2). The winding comprises a solid insulation (4) surrounded by outer and inner layers (3, 5) serving for equalization of potential and having semiconducting properties. Said at least one electrical conductor (2) is arranged interiorly of the inner semiconducting layer (3). The invention also relates to methods for electric field control and production of a magnetic circuit as well as use of a cable for obtaining a winding.

A switchgear case is partitioned into a high voltage bus bar chamber, which contains bus bars and cable heads, a high voltage device chamber containing circuit breakers and operation mechanisms and a low voltage control chamber containing a relay and measurement devices, etc., A rear wall of the case has a first suction port disposed at a lower part thereof, wherein the high voltage bus bar chamber, high voltage device chamber and the low voltage control chamber are communicated and air passing through the chambers is discharged from a first discharging port of the casing. The bus bars electrically connecting the high voltage devices in the high voltage device chamber and connecting bars connecting the adjoining bus bars and the cable heads are covered with solid insulators for solid-insulation.

A switchgear includes an earthing and disconnecting switch which linearly moves and is switchable to a disconnecting and an earthing positions, a vacuum valve which performs closing and breaking of a current in a vacuum container producing vacuum inside, and a solid insulator with which the earthing and disconnecting switch and the vacuum valve are covered, therein the earthing and disconnecting switch and the vacuum valve are electrically connected, and closing and breaking of a current is performed in the vacuum valve.

An electrical connector comprises a high voltage pad and a high voltage plate. When connected to another electrical connector, the two plates, which are at the same voltage as the pads, form a region of high voltage in which the field is low. The pads are positioned in that region. An electrostatic clamp of an EUV lithographic apparatus may have such a pad and plate, for connecting to the electrical connector. By placing the interconnection in a low field region, triple points (points of contact between a conductor, a solid insulator and a gas) may be present in that region.

The invention discloses a method for solving the solid-insulator electrical aging life. The method includes the steps of S1, assuming that the solid-insulator electrical aging life obeys the inverse power rules (1) and (2) (please see the specification); S2, carrying out a solid-insulator acceleration electrical aging test with a step-by-step boosting method, wherein as for different voltages Uk and voltage keeping times Tk, the value of the following equation (3) (please see the specification) keeps unchanged; when the material accelerated life test is carried out with the step-by-step boosting method, the Tks in the equation (3) are the same and are assumed to be T0s, and the equation (3) becomes the equation (4) (please the specification); when the test is carried out, the multiple different T0s are selected for testing, and testing of multiple samples is carried out under each T0; multiple sets of known T0s, multiple sets of known Tms, multiple sets of Uks and multiple sets of Ums are obtained after the test is completed; S3, processing the test data with the maximum likelihood method; S4, calculating the insulation life L of a solid insulator under E according to the equation (1) or the equation (2). The method is simple, convenient and rapid, and the physical sense and the mathematical sense are visual.

The invention discloses a contact double-shielding structure. The contact double-shielding structure comprises a first fixed contact, a first shielding net, a second shielding net, a second fixed contact, a solid insulator and a grounding conductive coating, the first shielding net and the second shielding net are arranged in the solid insulator at an interval, a cavity is arranged in the solid insulator, the first fixed contact and the second contact are arranged in the cavity at an interval, the first fixed contact is electrically connected with the first shielding net by a coupling screw, the second fixed contact is electrically connected with the second shielding net through a coupling screw, and the grounding conductive coating is arranged on the periphery of the solid insulator. The shielding nets are connected with the fixed contact units by the aid of the screws, and a movable contact unit is positioned in the two fixed contact units and plays a role in electric connection. By the aid of the double-shielding structure, internal fault problems caused by low insulating strength of insulating gas can be decreased greatly.

The invention discloses a method for preparing an insulator. The method comprises the following steps of: a, preparing a three-dimensional framework which has a shape matched with that of the insulator by using a glass fiber bundle, wherein glass fiber cloth is coated on the surface of the framework and is soaked with epoxy resin; b, when the epoxy resin starts to solidify, uniformly coating resin containing ceramic powder or glass powder on the surface of the framework, and putting the framework into an insulator mold; and d, raising the temperature, sizing, solidifying and then demoulding to obtain the insulator. According to the integrated insulator prepared by the method, a process of sleeving umbrella skirts on core rods of the insulator sequentially one by one is eliminated, and labor power is saved; and the insulator prepared by the process has low dead weight, a high electrical property and a high mechanical property. Both a hollow insulator and a solid insulator which are prepared by the process have a high electrical property, a high mechanical property and low dead weight. The insulator is suitable for outdoor high-voltage power transmission lines.

An igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an auxiliary electrode is provided, which is embedded in and covered by a solid insulator. During initial phases of operation, no part of the plasma generated contacts the auxiliary electrode. However, eventually, the covering insulation is eroded by the plasma, and the auxiliary electrode becomes exposed and available as a return path for the plasma. The igniter is constructed so that, when this erosion occurs, the lifetime of the igniter is near its end. Detection of this erosion, as by detecting the new current in the auxiliary ground electrode, indicates the approaching end-of-lifetime.

The invention discloses a solid insulation switch cabinet with an insulation bus system and a vacuum circuit breaker handcart. High-voltage live parts of a controller, the vacuum circuit breaker handcart, a voltage transformer, the insulation bus system, an insulation cable inlet and outlet system, and an isolation switch or a grounding switch are all provided with solid insulators used for realizing mutual insulation between phases and between the phases and a grounding system. Problems of low safety and reliability and large occupied area of armored mobile vacuum solid insulation switch cabinet equipment in the prior art are solved. According to the solid insulation switch cabinet, high-voltage live terminals of components such as the vacuum circuit breaker handcart, the isolation switch, the grounding switch, the cable inlet and outlet system, the insulation bus system, and the voltage transformer are all surrounded by insulation materials, the phases and the grounding system are mutually insulated from each other, functions of conduction, isolation, grounding protection, metering, load short circuit protection, and electric appliance connection between cabinets are realized, and the requirement of the power supply and distribution system for users is met.

The invention discloses a rod-shaped epoxy glass fiber core porcelain composite insulator for electrified railway catenaries. The rod-shaped epoxy glass fiber core porcelain composite insulator for electrified railway catenaries comprises an insulator body, an upper metal cap and a lower metal cap, wherein the insulator body comprises an insulator body core, an insulator body jacket and a silicone rubber umbrella skirt; the insulator body jacket is made of a porcelain material; the insulator body core is arranged in the insulator body jacket; the insulator body core and the insulator body jacket are connected through insulating paste to form the solid insulator body; the silicone rubber umbrella skirt is arranged on the outer surface of the insulator body jacket through a hot pressing or injection manner. Therefore, the rod-shaped epoxy glass fiber core porcelain composite insulator for electrified railway catenaries has the advantages of being lighter in weight, more convenient to carry and install and safer to use.

The invention discloses an insulator umbrella skirt, insulators comprising the umbrella skirt as well as manufacturing methods for the insulator umbrella skirt and the insulators. The insulator umbrella skirt is a hollow glass-reinforced-plastic umbrella skirt which is manufactured by soaking three-dimensional glass fibre fabric in epoxy resin. The manufacturing method for the insulator umbrella skirt comprises the following steps of: a. making the three-dimensional glass fibre fabric into an annular sheet and then soaking the annular sheet in the epoxy resin; b. uniformly smearing resin containing ceramic powder on the surface of the annular sheet when solidification begins, later placing the annular sheet in an umbrella skirt die; and c. increasing temperature for shaping and then stripping the die after solidification, thereby manufacturing the hollow glass-reinforced-plastic umbrella skirt. The invention also discloses a hollow insulator and a solid insulator which comprise the insulator umbrella skirt, as well as manufacturing methods for the hollow insulator and the solid insulator. The insulators and the insulator umbrella skirt are suitable to being used in high-voltage circuits.

The invention provides a voltage generating device and a withstanding voltage test device of a gas insulation totally-enclosed combination electric appliance. The voltage generating device comprises an operation impact voltage generator, a DC voltage generator, a blocking DC capacitor, a blocking AC resistor and a filtering capacitor, wherein a first end of the blocking DC capacitor is connected with a first output end of the operation impact voltage generator, a first end of the filtering capacitor is connected with a first output end of the DC voltage generator and a first end of the blocking AC resistor, a second end of the blocking AC resistor is connected with a second end of the blocking DC capacitor to form a voltage output end, and a second output end of the DC voltage generator and a second output end of the operation impact voltage generator are in connection with ground potential. The voltage generating device is advantaged in that superposition of a DC voltage and an operation impact voltage is realized, the voltage generating device can be applied to withstanding voltage tests of a GIS, and the voltage generating device has important meaning for rule study on influence of developing a DC electric field on insulation characteristics of an internal solid insulator of GIS equipment.

The distillation unit includes at least one cryogenic distilling column and at least one heat exchanger, arranged in a chamber with a double casing in which the intermediate partition contains a solid insulator. The unit can be on board offshore floating terminals and drilling platforms.