distribution transformers - ormazabal for distribution dielectric liquid immersed transformers...

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Reliable innovation. Personal solutions.

MV/LV Transformers for Distribution Network Solutions

Distribution TransformersUp to 36 kV and up to 5 MVA IEC Standards

Dielectric liquid immersed transformers Transformers for Distribution Network Solutions up to 36 kV

Contens

IntroductIon _________________________ 1Preface 1

Your Electrical Network 2

Your Business and DNS Applications 2

Our Product Map (SSS & DNS) 3

MaIn features _______________________ 4Safety 4

Reliability 6

Efficiency 6

Sustainability 7

Continuous innovation 7

technIcal detaIls ______________________ 8Family 8

Applied Standards 8

Constructive structure 8

desIgn characterIstIcs __________________ 9Low voltage connection 9

Medium voltage connection 9

Standard equipment 10

Optional equipment 11

Other dielectric liquids 11

Type of Transformers ____________________________________ 12

Characteristics 24 kV: D0 CK (AB’) 12

Characteristics 24 kV: C0 CK (AC’) 14

Characteristics 24 kV: C0 BK (CC’) 16

Characteristics 36 kV: B036 BK36 18

The quality of the products designed, manufactured and installed by Ormazabal is backed by the implementation and certification of a quality management system, based on international standard ISO 9001:2008.Our commitment to the environment is reaffirmed with the implementation and certification of an environmental management system as laid down in international standard ISO 14001.In view of the constant evolution in standards and design, the characteristics of the elements contained in this catalogue are subject to change without prior notification.These characteristics, as well as the availability of components, are subject to confirmation by Ormazabal.

Dielectric liquid immersed transformersTransformers for Distribution Network Solutions up to 36 kV

1

PrefaceThe incorporation into Ormazabal in 2001 of the distribution transformer manufacturer Cotradis constituted a strategic milestone for us.

The exchange of know-how between our technical teams has significantly reinforced the value added for our customers.

Growing energy demands, higher quality requirements in energy supply and the priority to reduce the consumption of natural resources require the use of equipment which responds with high levels of reliability, safety and energy efficiency.

Focusing on the needs of our customers and mastering new technologies allows us to offer products which comply with these requirements.

Our specialisation in Medium Voltage is backed by the certification of our transformers in major European electrical companies.

We manufacture a wide range of dielectric liquid immersed distribution transformers, compliant with all of the requirements in current international regulations and with a range of powers from 25 kVA to 5000 kVA and insulation levels up to 36 kV.

Furthermore, close collaboration with our customers enables us to develop transformers conforming to their own particular standards and specifications.

Ormazabal is the leading provider of personalized solutions to electrical utilities, to energy end users as well as renewable energy systems applications based on our own technology.

We encourage the development of the electrical sector concerning the challenges of the future energy needs. We cooperate with the world's leading local, regional and global companies in the electrical sector with a strong commitment to innovation for personal safety, network reliability, energy efficiency, and sustainability.

Our highly qualified and focused team of professionals thrilled by innovation have developed our own products and solutions during our more than a century long consolidated history, always by establishing close relationship with our clients towards achieving mutual long term benefits.

Velatia is an international industrial and technological group which operates in the areas of electrical networks, electronics and communication networks as well as in the consulting, security and aviation sectors, where security, efficiency and reliability are valued.

Grupo Ormazabal is now called Velatia. We have combined our forces to transform ourselves into a stronger group. Made up of companies with more than a hundred years of experience and committed to innovation to meet the present and future needs of our customers, wherever they may be.

The solutions of the companies in Velatia seek to make the world a more connected, more sustainable, smarter, better connected, safer, more humane place.

Introduction

Kalkbukt PV Plant (Republic of South Africa)

Public Distribution EDF utility (France)

Athletic Bilbao Stadium (Bilbao, Spain)


2

Your Electrical Network"Your dedicated partner for reliable and intelligent electrical network"

Your Business and DNS ApplicationsClose relationship with our customers and the profound knowledge of the electrical business are the keys to success that enable us to offer Distribution Network Solutions (DNS) based on high added value products and services adapted to the needs of the electrical utilities, electrical energy end users and renewable energies.

Smart GridTransmission & Distribution

Generation

Infrastructures Industrial Tertiary

Wind Solar

Dispatchable RES

Distributors OEM EPC


3

Our Product Map (SSS & DNS)We believe that excellence does not lie solely in offering effective products and services, but also in the ability to respond to individual requirements and demands.

We provide our clients with personalised projects for efficient energy management via Primary and Secondary Distribution equipment and solutions.

Our Business Lines

SSS: Substation Solution for primary distribution

DNS: Distribution Network Solutions for secondary distribution

Our products for your segment

CPG.1 CPG.0 GAE 1250kMAX AMC

CiBOR ORMA- CONTAINER

Prefabricated substationsA-CiBOR NVL-CiBOR

CGM.3 GAE GA CGMCOSMOS [IEC - ANSI/IEEE]

CGMCOSMOS [HN]

EA

Protection, automation and controlDistribution transformers Low voltage

boardConventional oil ORGANIC TPC

Concrete prefabricated transformer substations (TS) Metallic prefabricated TS CEADS Switching

nodesUnderground Walk-in Compact

Concrete enclosure for transformer substations (TS) Metallic enclosure for TS

Photovoltaic substation

Mobile substationUnderground Walk-in Modular

Current® family ekorSYS family

Advanced metering, sensing & analytics and communications

Protection, automation and control


4

SafetyOur transformers are subjected to the tests described in the IEC 60076 series of standards.

We have our own laboratories for this purpose, equipped with modern, precise measurement devices and systems that are certified and calibrated according to the directives of the ISO 9001 standard, to ensure that our products comply with the most demanding quality standards.

Routine testAll of the transformers manufactured are subjected to the following routine tests, in accordance with IEC 60076-1:•Winding resistance measurement.•Measurement of the voltage ratio

and verification of the vector group.

•Measurement of the short-circuit impedance and load losses.

•Measurement of no -load losses and current.

•Dielectric routine tests:•Separate source AC withstand

voltage test (also known as Applied over-voltage test or Power frequency test)

• Induced AC voltage test (ACSD) (also known as Short duration induced AC withstand voltage test)

Separate source AC withstand voltage test(Applied over-voltage test or Power frequency test)

MV LVHighest voltage for the equipment, Um, (Insulation Level).

[kV] 12 17.5 24 36 1.1 3.6

Rated withstand Voltage of the test (1 minute).

[kV] 28 38 50 70 3 10

Type testWith our customer’s agreement, the following tests are performed in accordance with current international regulations:•Temperature-rise test.•Dielectric type tests:• Lightning impulse (LI) test.

Lightning impulse (LI) test

MV LVHighest voltage for the equipment, Um, (Insulation Level).

[kV] 12 17.5 24 36 1.1 3.6

Rated withstand Voltage for Lightning impulse test (1.2 / 50μs).

[kV] 75 95 125 170 20 20

Main features


5

Special testSpecial tests specifically requested by the customer:•Special dielectric tests.•Partial discharge measurement

test.•Winding capacities measurement

– earth and between windings.•Zero-sequence (homopolar)

impedance measurement (in three-phase transformers).

•Ability to withstand Short-circuit test (IEC 60076-5), performed in accredited external and internal laboratories (HPL).

•Sound level measurement(IEC 60076-10).

•Measurement of no-load current harmonics.

•Measurement of insulation resistance and/or measurement of the dissipation factor (tan delta) of the insulation capacitances.

Additional testDielectric Oil Tests

The transformer’s operative life is largely related to the quality of the dielectric liquid. We assure the highest quality standards by means of strict qualification and product auditing processes as well as by applying the most advanced technologies in the treatment process.•Density at 20ºC•Viscosity at 40ºC•Water content•Breakdown voltage•Dielectric dissipation factor• Interfacial tension•Acidity•Flash point

Tank Tests•EN 50464-4 Endurance test

Paint Tests•Film Thickness measurement•Adherence test•Hardness test•Bend test• Impact test•Cupping test•Salt spray test


6

ReliabilityThe quality and reliability of our products is demonstrated through the testing and certification of our transformers in independent, internationally-renowned laboratories.

Furthermore, the technological development and passion for innovation, which has been fundamentally apparent throughout the history of our company, is reinforced by our High Power Laboratory (HPL) with a capacity up to 2500 MVA.

These are our own facilities which enable ongoing tests and which combined with our highly-qualified staff, further certify our technological independence.

Together with external organisations and official bodies, we also participate in market quality control campaigns to assure the verification of our products.

Efficiency Dielectric Liquid completely immersed Hermetically-Sealed Transformer•Hermetically-sealed tanks:• No expansion tank is needed.

• Less dielectric liquid used than in other types of transformer.

•No contact between the dielectric liquid and external agents (air, humidity, pollution, etc.)

• Prevents deterioration of the dielectric’s characteristics.

• Low-level maintenance.

•Minimal risk of leakages:• Tank robustness (high quality materials).

• Welding processes carried out by qualified staff.

• Leak tests performed in all transformers.

Minimal Environmental Impact•Respect for the environment:• Use of highly-recyclable materials.

• Rationalisation in the use of raw materials.

• Optimised transformer dimensions

•Optimum consumption of raw materials:

• Materials selection.

• Maximisation of their characteristics.

•Low electrical energy consumption:

• Advanced technology in design, manufacturing and testing.

• Minimal loss transformers.

• Safe, reliable products.

• ISO 14001 certification.

Low Noise Level•An optimum design and assembly

of the ferromagnetic core enables us to drastically reduce the level of noise generated by the transformer.

•There are two components that identify the level of noise produced by a transformer: LwA = LpA + KS

Where:

• LwA: Acoustic Power (cause)

• LpA: Acoustic Pressure (effect)

• KS factor (>0) which depends on the size of the transformer.

To define a transformer, the use of Acoustic Power LwA is recommended since it is a value which is independent from the environment and is therefore the best magnitude for assessing the acoustic emissivity of a transformer.


7

PCB Free•Our transformers are only

manufactured using new components and without any PCBs, in strict compliance with current regulations.

Electromagnetic CompatibilityOur transformers are passive elements in terms of electromagnetic compatibility. In other words, they work satisfactorily without adding electromagnetic noise that is intolerable for equipment in their surroundings and they withstand such interference caused by other devices.

The currents that circulate through the conductors connected to the transformers, especially low-voltage ones, can cause significant electromagnetic fields. The installation designer must make sure that these cables are laid such that the fields are minimised or, if necessary, measures must be adopted to limit their effects.

Sustainability Sustainability, understood as the best compromise between satisfying social demands, caring for the environment and financial aspects.

Social Demands•Safety of people and goods.•Continuity of service.

Financial Aspects•Optimum use of raw materials.•Longer equipment life, endurance

and robustness.•Equipment adaptable to network

evolution.•Equipment durability.

Caring for the Environment•Reduction in the volume of

dielectric liquid.•Minimal dimensions.•Minimal losses in the transformer.•Low risk of oil leakage.•Non-aggressive for the

surrounding environment.•Recyclability.

Continuous innovationOur commitment to innovation places us at the technological forefront of Europe.

Therefore our products meet the most demanding worldwide requirements and are certified by internationally renowned laboratories.

Recently we have extended our product range to 5 MVA and also we have developed several new transformers with lower losses.

Our quality, environmental and health& safety prevention policies establish our commitment to fostering and being part of an environmentally-responsible society.

Within this framework, our quality management system is internationally recognised through ISO 9001 certification.

Furthermore, our strong commitment to the environment is reflected in the implementation of an environmental management system, certified according to the ISO 14001 standard, which monitors the impact of activities on the environment.

This policy also aims to promote and establish a culture of excellence and respect for personal health and safety, in accordance with standard OHSAS 18001. Its scope ranges from our team of professionals and partners to the end user.


8

Technical detailsFamilyFrom25to5000kVA•Insulation Level 24 and 36 kV

Dielectric Liquid Immersed Transformers

DescriptionThese transformers comply with the following characteristics:• Three-phase transformers,

50 Hz for installation indoors or outdoors

•Hermetically-sealed•Completely Immersed in mineral

oil in accordance with standard IEC 60296.

•ONAN cooling.•Colour: RAL 7033 (other colours

under request).

The data and values shown correspond to the Normal Service Conditions referred to in standard IEC 60076-1.

For other configurations, please contact our Technical-Commercial Department.

Applied StandardsThe transformers comply with the following standards:•EN 50464•IEC 60076

Constructive structureActive partThe active part of the transformer is the energy transformation system, composed of the ferromagnetic core, the windings and the medium and low voltage connections.

Tank and dielectricThe transformer’s tank and the dielectric liquid provide the necessary insulation and cooling.

2

1

1. Active part2. Tank and dielectric

Windings Advantages• Concentric windings.• Insulation between layers: Cellulose with epoxy

resin which compacts the coils, once cured.• Coils are manufactured using the latest

techniques and machinery.

• Optimised to withstand short circuit forces.

• Expertise in coil cooling.• Careful manufacturing of coils and cooling

channels.

• Improved heat dissipation in the windings.

• Use of high-quality cellulosic materials.• Optimum handling and storage to preserve

insulation properties.• Guaranteed insulation.

Connections and Tap Changer Advantages

• MV and LV terminals. • Transformer connection to the outside.

• Off-circuit Tap changer. • Secondary voltage can be adjusted precisely.

Tank and Dielectric Liquid Advantages

• Elastic Corrugated tank with cooling fins.

• Increased heat dissipation surface.• Absorption of variations in the volume of the dielectric

liquid caused by changes in its temperature.• Mechanical and electrical protection.

• Completely filled with dielectric liquid and hermetically sealed tank.

• No aging of the dielectric liquid as there is no contact with the air.

• Minimal maintenance requirements.• Small size.• No expansion tank or air dehydrating needed• Lighter in weight.• Electromagnetic field shielding.

• Immersed in dielectric liquid.• Lower noise level.• Better behaviour in the event of overloads and

harmonics.

• Surface treatment and paint. • Protection against corrosion, atmospheric agents, insolation and impacts.


9

Design characteristicsLV single phase Busbar Bushings (optional)

LV connection Flags

Metric M12 Metric: from M20 to M55

Low voltage connectionLV porcelain bushings for 420 V - B2*

Rated Power [kVA] 25 40 50 63 100 160 250 400 500 630 800 1000 1250 1600 2000 2500

Rated current [A] 250 250 250 250 250 250 630 630 1000 1000 1600 1600 2000 3150 3150 4000

Dimension - Metric d1 M12 M12 M12 M12 M12 M12 M20 M20 M30 M30 M42 M42 M42 M48 M48 M55

Material Brass Brass Brass Brass Brass Brass Brass Brass Brass Brass Brass Brass Copper Copper Copper Copper

Connections parts – LV FlagsMetric M12 M12 M12 M12 M12 M12 M20 M20 M30 M30 M42 M42 M42 M48 M48 M55

e [mm] - - - - - - 32 32 32 32 40 40 40 40 40 70

f0 [mm] 40 40 40 40 40 40 60 60 60 60 100 100 100 120 120 150

Ø [mm] 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 18

LV single pole busbar bushings for indoor installation (optional)Rated Power [kVA] 25 40 50 63 100 160 250 400 500 630 800 1000 1250 1600 2000 2500

Rated current [A] - - - - - - 630 630 1600 1600 1600 1600 - - - -

Material - - - - - - Al Al Copper Copper Copper Copper - - - -

Please contact Ormazabal for ohter secondary voltages and technical values above 2500 kVA.

Medium voltage connectionConnectors for mv plug-in bushings (not supplied with the transformer)

Insulation [kV] 24 36

Type A elbow connector (250 A)Ref. EUROMOLD K-158LR

Type B elbow connector (400 A)Ref. EUROMOLD M-400LR

Type A straight connector (250 A)Ref. EUROMOLD K-152SR -


10

Uninhibited mineral insulating oil IEC 60296

1. Off-circuit regulation tap changer (can only be operated without voltage) IEC 60214

Off circuit voltage tap changer for dual primary voltage transformers (can only be operated without voltage)

IEC 60214

2. MV porcelain bushings EN 50180

3. LV porcelain bushings EN 50386

4. LV connection Flags ≥630 kVA

5. 2 Earthing terminals in the tank EN 50216-4

6. Draining and sampling device EN 50216-4

7. Filling device EN 50464-1

8. Rating plate EN 50464-1

9. 2 Lifting eyes EN 50464-1

10. 4 Latching eyes EN 50464-1

11. 4 Pulling eyes EN 50464-1

12. Thermometer pocket EN-50216-4

13. Wheels ≥250 kVA EN-50216-4

Standard equipment

1 4

29

73

2

8

5

1210

11

13

6


11

Other dielectric liquids•ORGANIC transformers: Natural,

biodegradable ester for application in electrical transformers. Class K with fire point greater than 300 ºC.

•Dielectric liquid silicone according to the IEC 60836 standard, Class K with fire point greater than 300 ºC.

•Synthetic biodegradable ester for application in electrical transformers according to the IEC 61099 standard. Class K, with fire point greater than 300 ºC.

Optional equipment

1. MV plug-in bushings EN 50180

2. LV single pole busbar bushings EN 50387

3. Thermometer: measures the temperature of the top layer of the insulation liquid. Available with 2 contacts (alarm and trigger) and upper limit marker.

4. Protection relay Functions: Internal tank pressure control Dielectric liquid temperature control Oil level control and gas detection

EN 50216-3

5. Dielectric liquid collection device

6. Terminal cover box

7. Pole mounting brackets and support for surge arresters (application for pole mounted transformers up to 160 kVA).

21

6

3

5

4

7

7


12

Type of transformersCharacteristics 24 kV: D0 CK (AB’) From250upto5000kVA•InsulationLevel24kVDielectric Liquid Immersed Transformers

Electrical characteristics 24 kV: D0 CK (AB’)Rated Power [kVA] 250 400 500 630 800 1000 1250 1600 2000 2500(*)

Rated Voltage (Ur)Primary [kV] 20No-load Secondary [V] 400 / 410 / 415 / 420 (to be defined)

Vector Group Dyn11/ Dyn5

No-Load Losses - Po [W] List D0 530 750 880 1030 1150 1400 1750 2200 2700 3200

Load Losses - Pk [W] List Ck 3250 4600 5500 6500 8400 10500 13500 17000 21000 26500

Short-Circuit Impedance (%) at 75ºC 4 4 4 4 6 6 6 6 6 6

Sound Power Level LwA [dB] List D0 60 63 64 65 66 68 69 71 73 76

Voltage drop at full load (%)cosƒ=1 1.37 1.22 1.16 1.11 1.19 1.22 1.25 1.24 1.22 1.23cosƒ=0.8 3.33 3.25 3.21 3.17 4.44 4.47 4.49 4.48 4.47 4.47

Efficiency (%)load 100%

cosƒ=1 98.51 98.68 98.75 98.82 98.86 98.82 98.79 98.81 98.83 98.83cosƒ=0.8 98.15 98.36 98.44 98.53 98.58 98.53 98.50 98.52 98.54 98.54

load 75%cosƒ=1 98.76 98.90 98.96 99.02 99.06 99.04 99.01 99.03 99.04 99.04cosƒ=0.8 98.45 98.63 98.70 98.78 98.83 98.80 98.77 98.79 98.81 98.81

Dimensions [mm]Rated Power [kVA] 250 400 500 630 800 1000 1250 1600 2000 2500A (Length) 1376 1537 1622 1622 1932 1997 2007 1922 1965 2093B (Width) 930 941 962 962 1161 1200 1200 1224 1277 1487C (Height to cover) 915 1004 1026 1092 1112 1158 1230 1517 1715 1737D1 (Height to MV with porcelain bushings) 1300 1389 1411 1477 1497 1543 1615 1902 2100 2122D3 (Height to MV Plug-In bushings) 1004 1093 1115 1181 1201 1247 1319 1606 1804 1826D2 (Height to LV with Flags) 1149 1238 1287 1353 1445 1491 1563 1886 2084 2167F (Separation between MV bushings) 275 275 275 275 275 275 275 275 275 275

H (separation between LV bushings) 150 150 150 150 150 150 150 200 200 200

J (Distance between wheel axis) 670 670 670 670 670 670 820 820 820 1070K (wheel width) 40 40 40 40 40 40 70 70 70 70Ø (wheel diameter) 125 125 125 125 125 125 200 200 200 200L (Wheel) 110 110 110 110 110 110 165 165 165 165

Oil Volume [Litres] 260 330 390 410 510 530 540 1000 1200 1400Total weight [Kg] 1010 1330 1600 1750 2250 2430 2750 3850 4750 5350

Lifting Eyes LV Bushings

MV Bushings

Wheel Frames (skids)

Thermometer Pocket

Draining and Sampling Device

Earth connectionM12

MV Regulation Tap Changer

Filling Device

Lifting Eyes

LV Bushings

MV Bushings


Thermometer Pocket


Filling Device


Earth connectionM12

F F F

J

H H

A

H

B

F

K

D2

M

L

D2

M LC

J

D1D3C

KJ J

H H

A

B

H

MV Plug-In Bushings MV Porcelain Bushings

(*) Please contact Ormazabal for technical values above 2500 kVA.


13

Characteristics 24 kV: D0 CK (AB’) From25upto160kVA•InsulationLevel24kVDielectric Liquid Immersed Transformers

LV Bushings

MV Bushings Surge arresters support (Op) Lifting Eyes

Latching eyes

Filling Device



Thermometer Pocket(optional)


Earth connectionM12

MV Porcelain BushingsF

JK

A

H H H

B

D2 D

1C

LL80

J

140

F

Electrical characteristics 24 kV: D0 CK (AB’)Rated Power [kVA] 25 40 50 63 100 160


Vector Group Yzn11/Dyn11 Dyn/Yzn

No-Load Losses - Po [W] List D0 95 125 145 175 260 375

Load Losses - Pk [W] List Ck 700 940 1100 1270 1750 2350

Short-Circuit Impedance (%) at 75ºC 4 4 4 4 4 4

Sound Power Level LwA [dB] List D0 47 49 50 51 54 57

Voltage drop at full load (%)cosƒ=1 2.84 2.40 2.26 2.08 1.81 1.54cosƒ=0.8 3.96 3.83 3.77 3.70 3.57 3.43


cosƒ=1 96.92 97.41 97.57 97.76 98.03 98.33cosƒ=0.8 96.18 96.78 96.98 97.21 97.55 97.92

load 75%cosƒ=1 97.46 97.87 98.00 98.15 98.37 98.61cosƒ=0.8 96.84 97.35 97.52 97.70 97.97 98.26

Dimensions [mm]Rated Power [kVA] 25 40 50 63 100 160

A (Length) 888 888 888 926 1006 1205

B (Width) 704 704 704 735 796 848

C (Height to cover) 768 810 810 844 889 847

D1 (Height to MV with porcelain bushings) 1153 1195 1195 1229 1274 1232

D3 (Height to MV Plug-In bushings) 857 899 899 933 978 936

D2 (Height to LV with Flags) 918 960 960 994 1039 997

F (Separation between MV bushings) 275 275 275 275 275 275

H (separation between LV bushings) 80 80 80 80 80 80

J (Distance between wheel axis) 520 520 520 520 520 520

K (wheel width) 40 40 40 40 40 40

Ø (wheel diameter) 125 125 125 125 125 125

L (Wheel) 110 110 110 110 110 110

Distance between pole mounting brackets 530 530 530 530 530 530

Oil Volume [Litres] 100 105 105 120 155 200

Total weight [Kg] 360 400 435 515 610 770


14

Characteristics 24 kV: C0 CK (AC’) From250upto5000kVA•InsulationLevel24kVDielectric Liquid Immersed Transformers

Lifting Eyes LV Bushings

MV Bushings


Thermometer Pocket


Earth connectionM12


Filling Device

Lifting Eyes

LV Bushings

MV Bushings


Thermometer Pocket


Filling Device


Earth connectionM12

F F F

J

H H

A

H

B

F

K

D2

M L

D2

M LC

J

D1D3C

KJ J

H H

A

B

H

MV Plug-In Bushings MV Porcelain Bushings

Electrical characteristics 24 kV: C0 CK (AC’)Rated Power [kVA] 250 400 500 630 800 1000 1250 1600 2000 2500(*)



No-Load Losses - Po [W] List C0 425 610 720 860 930 1100 1350 1700 2100 2500

Load Losses - Pk [W] List Ck 3250 4600 5500 6500 8400 10500 13500 17000 21000 26500


Sound Power Level LwA [dB] List C0 55 58 59 60 61 63 64 66 68 71



cosƒ=1 98.55 98.71 98.77 98.85 98.85 98.85 98.83 98.84 98.83 98.85cosƒ=0.8 98.20 98.40 98.47 98.56 98.56 98.57 98.54 98.56 98.55 98.57

load 75%cosƒ=1 98.81 98.95 98.99 99.05 99.07 99.07 99.06 99.07 99.06 99.08cosƒ=0.8 98.52 98.69 98.74 98.82 98.84 98.85 98.82 98.84 98.83 98.85







15

Characteristics 24 kV: C0 CK (AC’) From25upto160kVA•InsulationLevel24kVDielectric Liquid Immersed Transformers

LV Bushings


Latching eyes

Filling Device





Earth connectionM12


JK

A

H H H

B

D2 D

1C

LL80

J

140

F

Electrical characteristics 24 kV: C0 CK (AC’)Rated Power [kVA] 25 40 50 63 100 160


Vector Group Dyn11/ Dyn5 Dyn/Yzn

No-Load Losses - Po [W] List C0 75 105 125 145 210 300

Load Losses - Pk [W] List Ck 700 940 1100 1270 1750 2350


Sound Power Level LwA [dB] List C0 45 47 47 48 49 52



cosƒ=1 96.99 97.45 97.61 97.80 98.08 98.37cosƒ=0.8 96.27 96.84 97.03 97.27 97.61 97.97

load 75%cosƒ=1 97.56 97.93 98.06 98.21 98.43 98.67cosƒ=0.8 96.97 97.43 97.58 97.78 98.05 98.34


A (Length) 888 888 888 926 1.006 1.205

B (Width) 704 704 704 735 796 848

C (Height to cover) 780 869 828 859 911 847


D3 (Height to MV Plug-In bushings) 869 958 917 948 1.000 936

D2 (Height to LV with Flags) 930 1.019 978 1.009 1.061 997




K (wheel width) 40 40 40 40 40 40

Ø (wheel diameter) 125 125 125 125 125 125

L (Wheel) 110 110 110 110 110 110



Total weight [Kg] 370 440 445 520 670 790


16

Characteristics 24 kV: C0 BK (CC’)From250upto5000kVA•InsulationLevel24kVDielectric Liquid Immersed Transformers

Lifting Eyes LV Plug-In Bushings MV Porcelain

Bushings


Thermometer Pocket


Earth connectionM12


Filling Device

Lifting Eyes

LV Plug-In Bushings

MV Porcelain Bushings


Thermometer Pocket


Filling Device


Earth connectionM12

F F F

J

H H

A

H

B

F

K M L

D2

M L

D2

C

J

D1D3C

KJ J

H H

A

B

H

LV Plug-In Bushings MV Porcelain Bushings

Electrical characteristics 24 kV: C0 BK (CC’)Rated Power [kVA] 250 400 500 630 800 1000 1250 1600 2000 2500(*)



No-Load Losses - Po [W] List D0 425 610 720 860 930 1100 1350 1700 2100 2500

Load Losses - Pk [W] List Bk 2750 3850 4600 5400 7000 9000 11000 14000 18000 22000


Sound Power Level LwA [dB] List C0 55 58 59 60 61 63 64 66 68 71



cosƒ=1 98.75 98.90 98.95 99.02 99.02 99.00 98.98 99.03 99.03 99.03cosƒ=0.8 98.44 98.63 98.69 98.77 98.78 98.75 98.73 98.79 98.79 98.79

load 75%cosƒ=1 98.96 99.08 99.13 99.18 99.20 99.19 99.17 99.21 99.21 99.21cosƒ=0.8 98.70 98.86 98.91 98.98 99.00 98.98 98.97 99.01 99.02 99.02







17

LV Bushings


Latching eyes

Filling Device





Earth connectionM12


JK

A

H H H

B

D2 D

1C

L

80

J

140

F

Characteristics 24 kV: C0 BK (CC’)From25upto160kVA•InsulationLevel24kVDielectric Liquid Immersed Transformers

Electrical characteristics 24 kV: C0 BK (CC’)Rated Power [kVA] 25 40 50 63 100 160


Vector Group Yzn11 / Yzn5 Dyn/Yzn

No-Load Losses - Po [W] List C0 75 105 125 145 210 300

Load Losses - Pk [W] List Bk 560 750 875 1050 1475 2000


Sound Power Level LwA [dB] List C0 45 47 47 48 49 52



cosƒ=1 97.52 97.91 98.04 98.14 98.34 98.58cosƒ=0.8 96.92 97.40 97.56 97.68 97.94 98.23

load 75%cosƒ=1 97.96 98.27 98.38 98.47 98.63 98.83cosƒ=0.8 97.47 97.85 97.98 98.09 98.30 98.54


A (Length) 888 888 926 926 1006 1205

B (Width) 704 704 704 704 796 848

C (Height to cover) 780 869 848 899 911 847


D3 (Height to MV Plug-In bushings) 869 958 937 988 1000 936





K (wheel width) 40 40 40 40 40 40

Ø (wheel diameter) 125 125 125 125 125 125

L (Wheel) 110 110 110 110 110 110



Total weight [Kg] 380 460 490 548 690 820


18

Characteristics 36 kV: B036 BK36

From250upto5000kVA•InsulationLevel36kVDielectric Liquid Immersed Transformers

Lifting Eyes

LV Plug-In BushingsMV Porcelain Bushings


Thermometer Pocket


Filling Device

LV Plug-In Bushings


Earth connectionM12

Lifting Eyes

LV Plug-In Bushings MV Porcelain Bushings


Thermometer Pocket


MV Porcelain Bushings

Filling Device


Earth connectionM12

F F

KJ J K

J J

J

F F

A

H H H

B

D2

C D3

D2 D1C

LM

M L

A

B

H H H

Electrical characteristics 36 kV: B036 BK36Rated Power [kVA] 250 400 500 630 800 1000 1250 1600 2000 2500(*)


Vector Group Dyn11 / Dyn5

No-Load Losses - Po [W] List B036650 930 1100 1300 1500 1700 2100 2600 3150 3800

Load Losses - Pk [W] List BK363500 4900 5600 6500 8400 10500 13500 17000 21000 26500

Short-Circuit Impedance (%) at 75ºC 4.5 4.5 4.5 4.5 6 6 6 6 6 6

Sound Power Level LwA [dB] List B03662 65 66 67 68 68 70 71 73 76



cosƒ=1 98.37 98.56 98.68 98.78 98.78 98.79 98.77 98.79 98.81 98.80cosƒ=0.8 97.97 98.21 98.35 98.48 98.48 98.50 98.46 98.49 98.51 98.51

load 75%cosƒ=1 98.62 98.79 98.88 98.96 98.97 99.00 98.98 99.00 99.01 99.01cosƒ=0.8 98.28 98.49 98.60 98.71 98.72 98.75 98.72 98.75 98.77 98.77







19

LV Bushings

MV Bushings Surge arresters support (Op)

Lifting Eyes

Latching eyes

Filling Device





Earth connectionM12

Characteristics 36 kV: B036 BK36 From25upto160kVA•InsulationLevel36kVDielectric Liquid Immersed Transformers

F

J

H

A

B

HH

JK

D2

D1

C

L

140

80

FMV Porcelain Bushings

Electrical characteristics 36 kV: C036 BK36Rated Power [kVA] 25 40 50 63 100 160


Vector Group Yzn11 / Yzn5 Dyn/Yzn

No-Load Losses - Po [W] List B036 115 165 190 225 320 460

Load Losses - Pk [W] List Bk36 900 1110 1250 1435 1950 2550

Short-Circuit Impedance (%) at 75ºC 4.5 4.5 4.5 4.5 4.5 4.5

Sound Power Level LwA [dB] List B036 50 51 52 53 56 59



cosƒ=1 96.10 96.91 97.20 97.43 97.78 98.15cosƒ=0.8 95.17 96.17 96.53 96.81 97.24 97.70

load 75%cosƒ=1 96.79 97.44 97.67 97.86 98.15 98.45cosƒ=0.8 96.02 96.82 97.11 97.34 97.69 98.06


A (Length) 888 926 926 926 1006 1205

B (Width) 704 725 725 725 796 848

C (Height to cover) 768 810 810 859 889 847






K (wheel width) 40 40 40 40 40 40

Ø (wheel diameter) 125 125 125 125 125 125

L (Wheel) 110 110 110 110 110 110



Total weight [Kg] 330 430 475 490 610 760

20

Notes


CA-109-EN-1311

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distribution transformers - ormazabal for distribution dielectric liquid immersed transformers...

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