EasyDry transformer bushing Better performance made easy. Power and productivity for a better world TM ABB

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Clara Campbell
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1 EasyDry transformer bushing Better performance made easy Power and productivity for a better world TM ABB

2 ABB, the world leader in high voltage bushing technology Global experience and resources The ABB group has more than years of experience in different bushing technologies. This experience includes comprehensive esearch and Development (&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 impregnated paper bushings in the s, and since then has specialized in dry type bushing technologies. or more than years we have successfully produced tailor-made, high quality dry bushings. ABB is characterized by its outstanding 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 &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 regarding quality, reliability, safety and lead time. The EasyDry bushing family ideally fits into ABB s product portfolio of environmental friendly and high quality components 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. Ludvika, Sweden Ladenburg, Germany Baden-Dättwill, Switzerland Västerås, Sweden Krakow, Poland Khotkovo, ussia ABB manufacturing locations for bushings: Alamo, TN, USA OIP Guarulhos, Brazil OIP Hefei, hina OIP, IP Khotkovo, ussia IP Ludvika, Sweden OIP, IP Vadodara, India OIP Zurich, Switzerland IP, IS aleigh, USA Alamo, TN, USA Zurich, Switzerland Beijing, hina Hefei, hina OIP = Oil Impregnated Paper bushings IP = esin Impregnated Paper bushings IS = esin Impregnated Synthetics Vadodara, India Bangalore, India &D centers: Baden-Dättwill, Switzerland Bangalore, India Beijing, hina Krakow, Poland Ladenburg, Germany aleigh, USA Västerås, Sweden Guarulhos, Brazil EasyDry transformer bushing EasyDry transformer bushing

State of the art bushing technology ompact and reliable design EasyDry common specifications The EasyDry transformer bushing is a resin molded polymeric fiber bushing with a silicone rubber insulator.

In this way, the insulator and the condenser core become tightly bound to one another.

The bushing design is completely oil- and paper-free and does not contain water-absorbent materials.

The condenser core is manufactured using aluminium tube or copper conductor and then wound with a fiber condenser core utilizing aluminum foils for electrical field control.

The molding is performed under vacuum, in a controlled and hermetically sealed environment.

3 State of the art bushing technology ompact and reliable design EasyDry common specifications 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 ) and the silicone rubber insulator is directly molded as one piece on the core (picture ). 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 conductor 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 gastight 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 stateof-the-art technology. This new bushing technology combines the best advantages of both OIP and IP technologies. ommon specifications Application Transformer bushing, oil to air lassification Dry, fine capacitive graded, resin molded bushing Minimum ambient, lower temperatures on request temperature Altitude of installation <0m, higher level of altitude on request Pollution level Very heavy Mounting angle Vertical to horizontal Measuring tap kv Standards IE (0) and IEEE..00 (0) and..0 () EasyDry bushing cross-section. opper terminal (air side). lamp. Silicone insulator. ondenser core. Mounting flange. Measuring tap. urrent transformer extensions, if required. End shield Molding of condenser core Molding of silicone insulator Preparation for type tests EasyDry bushing cross-section EasyDry transformer bushing EasyDry transformer bushing

Benefits of EasyDry Safe, reliable and easy The EasyDry transformer bushing combines the benefits of IP and OIP bushings into one compact product.

characteristics and thermal values you expect from an IP bushing. urthermore, the bushings are constructed of fire-resistant materials.

Easy to use, maintenance-free EasyDry is maintenance- and inspection-free Installation and transportation is possible at any angle Excellent electrical and thermal properties Partial-discharge free

%) 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

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

4 Benefits of EasyDry Safe, reliable and easy The EasyDry transformer bushing combines the benefits of IP 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 IP bushing. urthermore, 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 Excellent electrical and thermal properties Partial-discharge free up to double service voltage High thermal endurance (class E, ) Low dielectric losses (tan δ < 0. %) 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 performance EasyDry transformer bushings are specified and tested according to the IE (0) and IEEE..00 (0) and..0 () 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 (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. EasyDry transformer bushing. Standard bushing with best benefits ain on the way to storage no problem Hydrophobicity of EasyDry silicone insulator Preparation for temperature rise tests Micafil testing facilities EasyDry transformer bushing EasyDry transformer bushing

Accessories Accessories and installation Bushing

Joint point of split removable solid rod conductor

solid rod conductor may be a few mm above the

d d machined by customer ecommendation for bushing

part to the earthed parts depends on the shape of

under standard conditions are shown in ig.

holes Ø Ø 0 / holes Ø copper d cable bolt, machined

Ø Ø Ø Ø Ø Ø DMB-OA (mm) Up (kv)* A (mm),, 0 0 ig.

5 Accessories Accessories and installation Bushing dimensions D D D L L Bottom detail End shield d Joint point of split removable solid rod conductor or,, and kv with = 0 and, the divided point of the solid rod conductor may be a few mm above the bushing flange according to ig. and the table. DMB-OA L (mm) c L D L D L D L d ig.. L test tap test tap test tap d ig. D D D c d ig. d d machined by customer ecommendation 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 ig. and the table below. ig. ig. ig. + lange dimensions Top detail Ø (x) Ø / holes Ø Ø / holes Ø Ø 0 / holes Ø copper d cable bolt, machined by customer d ig. thickness a A ig. Ø Ø Ø Ø Ø Ø DMB-OA (mm) Up (kv)* A (mm),, 0 0 ig. Ø 0 / holes Ø Ø Ø ig. Ø / holes Ø Ø Ø ig. silver plated ig. d d d c d ig. d Ø (x) thickness a ig. ig. ig. 0 *transformer test voltage EasyDry transformer bushing EasyDry transformer bushing

6 Technical data for bushing selection EasyDry Electrical data Dimensions Type IE note urrent IEEE..0 note urrent Oil side Air side lange Shield Weight Outline drawing number Bushing dimensions ated current urrent conductor Note ated voltage Ur Phase to ground Ur/ A test voltage min. Up 0% of transformer test voltage BIL./ μs Max. operating current with copper cable 0 mm, mm and solid conductor acc. to T space (mm) System voltage Phase to ground Ur/ A test voltage min. dry / wet Up BIL./ μs Max. operating current with copper cable 0 mm, mm and solid conductor acc. to T space (mm) Thermal short-time current Ith, s. Arcing distance reepage distance antilever test load min. Note Note D d d d max. a Bottom detail Note L L L d D D max of insulator Top detail lange dimensions d c = 0 mm Note = 0 mm Note ig. A kv kv kv kv kv kv kv kv ka mm mm N mm mm mm mm mm mm mm mm ig. mm mm mm mm mm mm ig. ig. mm mm mm mm kg kg DMB-OA - DMB-OA -0 DMB-OA - DMB-OA.- DMB-OA - DMB-OA - DMB-OA - ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD0 ZD00 ZD0 ZD00 ZD0 ZD Type designation The transformer bushing type designation is made up as follows: DMB-OA 0/ ated current [A] Lightning impulse voltage [kv] ated voltage [kv] D = Dry M = Molded B = Bushing O = Oil A = Air Notes. urrent conductor = able bolt = emovable solid rod conductor = ixed conductor. The dimensions L and in the table are valid for = 0 mm. or > 0 mm, add to L and / 0. / 0 0 0/ 0 / 0 0 / / 0 0 / The weights in the table are valid for = 0 and 0 mm. The bushing weight for other values of are in the outline drawing.. All the dimensions in mm.. Values for detail for kv / kv / kv on request. IE ( Hz) IEEE..0 ( Hz) * rated current Standard T space 0,, 0, 0, 0, 0, 0 mm EasyDry transformer bushing EasyDry transformer bushing EasyDry transformer bushing

7 ontact us ABB Switzerland d Badenerstrasse H- Zurich, Switzerland Phone + (0) 0 ax + (0) 0 info.micafil@ch.abb.com 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 d. does not accept any responsibility whatsoever for potential 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 d. opyright ABB All rights reserved 0/, ZD0A EN, subject to change. EasyDry transformer bushing Power and productivity for a better world TM ABB

O Plus Dry Bushing 25 kv system, 150 kv BIL, 3000 A

TYPE TEST REPORT O Plus Dry Bushing 25 kv system, 150 kv BIL, 3000 A 02 1 Abstract 02 2 Certification 03 3 Introduction 03 3.1 Description and ratings 03 3.2 Overview of tests 03 3.3 Applicable standards