Composite insulators are composed of three parts: insulating core rod, silicone rod rubber sheath and connecting fittings at both ends. Insulating mandrel is the abbreviation of epoxy resin fiberglass lead rod, it is the skeleton of composite insulator, it plays multiple functions such as supporting umbrella cover, inner insulation, connecting hardware at both ends, and bearing mechanical load, etc.
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SpecificationsRated voltage kVCustomized mechanical tensile load KNconnection markStructure height H (mm)Minimum arc distance h (mm)Minimum nominal creepage distance h (mm)Lightning full-wave impulse withstand voltage (peak kV not less thanThe operating impulse withstand voltage (peak value) kV is not less thanPower frequency wet withstand voltage 1minkv (effective value) kV is not less thanFXBW4-10/40104011W340±1519040095-60FXBW4-10/70107016W360±1519049095-60FXBW4-10/1001010016W400±1519049095-60FXBW4-20/40204016W450±15280600170-75FXBW4-20/70207016W470±15280750170-75FXBW4-20/1002010016W500±152
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Composite sheathed metal zinc oxide arresterThe core working element of the product is made of multi-element metal oxide powder mainly composed of zinc oxide, which has excellent nonlinear volt ampere characteristics, fast steep wave response and large flow capacity. Products with gap adopt self blowing gap and pressure equalizing radiation structure, which reduces the dispersion of discharge and has small impact coefficient.The adoption of composite insulating jacket conforms to the development trend of miniaturization, security and maintenance free of international electric power products.
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Our 110kV and 220kV composite jacket line arresters have passed the type test of the National Insulator Arrester Testing Center and have performed well.Our company has adopted a unique design of core rod through ring resistor, directly crimping end fittings and reliable sealing process to make it have the tensile strength of suspension composite insulator. (Patent No.: 2007200155561.4).
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Reference standardsGB11032-2000 AC gapless metal oxide arresterJB/T8952-2005 Metal Oxide Surge Arrester with Composite Jacket for AC SystemJB/T10497-2005 Metal Oxide Surge Arresters with Series Gap and Composite Jacket for AC Transmission LinesGB311.11-1997 Insulation Coordination of High Voltage Transmission and Transformation EquipmentJB/T8459-2006 Preparation Method of Arrester Product Model□ Structural characteristics1.
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The role of drop-out fuses10kV equipment can be installed on the high-voltage side of the transformer on the pole, where the transformer and capacitor are connected to the line. The drop-out fuse can effectively protect the circuit from overload and short-circuit. At the same time, it can also be installed at the end of a long line or on a branch line, which can provide extended protection for areas that cannot be protected by relays.
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Suspension tempered glass insulator products are used for insulating and suspending wires in high-voltage and ultra-high-voltage AC and DC transmission lines.Type of insulator acc. RussianstandardUltimateMechanical Strength of insulators, KN, not lessDiameter of glass shed (D), mmSpacing, mmCreepagedistance, mmWeight, kgVoltage withstand, kV, not lessImpulseFrequency50 Hz, wetRadio interference levelU40BSU40BL401751001101851,7703025
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Features of arrester with series gap □ Product model description1. Under normal conditions, the series gap of the arrester isolates the arrester from the system, and the arrester does not participate in the operation, thus prolonging its service life;2. For the system with frequent voltage fluctuation, the gap can be broken down to make the arrester work only when the voltage exceeds the specified value, avoiding the frequent action of the gapless arrester;3.
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The main component of the metal oxide arrester's nonlinear resistance valve is zinc oxide, which has excellent nonlinear characteristics. Under normal operating voltage, the resistance value is very high, which is actually equivalent to an insulator. Under over-voltage, the resistance of the resistor is very small, and the residual voltage is very low. However, under normal operating voltage, the valve plate will deteriorate due to long-term power frequency voltage, which will cause changes in resistance characteristics and increase the leakage current flowing through the valve plate.
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□ Technical standards The standard for product production is GB11032-2000 (eqvIE60099-4.1991) "AC gapless metal oxide arrester", JB/8952-20045 "composite metallization arrester for AC system with no gap in the jacket"□ Product model description □ Conditions of useYH |---- Composite jacket metal oxide arrester (HY is the old model) | Y is metal oxide surge arrester with porcelain jacket5 |---- Nominal discharge current KaW |---- Structural features W: No gap C: Series gap R: Parallel gapS |---- place of use S: Power distribution Z: Power
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Three phase combined zinc oxide arrester with composite sheath is a new type of protective appliance used to protect the insulation of power equipment from over-voltage hazards. It effectively limits the over-voltage between phases while limiting the over-voltage between phases and ground. It is widely used to protect vacuum switches, rotating motors, parallel compensation capacitors, power plants, substations, etc. This kind of combined arrester has been used for more than ten years, and the practice has proved that it is a practical and effective measure to limit the interphase overvoltage.
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(H) GW13 type neutral point disconnector is used for three-phase AC 50Hz outdoor high-voltage electrical equipment, which is used for opening and closing the neutral point connection of transformer without load. When the knife switch is in the normal opening position, an insulation distance meeting the safety requirements can be provided.□ Structure1. Single pole V-shaped double post rotary structure, with small floor area, mainly consists of base, post insulator, conductive circuit, operating mechanism, etc.2.
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HJDW6 outdoor low-voltage knife switch is a single-phase AC 50HZ low-voltage switchgear, which is used in the power system with rated voltage of 0.5KV to connect or isolate the power supply when there is voltage and no load. The knife switch is operated with insulated hook bar The knife switch is a single-phase structure, and each phase is composed of a word mounting plate, a pillar insulator, a knife switch, a contact, etc. The upper end of the knife switch is provided with a fixed pull ring for opening and closing the insulating hook bar□ Operating environmenta.
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wire galloping has brought immeasurable economic losses and social impacts to our country. The composite interphase spacer is a kind of line that can effectively prevent the galloping of line conductors to keep the line safe, and effectively reduce the space of the transmission corridor. It is listed as a compact high-voltage transmission line 2220kV and below in the guidelines for galloping prevention and control of the State Grid Corporation of China.
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Glass Pin Insulator is extremely convenient for transportation and installation; it adopts non-breakthrough type design, no need to measure zero value during operation; reliable structure, no damage to the core bar, and can give full play to its mechanical strength.
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Capacitive HY5WR surge arrester is used in 6KV lines to prevent overvoltage generated by vacuum switch and oil-less switch operation capacitor bank, protect capacitor bank from overvoltage damage and absorb overvoltage energy.Advantages of H05WR-10/27 capacitive mine injectorHY5WR-10/27 Capacitor Harm Avoidance Device has good volt-ampere characteristics, excellent protection performance and impact response characteristics, high tolerance to multiple lightning and overvoltage performance, good pollution resistance and other advantages, and the structure Simple, HY5WR-10/27 capacitive arrester
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All of the Cable Trailers described below are equipped with braking and road lighting systems to conform to the relevant European type approval specifications and are designed to travel fully laden at road speeds indicated on all European highways. Our full range of highway cable drum trailers and trailer mounted winches can now be used within all European countries without the need for additional individual country inspectionsand approval.For safe and easy drum handling, all SEB Cable Drum Trailers are fitted with hydraulic hand pump operated Iift/lower systems as standard.
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The uncooled infrared focal plane thermal camera core assembly is adopted, which has the characteristics of small volume, light weight, long action distance and easy operation. The product can be used day and night, and has the ability to penetrate smoke and fog. It can "see" the target through the jungle and some shelters. The product is suitable for aiming, observation and search.
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Advanced stirling cooler for cooled infrared detectors.Made in China. Made in China. Details please see the picture. Made in China. Details please see the picture. Advanced stirling cooler for cooled infrared detectors.Details please see the picture. Made in China. Advanced stirling cooler for cooled infrared detectors.
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Low illumination CMOS is a new type of digital solid-state low light level imaging device. It has the characteristics of low illumination and high sensitivity. It can image clearly at low illumination (< 10-2lux).According to customer requirements, the development of helmet mounted low illumination CMOS camera and small batch trial production have been completed. Helmet mounted low illumination CMOS camera has the function of non direct viewing video, which is mainly used in the fields of investigation, counter-terrorism, communication and so on.
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LXQ (LXQ3, LXQ4) type nonlinear resistance harmonic eliminator (harmonic eliminator for short) for neutral point of voltage transformer is installed in primary winding (or secondary winding) Y of 6~35kV voltage transformer (PT for short). A nonlinear resistance harmonic damping device between the neutral point of the junction line and the ground. Compared with the traditional RXQ type harmonic eliminator, the LXQ type harmonic eliminator has been greatly improved in design to improve the thermal capacity of the harmonic eliminator. The harmonic eliminator has superior electrical performance.
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Most advanced stirling cooler in the world. Very powerful cooling ability.
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The day and night gun sight can realize all-weather close-range accurate shooting in the daytime, night and low illumination environment, and can solve the rapid aiming and accurate shooting at night from 25m to 100m.and can solve the rapid aiming and accurate shooting at night from 25m to 100m.night and low illumination environment, The day and night gun sight can realize all-weather close-range accurate shooting in the daytime,
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