OIP Transformer Outdoor Bushings Type COT(C) 125 COT (C) kV to 550kV up to 5000A IEC

Transcription

1 OIP Transformer Outdoor Bushings Type COT(C) 125 COT (C) kV to 550kV up to 5000A IEC

2 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 capacitive fine graded oilpaper insulation with long experience 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 oil immersed part covered by epoxy resin tube providing high impact resistance available with porcelain or composite insulator on air side inclination in service up to 30 from vertical. For COT(C) 125 and COT(C) 170 even horizontal operation is possible horizontal transport for all types possible tan α and PD-values more than twice as good as requested by IEC 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 Transformer Bushings Type COT(C) 125 to COT(C) 1800 porcelain cemented into flange provides higher mechanical strength than level II of IEC Certified ISO 9001 Substitute for E &E Page 2 / _ _00

3 Design 10 Cut view General design 1 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 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. 6 Active part 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 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 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 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 Substitute for E &E Page 3 / _ _01

4 One of several TRENCH winding machines Test tap for C and tan measurement Substitute for E &E Page 4 / _ _00

5 High voltage test laboratory Epoxy insulator with embedded end shield Cut view Insulation See page 16 Cable Substitute for E &E Page 5 / _ _01

6 Type COT Type COT N N Type Type Highest voltage (Um) Highest voltage (Um) Maximum phase to earth voltage Maximum phase to earth voltage Bushing Dry Power frequency voltage Bushing withstand Dry (AC) Power frequency voltage withstand (AC) Transformer Power frequency voltage Transformer withstand (AC) Power frequency voltage Lightning Impulse withstand voltage Lightning (BIL) Impulse withstand voltage (BIL) Switching Impulse wet (SIL): 250/2500µs withstand (AC) Switching Impulse wet (SIL): 250/2500µs Rated current (Ir) mm² kv kv kv kv kv kv A mm mm mm kg N mm mm² kv kv kv kv kv kv A mm mm mm kg N mm 01 COT / 800 cable COT / 800 cable 1000 cable ) rem.co-cond. cable 1 ) 2 ) fixed rem.co-cond. 2 ) fixed fixed Co-cond. Co-cond fixed fixed Co-cond. Co-cond COT / cable fixed Co-cond * COT / cable cable 1 ) *1116 * rem.co-cond. cable 1 ) 2 ) *1116 * fixed rem.co-cond. 2 ) - 35 *1116 * fixed fixed Co-cond. Co-cond. - - *1116 * fixed fixed Co-cond. Co-cond. - - *1116 * COT / 800 cable fixed Co-cond. - * cable 1 ) COT / 800 cable rem.co-cond. 2 ) cable 1 ) fixed Co-cond rem.co-cond. 2 ) fixed Co-cond fixed Co-cond fixed Co-cond fixed Co-cond COT , / 800 cable fixed 1000 cable 1 Co-cond ) COT , / rem.co-cond. cable 2 ) fixed cable Co-cond. ) fixed rem.co-cond. 2 ) fixed fixed Co-cond. Co-cond COT / cable fixed Co-cond cable fixed 1 ) Co-cond COT / rem.co-cond. cable 2 ) fixed cable Co-cond. ) fixed rem.co-cond. 2 ) fixed fixed Co-cond. Co-cond Comments 29 related to columns 1 33: 04: Bushings test voltage 2500 at 50Hz fixed 60 sec. Co-cond : 30 1 ) Class F insulation 2 ) Removable solid rod copper 3150 conductor fixed Co-cond. Connection - system see pages 17 to Connection to Transformer Cable cross section Conductor 11: Extension for current transformer (other extensions on request) 13: * 31mm/kV in standard Comments related to columns 1 33: 04: Bushings test voltage at 50Hz 60 sec. Rated current (Ir) Connection to Transformer CT Space L4 see fig.3 page 12 Cable cross section Conductor Standard: 0, 300, 500 CT AD Space Arcing L4 distance see fig.3 (min.) page 12 Standard: 0, 300, 500 AD Arcing distance (min.) Standard creepage distance Standard creepage distance Mass Approx. 25 mm / kv 25mm/kV 25 25mm/kV / kv 25mm/kV Mass Cantilever Approx. test load (min) 25mm/kV Cantilever test load (min) 09: 1 ) Class F insulation 2 ) Removable solid rod copper conductor Connection system see pages 17 to 23 11: Extension for current transformer (other extensions on request) 13: * 31mm/kV in standard Substitute for E &E Page 6 / _ _00

7 Type COT Type COT Rated current (Ir) Rated current (Ir) D 7 see D L L 1 L 2 L D 2 D 3 D 4 D 5 D 6 min 7 øt n e fig. L L 1 L 2 L 3 L 6 L 7 D D 2 D 3 D 4 D 5 D 6 min øt n e A A mm mm mm mm , 13: 1543 Brown glazed 230 porcelain, 1313 other colours - and , 17: L 1 depends 240 on 231 L 4. The values 170 in the 60 table are - valid Other creepage 230 distances 1323 upon request for L 4= 335 0mm. If 242 L 4>0mm 170 add L 4 to 60 L 1 and L. - 15: According to IEC 137 level II or better 24, 25, 29, 32: Other dimensions on request , 13: Brown glazed porcelain, other colours and 16, 17: L 1 depends on L 4. The values in the table are valid Other creepage distances upon request for L 4= 0mm. If L 4>0mm add L 4 to L 1 and L. 15: According to IEC 137 level II or better 24, 25, 29, 32: Other dimensions on request. see fig. Substitute for E &E Substitute for E &E Page 7 / _00 Page 7 / _ _01

8 Type Type COT COT N N Type Type Highest voltage (Um) Highest voltage (Um) Maximum phase to earth voltage Maximum phase to earth voltage Bushing Dry Power frequency voltage Bushing withstand Dry (AC) Power frequency voltage Transformer Power frequency voltage withstand (AC) withstand (AC) Transformer Power frequency voltage withstand (AC) Lightning Impulse withstand voltage (BIL) Lightning Impulse withstand voltage (BIL) Switching Impulse wet (SIL): 250/2500µs Switching Impulse wet (SIL): 250/2500µs Rated current (Ir) mm² kv kv kv kv kv kv A mm mm mm kg N mm mm² kv kv kv kv kv kv A mm mm mm kg mm 01 COT / 800 cable N COT / cable cable 1 ) rem.co-cond. cable 1 2 ) fixed rem.co-cond. 2 ) fixed fixed Co-cond. Co-cond fixed fixed Co-cond. Co-cond COT / cable fixed Co-cond COT / cable cable 1 ) rem.co-cond. cable 1 2 ) fixed rem.co-cond. Co-cond. ) fixed Co-cond fixed Co-cond fixed Co-cond fixed Co-cond COT / 800 cable fixed Co-cond cable 1 ) COT / 800 cable rem.co-cond. 2 ) cable 1 ) fixed Co-cond rem.co-cond. 2 ) fixed Co-cond. - * fixed fixed Co-cond. Co-cond COT cable fixed Co-cond * cable fixed 1 ) Co-cond COT rem.co-cond. cable 2 ) fixed cable Co-cond. ) fixed rem.co-cond. 2 ) fixed fixed Co-cond. Co-cond COT Cable fixed Co-cond fixed fixed Co-cond. Co-cond COT fixed Cable Co-cond fixed Co-cond Comments related to columns 1 33: fixed Co-cond. - 04: Bushings test voltage at 50Hz 60 sec. 09: 1 ) Class F insulation ) Removable solid rod copper conductor : Extension for current transformer (other extensions on request) Connection system see pages 17 to 23 Comments related to columns 1 33: 13: * 31mm/kV in standard 04: Bushings test voltage at 50Hz 60 sec. 09: 1 ) Class F insulation 2 ) Removable solid rod copper conductor Rated current (Ir) Connection to Transformer Connection to Transformer Cable cross section Conductor CT Space L4 see fig.3 page 12 Cable cross section Conductor Standard: 0, 300, 500 CT AD Space Arcing L4 distance see fig.3 (min.) page 12 Standard: 0, 300, 500 AD Arcing distance (min.) Standard creepage distance Standard Mass Approx. creepage distance 25mm / kv 25mm / kv 11: Extension for current transformer (other extensions on request) Connection system see pages 17 to 23 13: * 31mm/kV in standard Mass Cantilever Approx. test load (min.) Cantilever test load (min.) Substitute for E &E Page 8 / _ _00

9 Type COT Type COT Rated current (Ir) Rated current (Ir) D 7 see L L 1 L 2 L 3 L 6 7 D 1 D 2 D 3 D 4 D 5 D 6 min D 7 øt n e fig. see L L 1 L 2 L 3 L 6 L 7 D D 1 D 2 D 3 D 4 D 5 D 6 min øt n e fig. A A mm mm mm mm , 13: 3742 Brown glazed 650 porcelain, 3092 other - colours 125 and , : - L400 1 depends 450 on L The values 300 in the 50 table are - valid Other creepage distances upon request for L 4= 0mm. If L 4>0mm add L 4 to L 1 and L. 15: According to IEC 137 level II or better 24, 25, 29, 32: Other dimensions on request. 12, 13: Brown glazed porcelain, other colours and 16, 17: L 1 depends on L 4. The values in the table are valid Other creepage distances upon request for L 4= 0mm. If L 4>0mm add L 4 to L 1 and L. 15: According to IEC 137 level II or better 24, 25, 29, 32: Other dimensions on request. Substitute for E &E Substitute for E &E Page 9 / _00 Page 9 / _ _01

10 Type Type COT COT N N Type Type Highest voltage (Um) Highest voltage (Um) Maximum phase to earth voltage Maximum phase to earth voltage Bushing Dry Power frequency voltage Bushing withstand Dry (AC) Power frequency voltage Transformer Power frequency voltage Transformer withstand (AC) Power frequency voltage withstand (AC) Lightning Impulse withstand voltage Lightning (BIL) Impulse withstand voltage (BIL) withstand (AC) Switching Impulse wet (SIL): 250/2500µs Rated current (Ir) kv kv kv kv kv kv kv A kv kv kv kv kv A mm² mm mm mm mm mm² mm mm mm kg mm N kg N 01 COT cable COT cable Fixed cond Fixed cond Fixed cond COT Fixed cond cable COT cable 1600 Fixed cond Fixed cond Fixed cond Fixed cond COT cable * COT Fixed cable cond *13750 * Fixed Fixed cond. cond *13750 * COT cable Fixed cond * COT Fixed cable cond Fixed Fixed cond. cond COT cable Fixed cond COT Fixed cable cond Fixed Fixed cond. cond COT cable Fixed cond COT Fixed cond cable Fixed cond Fixed cond Fixed cond Comments related to columns 1 33: Connection to Transformer Cable cross section Conductor 04: Bushings test voltage at 50Hz 60 sec. 11: Extension for current transformer (other extensions on request) Connection Comments system related see to pages columns 17 to 1 33: 23 13: * 31mm/kV in standard for Type COT 1425 Switching Impulse wet (SIL): 250/2500µs Rated current (Ir) Connection to Transformer CT Space L4 see fig.3 page 12 Cable cross section Conductor Standard: 0, 300, 500 CT Space L4 see fig.3 page 12 AD Arcing distance (min.) Standard: 0, 300, 500 AD Arcing distance (min.) Standard creepage distance Standard creepage distance Mass Approx. 25 mm / kv 25m m/kv 25 mm / kv 25m m/kv 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 Mass Cantilever Approx. test load (min) Cantilever test load (min) Substitute for E &E Page 10 / _ _00

11 Type Type COT COT Rated current (Ir) Rated current (Ir) L L L 1 L 1 L 2 L 2 L 3 L 3 L 6 L 6 7 L 7 D D 1 D 1 D 2 D 2 D 3 D 3 D 4 D 4 D 5 D 6 D 7 øt n D 5 D 6 D 7 øt e n see fig. e A A mm mm mm mm see fig , 13: 6255 Brown glazed 1200 porcelain, 5055 other - colours 125 and 28016, 17: L530 1 depends 590 on L The values 500 in the 50 table are - valid Other creepage distances upon request for L 4= 0mm. If L 4>0mm add L 4 to L 1 and L. 15: According to IEC 137 level II or better 24, 25, 29, 32: Other dimensions on request. 12, 13: Brown glazed porcelain, other colours and 16, 17: L 1 depends on L 4. The values in the table are valid Other creepage distances upon request for L 4= 0mm. If L 4>0mm add L 4 to L 1 and L. 15: According to IEC 137 level II or better 24, 25, 29, 32: Other dimensions on request. Substitute for E &E Substitute for E &E Page 11 / _00 Page 11 / _ _00

12 Dimensional Drawing D6 View A L6 D5 AD L3 L2 Fig. 1 Fig. 2 COT (Um =245kV), 3150 A D4 L COT 1050 (Um=300kV), 2500A COT e L7 L1 D1 Only for COT 420 kv L4 30 L1 D7 D Fig. 3 Fig. 4 Fig. 5 Substitute for E &E Page 12 / _ _00

13 Porcelain and composite insulator Porcelain Insulator (Type COT) Composite Insulator (Type COTC) Brown color (RAL 8016) Gray color (ANSI gray N70) Alternate sheds (ANSI gray N70) Helicoil sheds (ANSI gray N70) D4 D4 D4 D4 All COT(C) can be equipped with silicone rubber insulators upon request without affecting dimensions except D4 Substitute for E &E Page 13 / _ _00

14 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 Fig. 9 Substitute for E &E Page 14 / _ _00

15 Options Magnetic oil level indicator (Ø95) COT 250 COT 1800 Arcing horns Type min S max mm COT S COT COT COT COT COT COT COT COT Fig. 10 Fig. 11 Voltage tap according to ANSI/IEEE (20kV) Oil sampling device Multiple spring contact Valve Fig. 12 Fig. 13 Substitute for E &E Page 15 / _ _00

16 Recommendations for lead out arrangement Embedded 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 External shield 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 COT 1050 Ø40 Ø35,7 Cable insulation and distance to grounded parts Type Min. insulation thickness Min. distance to grounded parts S S 15 Ø80 (Um=245kV) Ø94 (Um=300kV) Fig. 16 Fig. 17 S R R1 mm COT COT COT COT COT COT COT COT COT COT 1175 to COT See spec Substitute for E &E Page 16 / _ _00

17 Removable Removable split conductor split conductor COT 125 COT 125 COT 1175 COT A 1250 A Cable bolt Cable bolt Removable split Removable conductor split conductor fixing screws 3 fixing screws Oil side end Position of standard split conductor. Others positions on request Oil side end 30 COT 125, COT 170 Ø29 Fig A 1250A A Ø40 COT 125, COT 170 Position of standard split conductor. Others positions on request Fig. 18 Ø A 1250A A Ø29 30 Ø40 Ø40 30 Ø Conductor Ø35 30 Ø40 Ø80 Ø80 Ø80 Cable Removable Ø Fig. 19 copper conductor Fig. 20 Fixed copper-conductor Fig. 21 Ø80 Conductor Ø35 Ø80 Ø40 Ø80 Cable Fig. 19 Removable copper conductor Fig. 20 Fixed copper-conductor Fig. 21 Substitute for E &E Page 17 / _ _00

18 Oil side end COT 250 COT A 1250A 1600 A 30 Ø29 8 Conductor Ø35 90 Ø35,7 Ø80 Ø80 Ø35 Ø80 Cable Fig. 22 Removable copper conductor Fig. 23 Fixed copper-conductor Fig A 3150A Ø40 Ø94 Fixed copper-conductor Ø40 Ø104 Fig. 25 Fixed copper-conductor Fig. 26 Substitute for E &E Page 18 / _ _00

19 Oil side end COT 550 COT A 1250A 1600 A Ø29 Conductor Ø35 90 Ø35,7 Ø68 Ø68 Ø35 Ø68 Cable Fig. 27 Removable copper conductor Fig. 28 Fixed copper-conductor Fig A 3150A 15 22, Ø40 Ø86 Ø114 Fixed copper-conductor Ø40 Ø160 Ø240 Fig. 30 Fixed copper-conductor with removable screwed shield Fig. 31 Substitute for E &E Page 19 / _ _00

20 Oil side end COT 1050, Um = 245 kv 1000A 1250A 1600 A Ø40 25 Ø29 90 Ø80 Conductor Ø38 Ø35 Ø119 Ø119 Ø119 Cable Fig. 32 Removable copper conductor Fig. 33 Fixed copper-conductor Fig A 3150A Ø40 Ø40 Ø95 Ø134 Fixed copper-conductor Ø180 Ø260 Fig. 35 Fixed copper-conductor with removable screwed shield Fig. 36 Substitute for E &E Page 20 / _ _00

21 Oil side end COT 1050, Um = 300 kv 1000A 1600A Ø Ø35 Ø95 Ø134 Ø95 Ø134 Cable Fig. 37 Fixed copper-conductor Fig A Ø40 Ø180 Ø260 Fixed copper-conductor with removable screwed shield Fig. 39 Substitute for E &E Page 21 / _ _00

22 Oil side end COT A 1600A Ø55 Ø110 Ø190 Cable with fixed shield Ø125 Oil side connector according to customer request Fig. 40 Fixed conductor Fig. 41 COT A 1600A Ø68 Ø Ø210 Ø330 Cable with fixed shield Ø160 Oil side connector according to customer request Fig. 42 Fixed conductor Fig. 43 Substitute for E &E Page 22 / _ _00

23 Oil side end : External shields FIXED SHIELD SHIELD WITH BAYONET SYSTEM Ø D 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 Fig. 46 Substitute for E &E Page 23 / _ _00

24 Product Range Bushings for Power Transformers up to 550 kv, 5000A High Current Application up to 52 kv, A Quality At Trench quality is a way of life. Trench quality assurance complies with the most stringent standards of ISO 9001 and ISO 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, A Railways Buildings, Wall up to 245 kv, 5000 A Bushings according Standard IEC Bushings according to customer s special specification Trench Limited Bushing Division 432 Monarch Avenue Ajax, Ontario Canada L1S 2G7 Phone : Fax : imprimerie de saint-louis substitute for E &E _01 Trench France SAS 16, rue du Général Cassagnou B.P F Saint-Louis Cedex France Phone : Fax : 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.

25 Bushings for metal clad installations SF6 / Oil Type SOT 123 kv to 550 kv Up to 2500 A According IEC & IEC

26 Bushings for transformer to gas insulated switchgear connections Trench OIP technology for Oil / SF6 bushings Application: Bushing Type SOT SF6 This type of bushing, suitable for direct connection between metal clad SF6-insulated switchgear and transformers, enables the integrating of power transformers to the grounded enclosure system of the switchgear. It is no longer required to join the transformers to the switchgear by means of overhead lines or cables, thus saving outdoor bushing or cable end boxes on both switchgear and transformer side. Features: Design is in line with latest requirements of IEC 1639 for gas side connection. Experience in bushing manufacture for more than 90 years. Capacitance fine graded oil-paper insulation with long experience. Computer optimized electrical field distribution. Proven high electrical withstand against transient or impulse test. Excellent long term stability due to extremely low partial discharge and power loss factor. Oil immersed part and SF6 part covered by epoxy resin tube providing high impact resistance. Tan δ and PD-values more than twice as good as requested by IEC Possibility to trace SF6 gas by means of doing DGA (dissolved gas analysis) Long term easy storage: Bushing 100% tight towards ambient humidity. Transformer Certified ISO 9001 Certified ISO Page 2 / _00

27 Oil / SF6 Bushing Design 1 2 SF6 side Shield (on request) SF6 side Terminal Terminal (Al or Cu) for connection is designed according standard IEC SF6 side end The insulator on the SF6 side is made of an epoxy resin tube. 4 Active part The active part is made of oil-impregnated wide band paper with layers of aluminum foil to control the electrical field radially and axially. Depending on the current rating, the paper and foil are wounded on either a central tube or conductor 5 Flange Mounting flange with integrated test tap and oil sampling device made of corrosion free aluminum alloy, machined to ensure an excellent seal between the bushing and the transformer or metal clad SF6 insulated switchgear. 6 Oil sampling device Test tap Test tap for through life capacitance and tan delta measurement. Oil side end The insulator on the SF6 side is made of an epoxy resin tube. Oil side terminal Terminal (Al or Cu) for connection Dimensions according customer request Oil side Shield (on request) Page 3 / _00

28 Standard: 100, 300 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 withstand voltage (SIL) Rated current (Ir) CT Space L4 Mass Approx. Cantilever test load (min) Type SOT kv kv kv kv kv kv A mm kg N L L1 L2 L3 L5 L6 L7 L8 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 n1 t1 n2 t2 n3 m3 n4 m4 mm ± M ± M M ± Page 4 / _00

29 Standard: 100, 300 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 withstand voltage (SIL) Rated current (Ir) CT Space L4 Mass Approx. Cantilever test load (min) kv kv kv kv kv A mm kg N L L1 L2 L3 L5 L6 L7 L8 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 n1 t1 n2 t2 n3 m3 n4 m4 mm ± M12 4 M10 Comments related to columns : 03: Bushings test voltage at 50Hz 60 sec. 08: Other extension current transformer on request 11,12: L 1 depends on L 4. The values in the table are valid for L 4= 100mm. If L 4>100mm add L 4 to L 1 and L. Page 5 / _00

30 L4 L1 L2 L3 L Dimensional Drawing SF6-Side ød4 L5 L6 ød1 Oil-Side Page 6 / _00

31 Dimensional Drawing Ø D6 Ø D5 SF6 side n3 x M 3 Ø D8 Ø D ± 0.3 L7 n2 x ø t2 Oil side Ø D3 Ø D2 L8 n1 x ø t1 n4 x M 4 Ø D9 Ø D10 Page 7 / _00

32 Standard G1/4 Air Outlet Flat gasket 6 Test tap (2kV) Multiple spring contact O-ring gasket 22 Oil sampling device Valve Page 8 / _00

33 On request Pressure control This system permit to control the pressure inside of the bushing Stress shield Stress shields are also available with bayonet fixing system and screwed fixing system If you need any Oil / SF6 bushing proven in operation conditions around the world, Trench has it! Page 9 / _00

34 Technical data request Mark the requested value Um 123kV 145kV 170kV 245kV 420kV 550kV Other... Up Transformer 230kV 275kV 325kV 460kV 630kV 680kV Other... BIL 550kV 650kV 750kV 1050kV 1425kV 1550kV 1675kV Other... Rated Current 1250A 1600A 2500A Other... CT Space 100mm 300mm Other... Terminals Material Aluminum Copper Other... Maximum Oil Temperature Other... Bus Duct Temperature Other Page 10 / _00

35 Notes: Page 11 / _00

36 _00 Page 12 / _00

37 Transformer High Current Bushings Type CFPT & CFCT 36kV up to 40kA IEC

38 High current bushings for transformer Features Bushing Type CFPT version Porcelain Insulator Trench RIG technology for oil-free, dry type bushings Experience: More than pieces with this insulation in service for more than 30 years (Generator Bushings with Ir max. 50kA) Trench RIG technology (Resin Impregnated FiberGlass) The active part consists of a solid core, made of fiber glass and inserted concentric layers for the electrical field distribution. The active part is impregnated under vacuum with a special epoxy resin. Advantages and benefits Bushing Type CFCT version Composite Insulator Insulation (class F, 155 C) according IEC Partial discharge <10pC at Um Low dissipation factor (tg ) <0,005 No paper for insulation; limited sensibility to humidity Highest mechanical performance today Higher performance due to cooling system with transformer oil No additional filling between porcelain and active part Tightness of the bushing is made by means of O-rings No over pressure in the bushing possible Easy Interchangeability with all existing designs Possibility to offer the whole package for GSU transformers Available with porcelain or composite insulator on air side with same dimensions Bushing can be vertically or horizontally mounted Standard creepage distance: 31mm/kV Page 2 / _ _01

39 High current bushings for transformer Design Top terminal in aluminum or copper (silver-plated) 2. Conductor in aluminum in standard or copper on request 3. Bottom terminal in aluminum or copper (silver-plated) 4. Active part in resin impregnated fiber glass 5. Insulator porcelain or composite 6. Flange in aluminum 7. Air escape screw 8. Test tap Standards Trench RIG high current bushings are specified and tested according to the latest IEC and IEEE C Current rating The CFPT and CFCT bushings are designed to connect an oil filled transformer winding to a generator bus in a duct. The bushing current rating is guaranteed for the following environmental conditions: o Transformer oil temperature = 90 C o Maximum, hot spot, bushing conductor temperature = 135 C o Maximum ambient air temperature in bus duct = 70 C CFPT and CFCT bushings will operate properly regardless of the surrounding air temperature inside the bus duct Rated current can be increased when used without a bus duct. Maintenance free Maintenance and inspection free The bushings are equipped with a test tap (see page 7 picture 5) on the flange. This enables the dielectric dissipation factor (tg ) and the capacitance of the bushing to be measured. Page 3 / _ _01

40 Type CFPT & CFCT 36kV 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) Rated current (Ir) CT Space L4 AD Arcing distance (min.) Standard creepage distance 31mm/kV Mass Approx. Cantilever test load (min) Number of upper connection pads Number of lower connection pads Top terminal Bottom terminal See connection page L L1 L2 L4 D1 D2 D3 D4 D5 øt n e kv kv kv kv kv A mm mm mm kg N mm mm xØ18 4xØ18 page xØ18 4xØ18 page xØ18 6xØ18 page xØ18 8xØ18 page xØ18 12xØ18 page xØ18 16xØ18 page 11 Standard: 0, 300 Comments related to columns : 03: Bushings test voltage at 50Hz 60 sec. 07: Other extension current transformer on request 08,09: Brown glazed porcelain, Gray color on request 09: 31mm/kV in standard 12,13: L1 depends on L4. The values in the table are valid for L4= 0mm. If L4>0mm add L4 to L1 and L. Page 4 / _ _01

41 Dimensional Drawing D4 D5 L2 L1 L4 L D1 n x øt 3x45 e D2 D3 Page 5 / _ _01

42 Standard Aluminum Connection 7800A 150 on pads 55 Air side 4 connections pads Thickness 25mm 2 x ø Oil side x ø Page 6 / _ _01

43 Standard Aluminum Connection 12000A 235 on pads 55 Air side 6 connections pads Thickness 25mm 2 x ø Oil side x ø18 Page 7 / _ _01

44 Standard Aluminum Connection 16000A 335 on pads 55 Air side 10 connections pads Thickness 25mm 2 x ø Oil side x ø18 Page 8 / _ _01

45 Standard Aluminum Connection 20000A 460 on pads Air side 14 connections pads Thickness 25mm x ø x ø18 Oil side Page 9 / _ _01

46 Standard Aluminum Connection 25000A Air side 16 connections pads Thickness 25mm 560 on pads x ø18 2 x ø18 Oil side Page 10 / _ _01

47 Standard Aluminum Connection 31500A Air side 22 connections pads Thickness 25mm 670 on pads 2 x ø x ø Oil side Page 11 / _ _01

48 On Request Every connection and interchangeability configuration can be done Page 12 / _ _01

49 G1/4 Air Outlet Test Tap Springs Lock System Page 13 / _ _01

50 Technical data request Mark the requested value Um 24kV 36kV 52kV Other... Up Transfo 50kV 70kV 95kV Other... BIL 125kV 170kV 250kV Other... Rated Current 7800A 12000A 16000A 20000A 25000A 31500A Other... CT Space 0mm 300mm Other... Terminals Material Aluminum Copper Other... Maximum Oil Temperature Other... Bus Duct Other... Mounting Vertical Horizontal Other Page 14 / _ _01

51 Notes: Page 15 / _ _01

52 Product Range Bushings for Power Transformers up to 550 kv, 5000A High Current Application up to 52 kv, 40kA Quality At Trench quality is a way of life. Trench quality assurance complies with the most stringent standards of ISO 9001 and ISO 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, 50kA Railways Buildings, Wall up to 245 kv, 5000A Bushings according Standard IEC Bushings according to customer s special specification imprimerie de saint-louis troendlé bieler _01 Trench France SAS 16, rue du Général Cassagnou B.P F Saint-Louis Cedex France Phone : Fax : 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.

53 Generator High Voltage Bushings up to 36 kv up to 50kA according to all standards or customer specification

54 High voltage bushings for Generator Application: Generator bushings are used for leading the current induced in the stator-windings through the pressurized, hydrogen-gas tight, earthed generator housing. Trench RIG technology (Resin Impregnated FiberGlass) The active part consists of a solid core, made of fiberglass reinforced epoxy resin, impregnated under vacuum. - Low partial discharge and power loss factor - Excellent behavior in temperature - High resistance to mechanical stress Features: Experience in bushing manufacture for more than 40 years. More than Generator bushings in service. Easy interchangeability with old bushing existing designs, dimensions may be chosen in order to secure direct interfacing with all generator designs. Excellent long term stability due to extremely low partial discharge and power loss factor (PD 10 pc at 1.05 Ur / 3 ; Tanδ at 1.05 Ur / 3) Epoxy resin tube providing high impact resistance and excellent behavior in temperature (Class F = 155 C) Paint cover on the active part : no real utility of porcelain mounting (porcelain on request) Flange made of aluminum (non magnetic steel on request) Very good mechanical static and vibrations withstand. Proven high electrical withstand against impulse test. Tightness is guaranteed by O-rings : no leakage due to pressure in the bushing. Fast and easy maintenance of our bushings during refurbishment of the generator, also after 20 years of service. Certified ISO 9001 Certified ISO Page 2 / _00

55 High voltage bushings for Generator 1 Air side connection Design Copper with silver plated connecting area Cover (when porcelain) Tightening nut O-ring Ensure the tightness between in- and out-side of the bushing. 5 6 Porcelain insulator (on request) Flange Mounting flange made of corrosion-free aluminum alloy (or non-magnetic stainless steel on request). Glued-shrunk on the insulation tube and machined to ensure an excellent seal between the bushing and the generator housing. 7 O-ring Redundant O-ring to ensure tighness between flange and tube i.e. gas side and air side of the bushing 8 Active part / Insulation tube Active part made out of fiberglass reinforced epoxy resin with one earthed layer foil to control the electrical field radially and axially. Temperature class F (155 C) 9 Copper conductor Copper conductor made out of oxygen free copper (acc. to EN 13600/13601) 10 Guiding/Centering ring The centering ring maintains the insulation tube centered with the copper conductor and allows coaxial thermal expansion without stress. 11 Gas side connection Copper with silver plated connecting area Page 3 / _00

56 High voltage bushings for Generator Design The main conductor (9) is made out of oxygen free copper (acc. to EN 1600/13601) with silver plated connecting areas. The supporting insulation tube (8) is a vacuum impregnated, glassfiber reinforced epoxy resin (temperature class F : 155 C). Both parts are assembled at the air side through a tightening cone including an O-ring gasket (4). A tightening nut (3) ensures a gastight immobilization of the whole assembly. The space between the conductor and the insulating tube is filled with the hydrogen gas of the generator. The gas pressure in the bushing increases the pressure on the tightness gasket (4). The insulation tube is supported at the gas-end by a guiding disc (10) which allows the current lead to expand in both directions without stressing the gasketing area (4). The active part is not in contact with the conductor and will age very slowly. The fixing flange (6) is made out of antimagnetic metal. It is glued-shrunk onto the insulation tube. An O-ring (7) ensures the tightness between both parts. Depending on the voltage, the insulating tube is electrically graded in order to grant a homogeneous field distribution. The material is, up to a large extend, impervious to humidity and needs no additional protection while used in dry or moderately humid places. For unfavorable climatic conditions or heavily polluted environment, the insulation tube may be protected by a glazed and grooved porcelain (5) at the air side. This porcelain is not pressure-stressed by the hydrogen gas, and in case of breaking, it can be interchanged without removing the bushing from the generator. Standards TRENCH Generator Bushings are specified and tested according to latest IEC 60137, DIN 48124, ANSI/IEEE or customer specification. The dimensions depend on the specified rated and test values. The dimensions may be chosen in order to secure direct interfacing with all generator designs. The current load is depending on cooling medium temperature, pressure and flow, as well as on connection design, to be defined between the buyer and the manufacturer. Designation Example : V R P H 25 / V Insulator body of glassfiber R with tubular conductor S with profile conductor P if with Porcelain H Gastight (H2, etc) Ur (kv) Nominal voltage Up (kv) Test voltage 50/60Hz, 1min I (ka) Rated current F Liquid cooled Page 4 / _00

57 Natural cooled up to 19 ka Service and cooling conditions as per DIN 48124, part.1 in vertical to horizontal service position. Connecting areas silver plated 5µm ; Rated voltage up to 36 kv. Examples : Standard IEC DIN Nominal Voltage (kv) Phase to earth Voltage (kv) Test Voltage (kv) 50/60 Hz, 1 min Impulse Voltage (kv) 1.2/50µs Designation Rated Voltage kv Test voltage 50/60 Hz, 1min. kv Impulse voltage 1,2/50 µs kv Rated Current ka Standard VSH 17.5/45 N100x185 17, DIN VSH 17.5/45 N120x185 17, DIN VSH 17.5/ , IEC VSPH 24/ IEC VRH 19/59 N140x IEC VRH 20/ IEC VRH 21.5/57 N100x IEC / DIN VRPH 25/ IEC VSH 17.5/45 N100x185 Page 5 / _00

58 Gas cooled up to 35 ka Current load depending on the coolant gas temperature and speed, as well as on the connection design, to be defined between the buyer and the manufacturer Connecting areas silver plated 5µm ; Rated voltage up to 36 kv. Examples : Standard IEC Nominal Voltage (kv) Phase to earth Voltage (kv) Test Voltage (kv) 50/60 Hz, 1 min Impulse Voltage (kv) 1.2/50µs DIN IEEE Designation Rated Voltage kv Test voltage 50/60 Hz, 1min. kv Impulse voltage 1,2/50 µs kv Rated Current ka Standard VRH 16/ IEC VRH 17.5/45 N120x IEC VRH 18.8/ , DIN VRH 19.1 G -110x185 19, DIN VRH 19.1/ , IEC VRPH 21/ IEC VRH 23.3 GC120x IEC / DIN VRPH 25/ IEC VRH 26/ IEC / DIN VRPH 27/ IEC VRPH 25/ Page 6 / _00

59 Liquid cooled - up to 50 ka Current load depending on the temperature, flow rate and guidance of the coolant, as well as on the connection design, to be defined between the buyer and the manufacturer Connecting areas silver plated 5µm ; Rated voltage up to 36 kv. Standard Nominal Voltage (kv) Phase to earth Voltage (kv) Test Voltage (kv) 50/60 Hz, 1 min Impulse Voltage (kv) 1.2/50µs IEC DIN IEEE Examples : Designation Rated Voltage kv Test voltage 50/60 Hz, 1min. kv Impulse voltage 1,2/50 µs kv Rated Current ka Standard VFH 23.1 LC-120Mx IEC VFH 24/ IEC VFH 24.5 LC-120Mx IEC / DIN VFPH 25/ IEC60137 VFH 27/82.5 LC-150Mx DIN VFH 27.8 LC-120Mx VFH 30/75 LC120Mx IEC / DIN IEC / DIN VFPH 30/ IEC VFH 36/ IEC VFH 36/ IEC VFH 36/ Page 7 / _00

60 Product Range Bushings for Power Transformers up to 550 kv, 5000A High Current Application up to 52 kv, 40kA Quality At Trench quality is a way of life. Trench quality assurance complies with the most stringent standards of ISO 9001 and ISO 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, 50kA Railways Buildings, Wall up to 245 kv, 5000A Bushings according Standard IEC Bushings according to customer s special specification imprimerie de saint-louis _00 Trench France SAS 16, rue du Général Cassagnou B.P F Saint-Louis Cedex France Phone : Fax : 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.

61 Oil Impregnated Paper Transformer Bushings type COT with Composite Insulator More than 20 years Experience Outstanding performance for heavy polluted application Excellent Resistance to vandalism Maintenance free Particularly suitable in seismic area Lower Weight versus porcelain insulator

62 Composite Insulator Composite insulators are available for our range of products COT from 24 to 550kV as well as for High Current bushings CFPT (Please refer to our catalogues references E322.81, E322.90) Both types of bushings have the same dimensions either if they are with a porcelain or composite insulator. They will be fully interchangeable with existing units. Basic Structure of Hollow Composite Insulators Trench in co-operation with its suppliers has developed a special high quality silicone for its bushing composite insulators. Tube in Fiberglass impregnated with epoxy resin Silicone Rubber sheds Benefits from Composite Insulators Safety Flashover resistant by the suppression of leakage currents Explosion proof, no collateral damage Resistant against vandalism Low risk of damages due to handling failures Maintenance free Outstanding performance in high level pollution environment. The particular characteristics of the composite insulator need seldom cleaning operations even if running in severe conditions.

63 Easy to use Composite insulators have a significant lower weight Easier handling and installation Damaged sheds can be repaired on-site Hydrophobicity The surface of the high voltage composite insulator is hydrophobic, the leakage currents as well as the surface discharge activities are significantly reduced. Lifetime Trench was one of the first manufacturers to use composite materials for high voltage insulators. Now, composite insulator is a well-established product in the high voltage industry world-wide. Trench has years of experience with electrical and mechanical design, material selection, production and testing. Having installed more than 10,000 units we have experience in different climatic zones and at all high voltage levels. No deterioration ageing of our composite insulators has been reported. With this background, Trench is in a position to guarantee long life for all its composite insulators. Earthquake resistant Particularly suitable in regions where severe earthquakes may be expected. From a dynamic or seismic stand point, composite performs much better in earthquake than porcelain This has been proved by the most critical test: 1.0G, 10 Cycles Sine-Beat Test For 500 kv, 345 kv and 230 kv The Fiberglass Tube and Composite housing provide an unique combination of lower weight and high strength.

64 Product Range Quality Bushings for At Trench quality is a way of life. Trench quality assurance complies with the most stringent standard of ISO Power Transformers up to 550 kv, 3150A High Current Application up to 52 kv, A Transformer to SF6 connection up to 550kV Generators up to 36 kv,50000 A Railways Buildings, Wall up to 245 kv, 5000 A Bushings according Standard IEC Bushings according to customer s special specification Trench Switzerland-France 16, rue du Général Cassagnou B.P F Saint-Louis Cedex France Phone : Fax : imprimerie de saint-louis troendlé bieler Subject to change without notice Sales-bushing.fr@trench-group.com Certified by AFAQ since 1994

65 WALL BUSHING Type CPWP 24 to 123kV Outdoor/Outdoor service up to 2500A IEC GB 1 / 4 September 2004 revision 00

66 Technical Data Wall bushings Type CPWP 24 to 123kV Outdoor/Outdoor N. Rated Voltage Rated phase to earth voltage Test Voltage 60 sec. Impulse Voltage 1,2/50 µs Rated Current Material of connection Wall (L4) AD Arcing distance (min.) Standard creepage distance (min.) Mass Approx. Cantilever test load (min.) L L1 L2 D6 x L6 D1 D2 D3 D4 D5 t e kv kv kv kv A mm mm mm kg N mm mm mm mm mm mm mm mm mm mm mm Aluminium x Aluminium x Copper x Copper x Aluminium x Aluminium x Copper x Copper x Standard: 300, Aluminium x Aluminium x Copper x Aluminium x , Aluminium x Copper x Aluminium x Aluminium x Copper x Aluminium x Aluminium x Copper x Application Wall bushings of the type CPWP are used to transfer the electrical voltage through a wall on outdoor side Description The insulating body of bakelised paper is wound on a solid conductor. To achieve uniform voltage distribution in radial and axial direction, a number of conducting layers are wound into this body in such a manner that a series of coaxial capacitors is obtained between conductor and mounting flange. The flange, made of aluminium is glued on the insulating body. The inner capacitor layer is connected to the conductor and the exterior one to the flange by a contact screw. The service position of this type of wall bushing is horizontal. Comments related to columms L2, L3 and Mass The values and mass are valid for a wall (L4) of 300mm GB 2 / 4 September 2004 revision 00

67 Technical Data Wall bushings Type CPWP 24 to 123kV Outdoor/Outdoor GB 3 / 4 September 2004 revision 00

68 Product Range Quality Bushings for - Power Transformers up to 765 kv, 3150A (>245 kv see separate brochure) High Current Application up to 36 kv, A Transformer to SF6 connection up to 550kV - Gas-insulated Switchgear (GIS) up to 800 kv, 6000A - Generators up to 36 kv,45000 A - Railways - Buildings up to 245 kv, 3000 A Bushings according standards as: IEC Bushings according to customer's special specification At Trench quality is a way of life. Trench quality assurance complies with the most stringent standard of ISO Certified by AFAQ since 1994 Trench Austria Gmbh Paschinger Srasse 49 Posfach 13 A-4060 Linz-Leonding Austria Phone: Fax: Trench Brasil Ltda Via Expressa de Contagem, 2685 Contagem, Minas Gerais CEP Brazil Phone: Fax: Trench China MWB (Shanghai) Co.,Ltd No.3658 Jiangcheng Road Minhang, Shanghai, Peoples Republic of China Phone: Fax: Trench Fushun Dong Er Dao, Shuncheng District, Fushung, Liaoning Province, Peoples Republic of China Phone: Fax: Trench Limited Bushing Division 432 Monarch Avenue Ajax, Ontario Canada L1S 2G7 Phone: Fax: Trench Limited Coil Product Division 71 Maybrook Drive Scarborough, Ontario Canada M1V 4B6 Phone: Fax: Trench Limited Instrument Transformer Division 390Midwest Road Scarborough, Ontario Canada M1P 3B5 Phone: Fax: Trench France S.A. 16, Rue du Général Cassagnou B.P.70 F Saint Louis, Cedex France Phone: Fax: Trench Germany GmbH Nürnberg Strasse 199 D Bamberg Germany Phone: Fax: Trench Schwitzerland Lehenmattstrasse 353 CH-4028 Basel Schwitzerland Phone: Fax: Trench (UK) Limited South Drive Hebburn Tyne & Wear NE 31 1 UW Phone: Fax: GB 4 / 4 September 2004 revision 00

69 GUIDE LINE FOR WALL BUSHINGS Requested Information Trench choice if not specified: Customer Request Application: indoor - indoor outdoor - indoor outdoor - outdoor Standard: IEC IEC Rated Voltage: 50 Hz 1 min test voltage 1,2/50µs BIL Rated Current: Thermal Short-Circuit current Dynamical Short Circuit current peak Conductor/connection: connection dimension (D6 x L6) Wall thickness (L4) kv kv A ka. s ka Copper or Aluminium x Ir during 3 sec 2,55 x I th Elevation above sea level: M 1000 m Outdoor Pollution Class (25mm/kV, 31mm/kV or special) Indoor conditions: Standard maximum annual average humidity On request maximum annual average humidity Clean room mm/kv 65% 80% 25 mm/kv 65% Clean room

70 WALL BUSHING Type CPW 24 to 123kV Indoor/Outdoor service up to 2500A IEC GB 1 / 4 September 2004 revision 00

71 Technical Data Wall bushings Type CPW 24 to 123kV Indoor/Outdoor N. Rated Voltage Rated phase to earth voltage Test Voltage 60 sec. Impulse Voltage 1,2/50 µs Rated Current Material of connection Wall (L4) AD Arcing distance (min.) Standard creepage distance (min.) Mass Approx. Cantilever test load (min.) L L1 L2 D6 x L6 D1 D2 D3 D4 D5 t e kv kv kv kv A mm mm mm kg N mm mm mm mm mm mm mm mm mm mm mm Aluminium x Aluminium x Copper x Copper x Aluminium x Aluminium x Copper x Copper x Standard: 300, Aluminium x Aluminium x Copper x Aluminium x , Aluminium x Copper x Aluminium x Aluminium x Copper x Aluminium x Aluminium x Copper x Application Wall bushings of the type CPW are used to transfer the electrical voltage through a wall or a room closing with moderate humidity indoor side - standard maximum annual average of 65% humidity (without water condensation) indoor side. - on request maximum annual average of 80% humidity with a special painting (without water condensation) indoor side. Description The insulating body of bakelised paper is wound on a solid conductor. To achieve uniform voltage distribution in radial and axial direction, a number of conducting layers are wound into this body in such a manner that a series of coaxial capacitors is obtained between conductor and mounting flange. The flange, made of aluminium is glued on the insulating body. The inner capacitor layer is connected to the conductor and the exterior one to the flange by a contact screw. The service position of this type of wall bushing can be vertical or horizontal. Comments related to columms L2, L3 and Mass The values and mass are valid for a wall (L4) of 300mm GB 2 / 4 September 2004 revision 00

72 Technical Data Wall bushings Type CPW 24 to 123kV Indoor/Outdoor GB 3 / 4 September 2004 revision 00

73 Product Range Quality Bushings for - Power Transformers up to 765 kv, 3150A (>245 kv see separate brochure) High Current Application up to 36 kv, A Transformer to SF6 connection up to 550kV - Gas-insulated Switchgear (GIS) up to 800 kv, 6000A - Generators up to 36 kv,45000 A - Railways - Buildings up to 245 kv, 3000 A Bushings according standards as: IEC Bushings according to customer's special specification At Trench quality is a way of life. Trench quality assurance complies with the most stringent standard of ISO Certified by AFAQ since 1994 Trench Austria Gmbh Paschinger Srasse 49 Posfach 13 A-4060 Linz-Leonding Austria Phone: Fax: Trench Brasil Ltda Via Expressa de Contagem, 2685 Contagem, Minas Gerais CEP Brazil Phone: Fax: Trench China MWB (Shanghai) Co.,Ltd No.3658 Jiangcheng Road Minhang, Shanghai, Peoples Republic of China Phone: Fax: Trench Fushun Dong Er Dao, Shuncheng District, Fushung, Liaoning Province, Peoples Republic of China Phone: Fax: Trench Limited Bushing Division 432 Monarch Avenue Ajax, Ontario Canada L1S 2G7 Phone: Fax: Trench Limited Coil Product Division 71 Maybrook Drive Scarborough, Ontario Canada M1V 4B6 Phone: Fax: Trench Limited Instrument Transformer Division 390Midwest Road Scarborough, Ontario Canada M1P 3B5 Phone: Fax: Trench France S.A. 16, Rue du Général Cassagnou B.P.70 F Saint Louis, Cedex France Phone: Fax: Trench Germany GmbH Nürnberg Strasse 199 D Bamberg Germany Phone: Fax: Trench Schwitzerland Lehenmattstrasse 353 CH-4028 Basel Schwitzerland Phone: Fax: Trench (UK) Limited South Drive Hebburn Tyne & Wear NE 31 1 UW Phone: Fax: GB 4 / 4 September 2004 revision 00

74 GUIDE LINE FOR WALL BUSHINGS Requested Information Trench choice if not specified: Customer Request Application: indoor - indoor outdoor - indoor outdoor - outdoor Standard: IEC IEC Rated Voltage: 50 Hz 1 min test voltage 1,2/50µs BIL Rated Current: Thermal Short-Circuit current Dynamical Short Circuit current peak Conductor/connection: connection dimension (D6 x L6) Wall thickness (L4) kv kv A ka. s ka Copper or Aluminium x Ir during 3 sec 2,55 x I th Elevation above sea level: M 1000 m Outdoor Pollution Class (25mm/kV, 31mm/kV or special) Indoor conditions: Standard maximum annual average humidity On request maximum annual average humidity Clean room mm/kv 65% 80% 25 mm/kv 65% Clean room