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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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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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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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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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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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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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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□ 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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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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(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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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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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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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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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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The multifunctional handheld thermal imager has the functions of infrared, visible light observation, GPS positioning, orientation and laser ranging, and can realize the observation of targets in day and night and under adverse weather conditions
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use environment a. The altitude does not exceed 1000 meters; b. The surrounding air environment has no conductive dust and no corrosive, flammable and explosive gases, etc.; c. Wind pressure does not exceed 100Pa (equivalent to wind speed 34m/S); d. The earthquake intensity does not exceed magnitude 8; e. The annual temperature difference ratio is within ±40°C.
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Fuse selection The selection of the fuse should ensure that the distribution transformer internal or the high and low voltage outlet pipe can be quickly fused when there is a short circuit. In practice, the following principles are often used for selection; if the capacity of the distribution transformer is below 160KV, the fuse should be 2-2% of the rated current of the transformer.
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