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OIP Transformer Outdoor Bushings Type COT(C) 125…COT (C) 1800 24kV to 550kV up to 5000A IEC 60137-2008 Features If you need any transformer bushing proven in operation conditions around the world, Trench has it ! experience in manufacturing of bushings for more than 100 years available with porcelain or composite insulator on air side capacitive fine graded oilpaper insulation with long experience inclination in service up to 30° from vertical. For COT(C) 125 and COT(C) 170 even horizontal operation is possible computer optimized electrical field distribution proven high electrical withstand against transient or impulse stresses excellent long term stability due to extremely low partial discharge and power loss factor horizontal transport for all types possible tan α and PD-values more than twice as good as requested by IEC 60137 oil immersed part covered by epoxy resin tube providing high impact resistance current rating can easily be increased by exchanging the cable bolt with a removable split conductor on existing bushing electrode embedded in the lower epoxy resin part - avoids external shielding - reduces distance to ground - lower transformer costs To preserve our environment the free oil volume in COT-bushings is minimized porcelain cemented into flange provides higher mechanical strength than level II of IEC Certified ISO 9001 Transformer Bushings Type COT(C) 125 to COT(C) 1800 Substitute for E 322.81&E 322.91 Page 2 / 24 40497230_00 Cut view General design Design 10 1 2 1 Top terminal Terminal (Aluminium or Copper) for connection of overhead lines or bus bars and arcing horns. Trench design provides a maintenance free termination and ensures that the connection will not become loose in service. 2 Assembly The whole bushing is tightened together by the central tube or conductor. 3 Head Al-casted head with oil expansion chamber and oil level indicator. The chamber is hermetically sealed against several environmental conditions. 4 Oil filling COT bushings are filled with dried, degassed insulating mineral oil. 5 Insulator Porcelain insulator made of high grade electrotechnical porcelain according to IEC 60815. The insulator is connected to the mounting flange using cement and sealed with O-ring gasket. instead of porcelain a composite insulator is also available. Substitute for E 322.81&E 322.91 6 3 Active part 4 The active part is made of oilimpregnated wide band paper with layers of aluminium foil to control the electrical field radially and axially. Depending on the current rating, the paper and foil are wound on either a central tube or solid conductor 7 5 Flange Mounting flange with integrated test tap made of corrosion free aluminium alloy, machined to ensure an excellent seal between the bushing and the transformer. 8 6 CT-Pocket If current transformers are required on the bushing, the ground sleeve can be extended. 9 Oil side end The insulator on the oil side is made of an epoxy resin tube. It is designed to stay installed during the in-tank drying process of the transformer and can withstand temperatures up to 130°C. 10 7 8 End-shielding For voltages starting between 52kV & 300kV a special aluminium electrode is casted into the end of the epoxy resin tube. This end shielding controls the electrical field strength in this area to ground. Page 3 / 24 9 10 40497230_00 One of several TRENCH winding machines Test tap for C and tan Substitute for E 322.81&E 322.91 Page 4 / 24 measurement 40497230_00 High voltage test laboratory Epoxy insulator with embedded end shield Cut view Insulation See page 16 Cable Substitute for E 322.81&E 322.91 Page 5 / 24 40497230_00 08 09 10 Highest voltage (Um) Maximum phase to earth voltage Bushing Dry Power frequency voltage withstand (AC) Transformer Power frequency voltage withstand (AC) Lightning Impulse withstand voltage (BIL) Switching Impulse wet (SIL): 250/2500µs Rated current (Ir) Connection to Transformer Cable cross section Conductor kV kV kV kV kV kV A 36 14 21 55 77 50 125 70 170 / / 800 cable ) 1250 rem.Co-cond. ) 35 1600 fixed Co-cond. - 2500 fixed Co-cond. - 3150 fixed Co-cond. 800 52 30 105 95 250 / COT 450 72,5 100 42 58 155 205 Comments related to columns 1…33: 1 09: ) Class F insulation 140 325 185 450 / / kg N 235 600 22 2000 22 2000 28 2000 29 2000 32 2000 - 36 3150 *1116 31 2000 400 *1116 31 2000 400 1 cable ) 2 340 rem.Co-cond. ) 35 *1116 38 2000 1600 fixed Co-cond. - *1116 44 2000 2500 fixed Co-cond. - *1116 49 2000 3150 fixed Co-cond. - *1116 53 3150 1300 26 2000 26 2000 35 2000 36 2000 54 3150 75 4000 31 2000 31 2000 800 cable 400 1 cable ) 400 2 1250 rem.Co-cond. ) 35 1600 fixed Co-cond. - 2500 fixed Co-cond. - 3150 fixed Co-cond. - 800 cable 400 1 1000 cable ) 1250 rem.Co-cond. ) 35 1600 fixed Co-cond. - 2500 fixed Co-cond. - 3150 fixed Co-cond. 800 465 600 1820 400 2 cable 400 1 820 2540 400 40 2000 44 2000 62 3150 88 4000 40 2000 40 2000 52 2000 1000 cable ) 1250 rem.Co-cond. ) 35 1600 fixed Co-cond. - 56 2000 2500 fixed Co-cond. - 80 3150 3150 fixed Co-cond. - 106 4000 2 04: Bushings test voltage at 50Hz 60 sec. 2 ) Removable solid rod copper conductor 11: Extension for current transformer (other extensions on request) Substitute for E 322.81&E 322.91 mm 1250 1000 COT 325 cable 15 mm 400 2 14 mm 400 1 1000 1000 COT 250 cable 13 / kV COT 170 24 12 25 mm 25mm/kV COT 125 mm² mm 11 Cantilever test load (min) 07 Mass Approx. 06 Standard creepage distance 05 25mm/kV 04 AD Arcing distance (min.) 03 CT Space L4 see fig.3 page 12 02 Standard: 0, 300, 500 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 01 Type N° Type COT 125……450 Connection system see pages 17 to 23 13: * 31mm/kV in standard Page 6 / 24 40497230_00 Type COT 125……450 Rated current (Ir) 08 16 17 18 19 20 21 22 24 25 26 27 28 29 30 31 32 33 L L1 L2 L3 L6 L7 D D2 D3 D4 D5 D6 D7 min øt n e see fig. A 800 1000 1250 1600 2500 3150 800 1000 1250 1600 2500 3150 800 1000 1250 1600 2500 3150 800 1000 1250 1600 2500 3150 800 1000 1250 1600 2500 3150 12, 13: 15: mm 761 761 140 140 621 621 452 452 761 140 621 729 140 589 729 140 729 140 895 895 mm 80 80 60 60 80 80 184 184 240 240 210 210 190 190 30 30 40 40 24 24 4 4 12 12 19 19 - 80 60 80 184 240 210 190 30 - 24 4 12 20 - 125 60 80 184 240 210 190 40 - 24 4 12 21 589 - 125 60 80 184 240 210 190 40 - 24 4 12 21 589 - 125 60 80 184 240 210 190 40 - 24 4 12 21 169 169 726 726 557 557 80 80 60 60 80 80 184 184 240 240 230 230 190 190 30 30 40 40 24 24 4 4 12 12 19 19 895 169 726 - 80 60 80 184 240 230 190 30 - 24 4 12 20 863 169 694 - 125 60 80 184 240 230 190 40 - 24 4 12 21 863 169 694 - 125 60 80 184 240 230 190 40 - 24 4 12 21 863 169 694 - 125 60 80 184 240 230 190 40 - 24 4 12 21 1090 1090 140 140 950 950 760 760 80 80 100 100 100 100 185 185 225 225 200 200 170 170 30 30 35 35 16 16 6 6 14 14 22 22 1090 140 950 - 80 100 100 185 225 200 170 30 - 16 6 14 23 1135 140 995 - 125 100 100 185 225 200 170 40 - 16 6 14 24 1095 140 955 - 125 110 120 200 240 231 170 60 - 22 6 15 25 1105 140 965 - 125 110 130 290 335 242 170 60 - 16 12 16 26 1210 175 1035 845 80 100 100 185 225 210 170 30 35 16 6 14 22 1210 1210 175 175 1035 1035 845 - 80 80 100 100 100 100 185 185 225 225 210 210 170 170 30 30 35 - 16 16 6 6 14 14 22 23 1255 175 1080 - 125 100 100 185 225 210 170 40 - 16 6 14 24 1275 175 1100 - 125 110 120 200 240 231 170 60 - 22 6 15 25 1285 175 1110 - 125 110 130 290 335 242 170 60 - 16 12 16 26 1503 1503 230 230 1273 1273 1085 1085 80 80 100 100 100 100 185 185 225 225 210 210 170 170 30 30 35 35 16 16 6 6 14 14 22 22 1503 230 1273 - 80 100 100 185 225 210 170 30 - 16 6 14 23 1548 230 1318 - 125 100 100 185 225 210 170 40 - 16 6 14 24 1543 230 1313 - 125 110 120 200 240 231 170 60 - 22 6 15 25 1553 230 1323 - 125 110 130 290 335 242 170 60 - 16 12 16 26 Brown glazed porcelain, other colours and Other creepage distances upon request According to IEC 137 level II or better Substitute for E 322.81&E 322.91 16, 17: 24, 25, 29, 32: L1 depends on L4. The values in the table are valid for L4= 0mm. If L4>0mm add L4 to L1 and L. Other dimensions on request. Page 7 / 24 40497230_00 255 230 550 kV 10 Rated current (Ir) Connection to Transformer Cable cross section Conductor mm² mm A / 800 cable 11 13 14 15 mm mm mm kg N 1050 3100 62 3150 400 1 12 Cantilever test load (min.) kV 09 Mass Approx. 71 kV 08 Standard creepage distance 123 kV 07 AD Arcing distance (min.) COT 550 06 Switching Impulse wet (SIL): 250/2500µs Maximum phase to earth voltage kV 05 Lightning Impulse withstand voltage (BIL) Highest voltage (Um) kV 04 Transformer Power frequency voltage withstand (AC) 03 Bushing Dry Power frequency voltage withstand (AC) 02 CT Space L4 see fig.3 page 12 01 01 Type N° Type COT 550……1050 02 1000 cable ) 400 62 3150 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 1250 rem.Co-cond.2) 35 74 3150 1600 fixed Co-cond. - 2500 fixed Co-cond. - 3150 fixed Co-cond. COT 750 170 84 98 305 355 275 325 650 / 750 800 COT 1050 245 300 142 173 505 560 460 510 1050 1050 400 1000 1 cable ) 400 1250 rem.Co-cond.2) 35 1600 fixed Co-cond. - 2500 fixed Co-cond. - 3150 fixed Co-cond. - / 800 1000 COT 1050 - cable cable 400 1 cable ) 500 2 1250 rem.Co-cond. ) 35 1600 fixed Co-cond. - 2500 fixed Co-cond. - 3150 fixed Co-cond. - 750 800 cable 400 1 1250 1460 4000 173 4000 81 3150 81 3150 3625 98 3150 101 3150 190 4000 198 4000 92 4000 92 4000 111 4000 117 4000 315 5000 223 5000 236 4000 4250 *5270 2150 3150 25mm / kV 145 Standard: 0, 300, 500 COT 650 79 165 6125 750 1000 cable ) 500 236 4000 750 1250 rem.Co-cond.2) 38 266 4000 750 1600 fixed Co-cond. - 285 4000 750 2500 fixed Co-cond. - 328 5000 750 3150 fixed Co-cond. 332 5000 850 1000 Cable 350 5000 850 1600 fixed Co-cond. - 440 5000 850 2500 fixed Co-cond. - 445 5000 630 2400 7500 Comments related to columns 1…33: 04: Bushings test voltage at 50Hz 60 sec. 09: 1) Class F insulation 11: Extension for current transformer (other extensions on request) 2 ) Removable solid rod copper conductor Connection system see pages 17 to 23 13: * 31mm/kV in standard Substitute for E 322.81&E 322.91 Page 8 / 24 40497230_00 Type COT 550……1050 Rated current (Ir) 08 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 L L1 L2 L3 L6 L7 D D1 D2 D3 D4 D5 D6 D7 min øt n e see fig. A mm 800 1000 1250 1600 2500 3150 1805 1805 310 310 1495 1495 1306 1306 1805 310 1495 1850 310 1540 2089 310 2052 310 800 1000 1250 1600 2500 3150 2055 2055 800 1000 1250 1600 2500 3150 mm 80 80 110 110 120 120 - 250 250 290 290 231 231 170 170 30 30 35 35 16 16 8 8 15 15 27 27 - 80 110 120 - 250 290 231 170 30 - 16 8 15 28 - 125 110 120 - 250 290 231 170 40 - 16 8 15 29 1779 - 125 195 175 - 290 290 295 300 60 - 20 12 20 30 1742 - 125 195 175 - 400 450 295 300 60 - 22 12 22 31 360 360 1695 1695 1506 1506 80 80 110 110 130 130 - 290 290 335 335 242 242 170 170 30 30 35 35 16 16 12 12 16 16 27 27 2055 360 1695 - 80 110 130 - 290 335 242 170 30 - 16 12 16 28 2100 360 1740 - 125 110 130 - 290 335 242 170 40 - 16 12 16 29 2339 360 1979 - 125 195 175 - 290 335 295 300 60 - 20 12 20 30 2302 360 1942 - 125 195 175 - 400 450 295 300 60 - 22 12 22 31 2325 2325 420 420 1905 1905 1716 1716 80 80 110 110 130 130 - 290 290 335 335 242 242 170 170 30 30 35 35 16 16 12 12 16 16 27 27 2325 420 1905 - 80 110 130 - 290 335 242 170 30 - 16 12 16 28 2370 420 1950 - 125 110 130 - 290 335 242 170 40 - 16 12 16 29 2609 420 2189 - 125 195 175 - 290 335 335 300 60 - 20 12 20 30 2572 420 2152 - 125 195 175 - 400 450 295 300 60 - 22 12 22 31 800 1000 1250 1600 2500 3150 3518 684 2834 2500 80 195 175 - 400 450 295 300 30 40 22 12 22 32 3518 3518 684 684 2834 2834 2500 - 80 80 195 195 175 175 - 400 400 450 450 295 295 300 300 30 30 40 - 22 22 12 12 22 22 32 33 3563 684 2879 - 125 195 175 - 400 450 295 300 40 - 22 12 22 34 3563 684 2879 - 125 195 200 - 400 450 340 300 60 - 22 12 22 35 3407 684 2842 - 125 195 200 - 400 450 340 300 60 - 22 12 22 36 1000 1600 2500 3813 3813 684 684 3129 3129 2750 - 80 125 195 195 200 200 - 400 400 450 450 350 350 300 300 40 40 55 - 22 22 12 12 22 22 37 38 3742 650 3092 - 125 195 200 - 400 450 350 300 50 - 22 12 22 39 12, 13: Brown glazed porcelain, other colours and Other creepage distances upon request According to IEC 137 level II or better 15: Substitute for E 322.81&E 322.91 16, 17: 24, 25, 29, 32: L1 depends on L4. The values in the table are valid for L4= 0mm. If L4>0mm add L4 to L1 and L. Other dimensions on request. Page 9 / 24 40497230_00 09 10 Cable cross section Conductor kV kV A 362 209 560 510 1175 950 1000 cable 02 1600 03 15 mm kg N 630 2800 9115 480 5000 Fixed cond. - 2800 2500 Fixed cond. - 2800 1000 cable 630 2800 05 1600 Fixed cond. - 2800 06 2500 Fixed cond. - 2800 1000 cable 630 3300 08 1600 Fixed cond. - 09 2500 Fixed cond. - 1000 cable 11 1600 Fixed cond. - 12 2500 Fixed cond. - 1000 cable 14 1600 15 04 07 10 13 COT 1175 COT 1300 COT 1425 COT 1550 420 550 243 318 695 750 630 680 1425 1550 1050 1175 5000 530 5000 560 5000 *13750 865 5000 3300 *13750 930 5000 3300 *13750 990 5000 3800 14350 940 5000 1000 5000 1030 5000 980 5000 1060 5000 1100 5000 1050 5000 1150 5000 1200 5000 3800 3800 Fixed cond. - 3800 1000 cable 630 4200 17 1600 Fixed cond. - 4200 18 2500 Fixed cond. - 4200 1800 1175 630 500 2500 790 1675 950 3800 870 680 1300 - 318 750 570 Fixed cond. 550 318 625 3800 COT 1800 550 209 5000 630 16 COT 1675 362 5000 540 9115 25 mm / kV 01 25m m/kV mm mm² mm Standard: 0, 300, 500 mm N° Cantilever test load (min) kV 14 Mass Approx. kV 13 Standard creepage distance kV 12 AD Arcing distance (min.) kV 11 CT Space L4 see fig.3 page 12 Rated current (Ir) 08 Switching Impulse wet (SIL): 250/2500µs 07 Lightning Impulse withstand voltage (BIL) 06 Connection to Transformer 05 Transformer Power frequency voltage withstand (AC) 04 Bushing Dry Power frequency voltage withstand (AC) 03 Maximum phase to earth voltage 02 Highest voltage (Um) 01 Type Type COT 1175……1800 14350 14350 Comments related to columns 1…33: 04: Bushings test voltage at 50Hz 60 sec. 11: Extension for current transformer (other extensions on request) Connection system see pages 17 to 23 13: * 31mm/kV in standard for Type COT 1425 Substitute for E 322.81&E 322.91 Page 10 / 24 40497230_00 Type COT 1175……1800 Rated current (Ir) 08 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 L L1 L2 L3 L6 L7 D D1 D2 D3 D4 D5 D6 D7 øt n e see fig. A mm mm 1000 4270 720 3550 3240 125 250 235 - 400 450 390 330 40 55 22 12 22 40 1600 4230 720 3510 - 125 250 235 - 400 450 390 330 40 - 22 12 22 41 2500 4230 720 3510 - 125 250 235 - 400 450 390 330 40 - 22 12 22 41 1000 4270 720 3550 3240 125 250 235 - 400 450 390 330 40 55 22 12 22 40 1600 4230 720 3510 - 125 250 235 - 400 450 390 330 40 - 22 12 22 41 2500 4230 720 3510 - 125 250 235 - 400 450 390 330 40 - 22 12 22 41 1000 5055 820 4235 3995 125 280 291 380 530 590 477 400 40 68 23 12 25 42 1600 4965 820 4145 - 125 280 291 380 530 590 477 400 40 - 23 12 25 43 2500 4965 820 4145 - 125 280 291 380 530 590 477 400 50 - 23 12 25 43 1000 5790 1055 4735 4495 125 280 291 380 530 590 455 500 40 68 23 12 25 42 1600 5700 1055 4645 - 125 280 291 380 530 590 455 500 40 - 23 12 25 43 2500 5700 1055 4645 - 125 280 291 380 530 590 455 500 50 - 23 12 25 43 1000 5935 1200 4735 4495 125 280 291 380 530 590 455 500 40 68 23 12 25 42 1600 5845 1200 4645 - 125 280 291 380 530 590 455 500 40 - 23 12 25 43 2500 5845 1200 4645 - 125 280 291 380 530 590 455 500 50 - 23 12 25 43 1000 6345 1200 5145 4895 125 280 291 380 530 590 455 500 40 68 23 12 25 42 1600 6245 1200 5045 - 125 280 291 380 530 590 455 500 40 - 23 12 25 43 2500 6255 1200 5055 - 125 280 291 380 530 590 455 500 50 - 23 12 25 43 12, 13: Brown glazed porcelain, other colours and Other creepage distances upon request According to IEC 137 level II or better 15: Substitute for E 322.81&E 322.91 16, 17: 24, 25, 29, 32: L1 depends on L4. The values in the table are valid for L4= 0mm. If L4>0mm add L4 to L1 and L. Other dimensions on request. Page 11 / 24 40497230_00 Dimensional Drawing D6 View A L6 D5 L3 L2 AD Fig. 1 Fig. 2 L D4 COT 550…1050 (Um =245kV), 3150 A COT 1050 (Um=300kV), 2500A COT 1175 … 1800 e L7 L4 D1 Only for COT ≥ 420 kV L1 ≥ 30 L1 D7 Fig. 3 Substitute for E 322.81&E 322.91 D Fig. 4 Page 12 / 24 Fig. 5 40497230_00 Porcelain and composite insulator Porcelain Insulator (Type COT) Brown color (RAL 8016) Composite Insulator (Type COTC) Gray color (ANSI gray N70) D4 Alternate sheds (ANSI gray N70) D4 Helicoil sheds (ANSI gray N70) D4 D4 All COT(C) can be equipped with silicone rubber insulators upon request without affecting dimensions except D4 Substitute for E 322.81&E 322.91 Page 13 / 24 40497230_00 Standard Oil level indicator COT 125, COT 170 Oil level indicator COT 250 … COT 1050 Ø20 Ø60 Fig. 6 Fig. 7 Test tap (2kV) Air escape screw O-ring gasket 22 6 Multiple spring contact Flat gasket Fig. 8 Substitute for E 322.81&E 322.91 Fig. 9 Page 14 / 24 40497230_00 Options Magnetic oil level indicator (Ø95) COT 250 … COT 1800 Arcing horns Type S min max mm COT 125 - - COT 170 - - COT 250 220 270 COT 325 300 390 COT 450 430 520 COT 550 420 650 COT 650 500 750 COT 750 500 850 COT 1050 750 1200 Fig. 10 Fig. 11 Voltage tap according to ANSI/IEEE (20kV) Oil sampling device Valve Multiple spring contact Fig. 12 Substitute for E 322.81&E 322.91 S Fig. 13 Page 15 / 24 40497230_00 Recommendations for lead out arrangement Embedded shield External shield These bushings are equipped on the lower end with a cone shaped epoxy resin tube and an embedded electrode. Therefore, additional barriers or electrodes may be omitted and distance to ground is reduced R1 R S Oil conditions: Mineral oil with less than 10ppm water content and dielectric strength higher than 60kV (acc. to IEC 60156) Fig. 14 Fig. 15 Draw lead insulation COT 550…750 Cable insulation and distance to grounded parts COT 1050 Ø40 Ø35,7 Type Min. insulation thickness S Min. distance to grounded parts R R1 mm 28 50 S 15° 30° S Ø80 (Um=245kV) Ø94 (Um=300kV) Fig. 16 Substitute for E 322.81&E 322.91 COT 125 5 65 - COT 170 5 75 - COT 250 10 85 - COT 325 10 120 - COT 450 12 135 - COT 550 12 145 250 COT 650 15 180 275 COT 750 15 225 300 COT 1050 20 300 375 COT 1175 to COT 1800 - - See spec 40497124 Fig. 17 Page 16 / 24 40497230_00 Removable split conductor COT 125 … COT 1175 1250 A Cable bolt Removable split conductor 30 3 fixing screws Position of standard split conductor. Others positions on request 30 Ø29 Fig. 18 Oil side end COT 125, COT 170 1600 … 3150A … 1250A … 1000A Ø40 Ø40 30 Ø29 125 8 Conductor Ø35 Ø80 Ø80 Cable Ø40 Fig. 19 Substitute for E 322.81&E 322.91 Removable copper conductor Page 17 / 24 Ø80 Fig. 20 Fixed copper-conductor Fig. 21 40497230_00 Oil side end COT 250 … COT 450 … 1600 A … 1250A … 1000A 30 Ø29 8 90 Conductor Ø35 Ø35,7 Ø35 Ø80 Cable Ø80 Removable copper conductor Fig. 22 Ø80 Fig. 23 Fixed copper-conductor … 3150A … 2500A 125 125 Ø40 Ø40 Ø94 Ø104 Fixed copper-conductor Substitute for E 322.81&E 322.91 Fig. 24 Fixed copper-conductor Fig. 25 Page 18 / 24 Fig. 26 40497230_00 Oil side end COT 550 … COT 750 … 1600 A … 1250A … 1000A 30 41 28 Ø29 15° 90 Conductor Ø35 Ø35,7 Ø35 Ø68 Cable Ø68 Ø68 Removable copper conductor Fig. 27 Fig. 28 Fixed copper-conductor Fig. 29 … 3150A … 2500A 15° 22,5 125 125 150 195 Ø40 Ø86 Ø40 Ø114 Ø160 Ø240 Fixed copper-conductor Substitute for E 322.81&E 322.91 Fig. 30 Fixed copper-conductor with removable screwed shield Fig. 31 Page 19 / 24 40497230_00 Oil side end COT 1050, Um = 245 kV … 1600 A … 1250A … 1000A 30° 30 14 78 50 Ø29 Ø40 90 25° Conductor Ø38 Ø80 Ø119 Ø119 Ø119 Cable Ø35 Removable copper conductor Fig. 32 Fixed copper-conductor Fig. 33 Fig. 34 … 3150A … 2500A 230 125 125 170 Ø40 Ø40 Ø95 Ø180 Ø260 Ø134 Fixed copper-conductor Substitute for E 322.81&E 322.91 Fig. 35 Fixed copper-conductor with removable screwed shield Fig. 36 Page 20 / 24 40497230_00 Oil side end COT 1050, Um = 300 kV … 1000A … 1600A 30° 14 50 Ø55 90 25° Ø35 Ø95 Ø95 Ø134 Ø134 Cable Fixed copper-conductor Fig. 37 Fig. 38 … 2500A 230 125 170 Ø40 Ø180 Ø260 Fixed copper-conductor with removable screwed shield Substitute for E 322.81&E 322.91 Page 21 / 24 Fig. 39 40497230_00 Oil side end COT 1175 … 1300 … 1000A … 1600A 120 80 Ø55 Ø110 Ø125 Ø190 Cable with fixed shield Oil side connector according to customer request Fixed conductor Fig. 40 Fig. 41 COT 1425 … 1800 … 1000A … 1600A Ø68 280 210 Ø160 Ø210 Ø160 Ø330 Cable with fixed shield Substitute for E 322.81&E 322.91 Oil side connector according to customer request Fixed conductor Fig. 42 Page 22 / 24 Fig. 43 40497230_00 Oil side end : External shields FIXED SHIELD SHIELD WITH BAYONET SYSTEM ØD 3 x M6 depth 15mm equidistant on a drilling diameter D Fig. 44 SCREWED SHIELD A Detail A Connection according to customer drawing Fig. 45 Substitute for E 322.81&E 322.91 Fig. 46 Page 23 / 24 40497230_00 Product Range Quality Bushings for At Trench quality is a way of life. Trench quality assurance complies with the most stringent standard of ISO 9001. • Power Transformers up to 550 kV, 5000A • High Current Application up to 52 kV, 40000 A Certified by AFAQ since 1994 • Transformer to SF6 connection up to 550kV • Gas-insulated Switchgear (GIS) up to 800 kV, 6000A • Generators up to 36 kV, 50000 A • Railways • Buildings , Wall up to 245 kV, 5000 A • Bushings according Standard IEC 60137 • Bushings according to customer’s special specification Trench® China MWB (Shanghai) Co., Ltd No. 3658, Jiancheng Road Minhang, Shanghai Peoples Republic of China 200245 Phone : +86-21-54720088 Fax : +86-21-54723118 Trench® Limited Bushing Division 432 Monarch Avenue Ajax, Ontario Canada L1S 2G7 Phone : +905-426-2665 Fax : +905-426-2671 Trench® France SAS 16, rue du Général Cassagnou B.P.80070 F-68302 Saint-Louis Cedex France Phone : +33 3 89 70 23 23 Fax : +33 3 89 70 23 59 imprimerie de saint-louis troendlé bieler substitute for E 322.81&E 322.91 40497230_00 www.trenchgroup.com Sales-bushing.fr@trench-group.com All rights reserved. Brands and trademarks used in this document are the property of Trench® Subject to change without prior notice. The information in this document contains general descriptions of the technical options which are not necessarily available in every single case. The required features must therefore be defined in each individual case when concluding the contract.
