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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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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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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Due to electromagnetic induction, the metal shielding layer (or metal sheath) of long line high-voltage single core power cables generates induced voltage, which leads to aging of insulation and reduction of insulation grade, resulting in reduced cable life. Once the induced voltage exceeds the sheath breakdown voltage, the outer sheath is broken down, forming a multi-point grounding fault of single core cables.
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It can diagnose the fault of the thermal imager through the communication port of the thermal imaging system, locate the fault group components conveniently and quickly according to the built-in fault expert database, and greatly improve the maintenance efficiency of the fault thermal imager;Through the self-developed comprehensive performance test algorithm of thermal imager, it is convenient and accurate to test the performance parameters of thermal imager: minimum resolvable temperature difference (MRTD), minimum detectable temperature difference (mdtd), field of view (FOV), zero travel mom
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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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Most advanced stirling cooler in the world. Very powerful cooling ability. Very powerful cooling ability. Most advanced stirling cooler in the world.
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Long focal length: it can provide higher spatial frequency for the system to be tested; Large aperture: provide testing possibility for multi-channel optical system; The target plate and blackbody have high infrared emissivity; The system is equipped with vibration isolation air cushion platform; Electrically controlled target wheel is easy to operate and replace; It can meet the test of large aperture thermal imaging system; It can realize the semi-automatic test of all the main parameters of the thermal imager system; High performance test software system.The parameters of the thermal imager
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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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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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The SEB range of Adjustable Width Cable Drum Trailers are designed to cope with the ever increasing size of Cable Drums, High Voltage cables are being laid underground instead of over headlines.
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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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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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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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CMOS hand-held night vision instrument is a portable photoelectric night vision instrument, which can observe the target under all-weather conditions.
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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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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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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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The low light level sight integrates the functions of observing and aiming, measuring the target distance and setting the weapon firing angle. It has the characteristics of small volume, light weight, high aiming accuracy, good reliability and convenient carrying. It can be used not only as a night sight, but also as an observation command mirror for night observation. It is mainly used for observation and monitoring by personnel of border armed police, public security and other units, and it is a precision optical instrument product for assisting gun aiming and shooting at night.
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The general low light level gun sight is a sight with high definition, good combination of gun and mirror, strong adaptability, reliability and durability, stable performance, good man-machine efficiency and low cost. It is suitable for short-range accurate shooting at night and can solve the rapid aiming and accurate shooting at 25-100 meters at night. The fixture can be quickly changed to adapt to various gun types.
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