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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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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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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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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purposeHigh voltage disconnector is a kind of high-voltage equipment used to connect or isolate power supply under the condition of voltage and no load.□ Service conditions1. Altitude not exceeding 1000m2. Ambient air temperature: upper limit+40 ° C in general area, lower limit 30 ° C in general area3. The wind pressure shall not exceed 700Pa. (equivalent to wind 34m/s)4. The seismic intensity shall not exceed 8 degrees;5. No place with frequent violent movements;6.
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It is mainly used for non-contact monitoring of dangerous gas leakage at industrial site. It can also be used for coal mine monitoring, high-voltage power transmission and transformation detection, subway safety monitoring, environmental protection and fire rescue.Types of industrial hazardous gases that can be monitored:Hydrogen sulfide, ammonia, propane, sulfur dioxide, methanol, ethylene, methane, sulfur hexafluoride, dichloromethane, ether.
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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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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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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, C330 or C363 stirling cooler. Very good reliability. Very good delivery time. Lowest price in the world. Lowest price in the world. Very good delivery time. Very good reliability. Can work with C308, C330 or C363 stirling cooler.
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HT series reflective infrared collimator is used for the assembly, correction and detection of infrared optical products and optical parts. It has long focal length, large aperture and high precision. It is a necessary general equipment for the production and testing of infrared optical instruments.
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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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ZFN21-12D/630-20, ZFN21-12DR/T125-31.5 high-voltage vacuum load switch and combination apparatus are used in three-phase AC 10KV, 50Hz power distribution system. It has the advantages of compact structure, small volume, light weight, long service life, strong making and breaking capacity, safety and reliability, etc.
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Most advanced stirling cooler in the world. Very powerful cooling ability.
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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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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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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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GN30-12 rotary indoor high-voltage disconnector is a new type of rotary contact disconnector. Its main structure is to fix two groups of insulators and contacts on the upper and lower planes of the three-phase common chassis, and to achieve switch on by rotating the contact.The GN30-12D switch is an additional form with grounding knife on the basis of the GN30-12 switch, which can meet the needs of different power systems. This product is compact in design, small in point space, strong in insulation capacity, and easy to install and adjust.
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