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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
2 EasyDry transformer bushing EasyDry transformer bushing 3
4 EasyDry transformer bushing EasyDry transformer bushing 5
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
6 EasyDry transformer bushing EasyDry transformer bushing 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
8 EasyDry transformer bushing EasyDry transformer bushing 9
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
sealing areaØ 200 /270
12 holes Ø 16
Ø 3
35
Ø 2
90
Fig. 5
sealing areaØ 180 /230
8 holes Ø 16
Ø 2
90
Ø 2
50
Fig. 8
sealing areaØ 225 /270
12 holes Ø 16
Ø 3
35
Ø 2
90
Fig. 6
sealing areaØ 200 /230
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
DMB-OA 123-550 1ZCD066937 1ZCD061431 1ZCD066937 1ZCD061431 1ZCD066968 1ZCD063743
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
DMB-OA 145-650 1ZCD066940 1ZCD065299 1ZCD066940 1ZCD065299 1ZCD066970 1ZCD065303
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
DMB-OA 170-750 1ZCD066945 1ZCD065300 1ZCD066945 1ZCD065300 1ZCD066977 1ZCD065304
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
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