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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Conductive partThe fixed contact is composed of a copper plate bent into a right angle, and the perforated end of the fixed contact can be connected with the bus through a screw; The other end is short, and it contacts the moving blade (moving contact) when closing.Two copper plates form a contact strip, also known as a moving contact, which can rotate around the shaft for a certain angle. When closing, it holds the static contact. There is a clamping spring between the two copper plates to adjust the contact pressure between the dynamic and static contacts.
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1. Reasonable design, novel structure, reliable technical performance, compact shape, light weight, flexible installation, high tensile strength, collision resistance, and no damage during transportation;2. The advantages of silicon rubber sheathed metal oxide arrester are cited.
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GN38-12KV series indoor disconnectors are designed and manufactured to meet the needs of compact and miniaturized development of fixed high-voltage cabinets and ring network cabinets. It has a three position structure, fully insulated bottom plate, and is equipped with coaxial locking and perfect mechanical interlocking mechanism, which is compact in shape.
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The discharge counter for lightning arrester is a high-voltage electrical apparatus used to monitor the discharge action of lightning arrester. Its structure consists of nonlinear resistance, electromagnetic counter and some electronic components. Under normal operating voltage, the leakage current flowing through the counter is very small, and the counter does not act.
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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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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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The circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker body, which can be used as a fixed installation unit or equipped with a special propulsion mechanism to form a handcart unit.Model and meaning This type of product is equipped with a bistable permanent magnet operating mechanism. The mechanism is equipped with a permanent magnet. The permanent magnet provides the holding force to keep the switch in the closed and open state.
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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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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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Type B double tube binocular low light level observation mirror can assist pilots to directly observe the environment and search targets in the night, complete night takeoff and landing, formation flight, visual recognition of landmark landform, heaven and earth line, aerial reconnaissance and recognition, search and recognition of ground targets at low altitude, and cooperate with forward-looking infrared to search.
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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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Very good delivery time. Lowest price in the world. Can work with C308, C330 or C363 stirling cooler. 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. Very good reliability. Very good delivery time. Lowest price in the world. Can work with C308, C330 or C363 stirling cooler.Can work with C308, C330 or C363 stirling cooler.Very good delivery time. Lowest price in the world. Very good reliability.
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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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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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Distribution ArresterProduct use conditions:a) Suitable for indoor and outdoor use;b) Ambient temperature -40°C~+40°C;c) The altitude does not exceed 3000m (the porcelain sleeve type does not exceed 1000m);d) The power frequency is not less than 48Hz and not more than 62 Hz;e) The long-term power frequency voltage applied between the arrester terminals does not exceed the continuous operating voltage of the arrester;f) Areas with an earthquake intensity of 8 degrees or below;g) The maximum wind speed shall not exceed 35m/s. Product Model Description:According to JB/T 8459-1996 "Surge
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Metal Oxide ResistorsThe metal oxide resistor is the core part of the lightning arrester. It uses zinc oxide as the main component, adding a small amount of bismuth oxide, cobalt oxide, chromium oxide, manganese carbonate, antimony oxide and other trace additives, and is sintered at high temperature. The microstructure of metal oxide resistors is mainly composed of zinc oxide grains, grain boundary layer and spinel phase.
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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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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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1) It is used to protect electrical equipment from high transient over-voltage and limit the freewheeling time and the freewheeling amplitude.
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The direct coupled low light level enhanced digital camera (idc1616) adopts the advanced image tube direct coupling technology to integrate the digital camera and image intensifier, forming a new generation of low illumination digital night vision equipment with compact structure, high sensitivity and clear imaging.
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