TYPE TECHNICAL SPECIFICATIONS FOR AUXILIARY SERVICE …

TEİAŞ-MYD2004-005.1

TYPE TECHNICAL SPECIFICATIONS FOR AUXILIARY SERVICE POWER TRANSFORMERS WITH EXPANSION TANK

(MV/LV)

The original version of this technical specification has been prepared in Turkish and in case of any inconsistency between English and Turkish, the Turkish language shall prevail.

REVISION: JULY 2015/İDB-5A

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Type Technical Specifications For Auxiliary Service Power Transformers With Expansion Tank (MV-LV)


(MV/LV) 1. GENERAL .............................................................................................................. 1

1.1. Subject and Scope ............................................................................................ 1 1.2. Standards and Documents ................................................................................ 1 1.3. Operational Conditions ...................................................................................... 5

2. TECHNICAL CHARACTERISTICS ........................................................................ 6 2.1. Type .................................................................................................................. 6 2.2. Electrical characteristics .................................................................................... 6

2.2.1. Operational Regime ...................................................................................... 9 2.2.2. Operation under Overvoltage ...................................................................... 9

2.2.3. Temporary Overloading ................................................................................ 9 2.2.4. Tolerances .................................................................................................... 9

2.3. Structural Characteristics .................................................................................. 9

2.3.1. Magnetic Circuit (core) ................................................................................. 9 2.3.2. Windings ..................................................................................................... 10 2.3.3. Winding Insulation ...................................................................................... 10

2.3.4. Tap Changer .............................................................................................. 10 2.3.5. Tank ........................................................................................................... 11 2.3.6. Radiators .................................................................................................... 12

2.3.7. Oil Expansion Tank .................................................................................... 12 2.3.8. Plug-in Insulators (Bushings) and Terminals .............................................. 12

2.3.9. Cable Box ................................................................................................... 13 2.3.10. Protection and Signal Equipment ............................................................. 13 2.3.11. Isolation Oil ............................................................................................... 14

2.3.12. Arrangement of Top Cover and Dimensions and Marking the Connection Ends ..................................................................................................................... 14

2.3.13. Nameplate ................................................................................................ 15 2.3.14. Precautions Against Corrosion ................................................................. 15

2.3.14.1 General ............................................................................................... 15

2.3.14.2 Painting ............................................................................................... 15 2.3.14.3 Galvanizing ......................................................................................... 16

3. TESTS .................................................................................................................. 16 3.1. Tests on compenents at factory ...................................................................... 17 3.2. Tests on fully assembled transformer ............................................................. 17

3.3. Type Tests ...................................................................................................... 17 3.4. RoutineTests ................................................................................................... 18 3.5. Oil Tests .......................................................................................................... 19 3.6. Field tests ........................................................................................................ 20 3.7. Sampling ......................................................................................................... 21

4. MATTERS RELATED WITH THE TESTS AND ACCEPTANCE CRITERIA ....... 21 4.1. Tests ............................................................................................................... 21

4.1.1. Type Tests .................................................................................................. 21 4.1.2. Routine Tests ............................................................................................. 22 4.1.3. Acceptance Tests ....................................................................................... 22

4.2. Acceptance Criteria ......................................................................................... 22 4.3. Acceptance Procedure .................................................................................... 23

ANNEX –I/A ............................................................................................................. 24

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AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK (MV/LV) (33/0.4 kV, 160 KVA) LIST OF WARRANTED CHARACTERISTICS ...... 24 ANNEX –I/B ............................................................................................................. 28

AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK (MV/LV)(33/0.4 kV, 250 KVA)LIST OF WARRANTED CHARACTERISTICS ......... 28 ANNEX–I/C .............................................................................................................. 32 AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK (MV/LV) (33/0.4 kV, 500 KVA) LIST OF WARRANTED CHARACTERISTICS ....... 32

ANNEX- II ................................................................................................................. 36 AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK (MV/LV)LIST OF DEVIATIONS ................................................................................ 36

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(MV/LV)

1. GENERAL 1.1. Subject and Scope These specifications cover the technical characteristics, tests and conditions of supply of three phase, oil submerged Auxiliary Service MV/LV Power Transformers with Expansion Tank that are exposed to atmosphere and that have a rated voltage up to 36 kV and rated power from 50 kVA up to 1600 kVA, which will be used for meeting the internal needs of Transmission Centers. Unless otherwise specified in the Specifications and its annexes, the Auxiliary Service MV/LV Power Transformers with Expansion Tank shall be provided in the form of an oil filled complete unit together with all equipment indicated in the specifications. The types and technical characteristics of Auxiliary Service MV/LV Power Transformers with Expansion Tank that will be provided are indicated in the LIST OF WARRANTED CHARACTERISTICS. In the following sections of these specifications, only the expression “Transformer” shall be used instead of the expression “Auxiliary Service MV/LV Power Transformer with Expansion Tank”. 1.2. Standards and Documents Unless otherwise specified, the design, production and tests of the transformer shall be performed taking the latest editions of the following standards and/or documents into consideration.

Standard No (TSE)

Standard No (IEC)

Standard Name

ISO 9001:2008 Quaity Management System Certificate

TS EN 60076-1 IEC 60076-1 EN 60076-1

Güç transformatörleri. Bölüm 1: Genel (Powertransformers - Part 1: General)

TS EN 60076-2 EN 60076-2 Güç transformatörleri - Bölüm 2: Sıvıya Daldırılan Transformatörler İçin Sıcaklık Artışı

TS 10902 EN 60076-3

IEC 60076-3, EN 60076-3

Güç transformatörleri - Bölüm 3: Yalıtım seviyeleri, dielektrik deneyler ve havadaki haricî yalıtma aralıkları (Powertransformers - Part 3: Insulation levels, dielectric tests and external clearances in air)

TS EN 60076-4 IEC 60076-4, EN 60076-4

Güç transformatörleri – Bölüm 4: Yıldırım ve anahtarlama darbe deneylerine kılavuz – Güç transformatörleri ve reaktörler (Powertransformers - Part 4: Guide to the lightning impulse and switching impulse testing

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– Power transformers and reactors)

TS EN 60076-5 IEC 60076-5, EN 60076-5

Güç transformatörleri- Bölüm 5: Kısa devreye dayanım yeteneği (Power Transformers Part 5:Ability To Withstand Short-Circuit)

IEC 60076-7 Power TransformersPart 7: Loading Guide For Oil-Immersed Power Transformers

IEC 60076-8 Güç transformatörleri - Bölüm 8 : Uygulama Rehberi (PowerTransformers Part 8:Application Guide)

TS EN 60076-10

IEC 60076-10, EN 60076-10

Güç Transformatörleri - Bölüm 10: Ses Seviyelerinin Belirlenmesi (PowerTransformers Part 10: Determination Of Sound Levels)

TS EN 50464-1 EN 50464-1

En yüksek gerilimi 36 kV’u geçmeyen teçhizat için 50 kVA’dan 2500 kVA’ya kadar olan üç fazlı 50 Hz yağlı dağıtım transformatörleri - Bölüm 1: Genel şartlar Three phase 50 Hz oil distribution transformers for equipment with maximum voltage not exceeding 36 kV – Part 1: General conditions

TS EN 60445 EN 60445

İnsan-makina arayüzü, işaretlemesi ve tanıtımı için temel ve güvenlik prensipleri - Donanım bağlantı uçlarının, iletken sonlandırma düzenlerinin ve iletkenlerin tanıtımı Basic and security principles for man-machine interface, marking and introduction

TS EN 50180 EN 50180

Geçiş izolâtörleri - Sıvı ile doldurulmuş transformatörler için kullanılan - Gerilimi 1 kV’un üstünde 52 kV’a kadar akımı 250 A’den 3,15 kA’e kadar Plug-in type insulators – Used for liquid filled transformers – voltage over 1 kV up to 52 kV and current from 250 A up to 3,15 kA

TS EN 50386 EN 50386

Sıvı dolgulu transformatörler için 1kV'a kadar ve 250 A ilâ 5 kA'lik geçit izolatörleri Plug-in type insulators up to 1kV and 250 A to 5 kA range for liquid filled transformers

TS EN 50464-2-1

EN 50464-2-1

En yüksek gerilimi 36 kV’u geçmeyen teçhizat için 50 kVA’dan 2500 kVA’ya kadar olan üç fazlı 50 Hz yağlı dağıtım transformatörleri - Bölüm 2-1: Yüksek gerilim ve/veya alçak gerilim tarafında kablo kutuları olan dağıtım transformatörleri - Genel kurallar Three phase 50 Hz oil distribution transformers from 50 kVA up to 2500 kVA for equipment with maximum voltage not exceeding 36 kV – Part 2-1: Distribution transformers with cable boxes on high voltage and/or low voltage side – General Rules

TS EN 50464-2-2

EN 50464-2-2 En yüksek gerilimi 36 kV’u geçmeyen teçhizat için 50 kVA’dan 2500 kVA’ya kadar olan üç fazlı

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50 Hz yağlı dağıtım transformatörleri - Bölüm 2-2: Yüksek gerilim ve/veya alçak gerilim tarafında kablo kutuları olan dağıtım transformatörleri - EN 50464-2-1'deki kuralları karşılayan dağıtım transformatörlerinde kulllanım için Tip 1 kablo kutuları

TS EN 50464-2-3

EN 50464-2-3

En yüksek gerilimi 36 kV’u geçmeyen teçhizat için 50 kVA’dan 2500 kVA’ya kadar olan üç fazlı 50 Hz yağlı dağıtım transformatörleri - Bölüm 2-3: Yüksek gerilim ve/veya alçak gerilim tarafında kablo kutuları olan dağıtım transformatörleri - EN 50464-2-1'deki kuralları karşılayan dağıtım transformatörlerinde kulllanım için Tip 2 kablo kutuları Three phase 50 Hz oil distribution transformers from 50 kVA up to 2500 kVA for equipment, whose maximum voltage does not exceed 36 kV – Part 2-3: Distribution transformers with cable boxes on high voltage and/or low voltage side – Type 2 cable boxes for use in distribution transformers complying with the rules in EN50464-2-1

TS EN 60641-1 IEC 60641-1, EN 60641-1

Elektriksel Amaçlı Presli Karton ve Presli Kağıt Özellikleri- Bölüm:1 Tarifler ve Genel Kurallar (Pressboard and presspaper for electrical purposes - Part 1: Definitions and general requirements)

TS EN 60641-2 IEC 60641-2, EN 60641-2

Elektriksel Amaçlar İçin Presli kağıt ve presli karton'da Bulunması Gereken Şartlar-Bölüm 2: Deney Metotları (Pressboard and press paper for electrical purposes - Part 2: Methods of tests)

TS EN 60085 IEC 60085, EN 60085

Elektrik yalıtımı – Isıl değerlendirme ve gösteriliş (Electrical insulation – Thermal evaluation and designation)

TS EN 60068-3-3

IEC 60068-3-3, EN 60068-3-3

Çevre Şartlarına Dayanıklılık Deney-Bölüm 3: Kılavuz, Cihazlar İçin Sismik Deney Metotları (Environmental testing - Part 3: Guidance. Seismic test methodsforequipment)

TS 8756 EN 60721

IEC 60721-1 Çevre Şartlarının Sınıflandırılması (Classification Of EnvironmentalConditions)

TS EN 60214-1 IEC 60214-1

Kademe Değiştiriciler - Bölüm 1: Performans Özellikleri Ve Deney Metotları (Tap-ChangersPart 1: Performance Requirements And Test Methods)

TS IEC 60214-2 IEC 60214-2 Kademe değiştiriciler - Bölüm 2 : Uygulama kılavuzu (Tap-Changers - Part 2: Application Guide)

TS 3033 EN 60529

IEC 60529 Mahfazalarla Sağlanan Koruma Dereceleri (Ip Kodu) (Elektrik Donanımlarında) (Degrees Of

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ProtectionProvidedByEnclosures (IP Code))

TS EN 61672-1 IEC 61672-1 Elektro-Akustik – Ses Seviye Ölçerleri – Bölüm 1: Özellikler (Electroacoustics - Sound Level Meters - Part 1: Specifications

TS EN 60947-1 IEC 60947-1

Alçak Gerilim Anahtarlama Düzeni Ve Kontrol Düzeni - Bölüm 1: Genel Kurallar (Low-Voltage Switchgear And Controlgear - Part 1: General Rules)

TS EN ISO 1461

Demir Ve Çelikten İmal Edilmiş Malzemeler Üzerine Sıcak Daldırılma İle Yapılan Galvaniz Kaplamalar - Özellikler Ve Deney Metotları Galvanizing with hot dipping method on iron and steel materials – Characteristics and Test Methods

TS EN ISO 2409

IEC 2409 Boyalar ve vernikler - Çapraz kesme deneyi Paints and varnishes – cross cutting test

TS 595 EN 60137

IEC 60137

1000 Volttan yukarı alternatif gerilimlerde kullanılan geçit izolatörleri (buşingler). (Insulated bushings for alternating voltages above 1 000 V)

TS 623 EN 60296

IEC 60296

Mineral Yalıtım Yağları – Kullanılmamış – Elektroteknik Uygulamalar İçin – Anahtarlama Düzeni Ve Transformatörlerde Kullanılan (Fluids For Electrotechnical Applications-Unused Mineral Insulating Oils For Transformers and Switchgear)

TS EN 60567 IEC 60567

Yağlar Elektrikli Cihazlar İçin- Çözünmüş Ve Serbest Gaz Analizleri İçin Yağ Ve Gaz Numunesi Alma Kılavuzu (Oil-Filled Electrical Equipment – Sampling Of Gases And Oil For Analysis Of Free And Dissolved Gases – Guidance)

TS EN 60599 IEC 60599

Mineral Yağ İle Doldurulmuş Kullanımdaki Elektrikli Cihazlar – Çözünmüş Ve Serbest Gazların Tayin Sonuçlarının Cihazın Durumunun Değerlendirilmesinde Kullanılması Kılavuzu (Mineral Oil-Impregnated Electrical Equipment In Service - Guide to the Interpretation Of Dissolved And Free Gases Analysis)

TS EN 50216-4/DIN

Güç transformatörleri ve reaktör ara bağlantı parçaları-Bölüm 1:Genel( PowerTransformerand reaktör fittings Part1 :General

TS IEC 60815 IEC 60815-2

Kirlenme Şartlarına Göre İzolatörlerin Seçilme Kuralları Kılavuzu (Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 2: Ceramic and glass insulators for a.c.

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systems)

IEEE Std. C57.12.00

IEEE Standart for General for Liquid immersed Distribution, Power, RegulatingTransformers

TEİAŞ New İsolation oil Purchase Specifications (attached to the specifications.)

TEİAŞ Specifications on Oil Belonging to New Transformer Filled with New İsolation oil (attached to the specifications.)

Electrical accessories, components and other auxiliary equipment shall be compliant with the relevant TSE or IEC standards even if not indicated in the above standards. In relation with the materials, for which those conditions do not exist, the bidder shall propose applicable standards, provided that the approval of the purchaser is obtained. If equivalent or other superior standards are applied, their copies in Turkish and/or English shall be submitted together with the bid. All chemical, physical and dielectric characteristics of the materials used in the production of transformers shall comply with the characteristics prescribed in the relevant ASTM (American Society for Testing and Materials) or DIN (Deutsches Institut für Normung) or norms of European Union Countries. If the above standards and/or documents are modified at the stages after the stage of opening the bids received for transformers, the modification or edition that was in force on the date of bid shall apply. 1.3. Operational Conditions Unless otherwise specified, the transformers shall be suitable for use under the following operational conditions. The following conditions are normal operational conditions and the values in the Technical Specifications and their annexes are given in accordance with those conditions. If the Purchaser has requests other than those conditions, the Manufacturer shall perform its works in compliance with the relevant standards taking such requests into consideration. The changes that may occur in the Technical Specifications, and if any, in the design, shall be submitted to the approval of the Purchaser.

OPERATIONAL CONDITIONS

INDOOR OUTDOOR

Elevation 1000 m unless otherwise specified

Ambient temperature

-Minimum - 25 °C - 25 °C

-Maximum +40 °C +45 °C

-24 –hour average : under +35 °C : under +35 °C

- Annual average + under 25 C + under 25 C

Ambient air pollution (*)

Icing - Class 10, 10 mm

Wind pressure - 70 kg/m2 on round surface

120 kg/m2 on flat surface

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120 kg/m2 on flat surface

Susceptibility to industrial pollution

Yes (heavy pollution) Yes (heavy pollution)

Maximum relative humidity (24 –hour average)

% 95 % 95

Exposure to earthquake (**)

- horizontal acceleration 0.5 g at ground level (for outdoor and indoor types)

-vertical acceleration 0.25 g (for outdoor and indoor types)

Maximum solar radiation 500 W/m² 1000 W/m²

Lightning strike probability

- Yes

(*) It shall be indicated in the List of Warranted Characteristics by the Purchaser. (**) Auxiliary service power transformers shall withstand horizontal and vertical earthquake acceleration values and shall be designed to prevent damage to any of its units; the designs, drawings and materials necessary for the installation of auxiliary service power transformers at their place of operation and the earthquake withstand calculations of auxiliary service power transformers shall be submitted by the Contractor.

2. TECHNICAL CHARACTERISTICS The transformers included in the scope of these specifications shall be used as auxiliary service transformers at the transmission centers and shall have the following technical characteristics unless otherwise specified in the List of Warranted Characteristics. 2.1. Type - Three phase, two winding, - Oil (mineral oil) immersed, exposed to atmosphere with open expansion tank - Natural oil circulation, natural air cooling (ONAN), - Voltage regulating in no load position, - Outdoor or indoor. 2.2. Electrical characteristics - Rated frequency : 50 Hz(*) - Rated powers : 50-100-160-250-400-500-630 800-1000-1250-1600 kVA - Maximum system voltages

Primary : 7.2 - 12 - 17.5 - 36 kV Secondary : 1.1kV

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- Rated voltages

MV winding (main tap) : 6.3- 10.5- 15.8 - 33 kV LV winding : 400/231 V

-No load voltage regulation

Setting winding : on MV side Setting class : constant flux (TS EN 60076-1-

CFVV)

- Voltage setting range and tap number

Rated voltage (kV) 6.3-10.5-15.8 33

Setting area ± 2 x 2.5% 30-31.5-33-34.5-36

Tap number 5 5

No load transformer ratio (kV) ± 2x2.5%/0,4 30-31.5-33-34.5-36/0.4kV

- Setting tap powers

6.3-10.5-15.8kV transformers : Equal to rated power at all taps

33kV transformers : Equal to rated power between 30- 36kV

- Temperature rise limits (Unless otherwise specified in warranted characteristics)

Indoor Outdoor

For winding 65 K 60 K

At top oil level 60K 55 K

- Connection Group : Dyn11,Dyn5 - Short Circuit Impedance Voltage (at 75°C, in the main tap)

Short Circuit Impedance Voltage (%Uk)

Transformer Power (kVA) 6.3-10.5-15.8 kV 33 kV

Up to 630 kVA (including 630 kVA) 4 4.5

Over 630 kVA 6 6

- Short Circuit Thermal Strength The period of current to be used in the calculation of thermal strength against short circuit must be 2 seconds. - Rated Insulation Levels i) MV Winding

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Rated voltage (kV) 6.3 10.5 15.8 33

Impulse withstand voltage (kV-peak)

(1.2 - 50s) 60 75 95 170

One minute period power frequency withstand voltage (kV-effective)

20 28 38 70

ii) LV Winding

One minute period power frequency withstand voltage (kV-effective) : 3 kV

- Audible sound level at the top value of magnetic flux The minimum values included in TS EN 50464-1 standard are selected.

Sound power levels (dB)

Transformer power (kVA)

50 100 160 250 400 500 630 800 1000 1250 1600

6.3-10.5-15.8kV 39 41 44 47 50 51 52 53 55 56 58

33kV 50 54 57 60 63 64 65 66 67 68 69

NOTE: The values in the table are the maximum values. No tolerance shall be applied and in case the limits are exceeded, the transformers shall be rejected. - Losses (TS EN 50464-1)

Rated voltage (kV) Rated Power (kVA) Idle Losses (W) Load Losses (W)

6.3-10.5-15.8

50 90 750

100 145 1250

160 210 1700

250 300 2350

400 430 3250

500 510 3900

630 600 4600

800 650 6000

1000 770 7600

1250 950 9500

1600 1200 12000

Rated Voltage (kV) Rated Power (kVA) Idle Losses (W) Load Losses (W)

33

50 160 1050

100 270 1650

160 390 2150

250 550 3000

400 790 4150

500 940 5000

630 1100 5500

800 1300 7000

1000 1450 8900

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1250 1750 11500

1600 2200 14500

NOTE: The values in the table are the highest values. No tolerance shall be applied and in case the limits are exceeded the transformers shall be rejected. (*) Frequency variation range: Unless otherwise specified in the Electrical Grid Regulation, the Transformers shall be designed so as to be operable continuously in 49-50.5 Hz frequency range, and taking into consideration that frequency can increase up to 52.5 Hz or decrease down to 47.5 Hz in extraordinary conditions, they shall be operable for 10 minutes in 52.5 Hz-51.5 Hz frequency range, 1 hour in 50.5 Hz-51.5 Hz frequency range, 1 hour in 48.5 Hz-49 Hz frequency range, 20 minutes in 48 Hz-48.5 Hz frequency range, 10 minutes in 47.5 Hz-48 Hz frequency range being connected to the transmission grid. 2.2.1. Operational Regime The transformers shall be suitable for continuous operation under 100% unbalanced loading. 2.2.2. Operation under Overvoltage Transformers shall be suitable for operation as follows,

So as to give rated current at a voltage equal to 105% of the rated voltage, In no load position equal to 110% of the rated voltage.

2.2.3. Temporary Overloading It shall be compliant with IEC 60076-7. 2.2.4. Tolerances If the values of the transformers included in the scope of the order found as the result of the test are the same as the values warranted by the Manufacturer within the tolerances indicated below, the transformers shall be accepted to be compliant with these specifications.

No load transformer ratio : ± % 0.5 (In the main tap)

Short circuit impedance at rated current (in the main tap) : ± % 10

Idle current : + % 30 2.3. Structural Characteristics 2.3.1. Magnetic Circuit (core)

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The core shall be made of high quality, cold-extruded silica sheet steel having smooth surfaces, whose crystals are oriented and which has high magnetic permeability. The attachments shall be cut at 45° and step-lap technology shall be applied. Each plate shall have insulation that will not deteriorate under pressure and under the effect of hot oil. The sheet steel constituting the core and their insulation materials shall be designed so as not to allow the occurrence of harmful changes in the physical or electrical characteristics of the transformer for its entire life. İron bolts shall not pass through layers constituting the core and metal sheet constituting yoke legs . The core structure shall be so as to require the disassembly of minimum number of layers in the disassembly and replacement of windings. Core plates and windings shall be appropriately supported to ensure protection against bending and to prevent movement during transportation and under short circuit conditions that may be encountered. Special side supports shall be placed in each corner to prevent the movement of the core during transportation. 2.3.2. Windings The windings and winding connections shall be designed and produced so as to withstand the thermal and dynamic forces that may occur on transformer terminals, the insulation tests indicated in the specifications, overloading conditions without damage. 2.3.3. Winding Insulation High quality, minimum class A pure cellulose paper and presspan insulation materials shall be used for winding insulation. The neutrals of LV windings shall be insulated at the same insulation level as the line ends. After the windings are dried, tank oil filling operation shall be performed in vacuum. 2.3.4. Tap Changer The MV winding of all transformers shall have the no load tap changer having the characteristics indicated in the List of Warranted Characteristics. Tapping coil and the tap changer shall be able to withstand high voltage impulses, overload currents, short circuit currents without any damage. Tap changing operation shall be performed with a control mechanism mounted on the top cover of the tank. The control mechanism’s tap winding numbered 1 shall be marked so as to show the minimum number of windings and the tap indicator shall be equipped with a stop slot for each tap.

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2.3.5. Tank The tank and cover shall be constructed with a strong structure using high quality steel plates and with a qualified workmanship and there shall be a chassis carrying the complete weight of the transformer on four wheels on the tank bottom. The bolts to be used as outside connection members shall be made of stainless or galvanized steel. The cover shall be connected to the tank using bolts and cork seal of minimum neoprene quality shall be used for tightness. Welding works shall be performed by applying dual weld whenever necessary for tightness in compliance with the standards and all welds shall be subjected to tightness test. All seals to be used to ensure oil tightness shall be made of materials that are resistant against isolation oil and heat and that do not degrade the oil quality. The metal continuity between the parts constituting the tank and various pipes etc. must be performed so as to ensure that all of them are at the same potential. The following mechanisms and equipment shall be provided on the tank. - 2 lifting hooks to safely lift the transformer, to take the core and windings from the

container together with the cover, - 4 flat carrying wheels, which are adjustable in two axis directions perpendicular to

each other, which are lockable and whenever necessary, detachable. - Thermometer pocket (for 400 kVA and smaller power transformers and compliant

with TS EN 50216-4/DIN EN 50216-4 “Power Transformers and Reactor Parts –Part 4:Basic Accessories (Grounding connection end, discharge and charge apparatuses, thermometer pocket, wheel mechanism)” standard)

- No load voltage regulation mechanism - Two bolted type grounding terminals, one on the cover and the other on the

bottom side face, made of stainless steel shall be provided and shall be marked with a ground symbol.

- Valves - For 500kVA and bigger power transformers: a) Valve for oil discharge located approximately 10 cm lower than the container ceiling, (except corrugated container), b) 1 oil discharge valve approximately 2-3 cm higher than the container bottom (shall be suitable for oil discharge.)

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- For 400 kVA and smaller power transformers: 1 oil sampling and oil discharge valves 2-3 cm above the container bottom 2.3.6. Radiators The transformers shall be equipped with fixed flat radiators fastened on the tank in accordance with their production structures for cooling. The tank with corrugated walls shall also be acceptable. Corrugated wall fixed flat radiator sheet plate thicknesses shall not be less than 1.2 mm. 2.3.7. Oil Expansion Tank The transformers shall be equipped with an oil expansion tank of appropriate capacity and the following mechanisms shall be provided on the expansion container. - Oil sedimentation mechanism, - Oil discharge valve (the 500 kVA and higher power corrugated container transformers shall also be suitable for oil discharge.), - Oil discharge plug, - Magnetic oil level indicator, - Air drier and connection flange, - Buchholz relay on the expansion container and the tank on the pipe connection (on units of 500 kVA and higher). 2.3.8. Plug-in Insulators (Bushings) and Terminals Unless otherwise specified in the List of Warranted Characteristics, phase and neutral ends of MV and LV windings shall be taken out with ceramic plug-in insulators having the same insulation level as the relevant winding. MV Plug-in insulators and terminals shall be open type or plug-in type, outside cone type as indicated in the List of Warranted Characteristics. Unless otherwise specified in the List of Warranted Characteristics, open type plug-in type insulators shall be used. MV plug-in type insulators shall be equipped with arc horns with adjustable jump gaps. The minimum creepage distance for the open type MV plug-in type insulators shall be selected by the PURCHASER in accordance with the following table and shall be indicated in the List of Warranted Characteristics.

Ambient Pollution Level (in accordance with TS IEC 60815-2)

Nominal Specific Creepage Distance

Level I (slightly dirty) 16 mm/kV

Level II (medium dirty) 20 mm/kV

Level III (heavily dirty) 25 mm/kV

Level IV (very heavily dirty) 31 mm/kV

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The nominal specific surface creepage length of MV-LV plug-in type insulators of outdoor transformers shall be selected as minimum 25 mm/kV, and it shall be selected as 20 mm/kV for indoor transformers. MV terminals shall have threaded nuts. MV terminals shall have threaded nuts or fishplate and fittings shall be provided. If requested in the List of Warranted Characteristics, the MV connections of transformers shall be made using cable boxes or plug-in type cable heads. Out cone plug-in type insulators shall be used with fully insulated detachable cable heads. Unless otherwise specified in the List of Warranted characteristics, the cable heads shall be provided by the Contractor. Low voltage plug-in type insulator characteristics shall be as follows.

Transformer Rated Power

Plug-in type insulator

(kVA) Number Rated current (A) Rated Voltage (kV)

50-160 4 250 1

250-400 4 630 1

500 4 1000 1

630 4 1250 1

800 4 1250 1

1000 4 2000 1

1250 4 2000 1

1600 4 3150 1

2.3.9. Cable Box Unless otherwise indicated by the Purchaser, the MV and LV connections of the service transformers to be used indoor or outdoor shall be in a metallic or non-metallic protective enclosure (Cable Box) in order to prevent accidental contact with parts under voltage. The protective enclosure (cable box) structure shall be compliant with TS EN 50464-2-3. NOTE: If Plug-in type Outside cone Type insulator is used on MV side of the distribution transformer to be used indoor, Cable Box shall not be requested on MV side. 2.3.10. Protection and Signal Equipment Protection and signal equipment must be operable at 110 V DC and 220 V DC supply voltage. The transformers shall be equipped with the following protection and signal equipment unless otherwise specified in the List of Warranted Characteristics. - Air drier,

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14


- Buchholz relay, two tapped (for 500 kVA and above), - 1st stage alarm - 2nd stage alarm and trip - Oil level indicator (2-contact (alarm + trip)) - Oil temperature indicator (2-contact (alarm + trip)) - Connector box (to be used for 500 kVA and higher power transformers. Connector box enclosure may be made of a metal or insulator material and its protection degree shall be minimum IP44 for indoor type and IP55 for outdoor type. If the enclosure is made of an insulator material, the material to be used shall be flame-resistant. If the connectors necessary for connection to the multi-function protection relay exist, no connector box shall be used. 2.3.11. Isolation Oil The transformers shall be delivered in oil filled condition. This oil shall be brand new and unused, and unless otherwise specified, it shall comply with “TEİAŞ New Isolation Oil Purchase Specifications” given in Annex-3. ASKAREL shall not be used for isolation insulation and cooling. A single type and trademark of oil shall be used for all transformers in the scope of order and the trademark and type of the used oil shall be written on the test reports and transformer nameplate. 2.3.12. Arrangement of Top Cover and Dimensions and Marking the Connection

Ends The assembly of the auxiliary service transformers above 160 kVA (included) on MV busbars of the Transmission Centers shall be determined by the Contractor and the Purchaser together taking into consideration the width, depth and height dimensions of the transformer whenever necessary. If the Purchaser thinks it necessary, the dimensions for the auxiliary service transformers to be used internally (in the cell) shall be given in the List of Warranted Characteristics. In the transformer, the marking of low voltage, mid voltage and marking of neutral connection end that is taken out shall be performed on the tank cover. The marking shall be permanent (e.g.: marking with punch, etc) and shall be easily visible and legible. Painting, tagging and similar markings shall not be acceptable. Marking shall be performed as follows.

MARKING ON COVER Mid Voltage Low voltage

For L1 Line connection conductor 1U 2u

For L2 Line connection conductor 1V 2v

For L3 Line connection conductor 1W 2w

For NEUTRAL connection conductor

2n

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2.3.13. Nameplate There shall be a name plate made of stainless steel or another rust-resistant metal that can be easily seen on the transformers. The name plate shall be fastened using steel screws or rivets, the letters shall be legible, indelible and non-fading. The following information shall be provided on the nameplate in addition to the information indicated in TS EN 60076-1, IEC 60076-1. - Name and order number of the purchaser, - Year and month of production, - Trademark and type of used oil, - No load Losses and load losses, - Tap changer tap no and voltages (in V and/or kV), - Insulation resistance measurement results, - Material code number of the purchaser

2.3.14. Precautions Against Corrosion 2.3.14.1 General The metals parts of the transformers shall be made of corrosion-resistant material and the surfaces shall be processed so as to minimize corrosion. The following precautions shall be taken against corrosion: - The current –carrying parts shall be made of a non-ferrous metal. - All surfaces shall be arranged so as to prevent water holding - The materials to be used in production shall be selected and arranged so as not to cause galvanic corrosion. - The aluminum alloys that will be used as current carrying or structural members shall be corrosion –resistant. - The iron parts shall be hot dip galvanized or painted. - The surfaces that will be galvanized or painted shall be smooth, damage-free, clean and shall be free from foreign materials that shorten the life of the coating.

2.3.14.2 Painting All exposed surfaces of the transformer such as tank, radiator, expansion tank etc., which are produced with metals that can rust, shall be painted. The inner surface of the expansion tank of the transformer shall be painted with a paint that is not impacted by hot oil at minimum 100°C and that prevents rusting, or shall be varnish coated. If the inner surfaces of the transformer tank are painted or varnished, the paint or varnish to be used shall have the above characteristics. The following operations shall be performed for painting the outer surfaces; - All surfaces shall be thoroughly cleaned using the method indicated in the painting standards (sanding + chemical cleaning etc.). - Hot dip galvanizing (if requested in the List of Warranted Characteristics)

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- Catalyzed non-rusting epoxy paints shall be used for the first coat (undercoat) (the undercoat paint shall be selected by the manufacturer in case hot dip galvanizing is requested.) - The base coat paint can be selected by the manufacturer. - The finish coat painting shall be made with the following paints of RAL 7033 or RAL 7039 color code; a) Polyurethane paints, b) Alkyd and silicon paints, c) One of the vinyl paints with different mixtures. - Each coat of paint shall have a thickness of 35 microns (total paint thickness shall be minimum 105 microns.) Painting works shall be completed before the routine tests. total paint thickness shall be measured using a paint check device at five randomly selected points. The average of the measured values shall not be less than 105 microns. If electrostatic powder painting is performed, total paint thickness shall be checked. The paint thickness shall be minimum 105 microns. Painting works shall be completed before the routine tests. The quality of the paint shall be determined by checking the thickness and adherence of the paint coating. The adherence of paint layers with each other shall be checked with band sticking method at five randomly selected points in compliance with TS EN ISO2409 “Paints and varnishes – cross cutting test” standard. The test result must not be worse than Class 1 included in these standards. 2.3.14.3 Galvanizing The galvanizing operation and the tests on galvanized surfaces shall be performed in compliance with TS EN ISO 1461 "Hot Dip Galvanizing on materials made of iron and steel – Characteristics and test methods”. The hot dip galvanizing of all metal parts including the threads of bolts and screwed bars shall be performed after the completion of processing, bending, cutting, drilling, punching, marking and welding operations. After the galvanized nuts are guided and threads are cleaned or re-opened, they shall be lubricated using water resistant and rust-preventing oil. 3. TESTS Unless otherwise indicated in these specifications, the tests shall be performed in compliance with the standards listed in Article 1.2.

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17


3.1. Tests on compenents at factory Routine tests prescribed in the relevant standards shall be performed on all components before they are assembled on the Transformer. In any case, The detailed test reports evidencing that these tests were successful shall be provided by the Contractor to be assessed by the Purchaser. 3.2. Tests on fully assembled transformer High-accuracy devices shall be used, especially; a) The errors in transformer ratio checks shall not exceed ±0.2%. b) The errors in oil and ambient temperature measurements shall not exceed ±0.2%. c) In the measurement of losses and no load current:

- Current and voltage transformer shall be class 0.2 and it shall be known that the relevant errors are within ±0.2%. - Voltmeters and ammeters shall be class 0.2 or more sensitive. - For low power factor, the wattmeters shall be class 0.5 or more accurate.

All measurement systems used in the tests shall be certificated in accordance with the rules of ISO 9001-2008 must have appropriate accuracy and their periodic calibrations must be performed. Measurement systems must be verified and their accuracy must be ensured in accordance with IEC 60076-8. 3.3. Type Tests Short-circuit withstand test

It shall be performed in accordance with the procedures given in IEC 60076-5. Unless there is a difference in the design, auxiliary service transformers shall be grouped as follows in terms of short circuit withstand test. The short circuit type test report to be given shall be deemed to be identical and valid.

Temperature rise test The test shall be performed at the main tap of 33/0.4 kV transformers and with maximum total losses. The tests shall be performed in accordance with IEC 60076-2 using short circuit method.

Measurement of audible sound level

Rated voltage (kV) 6.3-11-15.8 33

Transformer Rated Power (kVA)

50-160 50-160

250-630 250-630

800-2500 800-2500

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18


It shall be performed in accordance with the procedure indicated in IEC 60076-10. Measurement of the harmonics of the no-load current

It shall be performed in accordance with the procedure indicated in IEC 60076-1.

Measurement of no-load loss and current at %90-110 rated voltage

It shall be performed in accordance with the procedure indicated in IEC 60076-1. Measurement of Short circuit impedance voltage load loss at lowest tapping and maximum tapping

It shall be performed in accordance with the procedure indicated in IEEE Std. C57.12.00.

Lightning impulse test

It shall be performed in accordance with the procedure indicated in IEC 60076-3 3.4. Routine Tests The routine tests to be applied on all transformers completed in the scope of these specifications by the Producer are as follows:

Measurement of winding resistance

It shall be performed in accordance with the procedure indicated in IEC 60076-1. MV winding and DC resistances shall be measured in all tap positions. Test currents and winding temperature of DC resistance measurement shall be written in the test report.

Measurement Of Voltage Ratio And Check Of Phase Displacement


Measurement Of Short-Circuit Impedance And Load Loss)


Measurement of zero-sequence impedance(s) on three-phase transformers

It shall be performed in accordance with the procedure indicated in IEC 60076-1 Measurement of no-load loss and current It shall be performed in accordance with the procedure indicated in IEC 60076-1

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Dielectric Withstand Tests

It shall be performed in accordance with IEC 60076-3

- Applied A.C. voltage tests

- Induced A.C. voltage tests

- Partial discharge measurement

Measurement Of Insulation Resistance

The insulation resistance between MV-tank, LV-tank, MV-LV windings shall be measured. Measurement Of insulation capacitance loss factor

The measurement shall be performed between each winding and the tank and the windings of the transformer. The top oil temperature of the transformer, medium

temperature and % humidity must be recorded, % tan𝛅 values must be reduced to 20 °C taking into consideration the top oil temperature values. The % tan𝛅 value reduced to 20C must be lower than 0.5.

Leak testing with pressure for liquid immersed transformers


Measurement Of magnetizing current Function tests

Protection and signal equipment operation shall be checked.

Check of core and frame insulation

It shall be performed in accordance with the procedure indicated in IEC 60076-1 Measurement of paint thickness and its quality check and measurement of galvanize thickness, if any

It shall be performed in compliance with articles “2.3.13.2. Painting” and “2.3.13.3. Galvanizing” of the Type Technical Specifications. 3.5. Oil Tests

It shall be determined with the test reports that the oil to be used in transformers is compliant with the Transformer Oil Specifications in ANNEX-3 and these reports shall be submitted to the Purchaser for approval. In case it is not documented, complete tests of oil shall be performed in compliance with the oil specifications in ANNEX-3.

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20


Unless otherwise specified in the tender documents, it shall be performed on the sample taken from one transformer that is selected from each batch in the scope of delivery. The test results must comply with the oil specifications values in ANNEX-4.

Power Factor (Doble, 25 °C+100°C) Dielectric strength Acidity Internal Surface Stress Density Viscosity Water amount measurement Number of Colors

3.6. Field tests

I. If the transformer assembly is performed by the Purchaser;

The field tests of the transformers and other provided equipment shall not be performed by the Contractor, however, the Contractor shall also be responsible for the failures detected during the field tests.

II. If the transformer assembly is performed by the Contractor;

The following tests shall be performed on each supplied transformer, in front of the Purchaser’s representatives after the completion of assembly of the installations and before their commissioning. Measurement of winding resistance

It shall be measured in accordance with the procedure indicated in IEC 60076-1. The measurement of MV winding DC resistances shall be performed in all tap positions. Test currents and winding temperature, at which DC resistance measurement is performed, shall be written on the test report. Measurement Of Insulation Resistance

The insulation resistance between MV-tank, LV-tank, MV-LV windings shall be measured.

Measurement of voltage ratio and Check of Phase Displacement The voltage ratio shall be measured in all tap positions in compliance with the procedure indicated in IEC 60076-1. Measurement of insulation capacitance Loss factor) The measurement shall be performed between each winding and the tank and between the windings of the transformer. The top oil temperature of the transformer,

the ambient temperature and % humidity must be recorded, and % tan𝛅 values must be reduced to 20 °C taking into consideration the top oil values. The % tan𝛅 value reduced to 20 °C must be lower than 0.5.

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Measurement of magnetizing current

For the connection of the substation to the central control panel, the cells, the cable connections between the cabinets, boxes and terminal blocks shall be checked.

3.7. Sampling The transformers having the same rated power and rated voltage submitted for inspection and test for each delivery are deemed to be one drawing/ item. The samples shall be randomly selected by the PURCHASER representative/ representatives from the drawing/ item included in the scope of delivery and unless otherwise specified, the sample number shall be determined from the following table.

Number of Transformers in the batch Number of Samples to be Taken

1-5 1

6-10 2

11-30 3

31-50 4

51-100 6

101-200 8

4. MATTERS RELATED WITH THE TESTS AND ACCEPTANCE CRITERIA 4.1. Tests 4.1.1. Type Tests The reports belonging to the type tests performed within the last 5 (five) years unless otherwise specified by the Purchaser, in accordance with the latest editions of the relevant standards by a laboratory that is accredited by Turkish Accreditation Institution or by the accreditation institutions included in the International Laboratory Accreditation Cooperation Mutual Recognition Agreement, shall be submitted to the Directorate. The test reports performed within the last 10 (ten) years as of the date of the tender shall be deemed to be valid for short circuit mechanical strength test. The type reports submitted to the Directorate shall belong to the tests performed on transformers of the same type and characteristics as the proposed auxiliary service transformers with expansion tanks that are produced by the same factory. (Short circuit withstand type test shall be assessed in accordance with article 3.3 Type Tests of the Type Technical Specifications.) Even if the requested type test reports are submitted and approved by the Directorate, the type tests that the directorate wants to be repeated shall be repeated without requiring any expenses to be paid by the Directorate, provided that the Directorate has indicated the type tests that it wants to be repeated in the tender file. The type tests that are not submitted to the Directorate or that are submitted but do not comply with the above conditions shall be performed in accordance with the current and latest editions of the relevant standards by an accredited laboratory,

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22


under the supervision of the Directorate’s representatives and their expenses shall be borne by the Contractor. The type tests, which are not submitted to the Directorate, or that are submitted but do not comply with the above conditions shall be performed before the acceptance tests. In relation with the type test reports submitted to the Directorate, a table containing information on the factory, where the type tested transformers are produced, the type and properties of the transformers, to which they belong, the laboratory that performed the type tests, the documents and explanations evidencing that the laboratory that performed the type tests is an accredited laboratory shall be submitted in detail in Turkish. 4.1.2. Routine Tests The routine tests included in article 3.4 of the Type Technical Specifications shall be applied on each submitted transformer by the Manufacturer. 4.1.3. Acceptance Tests The routine tests included in Article 3.4 of Type Technical Specifications shall be applied on samples to be selected in accordance with article 3.7 Sampling on each batch of auxiliary service transformer with expansion tank delivery in accordance ith the current and latest editions of the relevant standards and the test reports shall be submitted to the Directorate in minimum 3 (three) copies either on CD/DVD medium or in hardcopy. The acceptance tests shall be performed at the Producer’s laboratory or a laboratory to be approved by the Directorate and the relevant charges shall be borne by the Contractor. The documents belonging to the routine tests shall be submitted to the Inspection and Acceptance Commission before starting the acceptance tests. otherwise, test and acceptance operations shall not be commenced. 4.2. Acceptance Criteria a) The calibrations of devices to be used in the tests shall be performed by an accredited organization. Calibration certificates and routine test reports shall be submitted to the Directorate or Directorate representative/ representatives before starting the acceptance tests. b) Positive results shall be obtained from all type tests to be performed. If a negative result is obtained in any type test, all the transformers in the order shall be rejected. However, upon Contractor’s request and Directorate’s confirmation, the tests belonging to the new product that is produced by making the necessary changes within a reasonable period, can be acceptable, in which case the decision authority will belong only to the Directorate and all expenses will be borne by the Contractor. If the tests that are performed for the second time have negative results again, all of the order shall be rejected.

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c) Positive results shall be obtained in all acceptance tests. if a negative result is obtained in any of the acceptance tests, these tests shall be performed on all transformers constituting the batch. In accordance with this, the transformers, which gave negative results in the tests shall be either replaced with new ones or repaired with all expenses being borne by the Contractor. 4.3. Acceptance Procedure Inspections and tests can be performed at the manufacturer’s facilities, material delivery location and/or at the place of final delivery of the materials. If the inspections and tests are performed at the facilities of the producer, any kind of assistance and facilitation shall be provided for the inspectors including permission to review the drawings and production information. All inspection and test expenses shall be borne by the Contractor. After signing the Contract, the Contractor shall send the detailed test program to the Directorate. The Contractor shall make such notification to the Directorate minimum 30 (thirty) days before for the tests to be performed abroad and minimum 15 (fifteen) days before for the tests to be performed in the country. As the result of a successful test and inspection, the test reports shall be mutually signed and Shipment Order shall be given by the Directorate’s representatives. The Contractor shall submit 3 (three) copies of each of mutually signed test reports, to the Directorate’s representatives. However, the Directorate may notify to the Directorate in time that it will not participate in the tests. In case the Directorate does not notify in writing that it will participate in the tests 48 hours beforehand, the Contractor shall perform the tests and notify the results to the Directorate. The Contractor shall send 3 (three) copies of test reports to the Directorate for examination and approval purposes. If the test reports are confirmed, a Shipment Order shall be placed by the Directorate and 1 (one) approved copy of the test report shall be sent back to the Contractor.

TEİAŞ

160 KVA

LIST OF WARRANTED CHARACTERISTICS


24

ANNEX –I/A AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK (MV/LV) (33/0.4 kV, 160 KVA) LIST OF WARRANTED CHARACTERISTICS

DEFINITION UNIT REQUESTED WARRANTE

D

1. Manufacturer name -

2. Manufacturer’s type mark -

3. Applied standards -

4. Type (Indoor / Outdoor) -

5. Rated power (kVA) 160

6. Rated frequency (Hz) 50

7. Connection group -

8. Cooling type - ONAN

9. Rated voltages

MV winding (kV)

LV winding (kV)

10. Voltage regulation area and tap number

-

11. Voltage regulation - MV and idle

12. No load transformer ratio -

13. Operational conditions

Height from sea level (m)

Ambient temperature

- Maximum (°C)

- Minimum (°C)

- 24 –hour average (°C)

- Annual average (°C)

Ambient air pollution -

Icing -

Wind pressure (kg/m2)


-

TEİAŞ

DEFINITION UNIT REQUESTED WARRANTED

160 KVA



25

Maximum relative humidity (%)

Exposure to earthquake

- horizontal acceleration (g)

- vertical acceleration (g)

Maximum solar radiation (W/m²)

Lightning strike probability -

14. MV Plug-in type insulator

Open type (Ceramic) -

Outer cone plug-in type -

15. Nominal creepage distance for Open type MV plug-in type insulators

(kV/mm)

16. Cable box

At LV (YES/NO) - YES

At MV (YES/NO) - YES

17. Temperature Rise Limits

LV Winding (K)

MV Winding (K)

Top oil (K)

18. Insulation Levels

Short time power frequency withstand voltage for MV windings

(kV-effective)

70

Short time power frequency withstand voltage for LV windings

(kV-effective)

3

Lightning strike impulse withstand voltage for MV windings (1.2-50 micro seconds)

(kV-peak) 170

19. Partial discharge level (max.) (pC)

20. Short circuit impedance (75° C)

At the main tap (%) 4.5

At the highest tap (%)

At the lowest tap (%)

TEİAŞ


160 KVA



26

21. No load loss (at main tap voltage)

(Watt) 390

22. No load current (at main tap voltage)

(A)

23. Load loss (reduced to 75°C )

At main tap (Watt) 2150

At the highest tap (Watt)

At the lowest tap (Watt)

24. Sound power level (dB) 57

25. Short circuit thermal withstand period

(s) 2

26. LV Winding

Conductor material (aluminum/copper)

-

Conductor section (mm2)

Conductor type (folio/tape) -

Winding insulation -

Winding form

Concentric circular Concentric non-circular

-

27. MV Winding


-




Winding form


-

28. Maximum variation in short circuit reactance after short circuit withstand test

% 2

29. Conductor weight of windings

LV winding (kg/phase)

MV winding (kg/phase)

30. Core characteristics

Core type (mantel/core) -

TEİAŞ


160 KVA



27

Quality of siliceous sheet that is used

-

Magnetizing flux density (Tesla) <1.75

Magnetic circuit (core) weight (kg)

31. External Connection Type

LV terminals -

MV terminals -

32. Container weight (kg)

33. İsolation oil trademark and type -

34. Oil weight (kg)

35. Weight of complete transformer (kg)

36. Seal used between the tank and the cover

Seal material -

Seal type (cork, round etc.) -

37. Wheels

Dimensions (diameter and width)

(mm)

Distance between wheels (mm)

38. Distance between energized sections

Distance between LV phase-phase bushings

(mm)

(*)In accordance with EKAT regulation

Distance between MV phase-phase bushings

(mm)


39. Dimensions

Width (mm)

Height (mm)

Length (mm)

Top cover height (mm)

(*)EKAT: Electrical Heavy Current Installations Regulation

TEİAŞ

250 KVA LIST OF WARRANTED

CHARACTERISTICS TEİAŞ-MYD2004-005.1

28

ANNEX –I/B AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK (MV/LV)(33/0.4 kV, 250 KVA)LIST OF WARRANTED CHARACTERISTICS


D









9. Rated voltages

MV winding (kV)

LV winding (kV)

10. Voltage setting area and tap number

-

11. Voltage setting - OG ve Boşta




Ambient temperature

- Maximum (°C)

- Minimum (°C)



Ambient air pollution

Icing -



-

TEİAŞ




29











(kV/mm)

16. Cable box

At LV (YES/NO) - EVET

At MV (YES/NO) - EVET


LV Winding (K)

MV Winding (K)

Top oil (K)



(kV-effective)

70


(kV-effective)

3

Lightning impulse withstand voltage for MV windings (1.2-50 micro seconds)

(kV-peak) 170







(Watt) 550

TEİAŞ




30


(A)







(s) 2

26. LV Winding


-



Winding insulation

Winding form


-

27. MV Winding


-



Winding insulation

Winding form


-


% 2







-


TEİAŞ




31



LV terminals -

MV terminals -



34. Oil weight (kg)



Seal material -


37. Wheels


(mm)




(mm)



(mm)


39. Dimensions

Width (mm)

Height (mm)

Length (mm)


(*)EKAT: Electrical Heavy Current Installations Regulation

TEİAŞ


32 500 KVA


ANNEX–I/C AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK (MV/LV) (33/0.4 kV, 500 KVA) LIST OF WARRANTED CHARACTERISTICS


D









9. Rated voltages

MV winding (kV)

LV winding (kV)

10. Voltage setting area and tap number

-

11. Voltage setting - MV and Idle




Ambient temperature

- Maximum (°C)

- Minimum (°C)



Ambient air pollution -

Icing -



-

TEİAŞ


D


33 500 KVA












(kV/mm)

16. Cable box

At LV (YES/NO) - YES

At MV (YES/NO) - YES


LV Winding (K)

MV Winding (K)

Top oil (K)



(kV-effective)

70


(kV-effective)

3

Lightning impulse withstand voltage for MV windings (1.2-50 micro seconds)

(kV-peak) 170






TEİAŞ


D


34 500 KVA



(Watt) 940


(A)







(s) 2

26. LV Winding


-




Winding form


-

27. MV Winding


-




Winding form


-


% 2






TEİAŞ


D


35 500 KVA



-




LV terminals -

MV terminals -



34. Oil weight (kg)



Seal material -


37. Wheels


(mm)




(mm)

(*)in accordance with EKAT regulation


(mm)

(*)in accordance with EKAT regulation

39. Dimensions

Width (mm)

Height (mm)

Length (mm)


(*)EKAT: Electrical Heavy current installations regulation

TEİAŞ

LIST OF DEVIATIONS TEİAŞ-MYD2004-005.1 36

ANNEX- II AUXILIARY SERVICE POWER TRANSFORMER WITH EXPANSION TANK

(MV/LV)LIST OF DEVIATIONS Order No. : .................. Dwg. No. : ..................

Purchaser’s Mtr. Code No : .................. A- DEVIATIONS FROM TECHNICAL SPECIFICATIONS (The articles containing deviations and what those deviations are shall be clearly indicated by the bidder.)

……………………………………………………………….

……………………………………………………………….

……………………………………………………………….

……………………………………………………………….

……………………………………………………………….

……………………………………………………………….

………………………………………………………………… B- DEVIATIONS IN THE LIST OF WARRANTED CHARACTERISTICS (The articles containing deviations and what those deviations are shall be clearly indicated by the bidder.)

……………………………………………………………….

……………………………………………………………….

……………………………………………………………….

..…………………………………………………………… “