easydry transformer bushing better performance made easy · 2018-05-10 · easydry transformer...

ABBPower and productivity for a better worldTM

EasyDry transformer bushingBetter performance made easy

2 EasyDry transformer bushing EasyDry transformer bushing 3

ABB, the world leader in high voltage bushing technologyGlobal experience and resources

than 40 years we have successfully produced tailor-made, high quality dry bushings. ABB is characterized by its out-standing technical performance and experience. During the long history of developing and producing dry bushings, ABB has always been well known for its innovation by setting new standards for dry bushings.

ABB is continuously striving for new, innovative solutions to meet our customers’ application needs. The continuous and determined work on research and development, involving the profound knowledge of the unique ABB R&D global network,

enables us to provide you with state-of-the-art dry bushing technology: EasyDry high voltage transformer oil-air bushings. This modern bushing technology sets new standards regard-ing quality, reliability, safety and lead time.

The EasyDry bushing family ideally fits into ABB’s product portfolio of environmental friendly and high quality com-ponents for the transmission and distribution of electrical energy.

In general, the aim of electric utilities is to continuously increase efficiency and performance of their assets in addition to the ambitious targets of improved availability, higher safety standards and cost reduction. ABB’s EasyDry bushing provides a valuable contribution to achieving better overall performance figures.

The EasyDry standard line will be the right choice when equipping your next transformer. Here we will tell you why.

The ABB group has more than 100 years of experience in different bushing technologies. This experience includes comprehensive Research and Development (R&D) and testing resources, especially in the areas of high voltage, engineering, materials research and applied physics. We produce premium quality bushings in seven locations all over the world. ABB Switzerland, Micafil, developed the first resin impreg-nated paper bushings in the 1960s, and since then has specialized in dry type bushing technologies. For more

ABB manufacturing locations for bushings: Alamo, TN, USA | OIP Guarulhos, Brazil | OIP Hefei, China | OIP, RIP Khotkovo, Russia | RIP Ludvika, Sweden | OIP, RIP Vadodara, India | OIP Zurich, Switzerland | RIP, RIS OIP = Oil Impregnated Paper bushings RIP = Resin Impregnated Paper bushings RIS = Resin Impregnated Synthetics R&D centers: Baden-Dättwill, Switzerland Bangalore, India Beijing, China Krakow, Poland Ladenburg, Germany Raleigh, USA Västerås, Sweden

Hefei, China

Vadodara, India

Khotkovo, Russia

Bangalore, India

Krakow, Poland

Västerås, Sweden

Ladenburg, Germany

Ludvika, Sweden

Alamo, TN, USA

Raleigh, USA

Guarulhos, Brazil

Zurich, Switzerland Beijing, China

Baden-Dättwill, Switzerland



Common specifications Application Transformer bushing, oil to air Classification Dry, fine capacitive graded, resin molded bushing Minimum ambient – 40 °C, lower temperatures on request temperature Altitude of installation <1000m, higher level of altitude on request Pollution level Very heavy Mounting angle Vertical to horizontal Measuring tap 2 kV Standards IEC 60137 (2008) and IEEE C57.19.00 (2004) and C57.19.01 (2000)

State of the art bushing technologyCompact and reliable design

EasyDry common specifications

1 Molding of condenser core | 2 Molding of silicone insulator 1 Preparation for type tests | 2 EasyDry bushing cross-section

1 2 1 2

EasyDry bushing cross-section 1. Copper terminal (air side) 2. Clamp 3. Silicone insulator 4. Condenser core 5. Mounting flange 6. Measuring tap 7. Current transformer extensions, if required 8. End shield

The EasyDry transformer bushing is a resin molded polymeric fiber bushing with a silicone rubber insulator. This means that the condenser core is molded in its final shape (picture 1) and the silicone rubber insulator is directly molded as one piece on the core (picture 2). In this way, the insulator and the condenser core become tightly bound to one another. The optimized process and high quality materials make the bushing partial-discharge free and ensure low dielectric losses. The bushing design is completely oil- and paper-free and does not contain water-absorbent materials. The EasyDry bushing consists of a resin molded condenser core, main flange and silicone rubber insulator. The condenser core is manufactured using aluminium tube or copper con-ductor and then wound with a fiber condenser core utilizing aluminum foils for electrical field control. The condenser core

is then molded under vacuum with a special epoxy resin into its final shape. Therefore the condenser core needs no machining. The molding is performed under vacuum, in a controlled and hermetically sealed environment. The aluminium flange is directly assembled on the condenser core with a multiple O-ring system creating an oil- and gas-tight sealing system. In contrast to some traditional designs, the bushing’s terminals are made of one piece. Both, the cable bolt and removable solid rod conductor, are fitted with a clamp at the top of the bushing. We are proud of our leading position in high voltage bushings by providing our customers with profound expertise in this state-of-the-art technology. This new bushing technology combines the best advantages of both OIP and RIP technologies.

1

2

4

6

8

3

5

7


Benefits of EasyDrySafe, reliable and easy

1

2

Excellent electrical and thermal properties– Partial-discharge free up to double service voltage− High thermal endurance (class E, 120 °C)− Low dielectric losses (tan δ < 0.40 %) Superb design, reliable performance– EasyDry bushings utilize only materials which are moisture resistant, making bushing storage and transportation much easier and practical− Easy handling and installation of the bushing thanks to the reduced number of components− Single-piece terminal without joints guarantees low resistance current path− One-piece, direct-molded silicone insulator provides superior moisture and contamination resistance

Oil- and paper-free bushing, highest operational safety– The EasyDry design effectively prevents explosions since they are oil- and pressure-free− The EasyDry bushing’s core material makes it fire-resistant − Hydrophobic, non-shattering silicone insulator with outstanding contamination performance Environmental friendly − The materials are selected to provide the lowest possible environmental impact over the whole product life cycle− Lower carbon footprint than other bushing technologies

Standard bushing with better than standard performanceEasyDry transformer bushings are specified and tested accord-ing to the IEC 60137 (2008) and IEEE C57.19.00 (2004) and C57.19.01 (2000) Standards. The bushings not only meet, but exceed the requirements in the relevant standards due to the low tangent delta and partial discharge performance. The minimum allowed ambient temperature of – 40 °C (lower temperatures on request) enables EasyDry to perform even in the most demanding conditions.

Please consult ABB Switzerland for conditions that are outside of the standard specification above.

1

3 4

EasyDry transformer bushing. Standard bushing with best benefits 1 Rain on the way to storage – no problem | 2 Hydrophobicity of EasyDry silicone insulator | 3 Preparation for temperature rise tests | 4 Micafil testing facilities

The EasyDry transformer bushing combines the benefits of RIP and OIP bushings into one compact product. The EasyDry bushings share the OIP performance having an excellent resistance to moisture absorption during storage and transportation, and at the same time provide the same excellent overload characteristics and thermal values you expect from an RIP bushing. Furthermore, the bushings are constructed of fire-resistant materials. This makes the bushing extremely safe for both personnel and systems. Easy to use, maintenance-free − EasyDry is maintenance- and inspection-free − Installation and transportation is possible at any angle


Accessories

Flange dimensions

Bushing dimensions

Top detail

Bottom detail – End shield Joint point of split removable solid rod conductorFor 24, 36, 52 and 72 kV with L6 = 0 and 100, the divided point of the solid rod conductor may be a few mm above the bushing flange according to Fig. 14 and the table.

Recommendation for bushing installation The distance from the bushing’s lower part to the earthed parts depends on the shape of the surrounding parts as well as on the quality and condition of the transformer oil. The recommended minimum distances A (mm) to be used under standard conditions are shown in Fig. 15 and the table below.

DMB-OA d6 (mm) Up (kV)* A (mm)

24, 36, 52 109 50 – 105 80

72.5 109 140 90

160 100

123 134 185 115

255 145

180 185 140

255 170

145 134 275 170

310 210

180 275 195

310 225

170 134 325 210

365 230

180 325 235

365 255

*transformer test voltage

DMB-OA L9 (mm)

24 85

36 85

52 65

72.5 30

Accessories and installation

d4

d4

8540 20

thickness a1

Ø 18 (2x)

d2

d2

65

d4

test tap test tap test tap

Fig. 1 Fig. 2 Fig. 3

silver plated

copper

D6 D6D6

D1 D1

D1

D5 D5 D5

Lt Lt Lt

125

125

125

L2 L2

L4L6 L6 L6

L16

L16

L16

18 18 18

20 20 20cable bolt,machined by customer

Fig. 9

Fig. 10

d8

c7c7

c6 c7

Lt

c6c6

d3

d3

d5

d5

d5

d6

d6

d6

L9

8540 20

thickness a1

L6 +

20

30°

A

d6

Fig. 11

Fig. 12

Fig. 13

Ø 18 (2x)

Fig. 14

Fig. 15

Fig. 16

65

d4

machined by customer

d8

Fig. 4

sealing areaØ 150 /165

6 holes Ø 16

Ø 2

25

Ø 1

85

Fig. 7


12 holes Ø 16

Ø 3

35

Ø 2

90

Fig. 5


8 holes Ø 16

Ø 2

90

Ø 2

50

Fig. 8


12 holes Ø 16

Ø 3

35

Ø 2

90

Fig. 6


8 holes Ø 16

Ø 2

90

Ø 2

50

L2

L5L5

10 EasyDry transformer bushing EasyDry transformer bushing 11 EasyDry transformer bushing 12

Technical data for bushing selection

EasyDry Electrical data Dimensions

Type IEC 60137 note 6 Current IEEE C57.19.01 note 6 Current Oil side Air side Flange Shield Weight

Out

line

dra

win

g nu

mb

er

Bus

hing

dim

ensi

ons

Rat

ed c

urre

nt

Cur

rent

con

duc

tor

Not

e 1

Rat

ed v

olta

ge U

r

Pha

se t

o gr

ound

U

r/√3

AC

tes

t vo

ltage

1 m

in.

Up

110%

of

tran

sfor

mer

tes

t vo

ltage

BIL

1.2

/50

μs

Max

. op

erat

ing

curr

ent

w

ith c

opp

er c

able

400

mm

2 ,

665

mm

2 an

d s

olid

co

nduc

tor

acc.

to

CT

sp

ace

(mm

)

Sys

tem

vol

tage

Pha

se t

o gr

ound

U

r/√3

AC

tes

t vo

ltage

1 m

in.

d

ry /

wet

Up

BIL

1.2

/50

μs

Max

. op

erat

ing

curr

ent

w

ith c

opp

er c

able

400

mm

2 ,

665

mm

2 an

d s

olid

co

nduc

tor

acc.

to

CT

sp

ace

(mm

)

Ther

mal

sho

rt-t

ime

curr

ent

– Ith

, 2s

.

Arc

ing

dis

tanc

e

Cre

epag

e d

ista

nce

Can

tilev

er t

est

load

1

min

.

Lt N

ote

2

L6 L16

Not

e 2

D1

d3

d4

d8

max

.

a1 Bot

tom

det

ail N

ote

5

L2 L4 L5 d2

D5

D6

max

of

insu

lato

r

Top

det

ail

Flan

ge d

imen

sion

s

d5

d6

c6 c7 L6 =

0 m

m N

ote

3

L6 =

600

mm

Not

e 3

Fig. A kV kV kV kV 0 100 200 300 400 500 600 kV kV kV kV 0 100 200 300 400 500 600 kA mm mm N mm mm mm mm mm mm mm mm Fig. mm mm mm mm mm mm Fig. Fig. mm mm mm mm kg kg

DMB-OA 24-150 1ZCD065297 1ZCD065297 1ZCD065301

1 2 3

1250 2000 2500

C R F

24 14 55 125 1425 2125 3100

1350 2050 3000

1275 2000 2925

1225 1950 2850

1150 1925 2775

1125 1875 2725

1075 1850 2700

25 16 60/50 150 1200 1950 3025

1175 1925 2925

1150 1900 2800

1100 1850 2725

1050 1800 2650

1000 1725 2575

950 1650 2525

25*

rate

d c

urre

nt

340 810 1250 1250 3150

824 824 815

S

tand

ard

CT

spac

e 0,

100

, 20

0, 3

00,

400,

500

, 60

0 m

m

120 108 108 108

50 50

–

45 45 52

42 42

–

– –

30

11 12 13

495 495 455

330 – –

70 70

–

40 40 50

100 100

60

240 240 240

9 9

10

4 4 4

65 65 –

109 109

–

80 80 –

84 84 –

17 23 29

24 39 50

DMB-OA 36-200 1ZCD063865 1ZCD063865 1ZCD065034

1 2 3

1250 2000 2500

C R F

36 21 77 170 1375 2175 3050

1300 2075 2975

1250 2000 2900

1200 1950 2850

1150 1900 2775

1100 1850 2725

1075 1825 2700

34.5 22 80/75 200 1200 2000 2975

1175 1950 2875

1150 1925 2775

1100 1850 2700

1050 1800 2625

1000 1725 2575

950 1650 2525

470 1285 1250 1250 3150

954 954 945

120 108 108 108

50 50

–

45 45 52

42 42

–

– –

30

11 12 13

625 625 585

460 – –

70 70

–

40 40 50

100 100

60

240 240 240

9 9

10

4 4 4

65 65 –

109 109

–

80 80 –

84 84 –

20 28 35

27 44 56

DMB-OA 52-250 1ZCD066925 1ZCD065298 1ZCD066925 1ZCD065298 1ZCD066965 1ZCD065302

1 1 2 2 3 3

800 1250 1250 2000 2000 2500

C C R R F F

52 30 105 250 925 1325 1600 2100 2400 2975

875 1275 1550 2000 2325 2875

850 1225 1500 1950 2275 2800

800 1175 1475 1900 2225 2725

775 1125 1425 1850 2175 2675

750 1075 1400 1800 2125 2600

725 1050 1400 1800 2100 2575

46 29 105/95 250 850 1200 1550 2000 2350 2950

800 1175 1500 1950 2275 2825

775 1125 1450 1875 2200 2750

725 1075 1400 1825 2125 2650

700 1050 1325 1750 2075 2575

675 1000 1275 1675 2025 2525

650 950

1225 1600 1975 2450

605 1760 1600 1600 1600 1600 2500 3150

1104 1104 1104 1104 1095 1095

140 108 133 108 133 108 133

38 50 38 50

– –

35 45 35 45 40 52

33 42 33 42

– –

– – – –

20 30

11 11 12 12 13 13

755 755 755 755 715 715

590 590

– – – –

70 70 70 70

– –

30 40 30 40 40 50

80 100

80 100

48 60

240 265 240 265 240 265

9 9 9 9

10 10

4 5 4 5 4 5

65 65 65 65 – –

109 109 109 109

– –

80 80 80 80 – –

84 84 84 84 – –

22 30 28 40 33 48

30 42 41 61 50 74

DMB-OA 72.5-350 1ZCD066933 1ZCD065039 1ZCD066933 1ZCD065039 1ZCD066966 1ZCD065044

1 1 2 2 3 3

800 1250 1250 2000 2000 2500

C C R R F F

72.5 42 155 325 950 1275 1575 2025 2375 2950

900 1225 1525 1975 2300 2875

850 1175 1475 1900 2250 2800

825 1125 1450 1850 2200 2725

775 1100 1425 1825 2150 2650

750 1050 1400 1800 2125 2600

725 1025 1375 1775 2075 2550

69 44 160/140 350 800 1175 1575 2025 2325 2900

750 1150 1500 1925 2250 2800

725 1100 1425 1850 2150 2700

700 1050 1375 1775 2100 2625

675 1025 1300 1700 2025 2550

650 975

1250 1650 2000 2475

625 925

1200 1575 1950 2425

800 2470 2000 2000 2000 2000 2500 4000

1334 1334 1334 1334 1325 1325

175 108 133 108 133 108 133

38 50 38 50

– –

35 45 35 45 40 52

33 42 33 42

– –

– – – –

20 30

11 11 12 12 13 13

950 950 950 950 910 910

785 785 –

– – –

70 70 70 70

– –

30 40 30 40 40 50

80 100

80 100

48 60

240 265 240 265 240 265

9 9 9 9

10 10

4 5 4 5 4 5

65 65 65 65 – –

109 109 109 109

– –

80 80 80 80 – –

84 84 84 84 – –

27 36 35 50 42 60

35 48 49 71 59 86


1 1 2 2 3 3

800 1000 1600 2000 2000 2500

C C R R F F

123 71 255 550 850 1225 1625 2050 2425 2975

825 1175 1550 2000 2375 2925

800 1150 1500 1925 2350 2875

775 1100 1450 1875 2325 2825

750 1075 1400 1800 2275 2800

725 1025 1350 1750 2250 2750

700 1000 1325 1725 2225 2725

92 73 185/155 450 800 1150 1475 1875 2350 3000

750 1100 1400 1800 2300 2900

725 1050 1350 1725 2250 2800

700 1000 1275 1675 2200 2725

650 950

1225 1600 2150 2675

625 925

1175 1550 2125 2625

600 875

1150 1500 2125 2600

1200 3895 3150 3150 3150 3150 4000 4000

1867 1867 1867 1867 1935 1935

310 133 153 133 153 133 153

38 50 38 50

– –

35 45 35 45 40 52

33 42 33 42

– –

– –

20 20 20 30

11 11 14 14 14 14

1340 1340 1340 1340 1300 1300

1175 1175

– – – –

70 70 70 70

– –

30 40 30 40 40 50

80 100

80 100

48 60

265 285 265 285 265 285

9 9 9 9

10 10

5 7 5 7 5 7

75 75

140 140 140 140

134 134 180 180 180 180

90 90

220 220 220 220

92 92

200 200 200 200

51 62 65 85 76

101

63 80 81

109 97

132


1 1 2 2 3 3

800 1000 1250 2000 2000 2500

C C R R F F

145 84 305 650 850 1175 1575 2000 2375 2875

800 1150 1525 1950 2325 2825

775 1100 1475 1875 2300 2800

750 1075 1425 1825 2275 2750

725 1025 1375 1775 2225 2700

700 1000 1325 1725 2225 2675

675 975

1300 1675 2200 2650

138 88 310/275 650 750 1100 1425 1800 2300 2825

725 1050 1375 1725 2250 2750

700 1000 1300 1675 2200 2700

675 950

1250 1625 2150 2650

650 925

1200 1550 2125 2600

625 900

1150 1500 2100 2550

600 850

1125 1450 2075 2525

1405 4615 3150 3150 3150 3150 4000 4000

2112 2112 2112 2112 2180 2180

360 153 178 153 178 153 178

38 50 38 50

– –

35 45 35 45 40 52

33 42 33 42

– –

– –

20 20 20 30

11 11 14 14 14 14

1535 1535 1535 1535 1495 1495

1370 1370

– – – –

70 70 70 70

– –

30 40 30 40 40 50

80 100

80 100

48 60

285 310 285 310 285 310

9 9 9 9

10 10

6 8 6 8 6 8

75 75

140 140 140 140

134 134 180 180 180 180

90 90

220 220 220 220

92 92

200 200 200 200

72 91 87

115 100 135

89 113 109 146 126 171


1 1 2 2 3 3

800 1000 1250 1600 2000 2500

C C R R F F

170 98 355 750 825 1150 1550 1950 2350 2875

800 1125 1475 1900 2300 2825

775 1075 1450 1850 2275 2775

750 1050 1400 1800 2250 2725

725 1025 1350 1750 2200 2700

700 975

1325 1700 2200 2675

675 950

1275 1650 2175 2650

161 102 365/315 750 725 1050 1400 1775 2275 2800

700 1025 1325 1700 2200 2750

700 975

1275 1625 2175 2675

675 950

1225 1575 2125 2625

650 900

1175 1525 2100 2600

625 875

1150 1475 2075 2550

600 850

1100 1450 2050 2525

1600 5270 4000 4000 4000 4000 5000 5000

2367 2367 2367 2367 2435 2435

420 153 178 153 178 153 178

38 50 38 50

– –

35 45 35 45 40 52

33 42 33 42

– –

– –

20 20 20 30

11 11 14 14 14 14

1730 1730 1730 1730 1690 1690

1565 1565

– – – –

70 70 70 70

– –

30 40 30 40 40 50

80 100

80 100

48 60

285 310 285 310 285 310

9 9 9 9

10 10

7 8 7 8 7 8

75 75

140 140 140 140

134 134 180 180 180 180

90 90

220 220 220 220

92 92

200 200 200 200

82 103

99 131 114 152

99 125 121 162 139 189

Notes 1. Current conductor C = Cable bolt R = Removable solid rod conductor F = Fixed conductor 2. The dimensions L and L16 in the table are valid for L6 = 0 mm. For L6 > 0 mm, add L6 to L and L16.

Type designationThe transformer bushing type designation is made up as follows:DMB-OA 36 – 200/1250

Rated current [A]

Lightning impulse voltage [kV]

Rated voltage [kV]

D = Dry | M = Molded | B = Bushing | O = Oil | A = Air

3. The weights in the table are valid for L6 = 0 and 600 mm. The bushing weight for other values of L6 are in the outline drawing. 4. All the dimensions in mm.5. Values for detail 12 for 123kV / 145kV / 170kV on request6. IEC 60137 (50 Hz) IEEE C57.19.01 (60 Hz)

ABBPower and productivity for a better worldTM

13 EasyDry transformer bushing

ABB Switzerland Ltd Badenerstrasse 780CH-8048 Zurich, SwitzerlandPhone +41 (0)58 586 03 33Fax +41 (0)58 586 04 44E-mail [email protected] www.abb.com/electricalcomponents

Note We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB Ltd. does not accept any responsibility whatsoever for poten- tial errors or possible lack of information in this document. We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents – in whole or in parts – is forbidden without prior written consent of ABB Ltd. Copyright© 2015 ABBAll rights reserved

Contact us

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easydry transformer bushing better performance made easy · 2018-05-10 · easydry transformer...

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