Electrified railway is a railway with electric locomotive as the basic traction force. It is composed of electric locomotive and electric power supply system.The power supply of the electrified railway is from the national grid. The high-voltage alternating current from the State Grid is sent to the railway traction substation for the first time of voltage reduction, and then sent to the overhead contact system.
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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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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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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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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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(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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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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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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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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Infrared thermal imaging all-weather forest fire prevention monitoring and early warning system is a high-tech product based on forest fire monitoring, applying international advanced infrared thermal imaging technology, combined with wireless transmission and network remote control functions, and comprehensively applying GIS technology, infrared fog penetration technology, digital image processing technology and other high-tech technologies to forest fire early warning management.Infrared thermal imaging technology is a new stage in the development of night vision technology.
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For border and coastal defense monitoring and important places, long-distance and ultra long-distance observation equipment is essential. Long focus and multi field of view infrared thermal imager products can well meet the needs of long-distance observation at night. The infrared optical system designed with long focus and multi field of view can not only meet the needs of target search, but also meet the needs of further observation.
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CMOS gun sight has the characteristics of all-weather operation, no night lighting, strong concealment, high reliability, long service life and low power consumption. It is suitable for observation and aiming in day and night, night or low illumination environment. high reliability, long service life and low power consumption.
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High performance multi-functional low light level night vision instrument is an optical and electronic instrument which can observe the external scenery with the help of weak natural light (such as moonlight, starlight or atmospheric glow) when there is no lighting at night. It is a passive night vision instrument with good concealment.
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Very popular MW cooled detector in the world market. Can work with C308, C330 or C363 stirling cooler.
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Specialized detector for users. Can work with C308, C330 or C363 stirling cooler. Very good reliability. Very good reliability. Can work with C308, C330 or C363 stirling cooler.Specialized detector for users. Can work with C308, C330 or C363 stirling cooler.Specialized detector for users. Very good reliability.
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Very good delivery time. Lowest price in the world. Can work with C308, C330 or C363 stirling cooler. Very good reliability. Can work with C308,Very good delivery time. Lowest price in the world.Very good reliability.
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It integrates the functions of visible light CCD, laser ranging, GPS / Beidou Positioning second generation, electronic compass and data recording. It has the characteristics of low power consumption, small volume, light weight, compact structure, simple operation and portability to complete the detection, aiming, ranging and positioning of targets.
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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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This unit has been specifically designed to meet the needs of contractors where the necessiiy or the ability to have a Cable Drum Trailer is simply not practical.Available with either a fixed spindle (shown), i.e. drum loaded by external means, or supplied self sufficient in lifting and lowering as used on standard Cable Drum Trailers in our range.The unit comes with a range of options to suit most applications for both the Utility and Rail industries.Diesel, Petrol, Electric or PTO Drum Drive system for ease of cable payout, unit can be pendant controlled.
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Stirling cooler for cooled infrared detectors. Model: C308. Made in China. Model: C308. Made in China. Stirling cooler for cooled infrared detectors. Model: C308. Made in China. Stirling cooler for cooled infrared detectors.
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Very popular MW cooled detector in the world market. Can work with C308, C330 or C363 stirling cooler.
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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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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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