MV/LV Transformers for
Distribution Network Solutions
Distribution
Transformers
Up to 36 kV and up to 5 MVA
IEC Standards
Reliable innovation. Personal solutions.
www.ormazabal.com
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Contens
Introduction__________________________ 1
Preface1
Your Electrical Network
2
Your Business and DNS Applications
2
Our Product Map (SSS & DNS)
3
Main features ________________________ 4
Safety4
Reliability6
Efficiency 6
Sustainability 7
Continuous innovation
7
Technical details_______________________ 8
Family8
Applied Standards
8
Constructive structure
8
Design characteristics___________________ 9
Low voltage connection
9
Medium voltage connection
9
Standard equipment
10
Optional equipment
11
Other dielectric liquids
Type
of transformers_____________________________________
Characteristics 24 kV: D0 CK (AB’) 11
12
12
Characteristics 24 kV: C0 CK (AC’) 14
Characteristics 24 kV: C0 BK (CC’)
16
Characteristics 36 kV: B036 BK3618
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 transformers
Transformers for Distribution
Network Solutions up to 36 kV
Introduction
Preface
The incorporation into Ormazabal
in 2001 of the distribution transformer
manufacturer Cotradis constituted a
strategic milestone for us.
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.
The exchange of know-how between
our technical teams has significantly
reinforced the value added for our
customers.
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.
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 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.
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.
Kalkbukt PV Plant
(Republic of South Africa)
Furthermore, close collaboration
with our customers enables us to
develop transformers conforming to
their own particular standards and
specifications.
Athletic Bilbao Stadium
(Bilbao, Spain)
Public Distribution
EDF utility (France)
1
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Your Electrical Network
"Your dedicated partner for reliable and intelligent electrical network"
Your Business and DNS Applications
Close 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.
2
Smart Grid
Transmission & Distribution
Generation
Infrastructures
Industrial
Tertiary
Wind
Solar
Dispatchable RES
Distributors
OEM
EPC
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Our Product Map (SSS & DNS)
Our Business Lines
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.
SSS: Substation Solution for
primary distribution
We provide our clients with
personalised projects for efficient
energy management via Primary
and Secondary Distribution
equipment and solutions.
DNS: Distribution Network
Solutions for secondary
distribution
Our products for your segment
CPG.1
CPG.0
CGM.3
GAE
1250kMAX
GAE
Protection, automation and control
CiBOR
AMC
A-CiBOR
GA
Walk-in
Compact
Concrete enclosure for transformer substations (TS)
Underground
CGMCOSMOS
[IEC - ANSI/IEEE]
ORMACONTAINER
Prefabricated
substations
CGMCOSMOS
[HN]
EA
Distribution transformers
Conventional oil
Concrete prefabricated transformer substations (TS)
Underground
NVL-CiBOR
Walk-in
Current® family
ekorSYS family
Advanced metering,
sensing & analytics
and communications
Protection, automation
and control
Modular
Low voltage
board
ORGANIC
TPC
Metallic
prefabricated TS
CEADS
Switching
nodes
Metallic enclosure
for TS
Photovoltaic
substation
Mobile
substation
3
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Main features
Safety
Our 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 test
Type test
All of the transformers manufactured
are subjected to the following
routine tests, in accordance with
IEC 60076-1:
With our customer’s agreement,
the following tests are performed in
accordance with current international
regulations:
• Winding resistance measurement.
• Temperature-rise test.
• Measurement of the voltage ratio
and verification of the vector
group.
• Dielectric type tests:
• Measurement of the short-circuit
impedance and load losses.
• Measurement of no -load losses
and current.
[kV]
• 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
LV
Highest voltage for the equipment, Um,
(Insulation Level).
12 17.5 24
36
1.1 3.6
Rated withstand Voltage of the test (1 minute).
[kV]
28
38
50
70
MV
3
LV
Highest voltage for the equipment, Um,
(Insulation Level).
12
17.5
24
36
1.1
3.6
Rated withstand Voltage for Lightning impulse
test (1.2 / 50μs).
• Separate source AC withstand
voltage test (also known as
Applied over-voltage test or
Power frequency test)
[kV]
Lightning impulse (LI) test
[kV]
• Dielectric routine tests:
4
• Lightning impulse (LI) test.
10
75
95
125
170
20
20
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Special test
Additional test
Special tests specifically requested by
the customer:
Dielectric Oil Tests
• 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.
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
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
• Breakdown voltage
• Dielectric dissipation factor
• Interfacial tension
• Acidity
• Flash point
• Measurement of insulation
resistance and/or measurement
of the dissipation factor (tan delta)
of the insulation capacitances.
5
Dielectric liquid immersed transformers
Reliability
Efficiency
The quality and reliability of our
products is demonstrated through
the testing and certification of
our transformers in independent,
internationally-renowned laboratories.
Dielectric Liquid
completely immersed
Hermetically-Sealed
Transformer
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.
• 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.
6
Transformers for Distribution
Network Solutions up to 36 kV
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.
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
PCB Free
• Our transformers are only
manufactured using new
components and without any
PCBs, in strict compliance with
current regulations.
Sustainability
Continuous innovation
Sustainability, understood as the best
compromise between satisfying social
demands, caring for the environment
and financial aspects.
Our commitment to innovation places
us at the technological forefront of
Europe.
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
Electromagnetic
Compatibility
Our 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 lowvoltage 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.
• 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.
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 environmentallyresponsible 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.
7
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Technical details
Family
Constructive structure
From 25 to 5000 kVA •
Insulation Level 24 and 36 kV
Active part
Tank and dielectric
The active part of the transformer is
the energy transformation system,
composed of the ferromagnetic core,
the windings and the medium and
low voltage connections.
The transformer’s tank and the
dielectric liquid provide the necessary
insulation and cooling.
Dielectric Liquid Immersed
Transformers
Description
These transformers comply with the
following characteristics:
• Three-phase transformers,
50 Hz for installation indoors or
outdoors
2
• Hermetically-sealed
1
• 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.
1. Active part
2. Tank and dielectric
WindingsAdvantages
• 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.
Applied Standards
• Expertise in coil cooling.
• Careful manufacturing of coils and cooling
channels.
• Improved heat dissipation in the
windings.
The transformers comply with the
following standards:
• Use of high-quality cellulosic materials.
• Optimum handling and storage to preserve
insulation properties.
• Guaranteed insulation.
For other configurations, please contact
our Technical-Commercial Department.
•EN 50464
•IEC 60076
Connections and Tap Changer
• MV and LV terminals.
• Transformer connection to the
outside.
• Off-circuit Tap changer.
• Secondary voltage can be adjusted
precisely.
Tank and Dielectric Liquid
8
Advantages
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.
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Design characteristics
LV single phase Busbar
Bushings (optional)
LV connection Flags
Metric: from M20 to M55
Metric M12
Low voltage connection
LV 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
[A]
250
250
250
250
250
250
630
630
1000
1000
1600
1600
2000
3150
3150
4000
M12
M12
M12
M12
M12
M12
M20
M20
M30
M30
M42
M42
M42
M48
M48
M55
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Brass
Copper
Copper
Copper
Copper
M12
M12
M12
M12
M12
M12
M20
M20
M30
M30
M42
M42
M42
M48
M48
M55
Rated current
Dimension - Metric d1
Material
Connections parts – LV Flags
Metric
e [mm]
f0 [mm]
Ø [mm]
-
-
-
-
-
-
32
32
32
32
40
40
40
40
40
70
40
40
40
40
40
40
60
60
60
60
100
100
100
120
120
150
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
Rated current
Material
[kVA]
25
40
50
63
100
160
250
400
500
630
800
1000
1250
1600
2000
2500
[A]
-
-
-
-
-
-
630
630
1600
1600
1600
1600
-
-
-
-
-
-
-
-
-
-
Al
Al
Copper
Copper
Copper
Copper
-
-
-
-
Please contact Ormazabal for ohter secondary voltages and technical values above 2500 kVA.
Medium voltage connection
Connectors 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
-
9
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Standard equipment
1
4
2
9
7
3
2
8
12
10
11
13
6
5
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
4. LV connection Flags
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
10
EN 50386
≥630 kVA
≥250 kVA
EN-50216-4
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Optional equipment
6
1
2
4
3
7
7
5
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).
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.
11
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Type of transformers
Characteristics 24 kV: D0 CK (AB’)
From 250 up to 5000 kVA • Insulation Level 24 kV
Dielectric Liquid Immersed Transformers
MV Plug-In Bushings
F
Filling
Device
J
Draining and
Sampling
Device
H H H
J
K
Thermometer
Pocket
Filling
Device
B
B
MV Regulation
Tap Changer
A
A
Electrical characteristics
24 kV: D0 CK (AB’)
Rated Power [kVA]
Rated Voltage (Ur)
J
Draining and
Sampling
Device
H H H
Thermometer Pocket
MV Regulation
Tap Changer
C
D1
Earth
connection
M12
Wheel
Frames
(skids)
L
K
M
J
LV Bushings
C
D3
D2
Earth
connection
M12
Wheel
Frames
(skids)
MV Bushings
Lifting
Eyes
MV Bushings
L
LV Bushings
MV Porcelain Bushings
F
D2
F
M
F
Lifting
Eyes
250
400
500
630
800
1000
1250
20
400 / 410 / 415 / 420 (to be defined)
Dyn11/ Dyn5
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
1600
2000
2500(*)
List D0
530
750
880
1030
1150
1400
1750
2200
2700
3200
List Ck
3250
4600
5500
6500
8400
10500
13500
17000
21000
26500
4
4
4
4
6
6
6
6
6
6
List D0
60
63
64
65
66
68
69
71
73
76
1.37
3.33
98.51
98.15
98.76
98.45
1.22
3.25
98.68
98.36
98.90
98.63
1.16
3.21
98.75
98.44
98.96
98.70
1.11
3.17
98.82
98.53
99.02
98.78
1.19
4.44
98.86
98.58
99.06
98.83
1.22
4.47
98.82
98.53
99.04
98.80
1.25
4.49
98.79
98.50
99.01
98.77
1.24
4.48
98.81
98.52
99.03
98.79
1.22
4.47
98.83
98.54
99.04
98.81
1.23
4.47
98.83
98.54
99.04
98.81
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D3 (Height to MV Plug-In bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
250
400
500
630
800
1000
1250
1600
2000
2500
1376
1537
1622
1622
1932
1997
2007
1922
1965
2093
930
941
962
962
1161
1200
1200
1224
1277
1487
915
1004
1026
1092
1112
1158
1230
1517
1715
1737
1300
1389
1411
1477
1497
1543
1615
1902
2100
2122
1004
1093
1115
1181
1201
1247
1319
1606
1804
1826
1149
1238
1287
1353
1445
1491
1563
1886
2084
2167
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)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
670
670
670
670
670
670
820
820
820
1070
Oil Volume [Litres]
Total weight [Kg]
40
40
40
40
40
40
70
70
70
70
125
125
125
125
125
125
200
200
200
200
110
110
110
110
110
110
165
165
165
165
260
330
390
410
510
530
540
1000
1200
1400
1010
1330
1600
1750
2250
2430
2750
3850
4750
5350
(*) Please contact Ormazabal for technical values above 2500 kVA.
12
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Characteristics 24 kV: D0 CK (AB’)
From 25 up to 160 kVA • Insulation Level 24 kV
Dielectric Liquid Immersed Transformers
MV Porcelain Bushings
F
Lifting
Eyes
F
MV Bushings
Surge arresters support (Op)
LV Bushings
D1
80
C
D2
140
Latching
eyes
Wheel Frames
(skids)
Filling
Device
K
J
H
H
H
L
L
Earth
connection
M12
Draining and
Sampling
Device
J
Thermometer Pocket
(optional)
B
MV Regulation
Tap Changer
A
Electrical characteristics
24 kV: D0 CK (AB’)
Rated Power [kVA]
Rated Voltage (Ur)
25
40
50
63
100
20
400 / 410 / 415 / 420 (to be defined)
Yzn11/Dyn11
List D0
95
125
145
175
260
375
List Ck
700
940
1100
1270
1750
2350
4
4
4
4
4
4
List D0
47
49
50
51
54
57
2.84
3.96
96.92
96.18
97.46
96.84
2.40
3.83
97.41
96.78
97.87
97.35
2.26
3.77
97.57
96.98
98.00
97.52
2.08
3.70
97.76
97.21
98.15
97.70
1.81
3.57
98.03
97.55
98.37
97.97
1.54
3.43
98.33
97.92
98.61
98.26
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
160
Dyn/Yzn
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D3 (Height to MV Plug-In bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
25
40
50
63
100
160
888
888
888
926
1006
1205
704
704
704
735
796
848
768
810
810
844
889
847
1153
1195
1195
1229
1274
1232
857
899
899
933
978
936
918
960
960
994
1039
997
275
275
275
275
275
275
80
80
80
80
80
80
J (Distance between wheel axis)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
Distance between pole mounting brackets
520
520
520
520
520
520
Oil Volume [Litres]
Total weight [Kg]
H (separation between LV bushings)
40
40
40
40
40
40
125
125
125
125
125
125
110
110
110
110
110
110
530
530
530
530
530
530
100
105
105
120
155
200
360
400
435
515
610
770
13
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Characteristics 24 kV: C0 CK (AC’)
From 250 up to 5000 kVA • Insulation Level 24 kV
Dielectric Liquid Immersed Transformers
MV Plug-In Bushings
F
L
J
K
Thermometer
Pocket
Filling
Device
B
B
MV Regulation
Tap Changer
A
A
Electrical characteristics
24 kV: C0 CK (AC’)
Rated Power [kVA]
Rated Voltage (Ur)
J
Draining and
Sampling
Device
H H H
Thermometer Pocket
MV Regulation
Tap Changer
C
D1
Earth
connection
M12
Wheel
Frames
(skids)
J
Draining and
Sampling
Device
H H H
LV Bushings
C
D3
D2
Filling
Device
K
M
J
MV Bushings
Lifting
Eyes
MV Bushings
Earth
connection
M12
Wheel
Frames
(skids)
MV Porcelain Bushings
F
L
LV Bushings
D2
F
M
F
Lifting
Eyes
250
400
500
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
630
800
1000
1250
20
400 / 410 / 415 / 420 (to be defined)
Dyn11/ Dyn5
1600
2000
2500(*)
List C0
425
610
720
860
930
1100
1350
1700
2100
2500
List Ck
3250
4600
5500
6500
8400
10500
13500
17000
21000
26500
4
4
4
4
6
6
6
6
6
6
List C0
55
58
59
60
61
63
64
66
68
71
1.37
3.33
98.55
98.20
98.81
98.52
1.22
3.25
98.71
98.40
98.95
98.69
1.17
3.22
98.77
98.47
98.99
98.74
1.11
3.17
98.85
98.56
99.05
98.82
1.22
4.47
98.85
98.56
99.07
98.84
1.22
4.47
98.85
98.57
99.07
98.85
1.25
4.49
98.83
98.54
99.06
98.82
1.24
4.48
98.84
98.56
99.07
98.84
1.25
4.48
98.83
98.55
99.06
98.83
1.23
4.47
98.85
98.57
99.08
98.85
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D3 (Height to MV Plug-In bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
250
400
500
630
800
1000
1250
1600
2000
2500
1376
1537
1622
1622
1932
1997
2007
1922
1965
2157
930
941
962
962
1161
1245
1224
1224
1277
1487
960
1004
1026
1114
1123
1158
1252
1517
1715
1737
1345
1389
1411
1499
1508
1543
1637
1902
2100
2122
1049
1093
1115
1203
1212
1247
1341
1606
1804
1826
1194
1238
1287
1375
1456
1491
1585
1886
2084
2167
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)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
670
670
670
670
670
670
820
820
820
1070
Oil Volume [Litres]
Total weight [Kg]
40
40
40
40
40
40
70
70
70
70
125
125
125
125
125
125
200
200
200
200
110
110
110
110
110
110
165
165
165
165
270
320
390
395
480
510
550
1020
1230
1390
1090
1355
1640
1835
2310
2510
2905
4020
4850
5525
(*) Please contact Ormazabal for technical values above 2500 kVA.
14
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Characteristics 24 kV: C0 CK (AC’)
From 25 up to 160 kVA • Insulation Level 24 kV
Dielectric Liquid Immersed Transformers
MV Porcelain Bushings
F
Lifting
Eyes
F
MV Bushings
Surge arresters support (Op)
LV Bushings
D1
D2
140
Latching
eyes
C
80
Wheel Frames
(skids)
Filling
Device
K
J
H
H
H
L
L
Earth
connection
M12
Draining and
Sampling
Device
J
Thermometer Pocket
(optional)
B
MV Regulation
Tap Changer
A
Electrical characteristics
24 kV: C0 CK (AC’)
Rated Power [kVA]
Rated Voltage (Ur)
25
40
50
63
100
20
400 / 410 / 415 / 420 (to be defined)
Dyn11/ Dyn5
List C0
75
105
125
145
210
300
List Ck
700
940
1100
1270
1750
2350
4
4
4
4
4
4
List C0
45
47
47
48
49
52
2.84
3.96
96.99
96.27
97.56
96.97
2.40
3.83
97.45
96.84
97.93
97.43
2.26
3.77
97.61
97.03
98.06
97.58
2.08
3.70
97.80
97.27
98.21
97.78
1.81
3.57
98.08
97.61
98.43
98.05
1.54
3.43
98.37
97.97
98.67
98.34
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
160
Dyn/Yzn
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D3 (Height to MV Plug-In bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
25
40
50
63
100
160
888
888
888
926
1.006
1.205
704
704
704
735
796
848
780
869
828
859
911
847
1165
1254
1213
1244
1296
1232
869
958
917
948
1.000
936
930
1.019
978
1.009
1.061
997
275
275
275
275
275
275
80
80
80
80
80
80
J (Distance between wheel axis)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
Distance between pole mounting brackets
520
520
520
520
520
520
Oil Volume [Litres]
Total weight [Kg]
H (separation between LV bushings)
40
40
40
40
40
40
125
125
125
125
125
125
110
110
110
110
110
110
530
530
530
530
530
530
100
110
100
125
150
190
370
440
445
520
670
790
15
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Characteristics 24 kV: C0 BK (CC’)
From 250 up to 5000 kVA • Insulation Level 24 kV
Dielectric Liquid Immersed Transformers
LV Plug-In Bushings
F
Lifting
Eyes
Filling Device
L
M
K
J
J
Draining and
Sampling
Device
H H H
C
Earth
connection
M12
Wheel
Frames
(skids)
J
K
J
Draining and
Sampling
Device
H H H
Thermometer
Pocket
L
Earth
connection
M12
Wheel
Frames
(skids)
MV Porcelain
Bushings
LV Plug-In Bushings
C
D3
D2
LV Plug-In Bushings
MV Porcelain Bushings
F
Thermometer
Pocket
Filling Device
B
MV Regulation
Tap Changer
B
MV Regulation
Tap Changer
A
A
Electrical characteristics
24 kV: C0 BK (CC’)
Rated Power [kVA]
Rated Voltage (Ur)
250
400
500
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
630
800
1000
1250
20
400 / 410 / 415 / 420 (to be defined)
Dyn11/ Dyn5
1600
2000
2500(*)
List D0
425
610
720
860
930
1100
1350
1700
2100
2500
List Bk
2750
3850
4600
5400
7000
9000
11000
14000
18000
22000
4
4
4
4
6
6
6
6
6
6
List C0
55
58
59
60
61
63
64
66
68
71
1.17
3.22
98.75
98.44
98.96
98.70
1.04
3.13
98.90
98.63
99.08
98.86
1.00
3.10
98.95
98.69
99.13
98.91
0.93
3.06
99.02
98.77
99.18
98.98
1.05
4.35
99.02
98.78
99.20
99.00
1.08
4.37
99.00
98.75
99.19
98.98
1.06
4.38
98.98
98.73
99.17
98.97
1.05
4.35
99.03
98.79
99.21
99.01
1.08
4.35
99.03
98.79
99.21
99.02
1.06
4.35
99.03
98.79
99.21
99.02
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D3 (Height to MV Plug-In bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
250
400
500
630
800
1000
1250
1600
2000
2500
1376
1537
1622
1569
1997
1997
2007
1965
1965
2480
930
941
962
962
1200
1200
1182
1277
1277
1426
915
1004
1092
1169
1158
1158
1373
1671
1715
1836
1300
1389
1477
1554
1543
1543
1758
2056
2100
2221
1004
1093
1181
1258
1247
1247
1462
1760
1804
1925
1149
1238
1353
1430
1491
1491
1706
2040
2084
2266
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)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
670
670
670
670
670
670
820
820
820
1070
Oil Volume [Litres]
Total weight [Kg]
40
40
40
40
40
40
70
70
70
70
125
125
125
125
125
125
200
200
200
200
110
110
110
110
110
110
165
165
165
165
260
325
390
390
520
500
660
1200
1245
1340
1100
1420
1810
1920
2530
2560
3200
4950
5150
5750
(*) Please contact Ormazabal for technical values above 2500 kVA.
16
D1
MV Porcelain
Bushings
D2
F
M
F
Lifting
Eyes
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Characteristics 24 kV: C0 BK (CC’)
From 25 up to 160 kVA • Insulation Level 24 kV
Dielectric Liquid Immersed Transformers
MV Porcelain Bushings
F
Lifting
Eyes
F
MV Bushings
Surge arresters support (Op)
LV Bushings
D1
80
C
D2
140
Latching
eyes
Wheel Frames
(skids)
Filling
Device
K
J
H
H
H
L
Earth
connection
M12
Draining and
Sampling
Device
J
Thermometer Pocket
(optional)
B
MV Regulation
Tap Changer
A
Electrical characteristics
24 kV: C0 BK (CC’)
Rated Power [kVA]
Rated Voltage (Ur)
25
40
50
63
100
20
400 / 410 / 415 / 420 (to be defined)
Yzn11 / Yzn5
List C0
75
105
125
145
210
300
List Bk
560
750
875
1050
1475
2000
4
4
4
4
4
4
List C0
45
47
47
48
49
52
2.29
3.79
97.52
96.92
97.96
97.47
1.94
3.63
97.91
97.40
98.27
97.85
1.81
3.57
98.04
97.56
98.38
97.98
1.73
3.53
98.14
97.68
98.47
98.09
1.54
3.43
98.34
97.94
98.63
98.30
1.32
3.31
98.58
98.23
98.83
98.54
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
160
Dyn/Yzn
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D3 (Height to MV Plug-In bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
25
40
50
63
100
160
888
888
926
926
1006
1205
704
704
704
704
796
848
780
869
848
899
911
847
1165
1254
1233
1284
1296
1232
869
958
937
988
1000
936
930
1019
998
1049
1061
997
275
275
275
275
275
275
80
80
80
80
80
80
J (Distance between wheel axis)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
Distance between pole mounting brackets
520
520
520
520
520
520
Oil Volume [Litres]
Total weight [Kg]
H (separation between LV bushings)
40
40
40
40
40
40
125
125
125
125
125
125
110
110
110
110
110
110
530
530
530
530
530
530
100
110
115
125
160
190
380
460
490
548
690
820
17
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Characteristics 36 kV: B036 BK36
From 250 up to 5000 kVA • Insulation Level 36 kV
Dielectric Liquid Immersed Transformers
MV Porcelain Bushings
LV Plug-In Bushings
F
Lifting
Eyes
F
LV Plug-In Bushings
F
MV Porcelain Bushings
F
LV Plug-In Bushings
MV Porcelain Bushings
C
D1
D2
C
D3
D2
Lifting
Eyes
H H H
Thermometer
Pocket
H H H
Filling Device
J
Draining and
Sampling
Device
Thermometer
Pocket
B
MV Regulation Tap
Changer
MV Regulation
Tap Changer
A
A
Electrical characteristics
36 kV: B036 BK36
Rated Power [kVA]
Rated Voltage (Ur)
K
J
L
L
J
Draining and
Sampling
Device
Earth
connection
M12
Wheel
Frames
(skids)
B
Filling Device
K
M
J
Earth
connection
M12
M
J
Wheel
Frames
(skids)
250
400
500
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
630
800
1000
1250
25
400 / 410 / 415 / 420 (to be defined)
Dyn11 / Dyn5
1600
2000
2500(*)
List B036
List BK36
650
930
1100
1300
1500
1700
2100
2600
3150
3800
3500
4900
5600
6500
8400
10500
13500
17000
21000
26500
4.5
4.5
4.5
4.5
6
6
6
6
6
6
List B036
62
65
66
67
68
68
70
71
73
76
1.49
3.72
98.37
97.97
98.62
98.28
1.32
3.62
98.56
98.21
98.79
98.49
1.21
3.55
98.68
98.35
98.88
98.60
1.13
3.50
98.78
98.48
98.96
98.71
1.22
4.47
98.78
98.48
98.97
98.72
1.22
4.47
98.79
98.50
99.00
98.75
1.25
4.49
98.77
98.46
98.98
98.72
1.24
4.48
98.79
98.49
99.00
98.75
1.22
4.47
98.81
98.51
99.01
98.77
1.23
4.47
98.80
98.51
99.01
98.77
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D3 (Height to MV Plug-In bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
250
400
500
630
800
1000
1250
1600
2000
2500
1376
1537
1622
1592
1932
1997
2007
1922
1965
2093
930
941
962
962
1161
1200
1200
1224
1277
1487
915
1004
1026
1092
1112
1158
1230
1517
1715
1737
1368
1442
1464
1530
1550
1596
1668
1955
2153
2175
1050
1139
1161
1227
1247
1293
1365
1652
1850
1872
1149
1238
1287
1353
1445
1491
1563
1886
2084
2167
375
375
375
375
375
375
375
375
375
375
H (separation between LV bushings)
150
150
150
150
150
150
150
200
200
200
J (Distance between wheel axis)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
670
670
670
670
670
670
820
820
820
1070
Oil Volume [Litres]
Total weight [Kg]
40
40
40
40
40
40
70
70
70
70
125
125
125
125
125
125
200
200
200
200
110
110
110
110
110
110
165
165
165
165
260
340
390
410
500
530
550
1000
1200
1400
1000
1330
1600
1800
2220
2480
2780
3850
4850
5350
(*) Please contact Ormazabal for technical values above 2500 kVA.
18
Dielectric liquid immersed transformers
Transformers for Distribution
Network Solutions up to 36 kV
Characteristics 36 kV: B036 BK36
From 25 up to 160 kVA • Insulation Level 36 kV
Dielectric Liquid Immersed Transformers
F
F
MV Porcelain Bushings
Surge arresters support (Op)
MV Bushings
Lifting
Eyes
LV Bushings
D1
80
C
D2
140
Latching
eyes
K
Wheel Frames
(skids)
Draining and
Sampling
Device
J
H
H
H
J
Thermometer Pocket
(optional)
B
Filling
Device
L
Earth
connection
M12
MV Regulation
Tap Changer
A
Electrical characteristics
36 kV: C036 BK36
Rated Power [kVA]
Rated Voltage (Ur)
25
Primary [kV]
No-load Secondary [V]
Vector Group
No-Load Losses - Po [W]
Load Losses - Pk [W]
Short-Circuit Impedance (%) at 75ºC
Sound Power Level LwA [dB]
Voltage drop at full load (%)
load
100%
load
75%
Efficiency (%)
40
50
63
100
20
400 / 410 / 415 / 420 (to be defined)
Yzn11 / Yzn5
160
Dyn/Yzn
List B036
115
165
190
225
320
460
List Bk36
900
1110
1250
1435
1950
2550
4.5
4.5
4.5
4.5
4.5
4.5
50
51
52
53
56
59
3.64
4.50
96.10
95.17
96.79
96.02
2.84
4.35
96.91
96.17
97.44
96.82
2.57
4.26
97.20
96.53
97.67
97.11
2.35
4.17
97.43
96.81
97.86
97.34
2.03
4.01
97.78
97.24
98.15
97.69
1.68
3.83
98.15
97.70
98.45
98.06
List B036
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
cosƒ=1
cosƒ=0.8
Dimensions [mm]
Rated Power [kVA]
A (Length)
B (Width)
C (Height to cover)
D1 (Height to MV with porcelain bushings)
D2 (Height to LV with Flags)
F (Separation between MV bushings)
25
40
50
63
100
160
888
926
926
926
1006
1205
704
725
725
725
796
848
768
810
810
859
889
847
1221
1263
1263
1312
1342
1300
918
960
960
1009
1039
997
375
375
375
375
375
375
80
80
80
80
80
80
J (Distance between wheel axis)
K (wheel width)
Ø (wheel diameter)
L (Wheel)
Distance between pole mounting brackets
520
520
520
520
520
520
Oil Volume [Litres]
Total weight [Kg]
H (separation between LV bushings)
40
40
40
40
40
40
125
125
125
125
125
125
110
110
110
110
110
110
530
530
530
530
530
530
100
125
130
130
160
200
330
430
475
490
610
760
19
Dielectric liquid immersed transformers
Notes
20
Transformers for Distribution
Network Solutions up to 36 kV
www.ormazabal.com
CA-109-EN-1311