U40b U70 U100 U120 U160 U210 U240 U300 Sxp-70 Sxp-1oo Sxp-120 Sxp160 Sxp-210 Sxp-240 Sxp-300 Notes: product information given in above is just for reference. We can design and make products in accordance with the specific requirements of the customers or the drawings provided by the customers. Standard type toughened glass insulator is used for high voltage and extra high voltage ac and dc transmission lines insulated and dangling wires.Good self-cleaning properties and not easy to aging.
Fs-10/2.5 Fs-10/5 Fs-15/6 Fs-20/5 Fs-35/5 Fs-35/6 Fsw-110/10 Notes: product information given in above is just for reference. We can design and make products in accordance with the specific requirements of the customers or the drawings provided by the customers. Excellent hydrophobicity. Excellent electrical insulation properties. End fittings are crimped onto fiberglass rod with voice-operated displacement type crimper. High mechanical strength. The connection location between end fittings & rods is fused with sheds housing by the overall high temperature vulcanized silicone rubber injection molding as it could minimize the interface. Composite Cross-arm Insulator Composite-cross-arm-insulator is suitable for the innovation of urban electrical network where its streets are narrow. It can effectively reduce the neccessary height of the pole or tower. Due to high bent resistant capacity, there will completely avoid the case that porcelain cross-arm happen to crack. Moreover , it can be well pollution resistance.
Large power transformers are in the power range above 250 mva, generator and network intertie transformers with off-load or on-load tap changers, or a combination of both, are recommended. Depending on the on-site requirements, they can be designed as multiwinding transformers or autotransformers, in 3-phase or 1-phase versions. Even with ratings of more than 1, 000 mva and voltages up to 1, 200 kv (800 kv), the feasibility limits have not yet been reached. We manufacture these units according to iec 60076 as well as other international and national standards (e.G., ansi/ieee). Generator step-up (gsu) transformers Gsu units transform the voltage up from the generator voltage level to the transmission voltage level, which may be as high as 1, 200 kv system voltage. Such transformers are usually ynd-connected. In order to make an inquiry regarding a gsu power transformer, the technical data for the items in this section are required. Step-down transformers Step-down transformers transform the voltage down from the transmission voltage level to an appropriate distribution voltage level. The power rating of step-down transformers may range up to the power rating of the transmission line.
HVDC transformers are key components of HVDC stations. HVDC converter and inverter stations terminate long-distance DC transmission lines or DC sea cables. This type of transformer provides the interface between AC grids and high power rectifiers and are used to control the load flow over the DC transmission lines. These actors adapt the AC grid voltage to an adequate level which is suitable for feeding the valve system of DC converter and inverter. Design options The design concept of HVDC transformers is mainly influenced by the rated voltage, rated power and transportation requirements like dimensions, weight and mode of transportation. Many large power HVDC converter station are located in rural areas of low infrastructure. Frequently, special geometrical profiles have to be fulfilled in order to move such transformers by railway. Typically, HVDC transformers are single phase units containing 2 winding limbs. This concept can include either 2 parallel valve windings (two for delta or two for wye system, fig. 5.8-1) or two different valve windings. In order to reduce the total transportation height frequently the core assembly includes 2 return limbs. Due to redundancy requirements in HVDC stations 3 phase units are quite uncommon. The valve windings are exposed to AC and DC dielectric stress and therefore a special insulation assembly is necessary. Furthermore, special lead systems connecting the turrets and windings have to be installed in order to withstand the DC voltage of rectifier. Additionally, the load current contains harmonic components of considerable energy resulting in highe r losses and increased noise. Above all, special bushings are necessary for the valve side to access upper and lower winding terminals of each system from outside. Conclusively, two identical bushings are installed for star or delta system. For approving the proper design and quality of manufacturing special applied DC and DC polarity reversal tests have to be carried out. The test bay has to be equipped with DC test apparatus accordingly and needs to provide adequate geometry to withstand the DC test voltage. HVDC Transformers react as coupling elements between the connected AC grids and high power rectifiers, and are necessary for adapting the voltage. They insulate the rectifier itself from the AC grid and generate a phase shift. New HVDC applications are seen between existing, well-established networks. A back-to-back link can easily combine two different AC networks together, even with different frequencies. Such solutions can also help customers to strengthen and optimize their networks. The changing environment provides more and more opportunities to HVDC solutions, and Siemens is prepared to provide its customers with either our solution or with converter transformers as a loose component .
Stranding sst opgw is cable product that produced by way of comprehensive stranding the acs wires and sst optical unit which replaced one or some of acs wires of traditional ground wire cable. It realized the function of optical fiber communication and has bigger diameter and more optical fiber compared with center sst opgw. Structure characteristics and application Big diameter and more optical fiber Big tensile strength and short-circuit current capacity, arrive the best balance of machanical and electrical properties One or more optical unit Best design of stranding, obtain secondary optical fiber extra length Strands plies can be two or three, the wire can be acs wire and/or the combination of aluminium alloy wire and aluminium wire.
Pvc welding cable.
Single Core Wire.
XLPE Power Cable.
Fpq-10/4t20 Fpq-10/2.5 Fpq-10/5t20 Fpq-24/8 Fpq-33/5 Fpq-33/12.5 Fpq-36/8 Notes:product information given in above is just for reference. We can design and make products in accordance with the specific requirements of the customers or the drawings provided by the customers. This product performs well in resisting impact, earthquake, and brittle fracture. High hydrophobicity, tensile strength, and flexural strength. High mechanical strength. Light in weight, convenient to install. Excellent resistance to aging, tracking, and erosion. With high mechanical strength, this product performs well in resisting impact, earthquake, and brittle fracture. The pin composite insulator is used in high voltage lines. It has excellent resistance to aging, tracking, and erosion. It also has high hydrophobicity, tensile strength, and flexural strength. With high mechanical strength, this product performs well in resisting impact, earthquake, and brittle fracture. Light in weight, it is convenient to install. In addition, the top and bottom installation dimensions are the same with those of porcelain type pin insulator, so these two products can be interchanged with each other.
The core of aluminum clad pbt tube opgw has structure of stranding pattern, when the multiple optical fiber pbt tubes are into cable, a layer of seamless aluminum tube will be clad on it which act as the protection tube of optical fiber metal and then stranding one or more aluminium clad steel wires or aluminum alloy wires outside it. It eliminates the worries about the electrochemical corrosion among different metals and has very high application value. Structure characteristics and application Seamless aluminum tube has uniform texture, consistent with the texture of the whole ground aluminum clad steel wire, no electrochemical corrosion Good fatigue resistance profit by consistence of texture and structure of the whole ground wire Optical fiber of aluminum tube opgw are exist in pbt tube, the core which is clad with a layer of thermal insulation material, with good thermal insulation effect and good protection effect of fiber optics, and short-circuit current has little influence to transmitting performance of fiber optics.
Center sst opgw cable is a kind of overhead grounding wire which take sst optical unit as the center, concentric stranding the acs wires at outer layer according to certain lay ratio. It is widely used in modern information electric power system. Structure characteristics and application Small diameter and light weight, small short-circuit current capacity Optical unit forms appropriate primary optical fiber extra length Characteristics of tension resistance, torsion resistance and side pressure resistance are not good enough Suitable for matching with gj-35 gj-50 gj-70.
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