GLASS INSULATORS FOR OVERHEAD POWER TRANSMISSION LINES
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1 GLASS INSULATORS FOR OVERHEAD POWER TRANSMISSION LINES 2010
2 GLASS INSULATORS Depending on their purpose and construction, the insulators are classified as follows: line (suspension, pin, cap-and-pin); switchgear (support, pin, and post); apparatus (support, pin, post). The insulators are also divided according to their application: indoor and outdoor and operating conditions for the atmospheres: with normal; and increased level of contamination. Proceeding from this, the insulators should have definite electrical and mechanical characteristics. The most stringent requirements are placed upon the H. V. line insulators for outdoor installation in the atmospheres badly contaminated, with priming of industrial enterprises and boiler rooms, sea deposits and the like. The required mechanical characteristics are provided by the use of materials, having an appropriate mechanical strength (electrical porcelain, insulation glass, malleable and high strength iron), and creating a reliable construction of the power unit. Perfect electrical characteristics are ensured by changing and improving the configuration of insulating parts (disk, skirts, etc) with a view to increasing the creepage distance due to the development of their surface and shaping the insulators to the optimal geometrical form, promoting their self-cleaning properties of dirt. H. V. LINE SUSPENSION INSULATORS The H. V. line suspension insulators are used for insulating and fixing the conductors and ground wires in overhead power transmission lines and switchgear assemblies of stations and substations of high Hz A. C. within a temperature range of +50 C and -60 C.The insulator consists of an insulating element, a cap and a pin. The suspension insulators, when used on H. V. power transmission lines, are usually connected in series to form a string. The insulators are hinged in between by introducing into the top part of the cap (socket connector) of the following insulator pin head. To preclude a spontaneous uncoupling of a string, the pin is locked in the cap slot. The number of insulators per string depends upon the class of line, the material of supporting structures, the type insulators and local operating conditions. The transmission lines in the regions with contaminated atmospheres make use of special dirt resistant insulators with increased flashover characteristics. These insulators differ from standard ones by an increased creepage distance and higher flashover characteristics. Therefore, a creepage distance-toconstruction depth ratio of insulators and standard insulators is >3.0 and >2.2 respectively. 2
3 Electrical porcelain, due to its high electrical and mechanical strength, resistance to atmospheric effects and other properties, has long been the main dielectric material used in the production of suspension line insulators. At present the insulating glass has found a wide use for the purpose. Glass can be easily pressed and shaped to any form. The production method of glass insulators is very much easier than that of porcelain insulators and the entire process can be completely automated. Besides the insulators for AC transmission lines, the section covers insulators for 3.3 kv DC contact systems of electrified railways, operating within a temperature range of +50 C and -60 C. All the components are produced in accordance with the requirements of the IEC standards: Design and main characteristics according the IEC 305,IEC 815; Assembling accordance with IEC 120, IEC 372; Type test according the IEC 383, IEC 507, IEC 575. More than 250 mln. pcs. of insulators, manufactured by Corporation are in successful operation on transmission lines with from 0.4 to 1150 kv in Power systems of 50 countries all over the world, which is the best characteristics of excellent quality and high reliability of the insulators. 3
4 Creepage distance Mechanical failing load Puncture Component parts of glass insulator For overhead electric transmission lines No. Component Part Material Standards 1 Insulating detail hardened glass IEC 60305/ Cap 3 Pin Locking device: 4 Lock Split-pin high-strength cast-iron, with corrosion- resisting coverage, produced by hot galvanizing method carbon low-alloyed or steel, heat-treated for ensuring of necessary mechanical properties, with corrosion--resisting coverage, produced by hot galvanizing method stainless corrosion-resisting steel or phosphor bronze, with hardness not less than 180 HB IEC 60120/1984 IEC 60120/1984 IEC 60372/1984 Insulators nomenclature for overhead lines Type IEC Disk diameter Dimensions Spacing Standard coupling according to IEC Withstand Dry Wet Impulse mm mm mm mm kn kv kv kv kv kg U 40B ,5 U70BS/B/BL /140/ ,7 U 100BL ,1 U 120B/BL / ,2 U 125BS/BL / ,5 U 160BS/BL / ,2 U 210BS/BL / ,7 U 300B ,0 U 70BP ,8 U 70BLP ,3 U100BLP ,4 U 120BP / ,2 U 160BP /155/ U160BLP /195 20/ ,8 U210BLP /195 20/ ,2 U240BLP /195 20/ ,4 U 300B / ,2 U300BLP / ,3 Mass 4
5 U40B, U70BS, U70BL, U100BL, U120B/U120BL Standards: IEC Designation IEC 305 U40B U70BS U70BL U100BL U120B (Latin letters) PS40А PS70Е PS70Е PS100E PS120B Minimum mechanical failing load kn Minimum mechanical residual strength kn Diameter of the insulating part, D mm Spacing, H mm Creepage distance mm / / Ball and socket coupling, d mm Puncture in insulating medium Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv kv kv kv 75/75 100/ / / /100 db kv db kv Weight kg 2,5 3.4/ /3.6 4,
6 U160BS, U160BL, U210BS, U210BL, U240B, U300B Standards: IEC 305 Designation Minimum mechanical failing load Minimum mechanical residual strength Diameter of the insulating part, D IEC 305 U160BS U160BL U210BS U210BL U240B U300B (Latin letters) PS160D PS160D PS210D PS210D PS240B PS300B kn kn mm Spacing, H mm Creepage distance mm Ball and socket coupling, d Puncture in insulating medium Dry power frequency withstand Wet power frequency withstand Dry lighthing impulse withstand 1.2/50 (+/-) Radio interference mm kv kv kv kv 110/ / / / / /130 db kv Weight kg ,7 6,7 6,8 10,7 6
7 U70BP, U70BLP, U100BLP, U120BP Standards: IEC 305 Designation IEC 305 U70BP U70BLP U100BLP U120BP (Latin letters) PSV70B PSV70A PSV100A PSV120B Minimum mechanical failing load kn Minimum mechanical residual strength kn Diameter of the insulating part, D mm Spacing, H mm /170 Creepage distance mm / / /450 Ball and socket coupling, d mm Puncture in insulating medium kv Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv kv kv 100/ / / /125 db kv db kv Weight kg
8 U160BP, U160BLP, U210BP, U240BLP Standards: IEC 305 Designation IEC 305 U160BP U160BLP U210BP U240BLP (Latin letters) PSV160B PSV160A PSV210B PSV210A Minimum mechanical failing load kn Minimum mechanical residual strength kn Diameter of the insulating part, D mm Spacing, H mm / /195 Creepage distance mm 540/ / / /561 Ball and socket coupling, d mm 20 20/ Puncture in insulating medium Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv kv kv kv 140/ / / /140 db kv db kv Weight kg
9 U 300BP/U300BL Standards: IEC 305 Designation IEC 305 U160BP U160BLP (Latin letters) 9 PS 300V PS 300A Minimum mechanical failing load kn Minimum mechanical residual strength kn Diameter of the insulating part, D mm Spacing, H mm 170/ /195 Creepage distance mm Ball and socket coupling, d mm Puncture in insulating medium Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv kv kv kv 130/ /140 db kv db kv Weight kg 12,2 14,3
10 PSD70Е Standards: Designation IEC 305 (Latin letters) PSD70E Minimum mechanical failing load kn 70 Minimum mechanical residual strength kn 56 Diameter of the insulating part, D mm 270 Spacing, H mm 127 Creepage distance mm 411 Ball and socket coupling, d mm 16 Puncture in insulating medium kv 130 Dry power frequency withstand kv 75 Wet power frequency withstand kv 45 Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv 110/110 db 60 kv 20 db 86 kv 25 Weight kg
11 PACKING Universal package (UP) Cylindrical package (CP) Capacity of CP: Depending on type of insulators it is possible to pack garlands of 4, 5 or 6 insulators. Grate package (GP) Capacity of GP depend on type of insulators 11
12 Load standards for transportation are as follows TYPE OF INSULATOR Acc. DTSU (GOST ) PS 40 PS 70E Acc. to IEC 60305/1995 U 40 B U 70 BS/BL PSD 70E - Diameter of insulator, mm Spacing, mm, BS/BL Weight of insulator, kg Truck, 20-ton UP, 294 pcs each BRUTTO kg / (U70BS) 25 UP, 200 pcs each BRUTTO kg 5000(U70BL) 25 UP, 200 pcs each BRUTTO kg UP, 140 pcs each BRUTTO kg Load standards of insulators, pcs 40-foot container UP, 539 pcs each BRUTTO kg 6360 (U70BS) 1060CP,6pcs each BRUTTO kg 5580 (U70BL) 930 CP, 6pcs each BRUTTO kg CP,5 pcs each BRUTTO kg Railway car UP, 294 pcs each BRUTTO kg UP, 200 pcs each BRUTTO 23027,2 kg UP, 140 pcs each BRUTTO kg PS 120B U 120 B / UP, 175 pcs each BRUTTO 20610,2 kg UP, 200 pcs each BRUTTO 19795,6 kg CP, 6 pcs each BRUTTO kg UP, 200 pcs each BRUTTO 28793,6 kg PS 160D U 160 BS/BL / UP, 120 pcs each BRUTTO kg 3500 (U160BS) 875 CP, 4 pcs each BRUTTO kg 3136 (U160BL) 784 GP, 4 pcs each BRUTTO 21873,6 kg UP, 140 pcs each BRUTTO kg PSS120B UP, 100 pcs each BRUTTO kg GP, 5 pcs each BRUTTO kg UP, 100 pcs each BRUTTO kg PSV120B U 120BP (U 120Fog) UP, 120 pcs each BRUTTO kg GP, 5 pcs each BRUTTO kg 3840/ UP, 120/140 pcs each BRUTTO 24608/28496 kg PS 210B U 210B UP, 120 pcs each BRUTTO kg GP, 5 pcs each BRUTTO 19353,6 kg UP, 120 pcs each BRUTTO kg PS 300B U 300 B / UP, 45/60 pcs each BRUTTO 16704/21504 kg GP, 4 pcs each BRUTTO kg 1575/ UP, 45/60 pcs each BRUTTO 16704/21504 kg SS 10D UP, 400 pcs each BRUTTO kg UP, 400 pcs each BRUTTO kg UP,400 pcs each BRUTTO kg 12
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