GLASS INSULATORS FOR OVERHEAD POWER TRANSMISSION LINES 2010
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 - 50-60 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
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
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 60305/1985 2 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 60305 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 175 110 11 190 40 90 55 30 75 2,5 U70BS/B/BL 255 127/140/146 16 320 70 130 70 40 100 3,7 U 100BL 255 146 16 320 100 130 70 40 100 4,1 U 120B/BL 255 146/170 16 320 120 130 70 40 100 4,2 U 125BS/BL 255 146/170 20 320 125 130 70 40 100 4,5 U 160BS/BL 280 146/170 20 380 160 130 75 45 110 6,2 U 210BS/BL 280 155/170 20 380 210 130 75 45 110 6,7 U 300B 320 195 24 485 300 130 75 45 110 10,0 U 70BP 255 146 16 400 70 130 80 43 120 4,8 U 70BLP 280 146 16 450 70 130 80 43 120 5,3 U100BLP 280 146 16 450 100 130 80 45 120 5,4 U 120BP 280 146/170 16 450 120 130 80 45 120 6,2 U 160BP 280 146/155/170 20 450 160 130 80 45 120 7 U160BLP 320 170/195 20/24 540 160 130 90 55 135 8,8 U210BLP 320 170/195 20/24 550 210 130 90 55 135 9,2 U240BLP 320 170/195 20/24 550 240 130 90 55 135 9,4 U 300B 340 170/195 24 550 300 130 90 55 135 12,2 U300BLP 380 170/195 24 635 300 130 90 55 135 14,3 Mass 4
U40B, U70BS, U70BL, U100BL, U120B/U120BL Standards: IEC 60305 Designation IEC 305 U40B U70BS U70BL U100BL U120B (Latin letters) PS40А PS70Е PS70Е PS100E PS120B Minimum mechanical failing load kn 40 70 70 100 120 Minimum mechanical residual strength kn 32 56 56 80 96 Diameter of the insulating part, D mm 175 255 255 255 255 Spacing, H mm 110 127 146 146 146 Creepage distance mm 190 303/320 303/320 320 320 Ball and socket coupling, d mm 11 16 16 16 16 Puncture in insulating medium Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv 100 130 130 130 130 kv 55 70 70 70 70 kv 30 40 40 40 40 kv 75/75 100/100 100/100 100/100 100/100 db 60 60 60 60 kv 20 20 20 20 db 86 86 86 86 86 kv 25 25 25 30 30 Weight kg 2,5 3.4/3.6 3.4/3.6 4,1 3.9 5
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 160 160 210 210 240 300 kn 128 128 168 168 168 240 mm 280 280 280 280 280 320 Spacing, H mm 146 170 155 170 170 195 Creepage distance mm 380 380 380 380 380 485 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 20 20 20 20 24 24 kv 130 130 130 130 130 130 kv 75 75 75 75 75 75 kv 45 45 45 45 45 45 kv 110/110 110/110 110/110 110/110 130/130 130/130 db 86 86 86 86 86 86 kv 35 35 40 40 40 40 Weight kg 6.2 6.2 6,7 6,7 6,8 10,7 6
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 40 70 100 120 Minimum mechanical residual strength kn 32 56 96 96 Diameter of the insulating part, D mm 255 280 280 280 Spacing, H mm 146 146 146 146/170 Creepage distance mm 400 442/450 442/450 442/450 Ball and socket coupling, d mm 11 16 16 16 Puncture in insulating medium kv 100 130 130 130 Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv 70 80 80 80 kv 40 45 45 45 kv 100/100 125/125 125/125 125/125 db 60 60 60 kv 20 20 20 db 86 86 86 86 kv 25 25 30 30 Weight kg 3 5.3 5.4 6.2 7
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 160 160 210 240 Minimum mechanical residual strength kn 128 128 168 168 Diameter of the insulating part, D mm 320 320 320 320 Spacing, H mm 146 170 170/195 170/195 Creepage distance mm 540/545 540/545 550/561 550/561 Ball and socket coupling, d mm 20 20/24 20 20 Puncture in insulating medium Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv 130 130 130 130 kv 90 90 90 90 kv 55 55 55 55 kv 140/140 140/140 140/140 140/140 db 34 34 34 34 kv 10 10 10 10 db 86 86 86 86 kv 35 35 40 40 Weight kg 8.28 8.28 9.2 9.4 8
U 300BP/U300BL Standards: IEC 305 Designation IEC 305 U160BP U160BLP (Latin letters) 9 PS 300V PS 300A Minimum mechanical failing load kn 300 300 Minimum mechanical residual strength kn 240 240 Diameter of the insulating part, D mm 340 340 Spacing, H mm 170/195 170/195 Creepage distance mm 550 635 Ball and socket coupling, d mm 24 24 Puncture in insulating medium Dry power frequency withstand Wet power frequency withstand Dry lightning impulse withstand 1.2/50 (+/-) Radio interference kv 130 130 kv 90 90 kv 55 55 kv 130/140 130/140 db 60 60 kv 20 10 db 86 86 kv 40 40 Weight kg 12,2 14,3
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 4.6 10
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
Load standards for transportation are as follows TYPE OF INSULATOR Acc. DTSU 2203-93 (GOST 6490-93) 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 175 110 1.7 8820 30 UP, 294 pcs each BRUTTO 18300 kg 255 127/146 3.4 5000(U70BS) 25 UP, 200 pcs each BRUTTO 19740 kg 5000(U70BL) 25 UP, 200 pcs each BRUTTO 19990 kg 270 127 4.4 3920 28 UP, 140 pcs each BRUTTO 20748 kg Load standards of insulators, pcs 40-foot container 7546 14 UP, 539 pcs each BRUTTO 14700 kg 6360 (U70BS) 1060CP,6pcs each BRUTTO 25228 kg 5580 (U70BL) 930 CP, 6pcs each BRUTTO 22134 kg 4760 952 CP,5 pcs each BRUTTO 24657 kg Railway car 9408 32 UP, 294 pcs each BRUTTO 19520 kg 6400 32 UP, 200 pcs each BRUTTO 23027,2 kg 4480 32 UP, 140 pcs each BRUTTO 23712 kg PS 120B U 120 B 255 146/170 3.9 4550 26 UP, 175 pcs each BRUTTO 20610,2 kg 4400 22 UP, 200 pcs each BRUTTO 19795,6 kg 5580 930 CP, 6 pcs each BRUTTO 25114 kg 6400 32 UP, 200 pcs each BRUTTO 28793,6 kg PS 160D U 160 BS/BL 280 146/170 6.2 2880 24 UP, 120 pcs each BRUTTO 20304 kg 3500 (U160BS) 875 CP, 4 pcs each BRUTTO 24500 kg 3136 (U160BL) 784 GP, 4 pcs each BRUTTO 21873,6 kg 4480 32 UP, 140 pcs each BRUTTO 27072 kg PSS120B 330 146 5.0 3200 32 UP, 100 pcs each BRUTTO 18880 kg 2340 468 GP, 5 pcs each BRUTTO 14500 kg 3200 32 UP, 100 pcs each BRUTTO 18880 kg PSV120B U 120BP (U 120Fog) 290 146 5.6 3120 26 UP, 120 pcs each BRUTTO 19994 kg 3200 640 GP, 5 pcs each BRUTTO 24320 kg 3840/4480 32 UP, 120/140 pcs each BRUTTO 24608/28496 kg PS 210B U 210B 300 170 7.1 2400 20 UP, 120 pcs each BRUTTO 19080 kg 2160 432 GP, 5 pcs each BRUTTO 19353,6 kg 3840 32 UP, 120 pcs each BRUTTO 30528 kg PS 300B U 300 B 320 195 10.0 1575/1920 32 UP, 45/60 pcs each BRUTTO 16704/21504 kg 1728 432 GP, 4 pcs each BRUTTO 21600 kg 1575/1920 32 UP, 45/60 pcs each BRUTTO 16704/21504 kg SS 10D 160 145 1.9 9200 23 UP, 400 pcs each BRUTTO 20240 kg 9200 23 UP, 400 pcs each BRUTTO 20240 kg 12800 32 UP,400 pcs each BRUTTO 28160 kg 12