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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Drop type (drop type, detachable type) lightning arrester is a distribution type zinc oxide lightning arrester that is modified and skillfully installed on the drop type mechanism of the drop type fuse, so that the lightning arrester can be easily detected, repaired and replaced with the help of an insulating switch lever under the condition of continuous power supply, which not only ensures the smoothness of the line, but also greatly reduces the work intensity and time of power maintenance personnel, It is especially suitable for places that are not suitable for power failure, such as post a
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GW4 type outdoor high-voltage disconnector is used for three-phase AC 50Hz outdoor high-voltage electrical equipment, which is used for opening and closing of lines under the condition of voltage and no load, and for electrical isolation of electrical equipment such as overhauled high-voltage buses and circuit breakers from live high-voltage lines. It can also be used for opening and closing small capacitive or inductive currents. When the knife switch is in the normal opening position, an insulation distance meeting the safety requirements can be provided.
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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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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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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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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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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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All of the Cable Trailers described below are equipped with braking and road lighting systems to conform to the relevant European type approval specifications and are designed to travel fully laden at road speeds indicated on all European highways. Our full range of highway cable drum trailers and trailer mounted winches can now be used within all European countries without the need for additional individual country inspectionsand approval.For safe and easy drum handling, all SEB Cable Drum Trailers are fitted with hydraulic hand pump operated Iift/lower systems as standard.
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(H) GW5 type outdoor high-voltage disconnector is used for three-phase AC 50Hz outdoor high-voltage electrical equipment, which is used for opening and closing of lines under the condition of voltage and no load, and for electrical isolation of electrical equipment such as overhauled high-voltage buses and circuit breakers from live high-voltage lines. It can also be used for opening and closing small capacitive or inductive currents. When the knife switch is in the normal opening position, an insulation distance meeting the safety requirements can be provided.
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The overall structure of this product adopts a three-phase common box type, the bushing enters and exits the line, the box is filled with dry air, and the electric spring fan operating mechanism is arranged on the side of the box, which can be used reliably under severe environmental conditions. The vacuum interrupter of this product adopts ceramic shell, cup-shaped longitudinal magnetic field contact structure, copper chromium contact material, and has excellent breaking and closing short-circuit current capacity. The product is small in size, light in
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Product OverviewGW1-12G (D) series outdoor high-voltage disconnectors are unipolar high-voltage switchgear. They are used to open and close the circuit when there is voltage or no load in the outdoor 12KV line network. The switches with grounding knives are equipped with CS mouth type manual mechanisms to prevent the misoperation of live grounding wires and grounding wires, "closing", etc.
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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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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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Type a double tube binocular low light level observation mirror has the characteristics of clear imaging, good concealment, light structure and low power consumption. The product is suitable for driving aircraft for takeoff, landing, low altitude and ultra-low altitude missions at night or in low illumination environment; It can also be used for vehicle driving, patrol, medical rescue, observation, monitoring and reading.
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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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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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Low illumination CMOS is a new type of digital solid-state low light level imaging device. It has the characteristics of low illumination and high sensitivity. It can image clearly at low illumination (< 10-2lux).According to customer requirements, the development of helmet mounted low illumination CMOS camera and small batch trial production have been completed. Helmet mounted low illumination CMOS camera has the function of non direct viewing video, which is mainly used in the fields of investigation, counter-terrorism, communication and so on.
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(H) GW4 type outdoor high-voltage disconnector is used for three-phase AC 50Hz outdoor high-voltage electrical equipment, which is used for opening and closing of lines under the condition of voltage and no load, and for electrical isolation of electrical equipment such as overhauled high-voltage buses and circuit breakers from live high-voltage lines. It can also be used for opening and closing small capacitive or inductive currents. When the knife switch is in the normal opening position, an insulation distance meeting the safety requirements can be provided.
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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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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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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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Front discharge detector, power detector, mainboard detector, front discharge tooling cable, power tooling cable, mainboard tooling cable, scanner tooling cable, refrigerator, detector tooling cable, display detector, special tooling cable for thermal sensing head.1.Software version identification and software loading of thermal sensor head of thermal imager;2.Simulation control of thermal sensor head of thermal imager;3.Adjustment of internal parameters of thermal sensor head of thermal imager;4.Fault discrimination of thermal sensor head, display / controller and cable assembly of thermal im
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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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