Dry type transformers Zaragoza Our product ABB Group

Dry type transformers Zaragoza Our product © ABB Group 2009 | Slide 1

Index What is a dry transformer? Vacuum cast range ABB general applications Standard technical features Zaragoza’s competitive edges Short facts about the vacuum cast coil technology Types and standards Environmental, climatic & fire classes Cast coil transformers for special applications Vibration proof Vacuum cast coil strong points A revolutionary concept Main advantages The most economical The product basic range Environmental classes E 2 & one step forward: E 2+ Features switching off endurance test Standard accessories Temperature control devices and sensors Special accessories Furthermore, any option is available See our advantages © ABB Group 2009 | Slide 2

Our product What is a dry transformer? © ABB Group 2009 | Slide 3 § ABB manufactures a transformer which does not use any kind of liquid for cooling, it has windings encapsulated under Vacuum, in epoxy resin reinforced with glass net. § It is the most technologically advanced design for extreme conditions. § ABB has flexibility to produce transformers for optimum space utilization, and special requirements. § These transformers meet strict parameters with respect to electrical system demands, are virtually maintenance free and are manufactured in accordance with industry and international standards including, IEC 60076 -11, ISO 9001 and ISO 14001.

Our product ABB general applications Marine Application HVDC light / Windpark Compact Substations (CSS) Connection MV Switchgear (GIS / AIS) Rural Electrification AIS Substations © ABB Group 2009 | Slide 4 Hydro automation & electrical systems Transformers Gas-insulated Switchgear (GIS) Industrial Electrification Utility communication Plant Automation & Electrical Systems Automation of Gas and Water Plants & Networks GIS Substations Urban Electrification Network Management Railway Power Supply (162/3 Hz)

Our product Zaragoza’s competitive edges § Most advanced production technologies to guarantee the best product quality. § § © ABB Group 2009 | Slide 5 § The most demanding quality control system to guarantee the total reliability of the product. The deepest experience in the design to guarantee the best technical solutions in all applications. § Probably the largest production center for dry type transformers in Europe. Present all over the world to guarantee the best after sales service. § ISO 9001, ISO 14001 and UNEEN ISO/IEC 17025 certifications.

Our product Types and designs § § © ABB Group 2009 | Slide 6 Types: § Standard three phase transformer. § Double High Voltage transformer. § Multi winding transformer. § Low Voltage transformer. § Autotransformer. § Drive systems transformers. § Excitation systems transformers. Standard designs: § High Voltage winding material: foil disks. § Low Voltage winding material: aluminum/copper foils. § Insulation class: F, H.

Our product Where we have experience © ABB Group 2009 | Slide 7 § Distribution applications. § Traction systems. § Rectifier system. § Marine applications (Propulsion & Distribution). § Wind power applications. § Cement industry. § Steel plants. § Oil & gas. § Chemical & pharmaceutical. § Metal & mining. § Pulp & paper. § Power plants & utilities. § Airports. § High rise buildings.

Our product Vacuum cast coil strong points Vacuum cast coil transformers are according to International standards. © ABB Group 2009 | Slide 8 § Stronger resistance against short-circuit stress. § Superior behaviour on load changes (thermal). § Linear distribution of BIL. § Highest possible security against cracks on coils. § No silicone during coil manufacturing. § Better performance under dynamic loads (mechanic). § Better performance under severe ambiental conditions (exceeding E 2). § More suitability for extreme environmental conditions.

Our product A revolutionary concept V alued points (ABB product) A ll accesories available C ertifications proving our quality U nder vacuum benefits (Very low partial discharges) U ndercut (New materials) M aintenance free C apable of withstanding all conditions (C 2, E 2+) A ttractive appearance S afety T ailored solutions C ontinuos improvements (> 52 k. V level insulation) O vervoltage transient design (> 20, 000 on/off) I mpulse lightening for high tensions (250 k. V BIL) L onger life (Class H) © ABB Group 2009 | Slide 9

Our product Main advantages: safe and environmental friendly © ABB Group 2009 | Slide 10 § Reduced environmental contamination. § Zero risk of leakage of flammable or contaminating substances. § Environmental safe in production. § Well suited to damp and contaminated areas. § No fire hazard. § Transformers are non flammable and self-extinguishing. § High resistance to short circuits. § High capacity to support overloads. § High performance in dealing with seismic phenomenon. § Capable of withstanding the most severe of rolling and vibrating conditions.

Our product Main advantages: Zaragoza´s product competitive edges © ABB Group 2009 | Slide 11 § The lowest partial discharge value thanks to the most advanced casting technology. § The typical partial discharges is below 5 p. C (maximum allowed 10 p. C). § Epoxy resin cast under vacuum avoids entry of moisture and protects against aggressive environments. § Unique coil finishing provides smooth surface eliminating dust accumulation. § Self-extinguishing in the event of fire or arcing and no gases released with potential danger. § Step lap core configuration granting lower values of no load losses, no load current and noise level.

Our product Dry transformers versus oil transformers The best alternative due to: © ABB Group 2009 | Slide 12 § Fire hazard § Safety for people and property § Respect for natural life § Suitable to operate in humid or heavily polluted environments (E 2). § Suitable for operation, transport and storage at ambient temperatures down to minus 25 ºC (C 2). § Restricted flammability, self fire extinction (F 1). § Emission of toxic substances and opacity of fumes is minimized (F 1). § Partial discharges bellow 5 p. C in average. § Withstand the same impulse test even for exposed situation. § Have more ability to withstand thermal and dynamic short circuit effects. § Mechanically stronger, safer against vibrations, earthquakes, etc. . § No liquid, neither leaks and no risk of polluting spills.

Our product Dry transformers versus oil transformers © ABB Group 2009 | Slide 13 § Suitable to operate in humid or heavily polluted environments (E 2). § Suitable for operation, transport and storage at ambient temperatures down to minus 25 ºC (C 2). § Restricted flammability, self fire extinction (F 1). § Emission of toxic substances and opacity of fumes is minimized (F 1). § Partial discharges bellow 5 p. C in average. § Withstand the same impulse test even for exposed situation. § Have more ability to withstand thermal and dynamic short circuit effects. § Mechanically stronger, safer against vibrations, earthquakes, etc. . § No liquid, neither leaks and no risk of polluting spills.

Our product The most economical © ABB Group 2009 | Slide 14 § Less space needed. § Less civil work needed. § No special safety features required. (fire detection) § Maintenance free. § Longer transformer life due to low thermal and dialectic ageing. § Can be installed closer to the point of consumption reducing load cable losses. § Optimal design subject to constant improvements in design as new materials become available. § Produced in high throughput, specialised and efficient ABB factories.

Our product The product basic range © ABB Group 2009 | Slide 15 § From 250 k. VA up to 40 MVA. § High voltage: up to 72. 5 k. V. § Low voltage: up to 36 k. V. § Classes: E 2, C 2, F 1. § Partial discharges: <10 p. C. § Ambient design: From -25 ºC up to 60 ºC. § Insulation: 155ºC (F), 180 ºC (class H). § Cooling: AN, ANAF (up to +40%), AFWF. § Enclosure protection degree: From IP 00 up to IP 54.

Our product Vacuum cast range Small cast coil © ABB Group 2009 | Slide 16 Dry SPT hi-T Plus

Our product Standard technical features – Small cast coil © ABB Group 2009 | Slide 17 § Standards IEC EN 60076 -11, CENELEC HD 464, DIN 42563 § Rated power § Rated voltage § Cooling § Protection degree § High voltage winding Encapsulated, Aluminium foil § Low voltage winding Prepreg layer between turns, Aluminium full width § Temperature rise § Insulation system temperature § Partial discharges up to 3, 15 MVA up to 36 k. V AN IP 00 100 K 155 ºC (Class F) < 10 p. C

Our product Standard technical features – Dry SPT © ABB Group 2009 | Slide 18 § Standards IEC EN 60076 -11, CENELEC HD 464, DIN 42563 § Rated power § Rated voltage § Cooling § Protection degree § High voltage winding Encapsulated, Aluminium § Low voltage winding Encapsulated, Aluminium § Temperature rise § Insulation system temperature § Partial discharges up to 40 MVA up to 72. 5 k. V AN IP 00 100 K 155 ºC (Class F) < 10 p. C

Our product hi-T Plus Standard technical features © ABB Group 2009 | Slide 19 § Standards IEC EN 60076 -11, CENELEC HD 464, DIN 42563 § Rated power § Rated voltage § Cooling § Protection degree § High voltage winding Aluminium § Low voltage winding Prepreg layer between turns, Aluminium full width Aluminium § Temperature rise § Insulation system temperature § Partial discharges up to 3. 15 MVA up to 24 k. V AN IP 00 100 K 180 ºC (Class H) < 10 p. C

Our product Short facts about the vacuum cast coil technology 100% turns 90% Low Voltage winding © ABB Group 2009 | Slide 20

Our product Environmental, climatic and fire classes Environment § E 0 Normal indoor installation, no condensation, no considerable pollution. § E 1 Limited pollution, occasional condensation eg off circuit periods. § E 2 Heavy pollution, frequent condensation. Climate § § © ABB Group 2009 | Slide 21 C 1 Lower ambient temperatures: § Operation -5 °C § Storage and transport -25 °C C 2 Lower ambient temperatures: § Operation -25 ºC/-25 ºC § Storage and transport

Our product Environmental, climatic & fire classes Fire © ABB Group 2009 | Slide 22 § F 0 No special requirements except typical characteristics for dry type transformers. § F 1 Increase demands. § All material practically free of halogens § Limited formation of fumes § Limited contribution with calorific energy to the source of fire § Self extinguishing transformer fire

Our product Environmental, climatic & fire classes Transformer inside the humidity chamber with saline fog, before environmental test performance. Zaragoza’s vacuum cast coil dry type transformers were certified for several tests by KEMA high voltage laboratory. § § Tests such as: § Dielectric routine rests. Thermal shock tests for class C 2 transformers. § § Lightning impulse tests. Environmental tests with additional specifications for class E 2 (E 2++) transformers. § All these tests were according to IEC 60076 -11 Standard plus additional requests. © ABB Group 2009 | Slide 23

Our product Vibration proof © ABB Group 2009 | Slide 24 § The vibration to which the transformer is exposed to during its lifetime, was summarized in an acceleration spectrum with the simulation of its life cycle loads. § Multi-axis vibration tests, and shock tests were performed as per IEC 68 -2 -6/59, German edition EN 60068 parts 2 -6 and 259 as well as particular customer’s requirements. § Extreme accelerations due to handling or harsh vibration were also considered in these tests.

Our product Environmental classes E 2 & one step forward: E 2+ § E 2 test is necessary when the transformer is going to be placed where frequent condensation or/and heavy pollution. § § § Condensation test: § 6 or more hours in the test chamber (condensation & humidity above 93%). § After 6 hours, the transformer is tested with induced voltage during 15 minutes at 1. 1 times the rated power. Humidity penetration test: § 144 hours inside the climatic chamber with air temperature at 50 3 ºC & relative humidity at (90 5)%. § After 3 hours in ambient conditions the transformer shall be subjected to routine insulation test at 80% of standard values. During any voltage application will not be approved neither breakdown nor flashover or any serious tracking. © ABB Group 2009 | Slide 25

Our product Environmental classes E 2 & one step forward: E 2+ Scope of supply: 3140 k. VA, Primary: 33000 V Secundary: 1000400 V Dyn 5 Sn: 87074 § E 2+ (Plus): In condensation test, water conductivity is kept at 1, 5 S/m, and dielectric tests are carried out as for neutral isolated system. § Step one: After 6 hours in condensation chamber, with water conductivity 1, 5 S/m passed dielectric tests at 1. 1 rated voltage, between line terminals and ground. § Step two: After 144 hours in climatic chamber passed routine dielectric tests at 80% of standard test values. Qualified to perform in the most severe environmental conditions © ABB Group 2009 | Slide 26

Our product Features switching off endurance test © ABB Group 2009 | Slide 27 § After 20. 000 switching off operations at full nap load voltage, the transformer does not show any increase of partial discharges, neither along the winding to the ground, partial discharges remained constant along the test what means that the transformer has not suffered any significant loss of life. § Our transformers are in good conditions very similar to a new one, and can be put in operation in a network which has the same conditions and capacity between the switchgear and transformer in a test circuit.

Our product Standard accessories 1 Terminal stip 9 2 Temperature 1 8 sensors 3 Earthing Terminals 2 4 Pulling eyes 5 Wheels 6 Fans (option) 7 Tappings / Off load tap changer 8 Lifting lugs 7 9 Rating Plate 6 3 © ABB Group 2009 | Slide 28 4 5

Our product Temperature control device and sensors TMD-T 4 and TMD-T 4 S Pt 100 © ABB Group 2009 | Slide 29 T- 154 NT- 935 T- 119 PTC 130 -150 ºC

Our product Special accessories Enclosures Anti vibrations devices Earthing switch © ABB Group 2009 | Slide 30 Surge arrester for HV and LV On load tap changer (OLTC) Plug in bushings Hydrocoolers Earthing bullet

Our product Special accessories Space heaters Fans forced air cooling Electrostatic screen © ABB Group 2009 | Slide 31 Current transformers

Our product Furthermore, any option is available © ABB Group 2009 | Slide 32 § Conductor material: aluminium / copper. § Low Voltage terminals located at the bottom of transformer. § Impregnated high voltage winding. § Encapsulated Low Voltage. § Delta connection encapsulated. § Plug-in connector. § Dual primary / secondary. § 6/12/24 pulse rectifying transformer. § Bus bar flanges can be accommodated.

Our product Main advantages Possibility to install any kind of accesories Step-lap configurate High impulse withstand through foil-disk winding Lowest partial discharge (>5 p. C) due to epoxy resin casted under vacuum (horizontal process) Unique coil finishing: Smooth surface that eliminates dust acumulation Dust / pollution resistance thanks to the sealed technology High capacity to withstand overloads due to high thermal innertia Self- extinguish Axial short-circuit forces retained & hight short circuit withstand © ABB Group 2009 | Slide 33 Aluminium foil disk in High Voltage winding Bidirectional wheels Radial short circuit forces retained

© ABB Group 2009 | Slide 34