GOB套管_样本_英文

Transformer bushings, type GOB Technical guide 1ZSE 2750-102 en, Rev. 6, 2004-03-15 This Technical Guide has been produced to allow transformer manufacturers, and their designers and engineers, access to all the technical information required to assist them in their selection of the appropriate Transformer Bushing. The Guide should be used in conjunction with the Selection Guide to allow the optimum selection to be made. The technical information pertaining to bushings manufactured by ABB has been divided into separate documents, with one document for each type. The information provided in this document is intended to be general and does not cover all possible applications. Any specific application not covered should be referred directly to ABB, or its authorized representative. ABB makes no warranty or representation and assumes no liability for the accuracy of the information in this document or for the use of such information. All information in this document is subject to change without notice. Table of Contents Design _______________________ 4 Test tap ____________________________ 4 Testing _______________________ 5 Test tap adapter _____________________ 5 Electrical data _________________ 6 Common specifications __________ 6 Conductor loading ______________ 7 Overloading of bushings _______________ 7 Short-time current ____________________ 7 52 – 170 kV Dimensions _________________ 8 Bushings without oil level gauge ______ 8 Shed form _______________________ 9 Bushings with oil level gauge _________ 10 Shed form _______________________ 11 Ordering particulars___________ 12 Bushings without oil level gauge ______ 12 Bushings with oil level gauge _________ 14 Connection details ____________ 16 Inner terminal _____________________ 16 Solid rod conductor ________________ 16 Outer terminal ____________________ 16 Separate terminal plate with bolts _____ 17 Arcing horns______________________ 17 300 kV Dimensions _________________ 18 Type GOB 1050 ___________________ 18 Shed form _______________________ 18 Ordering particulars___________ 19 Type GOB 1050 ___________________ 19 Recommendations for positioning _ 20 4 Fig. 1. Transformer bushing type GOB Outer terminal stud Expansion space Design The bushing is built up around a centre tube on which the condenser body is wound. The upper insulator, lower insulator and mounting flange are held between the end plates by the centre tube. Sealing is accomplished by oil-resistant rubber gaskets in grooves. The annular space between the condenser body and the porcelain is filled with transformer oil. A gas-filled expansion space is left at the top. For GOB bushings without oil level gauge the oil level can be checked by means of a dipstick in the oil filling hole. The lower end is shielded by an epoxy resin insulated aluminium shield. The shield is integrated for 52 – 170 kV, and separate for 300 kV bushings. The inner terminal is attached to the centre tube by means of a through-going resilient pin which becomes locked when the outer terminal is screwed on. This design, patented by ABB, ensures effective electrical contact between the inner and outer terminals. The inner terminal can be chosen for connection to leads either by brazing or crimping. The outer terminal is available in aluminium or copper alloy and can be supplemented by terminal plates of corresponding material. The upper insulator is made in one piece of high quality electrical porcelain. The mounting flange is manufactured of corrosion-resistant aluminium alloy. The mounting flange, the top housing and the top washer are protected by painting with a two-component primer and a grey-blue finishing coat of paint. The standard colour is Munsell 5.5B 55/1.25, environmental class C3. The bushings are delivered oil-filled and ready for use. If the bushing is mounted with an inclination of more than 45° from the vertical, special measures may have to be taken to ensure the condenser body is fully submerged in oil. Further information can be obtained on request. Test tap The outer conducting layer of the condenser body is connected to an insulated test tap on the flange. During operation the test tap cover must be screwed on, in order to earth the bushing. The max. test voltage of the tap is 2 kV, 50 Hz for 1 minute. Max. service voltage is 600 V. Oil Porcelain insulator air side Oil filling holes with sealing plug Test tap Mounting flange Flange extension Porcelain insulator oil side Condenser body Insulated shield (integrated or separate) Prism glass Top housing Oil filling holes with sealing plug Top housing Fig. 2. Test tap Top washer goh_0010 5 Fig. 3. Test tap adapter, 2769 531-D. goh_0011 Testing During the manufacture and on its completion the bushing is subjected to a number of routine tests, in compliance with IEC 60137. A tightness test is carried out on the assembled bushing after the final drying and impregnation. The test is made with an oil overpressure of 180 kPa (1.8 bar) for 12 hours at ambient temperature. No sign of leakage is allowed. Each bushing is subjected to a final electrical routine test. The test is made at room temperature with the bushing submerged in oil. Capacitance and tan δ are measured in steps up to the power frequency withstand voltage, which is maintained for one minute. Capacitance and tan δ are also measured at decreasing voltage at the same voltage levels as before the one minute test. Measurements for detection of internal partial discharge (PD measurements) are also made. These measure- ments are carried out at the same time as the power frequency withstand test. PD measurements are made in steps up to the full test voltage and down. It is always demonstrated that the PD value is max. 5 pC at test voltage equal to the rated system voltage. GOB 1050 is also routine tested with a dry lightning impulse voltage withstand test. Type tests have been carried out according to IEC 60137 and IEEE. Type test reports are available on request. Test tap adapter For permanent connection of the test tap to measuring circuits, a test tap adapter is required. Catalogue number 2769 531-D. 6 Electrical data Rating Routine test Design data Highest voltage Phase-to- Dry Wet power Dry Wet for equipment earth voltage lightning frequency 1 min. dry switching switching Type Um Uy impulse AC 50 Hz impulse impulse GOB kV, RMS kV, RMS kV, peak kV, RMS kV, RMS kV, peak kV, peak 250-800 52 52 250 105 120 230 - 250-1250 52 52 250 105 120 230 - 325-800 72.5 72.5 350 140 160 300 - 380-800 100 72.5 380 150 162 330 - 380-1250 100 72.5 380 150 162 330 - 450-800 123 90 450 185 195 410 - 550-800 170 123 550 230 260 470 - 550-1250 170 123 550 230 260 470 - 650-1250 170 145 650 275 300 580 - 750-1250 170 170 750 325 365 670 - 1050-1100 300 173 1050 510 510 810 750 Wet power frequency values apply to both IEC and ANSI requirements. Common specifications Application: Transformers Classification: Oil impregnated paper, capacitance graded, outdoor-immersed bushing Ambient temperature: +40 to -40 °C, minimum value as per temperature class 2 of IEC 60137 Altitude of site: < 1 000 m Level of rain and humidity: 1-2 mm rain/min horizontally and vertically, as per IEC 60060-1 Pollution level: According to specified creepage distance and IEC 60815 1 Type of immersion medium: Transformer oil. Maximum daily mean oil temperature 90 °C. Maximum temporary oil temperature 115 °C Oil level below bushing flange: Maximum 30 mm Max. pressure of medium: 100 kPa overpressure Markings: Conforming to IEC/ IEEE 1) IEC 60815 "Guide for selection of insulators with respect to polluted conditions." 7 Conductor loading The rated currents listed in this catalogue are the standardised values according to IEC 60137 which, with the largest possible conductor, fulfil the temperature rise test. Overloading of bushings If the conductor for the bushing is selected with 120 % of the rated current of the transformer, the bushing is considered to be able to withstand the overload condi- tions stated in IEC 60354 without further clarifications or tests, according to IEC 60137. Short-time current The rated thermal short-time current (Ith) is calculated according to IEC 60137. Read more in product information 2750 515-118. 52-170 kV 300 kV Rated current Permissible current Permissible current of bushing IEC IEEE IEC IEEE A Conductor A A A A 800 Solid rod LF 170 019 800 730 1100, 1250 Solid rod LF 170 052 1250 1200 1100 1000 800, 1100, 1250 Stranded cable 50 mm2 165 150 155 130 800, 1100, 1250 Stranded cable 70 mm2 225 210 190 160 800, 1100, 1250 Stranded cable 95 mm2 300 285 240 195 800, 1100, 1250 Stranded cable 150 mm2 475 415 330 275 1100, 1250 Stranded cable 185 mm2 530 460 380 320 1100, 1250 Stranded cable 285 mm2 665 570 540 450 The GOB bushings fulfil the temperature rise test requirements according to IEC 60137 and IEEE C57.19.00-1991: For draw-lead of stranded copper values are given for 100 mm2. For other areas the short-time current is directly proportional to the area. Rated Short-time current (Ith) Dynamic current Area 1s 2s current (Id) Conductor A mm2 kA, RMS kA, RMS kA, peak Solid rod 800 - 30 21 52 Solid rod 1100/1250 - 70 50 125 Stranded draw-lead 365 100 9.6 6.8 17 8 Dimensions Bushings without oil level gauge Space for current Top Rated trans- Net design Dimensions in mm Type current former mass acc. to GOB A Cat. No. mm kg Fig. 6 L1) L1 1) L2 L3 L4 L5 1) L6 L7 L8 L9 1) 250 800 LF 123 013– – 23 2 998 240 590 65 555 60 – 480 70 15 015– 300 25 2 1258 500 590 555 260 083– 500 27 3 1558 700 690 655 460 250 1250 LF 123 017– – 26 2 1063 255 605 65 580 75 – 480 70 25 019– 300 29 2 1323 515 605 580 260 085– 500 31 3 1623 715 705 680 460 325 800 LF 123 025– – 27 2 1198 295 735 93 700 60 – 625 70 15 027– 300 31 2 1458 555 735 700 260 089– 500 35 3 1758 755 835 800 460 380 800 LF 123 037– – 33 2 1303 345 790 98 755 60 – 680 70 15 039– 300 37 2 1543 585 790 755 240 095– 500 39 3 1843 785 890 855 440 380 1250 LF 123 041– – 37 2 1368 360 805 98 780 75 – 680 70 25 043– 300 39 2 1608 600 805 780 240 097– 500 43 3 1908 800 905 880 440 450 800 LF 123 049– – 42 2 1473 345 960 98 925 60 – 850 70 15 051– 300 45 2 1713 585 960 925 240 053– 500 48 3 2013 785 1060 1025 440 550 800 LF 123 061– 100 70 2 1823 495 1160 60 1125 90 95 1050 60 25 063– 300 73 3 2108 680 1260 1225 280 107– 500 77 3 2308 880 1260 1225 480 550 1250 LF 123 065– 100 105 2 1868 495 1170 68 1145 100 95 1050 60 30 067– 300 109 3 2153 680 1270 1245 280 109– 500 115 3 2353 880 1270 1245 480 650 1250 LF 123 073– 150 116 2 2153 580 1370 60 1345 100 120 1250 60 30 075– 300 122 3 2413 740 1470 1445 280 113– 500 126 3 2613 940 1470 1445 480 750 1250 LF 123 077– 200 180 2 2468 685 1580 70 1555 100 165 1460 60 30 078– 300 190 3 2683 800 1680 1655 280 079– 500 200 3 2883 1000 1680 1655 480 Fig. 4.2. Top design Fig. 4.3 Top design Fig. 4.4 n1 Holes D = 16 Draw lead length = 1) The bushings can be provided with a longer shield L9 + 50 mm, in which case dimensions L, L1 and L5 also increase by 50 mm. Fig. 4.1. GOB design 52 – 170 kV 9 Dimensions are subject to modification without notice. Cantilever load Max. permitted Creeepage distance loading perpendicular 60 s total protected to the terminal Test D1 D2 D3 D4 D5 D6 D7 D8 D10 n1 R1 R2 T mm mm N N 86 22 86 115 88 185 225 230 46 6 8 6 16 1500±50 580 1800 2340 101 34 112 120 101 250 290 245 70 8 12 10 16 1500±50 580 3000 4000 95 22 86 115 96 185 225 230 46 6 8 6 16 1980±50 775 1500 1950 95 22 86 115 96 185 225 240 46 6 8 6 16 2210±70 870 1400 1800 112 34 112 120 112 250 290 245 70 8 12 10 16 2210±70 870 2900 3750 95 22 86 115 96 185 225 245 46 6 8 6 16 2720±80 1060 1150 1500 126 22 118 145 150 250 290 280 50 8 12 12 18 3430±100 1350 1300 1700 160 34 140 175 200 290 335 300 70 12 15 15 20 3430±100 1350 2400 3100 160 34 140 175 200 290 335 305 70 12 15 15 20 4080±110 1620 2600 3380 184 34 140 230 184 290 335 350 70 12 15 15 20 4800±150 1700 2600 3350 Fig. 4.5. Shed form, GOB 52 – 170 kV. Shed form The shed form is of the anti-fog type with alternating long and short sheds. For each pair of sheds the ratio between nominal creepage distance and the axial length is 3.43 and the ratio between protected and nominal creepage distance is 0.40. According to IEC 60815 the creepage factor C.F. is <3.2 and the profile factor P.F. is >1.1. For special customer demands regarding creepage distance, other shed forms may be used. 52 – 170 kV 10 Dimensions Bushings with oil level gauge Fig. 5.2. Top design Fig. 5.3 Top design Space for current Top Rated trans- Net design Dimensions in mm Type current former mass acc. to GOB A Cat. No. mm kg Fig. 7 L 1) L1 1) L2 L3 L4 L5 1) L6 L7 L8 L9 1) 250 800 LF 123 171– – 24 2 1138 240 730 65 695 60 – 480 70 15 173– 300 26 1398 500 260 175– 500 28 1598 700 460 250 1250 LF 123 167– – 28 2 1203 255 745 65 720 75 – 480 70 25 168– 300 30 1463 515 260 169– 500 33 1663 715 460 325 800 LF 123 177– – 28 2 1338 295 875 93 840 60 – 625 70 15 179– 300 32 1598 555 260 181– 500 36 1798 755 460 380 800 LF 123 183– – 34 2 1443 345 930 98 895 60 – 680 70 15 185– 300 38 1683 585 240 187– 500 40 1883 785 440 380 1250 LF 123 101– – 38 2 1508 360 945 98 920 75 – 680 70 25 102– 300 41 1748 600 240 103– 500 44 1948 800 440 450 800 LF 123 145– – 43 2 1613 345 1100 98 1065 60 – 850 70 15 147– 300 46 1853 585 240 149– 500 49 2053 785 440 550 800 LF 123 189– 100 71 2 1963 495 1300 60 1265 90 95 1050 60 25 190– 300 74 2148 680 280 191– 500 78 2348 880 480 550 1250 LF 123 142– 100 106 2 2008 495 1310 68 1285 100 95 1050 60 30 143– 300 110 2193 680 280 144– 500 116 2393 880 480 650 1250 LF 123 192– 150 118 2 2293 580 1510 60 1485 100 120 1250 60 30 193– 300 124 2453 740 280 194– 500 128 2653 940 480 750 1250 LF 123 104– 200 187 3 2718 685 1830 70 1805 100 165 1460 60 30 105– 300 197 2833 800 280 106– 500 207 3033 1000 480 Fig. 5.4 1) The bushings can be provided with a longer shield L9 + 50 mm, in which case dimensions L, L1 and L5 also increase by 50 mm. n1 Holes D = 16 Draw lead length = Fig. 5.1. GOB design. 52 – 170 kV 11 Cantilever load Max. permitted Creepage distance loading perpendicular 60 s total protected to the terminal Test D1 D2 D3 D4 D5 D6 D7 D8 D10 n1 R1 R2 T mm mm N N 86 22 86 140 88 185 225 230 46 6 8 6 16 1500±50 580 1800 2340 101 34 112 140 101 250 290 245 70 8 12 10 16 1500±50 580 3000 4000 95 22 86 140 96 185 225 230 46 6 8 6 16 1980±50 775 1500 1950 95 22 86 140 96 185 225 240 46 6 8 6 16 2210±70 870 1400 1800 112 34 112 140 112 250 290 245 70 8 12 10 16 2210±70 870 2900 3750 95 22 86 140 96 185 225 245 46 6 8 6 16 2720±80 1060 1150 1500 126 22 118 200 150 250 290 280 50 8 12 12 18 3430±100 1350 1300 1700 160 34 140 265 200 290 335 300 70 12 15 15 20 3430±100 1350 2400 3100 160 34 140 265 200 290 335 305 70 12 15 15 20 4080±110 1620 2600 3380 184 34 140 265 184 290 335 350 70 12 15 15 20 4800±150 1700 2600 3350 Dimensions are subject to modification without notice. 52 – 170 kV Fig. 5.5. Shed form, GOB 52 – 170 kV. Shed form The shed form is of the anti-fog type with alternating long and short sheds. For each pair of sheds the ratio between nominal creepage distance and the axial length is 3.43 and the ratio between protected and nominal creepage distance is 0.40. According to IEC 60815 the creepage factor C.F. is <3.2 and the profile factor P.F. is >1.1. For special customer demands regarding creepage distance, other shed forms may be used. 12 Ordering particulars Bushings without oil level gauge When ordering, please state: • Type and catalogue number for bushings. • Catalogue number for inner and outer terminal assembly. • Additional accessories or modifications. • Test required, in addition to the normal routine tests. • Test tap adapter, if required. Note: The catalogue number should have one of the following letters added to it, to indicate the type of insulator and oil end shield: –K Normal oil end shield, brown porcelain –L Normal oil end shield, light grey porcelain –M Longer oil end shield, brown porcelain –N Longer oil end shield, light grey porcelain Bushings Connection details Inner terminal stud: Cat. No. LF 170 Space for Bushing Rated current tube For crimping or brazing For brazing Type current transformer (See fig.) Conductor area Conductor area Undrilled with GOB A Cat. No. mm D2, mm 50 mm2 70 mm2 95 mm2 <150 mm2 <285 mm2 pilot hole 250 800 LF 123 013– – 22 010-M 010-N 010-L 011-S – 011-U 015– 300 083– 500 250 1250 LF 123 017– – 34 – – – – 011-T 011-V 019– 300 085– 500 325 800 LF 123 025– – 22 010-M 010-N 010-L 011-S – 011-U 027– 300 089– 500 380 800 LF 123 037– – 22 010-M 010-N 010-L 011-S – 011-U 039– 300 095– 500 380 1250 LF 123 041– – 34 – – – – 011-T 011-V 043– 300 097– 500 450 800 LF 123 049– – 22 010-M 010-N 010-L 011-S – 011-U 051– 300 053– 500 550 800 LF 123 061– 100 22 010-M 010-N 010-L 011-S – 011-U 063– 300 107– 500 550 1250 LF 123 065– 100 34 – – – – 011-T 011-V 067– 300 109– 500 650 1250 LF 123 073– 150 34 – – – – 011-T 011-V 075– 300 113– 500 750 1250 LF 123 077– 200 34 – – – – 011-T 011-V 078– 300 079– 500 Oil end shield 52–170 kV 13 Outer terminal assembly: Cat. No. LF 170 Stud with O-ring Separate terminal Solid rod conductor Arcing and locking pin plate with bolts Cat. No. LF 170 horns Cat. No. Aluminium Copper alloy Aluminium Tin-plated copper Alt. 1 Alt. 2 Mass kg LF 170 001-A 002-A 014-A 021-A 019 -A – 2.6 004 -A -D 019 -B 3.3 -A -E -C 4.2 -B 001-B 002-B 014-A 021-A 052 -A – 6.8 004 -A -D 052 -B 8.4 -A -E -C 10.6 -B 001-A 002-A 014-A 021-A 019 -F – 3.1 004 -A -K 019 -G 3.9 -A -L -H 4.7 -B 001-A 002-A 014-A 021-A 019 -M – 3.5 004 -A -R 019 -N 4.2 -A -S -P 5.0 -B 001-B 002-B 014-A 021-A 052 -V – 8.6 004 -B -Z 052 -X 10.4 -B -AA -Y 12.7 -B 001-A 002-A 014-A 021-A 019 -BL – 4.0 004 -B -BM 019 -BN 4.7 -B -BP -BR 5.5 -C 001-A 002-A 014-A 021-A 019 -T – 4.9 004 -B -X 019 -U 5.7 -C -Y -V 6.3 -C 001-B 002-B 014-A 021-A 052 -AM – 12.0 004 -B -AN 052 -AP 14.1 -C -AR -AS 15.5 -C 001-B 002-B 014-A 021-A 052 -F – 14.0 005 -A -K 052 -G 15.9 -B -L -H 17.5 -B 001-B 002-B 014-A 021-A 052 -M – 16.3 005 -B -R 052 -N 18.0 -E -S -P 19.5 -E LF 170 052- 1250 A LF 170 019- 800 A 52–170 kV 14 Ordering particulars Bushings with oil level gauge Bushings Connection details Inner terminal stud: Cat. No. LF 170 Space for Bushing Rated current tube For crimping or brazing For brazing Type current transformer (See fig.) Conductor area Conductor area Undrilled with GOB A Cat. No. mm D2, mm 50 mm2 70 mm2 95 mm2 <150 mm2 <285 mm2 pilot hole 250 800 LF 123 171– – 22 010-M 010-N 010-L 011-S – 011-U 173– 300 175– 500 250 1250 LF 123 167– – 34 – – – – 011-T 011-V 168– 300 169– 500 325 800 LF 123 177– – 22 010-M 010-N 010-L 011-S – 011-U 179– 300 181– 500 380 800 LF 123 183– – 22 010-M 010-N 010-L 011-S – 011-U 185– 300 187– 500 380 1250 LF 123 101– – 34 – – – – 011-T 011-V 102– 300 103– 500 450 800 LF 123 145– – 22 010-M 010-N 010-L 011-S – 011-U 147– 300 149– 500 550 800 LF 123 189– 100 22 010-M 010-N 010-L 011-S – 011-U 190– 300 191– 500 550 1250 LF 123 142– 100 34 – – – – 011-T 011-V 143– 300 144– 500 650 1250 LF 123 192– 150 34 – – – – 011-T 011-V 193– 300 194– 500 750 1250 LF 123 104– 200 34 – – – – 011-T 011-V 105– 300 106– 500 When ordering, please state: • Type and catalogue number for bushings. • Catalogue number for inner and outer terminal assembly. • Additional accessories or modifications. • Test required, in addition to the normal routine tests. • Test tap adapter, if required. Note: The catalogue number should have one of the following letters added to it, to indicate the type of insulator and oil end shield: –K Normal oil end shield, brown porcelain –L Normal oil end shield, light grey porcelain –M Longer oil end shield, brown porcelain –N Longer oil end shield, light gre