EKTG 72.5 800 kVRIP Transformer Gas Bushing

RIP condenser bushing type EKTG

2|3

DesignIntended for the direct connection of power transformers to SF6-switchgear, the type EKTG has an insulating body of resin impregnated paper (RIP). The condenser core is made of special paper epoxy resin vacuum-impregnated paper. Conductive layers made of aluminium foil are inserted between these paper layers for grading the electric eld. Thanks to their good conductivity, optimum voltage distribution is guaranteed even in case of rapid voltage changes. A system of multiple-sealing of oil- and SF6-resistant O-ring seals is employed between the main insulating body and the bushing ange and also between body and current conductor. In the ange area between the seals of oil and gas side there is an annular chamber to collect gas which may penetrate because of possible long-term diffusion processes. This gas is released into the atmosphere almost pressureless without entering the transformer. A liquid sealing chamber supports the O-ring seals at the current conductor. The bushing core is xed in the ange. The ange is made of a central part and two ange plates, which are screwed to the central part and sealed by O-rings. This permits a maximum adaptability, particularly in view of the different SF6-substation designs. The types specied in this brochure represent standard versions. Modications are possible but may result in price changes or different delivery times and must therefore be specically requested. The technical designs of these bushing types are documented in comprehensive delivery specications. A technically gastight main insulating body is achieved by the method of manufacture. No additional sealing is required. The current conductor is un-detachably connected to the bushing core. The rm connection is necessary, because the bushing is tested for gas-tightness before it is supplied. All bushings have a test tap. When the cap is screwed in position, the last layer of the condenser grading is earthed via the contact spring located in the cap. The built-in, insulated bushing has a 4-mm pin onto which a corresponding, resilient socket can be plugged for test purposes. All bushings also have two M12 earthing holes and threaded lifting holes on the pitch circle diameter of the transformer side ange plate as a standard.

Standards and customized modicationsAll bushings are designed to comply with IEC Standard 60137 and tested accordingly. The dimensions of the SF6-side of the bushings correspond to the data of IEC 61639 and IEC 62271-211 Bushings that comply with IEEE Standard or other national regulations are available on request.

Type series EKTG Dimensional drawingTest tap

RIP condenser bushing type EKTG D1

S2 L2 F L

S1 E

L1

Test tap

28 M24 x 1.5 4

SW27

Test tap principle: When the test tap cap is screwed on, the pin of the insulating bushing is earthed.28

For test purposes, plug on a 4-mm spring socket.

19

45

9

20

Sealing surface

18.5All dimensions in the sectional views are given in mm.

O-ring 22 x 2.5

Transformer side connection with screen electrode

Dimensions of standard insulating electrodesEK1 D9 D10 L7 L8 mm mm mm mm 160 200 200 130 EK2 180 250 250 160 EK3 198 300 300 170 EK4 250 350 350 190

Recommendation transformer-at connecting terminalCurrent [A] Up to 1000 Up to 2500 Up to 3150 w x h x d [mm] 35 x 65 x 12 45 x 85 x 16 55 x 105 x 20 D [mm] 11 14 18

L7

L8

H D B D9 D10 Transformer lead with bushing type EKTG Source: Weidmann Electrical Technology AG, Switzerland T

d1

Type series EKTG Details and dimensions

4|5

Cross section EKTG

Recommended installation of screen electrodesInsulating electrode with bayonet from HSP

SF6-side connection Round nut Liquid sealing Insulating body Grading layers Conductor bolt Flange plate SF6-side Central ange part SF6-resistant O-ring sealing Oil-resistant O-ring sealing

Test voltage [kV] Um 72.5 100 123 145 170 245 300 362 420 550 550 765 800 AC1min 155 205 255 305 355 505 505 560 695 750 870 970 1075

EK1 ( 200 x 200) A [mm] 130 150 170 200 290 420 420

EK2 ( 250 x 250) A [mm] 150 160 180 210 250 400 400 450 675 850

EK3 ( 300 x 300) A [mm] 330 330 375 530 650

EK4 ( 350 x 350) A [mm] 375 510 600 800

Minimum distance A [mm] 110 130 160 185 210 330 330 340 410 500 550 650 700 A 60

Additional barriers required

Flange plate transformer side Test tap Air release valve (opposite of the test tap)

Screen electrodesBushings can be shielded with an electrode. The dimensions given in the table refer to electrodes (EK1EK4) made of insulating material, that can be detached via a bayonet connection. They can be moved upwards as well as downwards for the installation of the bushing. The required distance to ground A in each case is contained in the table above. Additional insulating measures or larger distances may be necessary because of the constraints when installing in the transformer. The bushing can also be operated with electrodes and barrier systems not manufactured by HSP. The distance must not be less than the Minimum distance A given in the above table.

Transformer vent (opposite of the test tap)

O-ring Transformer side at connecting terminal (option: round connecting terminal) Electrode

C.T.

Electrical values/dimensions1050-245-1000 1050-245-1600 1050-245-2000 1050-245-2500 1050-300-1000 1050-300-1600 1050-300-2000 1050-300-2500300 173 1050 850 2500 505 5 390 / 1050 / 1155 / 1271

6|7

550-123-1000

550-123-1600

550-123-2000

550-123-2500

650-145-1000

650-145-1600

650-145-2000

650-145-2500

750-170-1000

750-170-1600

750-170-2000

Bushing type EKTGDescription Technical data Highest voltage for equipment: Um Max. service voltage: line-ground Rated lightning impulse withstand voltage: 1.2/50 s Rated switching impulse withstand voltage: 250/2500 s Rated current and maximum service current: Ir ; Imax Routine Test voltage levels Power frequency withstand voltage dry: Up 50 Hz, 1min Maximum value of partial discharge Partial discharge extinction voltage Lightning impulse test voltage (BIL): 1.2/50 s Chopped lightning impulse test voltage: time to sparkover 26 s Type Test voltage levels Lightning impulse test voltage (BIL): 1.2/50 s Chopped lightning impulse test voltage: time to sparkover 26 s Switching impulse test voltage dry (SIL): 250/2500 s Dimensions D1 d1 S1 S2 F d2 d3 e D3 D4 i1 z1 a1 D5 D6 D7 D8 i2 z2 a2 L2 C.T. accommodation length Total length C.T. accommodation length Total length C.T. accommodation length Total length E L1 L E L E L mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm pos./ neg. pos./ neg. pos./ neg. kV kV kV pos./ neg. pos./ neg. kV pC kV kV kV kV kV kV kV A

72.5 42 325 1000

72.5 42 325 1600

72.5 42 325 2000

72.5 42 325 2500

123 71 550 1000

123 71 550 1600

123 71 550 2000

123 71 550 2500

145 84 650 1000

145 84 650 1600

145 84 650 2000

145 84 650 2500

170 98 750 1000

170 98 750 1600

170 98 750 2000

170 98 750 2500

750-170-2500

325-73-1000

325-73-1600

325-73-2000

325-73-2500

245 142 1050 850 1000

245 142 1050 850 1600

245 142 1050 850 2000

245 142 1050 850 2500

300 173 1050 850 1000

300 173 1050 850 1600

300 173 1050 850 2000

155 5 94 / /

155 5 94 / /

155 5 94 / /

155 5 94 / /

255 5 160 / /

255 5 160 / /

255 5 160 / /

255 5 160 / /

305 5 188 / /

305 5 188 / /

305 5 188 / /

305 5 188 / /

355 5 221 / /

355 5 221 / /

355 5 221 / /

355 5 221 / /

505 5 318 / 1050 / 1155

505 5 318 / 1050 / 1155

505 5 318 / 1050 / 1155

505 5 318 / 1050 / 1155

505 5 390 / 1050 / 1155

505 5 390 / 1050 / 1155

505 5 390 / 1050 / 1155

325/ 325 / /

325/ 325 / /

325/ 325 / /

325/ 325 / /

550/ 605 / 666 /

550/ 605 / 666 /

550/ 605 / 666 /

550/ 605 / 666 /

650/ 715 / 787 /

650/ 715 / 787 /

650/ 715 / 787 /

650/ 715 / 787 /

750/ 825 / 908 /

750/ 825 / 908 /

750/ 825 / 908 /

750/ 825 / 908 /

1050/1155 1050/1155 1050/1155 1050/1155 1050/1155 1050/1155 1050/1155 1050/1155 / 1271 850/935 / 1271 850/935 / 1271 850/935 / 1271 850/935 / 1271 850/935 / 1271 850/935 / 1271 850/935

850/935

100 90 15 25 200 99 70 20 250 290 15 8 45 285 315 200 260 16 8 45 330 100 230 860 300 1060 600 1360

100 90 15 25 200 99 70 20 250 290 15 8 45 285 315 200 260 16 8 45 330 100 230 860 300 1060 600 1360

130 100 15 25 200 99 70 20 250 290 15 8 45 285 315 200 260 16 8 45 330 100 230 860 300 1060 600 1360

130 100 15 25 200 99 70 20 250 290 15 8 45 285 315 200 260 16 8 45 330 100 230 860 300 1060 600 1360

130 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 350 1175 300 1375 600 1675

130 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 350 1175 300 1375 600 1675

130 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 350 1175 300 1375 600 1675

150 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 350 1175 300 1375 600 1675

150 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 390 1215 300 1415 600 1715

150 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 390 1215 300 1415 600 1715

150 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 390 1215 300 1415 600 1715

170 120 20 30 205 99 70 20 290 335 20 12 30 305 335 230* 280 16 8 45 520 100 390 1215 300 1415 600 1715

150 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 450 1275 300 1475 600 1775

150 120 20 30 205 99 70 20 290 335 20 12 30 305 335 220 280 16 8 45 520 100 450 1275 300 1475 600 1775

170 120 20 30 205 99 70 20 290 335 20 12 30 305 335 230* 280 16 8 45 520 100 450 1275 300 1475 600 1775

170 140 20 30 205 99 70 20 290 335 20 12 30 305 335 230* 280 16 8 45 520 100 450 1275 300 1475 600 1775

190 140 20 35 210 139 110 25 350 400 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

190 140 20 35 210 139 110 25 350 400 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

210 140 20 35 210 139 110 25 350 400 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

230 140 20 35 210 139 110 25 400 450 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

190 140 20 35 210 139 110 25 350 400 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

190 140 20 35 210 139 110 25 350 400 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

210 140 20 35 210 139 110 25 350 400 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

230 150 20 35 210 139 110 25 400 450 20 12 30 535 565 450 510 16 16 22.5 770 100 620 1700 300 1900 600 2200

* Dimension not according to IEC 616369/IEC 62271-211

Detailed drawings for the dimensions of the table see traps of the front and back cover.

Electrical values/dimensions1175-362-1000 1175-362-1600 1175-362-2000 1175-362-2500 1425-420-1000 1425-420-1600 1425-420-2000 1425-420-2500 1550-420-1000 1550-420-1600 1550-420-2000 1550-420-2500 1675-550-1000 1675-550-1600 1675-550-2000 1675-550-2500 1800-550-1000 1800-550-1600 1800-550-2000 1800-550-2500 1950-800-1250

8|9

Bushing type EKTGDescription Technical data Highest voltage for equipment: Um Max. service voltage: line-ground Rated lightning impulse withstand voltage: 1.2/50 s Rated switching impulse withstand voltage: 250/2500 s Rated current and maximum service current: Ir ; Imax Routine Test voltage levels Power frequency withstand voltage dry: Up 50 Hz, 1min Maximum value of partial discharge Partial discharge extinction voltage Lightning impulse test voltage (BIL): 1.2/50 s Chopped lightning impulse test voltage: time to sparkover 26 s Type Test voltage levels Lightning impulse test voltage (BIL): 1.2/50 s Chopped lightning impulse test voltage: time to sparkover 26 s Switching impulse test voltage dry (SIL): 250/2500 s Dimensions D1 d1 S1 S2 F d2 d3 e D3 D4 i1 z1 a1 D5 D6 D7 D8 i2 z2 a2 L2 C.T. accommodation length Total length C.T. accommodation length Total length C.T. accommodation length Total length E L1 L E L E L mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm mm pos./ neg. pos./ neg. pos./ neg. pos./ neg. pos./ neg. kV pC kV kV kV kV kV kV kV A

362 210 1175 950 1000

362 210 1175 950 1600

362 210 1175 950 2000

362 210 1175 950 2500

420 242 1425 1050 1000

420 242 1425 1050 1600

420 242 1425 1050 2000

420 242 1425 1050 2500

420 242 1550 1175 1000

420 242 1550 1175 1600

420 242 1550 1175 2000

420 242 1550 1175 2500

550 318 1675 1175 1000

550 318 1675 1175 1600

550 318 1675 1175 2000

550 318 1675 1175 2500

550 318 1800 1300 1000

550 318 1800 1300 1600

550 318 1800 1300 2000

550 318 1800 1300 2500

800 462 1950 1550 1250

560 5 470 /1175 /1293

560 5 470 /1175 /1293

560 5 470 /1175 /1293

560 5 470 /1175 /1293

695 5 546 /1425 /1568

695 5 546 /1425 /1568

695 5 546 /1425 /1568

695 5 546 /1425 /1568

750 5 546 /1550 /1705

750 5 546 /1550 /1705

750 5 546 /1550 /1705

750 5 546 /1550 /1705

750 5 714 /1675 /1843

750 5 714 /1675 /1843

750 5 714 /1675 /1843

750 5 714 /1675 /1843

870 5 714 /1800 /1980

870 5 714 /1800 /1980

870 5 714 /1800 /1980

870 5 714 /1800 /1980

915 5 841 /1950 /2145

kV 1175/1293 1175/1293 1175/1293 1175/1293 1425/1568 1425/1568 1425/1568 1425/1568 1550/1705 1550/1705 1550/1705 1550/1705 1675/1843 1675/1843 1675/1843 1675/1843 1800/1980 1800/1980 1800/1980 1800/1980 1950/2145 kV /1422 /1422 950/1045 /1422 950/1045 /1422 /1724 /1724 /1724 /1724 /1876 /1876 /1876 /1876 /2027 /2027 /2027 /2027 /2178 /2178 /2178 /2178 /2360

kV 950/1045

950/1045 1050/1155 1050/1155 1050/1155 1050/1155 1175/1293 1175/1293 1175/1293 1175/1293 1175/1293 1175/1293 1175/1293 1175/1293 1300/1430 1300/1430 1300/1430 1300/1430 1550/1705

210 140 20 35 210 139 110 25 350 400 20 12 30 640 690 540 600 20 16 22.5 1050 100 690 2050 300 2250 600 2550

230 150 20 35 210 139 110 25 400 450 20 12 30 640 690 540 600 20 16 22.5 1050 100 690 2050 300 2250 600 2550

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 690 2085 300 2285 600 2585

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 690 2085 300 2285 600 2585

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 790 2185 300 2385 600 2685

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 790 2185 300 2385 600 2685

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 790 2185 300 2385 600 2685

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 790 2190 300 2390 600 2690

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 840 2235 300 2435 600 2735

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 840 2235 300 2435 600 2735

285 150 25 35 245 139 110 25 450 500 20 12 30 640 690 540 600 20 16 22.5 1050 100 840 2235 300 2435 600 2735

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 840 2240 300 2440 600 2740

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

355 170 30 35 250 139 110 25 550 600 25 16 22.5 640 690 540 600 20 16 22.5 1050 100 990 2390 300 2590 600 2890

450 200 40 40 250 200 170 25 620 700 25 16 22.5 650 700 550 610 25 16 22.5 1050 1100 600 3000

* Dimension not according to IEC 616369/IEC 62271-211

Detailed drawings for the dimensions of the table see traps of the front and back cover.

References

10 | 11

HSP bushings throughout the worldThe proverbial quality and reliability of HSP products has led to our condenser bushings being used in the leading energy projects worldwide.

The HSP product range:We cover all requirements of modern high-voltage technology up to the ultra-high operating voltages with our products and services. Our product portfolio is enhanced with tailored services for our own products as well as those from other manufacturers.

1

2

3

4

1 2 3

Transformer bushings Switchgear bushings Generator bushings HVDC bushings

800 kV bushing on a single-phase transformer in China

420 kV outdoor bushing at a GIS substation in Germany

420 kV bushing on a step-up transformer for a power plant in Germany

250 kV direct current bushing on a converter transformer in China

4

In addition to standardized products, we also offer individual special products for our customers that we manufacture with state-of-the-art production processes. These are usually developed by us in-house and tested in our fully equipped, internationally accredited test bay.

Published and copyright 2012:

HSP Hochspannungsgerte GmbH Camp-Spich-Str. 18 53842 Troisdorf-Spich Germany Phone: + 49 (0) 22 41/25 26-0 + 49 (0) 22 41/25 26-116 Fax: E-mail: contact@hspkoeln.de

Connection SF6-sideZ2 x 2

4 x M12 30 d2 e i2

2

d3

D7 D5 D6

Connection transformer side

i1S1 i1

1

Z1 x 1

D8

www.hspkoeln.de904

Pub. EKTG 72.5 800 kV 03/12-1500 TH 102-110888All rights reserved. Brands and trademarks used in this document are the property of HSP Hochspannungsgerte GmbH. 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.

D3 D4

Printed in Germany on elementary chlorine free paper.