Ormazabal velatia transforma.organic Instruction manual

transforma.organic
General Instructions
IG-234-EN, version 01; 30/12/2015
Electrical distribution transformers
immersed in biodegradable natural dielectric liquid up to
2500 kVA

Legal Deposit: BI-1400/2015
CAUTION!
When medium-voltage equipment is operating, certain components are live, other parts may be in movement and some may reach high
temperatures. Therefore, the use of this equipment poses electrical, mechanical and thermal risks.
Ormazabal designs and manufactures its products according to the principle of integrated safety, based on the following criteria:
• Eliminating hazards wherever possible.
• Where elimination of hazards is not technically or economically feasible, appropriate protection functions are
incorporated in the equipment.
• Provision of information on remaining risks to facilitate the design of operating procedures which prevent such risks,
training for the personnel in charge of the equipment, and the use of suitable measures for personal protection.
• Use of recyclable materials and establishment of procedures for the disposal of equipment and components so that once
the end of their service lives is reached, they are duly processed in accordance, as far as possible, with the
environmental restrictions established by the competent authorities.
Consequently, the equipment to which the present manual refers complies with the requirements of section 11.2 of the IEC standard
62271-1. It must only be operated by qualified and supervised personnel, in accordance with the requirements of standard UNE-EN
50110-1 on the safety of electrical installations and standard UNE-EN 50110-2 on activities in or near electrical installations. Personnel
must be fully familiar with the instructions and warnings contained in this manual and in other recommendations of a more general
nature which are applicable to the situation according to current legislation (MIE-RAT, LEY 31/1995, of 8th November, on the prevention
of occupational hazards. State Journal BOE 269, dated 10th November, and its update in accordance with Royal Decree 54/2003).
The above must be carefully observed, as the correct and safe operation of this equipment depends not only on its design but also on
general circumstances which are in general beyond the control and responsibility of the manufacturer. More specifically:
• The equipment must be handled and transported appropriately from the factory to the place of installation.
• All intermediate storage should occur in conditions which do not alter or damage the characteristics of the equipment or
its essential components.
• Service conditions must be compatible with the equipment rating.
• The equipment must be operated strictly in accordance with the instructions given in the manual, and the applicable
operating and safety principles must be clearly understood.
• Maintenance should be performed properly, taking into account the actual service and environmental conditions in the
place of installation.
The manufacturer declines all liability for any significant indirect damages resulting from violation of the guarantee, under any
jurisdiction, including loss of income, stoppages and costs resulting from repair or replacement of parts.
Warranty
The manufacturer guarantees this product against any defect in materials and operation during the contractual period. In the event that
defects are detected, the manufacturer may opt either to repair or replace the equipment. Improper handling of this equipment and its
repair by the user shall constitute a violation of the guarantee.
Registered Trademarks and Copyrights
All registered trademarks cited in this document are the property of their respective owners. The intellectual property of this manual
belongs to the manufacturer.
In view of the constant evolution in standards and design, the characteristics of the elements contained in this manual are subject to
change without prior notice.
These characteristics, as well as the availability of components, are subject to confirmation by Ormazabal.

3
ContentsGeneral Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
CONTENTS
1 Description and main characteristics 4
1.1 Design, manufacturing and testing . . . . . . . . . 4
1.1.1 Routine or normal tests . . . . . . . . . . . . . . . . . .4
1.1.2 Test protocol . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Transport and handling 6
2.1 Transport on forklift truck . . . . . . . . . . . . . . . . 6
2.2 Transport using a crane . . . . . . . . . . . . . . . . . 6
2.3 Transport on rollers . . . . . . . . . . . . . . . . . . . . . 6
3 Storage 7
4 Installation 8
4.1 Receipt of the transformer . . . . . . . . . . . . . . . . 8
4.2 Location of the transformer . . . . . . . . . . . . . . . 8
4.3 Transformer electrical connections . . . . . . . . . 9
4.3.1 Standard procedure . . . . . . . . . . . . . . . . . . . .9
4.3.2 Special transformers for photovoltaic
or wind applications . . . . . . . . . . . . . . . . . . . . 10
5 Commissioning 11
5.1 Transformer verification before
commissioning . . . . . . . . . . . . . . . . . . . . . . . 11
6 Maintenance 12
6.1 Access for maintenance operations . . . . . . . . 12
6.2 Regular maintenance . . . . . . . . . . . . . . . . . . 12
6.3 Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7 Additional information 14
7.1 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2 Company registration certificate . . . . . . . . . . 14
8 Final appendix 15

4 Description and main characteristics General Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
1 DESCRIPTION AND MAIN CHARACTERISTICS
1.1 Design, manufacturing and testing
Ormazabal's transforma.organic have been designed and
constructed in accordance with mandatory standards. They
meet the testing requirements of Medium Voltage (MV)
legislation in force on the date of manufacture, as well as
particular customer specifications.
1Medium Voltage (MV) bushings 6Enclosure and biodegradable natural dielectric liquid
2Pocket for thermometer installation 7Dragging eyes
3Bracing eyes 8Low Voltage (LV) bushings
4Ferromagnetic nucleus 9Lifting eyes
5Medium Voltage (MV) and Low Voltage (LV) windings
Fig. 1.1: Detail of elements of transforma.organic
transforma.organic is characterised by the use of
biodegradable natural ester dielectric liquid, presenting the
following general characteristics:
►Excellent dielectric properties, with a high water
saturation point, which allows it to maintain high
breakdown voltage values with a high water content
►High burn resistance: natural ester dielectric is
listed as K-class (fire point over 300 °C) according
to Standard IEC 61100. This classification provides
the possibility to avoid the installation of fixed fire
extinguishing systems, as set out in Technical
Instruction ITC-RAT 14 of the High Voltage
Electrical Installations Regulation.
►High biodegradability in ground and water due to its
natural composition
►It is not ecotoxic
►Recyclable and reusable in other favourable
environmental products at the end of its service life.
►Compliant with Standard IEC 62270 "New natural
esters for use in transformers"
1.1.1 Routine or normal tests
The transforma.organic are subjected to routine tests,
which guarantee compliance with the following standards:
►Winding resistance measurement:
IEC-60076-1
►Transformation ratio measurement and check of
connections group:
IEC 60076-1
►Measurement of load losses and short-circuit
voltage at main tapping:
IEC 60076-1
►Losses and no-load current measurement:
IEC 60076-1
►Power frequency voltage test:
IEC 60076-3

5
Description and main characteristicsGeneral Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
►Induced voltage test:
IEC 60076-3
1.1.2 Test protocol
All the information regarding the tests the
transforma.organic has been put through is recorded in the
"Test Protocol" enclosed with the transformer
documentation.

6 Transport and handling General Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
2 TRANSPORT AND HANDLING
Use the four bracing eyes located on the transformer
corners for its transportation and to prevent damage to the
cooling elements.
The transformers can be transported and handled using a
forklift truck, crane or rollers.
2.1 Transport on a forklift truck
In this case, the transformer must be properly fitted and
fastened to a pallet adequate to handle its weight and
size.Make sure the cooling elements are protected against
possible damage caused by the forklift support.
Fig. 2.1: Transport using a forklift truck
2.2 Transport using a crane
The tank is robust enough for lifting the transformer by
means of the lifting eyes. The following indications must be
taken into account when completely hoisting the
transformer:
►The slings on the eyes must form a minimum angle
of 60º with the transformer’s horizontal.
►The slings must not rub or damage the bushings or
other accessories.
Fig. 2.2: Elevation using a crane
2.3 Transport on rollers
In order to move the transformer by means of its rollers,
lean a lever against the transformer carriage.
CAUTION
Risk of machinery breakage
►The selection of the hoisting elements must be based on
the transformer total weight, shown on the name plate.
DANGER
Risk of death by crushing and damage to the
transformer or to the installation
►Use the eyes in the transformer cover for lifting the
transformer with a crane while maintaining a horizontal
position at all times.
►Avoid causing damage to the elements that are located on
the transformer cover. Use proper hooks to achieve a
perfectly vertical elevation.
CAUTION
Risk of machinery breakage
►Do not use the transformer cooling fins as a fulcrum.

7
StorageGeneral Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
3 STORAGE
If commissioning is not immediate, transformers must be
stored following the recommendations below:
►Store the transformer in a place that is dry and
clean.
►If the transformer is equipped with plug-in terminals,
make sure the conical protector provided for
keeping the connection terminals clean and intact is
in place.
CAUTION
Due to the particular characteristics of natural esters
at low temperatures, it is best to avoid storing these
transformers at temperatures below -5 ºC. For this
reason, we recommend storing in indoor locations.

8 Installation General Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
4 INSTALLATION
4.1 Receipt of the transformer
transforma.organic is supplied prepared for its connection
to Medium Voltage (MV) and Low Voltage (LV) lines. Some
elements, such as the rollers and / or the thermometer,
may be supplied unassembled for shipping.
When the transformer is received (at the customer
warehouse or at the transformer’s final location), it must be
carefully inspected, paying special attention to the
following aspects:
►The characteristics of the transformer, as indicated
on the "Name Plate", must coincide with those in
the "Test Protocol"; and these must correspond with
those specified in the corresponding order.
►Verify the general condition of the transformer and
check for absence of dents, especially on the
cooling equipment and on the Medium Voltage
(MV) and Low Voltage (LV) bushing insulators.
►Verify that the transformer has all of its accessories
(rollers, thermometer, etc.), ensuring they are not
damaged.
If any accessory is missing or damaged,
immediately notify the carrier and Ormazabal.
►The transformer seals must be unbroken and
untouched.
Fig. 4.1: Transformer seal
Manipulating or breaking the seal cancels the
transformer warranty as well as Ormazabal's
liability.
If any anomaly is detected upon receipt of the
transformer, inform Ormazabal immediately. If,
after a 15 day period, the manufacturer has not
received a report of anomalies or defects found, it
is assumed the transformer arrived in perfect
conditions and Ormazabal will not be responsible
for any future anomalies or their consequences.
4.2 Transformer site
The transformer site for both exterior and interior
installations, must allow for adequate cooling.
Both the technical conditions and the personal and
property safety requirements of the transformer's design
and site are defined in the applicable legislation and
standards.
If the transformer is installed indoors, prepare a horizontal
base that supports the transformer. Take into account the
total weight of the transformer, which is indicated on its
"Name Plate".
Lock the rollers to prevent the transformer from moving
during its operation.
CAUTION
Natural esters have higher freezing points than those
of mineral oil. The liquid may freeze during prolonged
exposure to temperatures below -5 ºC. In these
cases, the transformer can be powered without
affecting its physical - chemical properties. However,
the transformer should be protected from low
temperatures during prolonged storage periods.
Poor ventilation of the transformer may cause it to
overheat.

9
InstallationGeneral Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
4.3 Transformer electrical connections
4.3.1 Standard procedure
The steps to follow to complete the electrical transformer
connection are as follows:
1) Verify that the electrical power supply to the
transformer meets the service values indicated in
the transformer’s name plate.
2) Open all the electrical power sources and interlock
or block the necessary switching devices to prevent
the power supply.
3) Verify that electrical voltage is not present.
4) Earth and short-circuit all the electrical power
sources.
5) Delimit and mark the work area properly.
6) Check for correct dielectric liquid level.
7) Connect the transformer's tank to earth, earthing
its different connections using round connection
terminals for a regulation section cable.
Tools:
□Standard cross-section earthing cable.
□Round connecting points of suitable diameter.
□1 M12 screw (M10 to order).
□2, 14 mm (12 mm for M10) washers (one for
each side of the connecting points).
Apply a torque of 40-60 Nm for M12 (25-35 Nm for
M10).
Fig. 4.2: Detail of earth connection of transforma.organic
8) Connect the transformer to the Medium Voltage
circuit (MV). Use flexible connections which do not
place any strain on the transformer bushings,
sufficiently sized to prevent excessive overheating
and, at the same time, allow for the dilatations
caused by heat without damaging the transformer.
DANGER
Risk of death by electric shock and of irreversible
damage to the transformer or to the electrical
installation
►The transformer electrical connections can only be
performed by qualified personnel while always observing
the proper electrical safety measures.
CAUTION
Risk of causing irreversible damage to the
transformer or to the electrical installation.
►Verify that the electric power supply to the transformer
meets the service values indicated in the transformers
name plate.
CAUTION
Risk of causing irreversible damage to the
transformer or to the electrical installation.
►In the case of dielectric liquid leakages, contact the
manufacturer.
CAUTION
Risk of causing irreversible damage to the
transformer or to the electrical installation.
►Start the electrical connection by earthing the transformer
tank.
CAUTION
Danger of irreversible damage to the transformer.
►The torque must guarantee the proper electrical contact of
the connections.
►See the recommended torques in section 8.
CAUTION
Danger of irreversible damage to the transformer.
►The torque must guarantee the proper electrical contact of
the connections.
►See the recommended torques in section 8.

10 Installation General Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
9) Connect the transformer to the Low Voltage (LV)
circuit. Use flexible connections that do not place
any strain on the transformer bushings.Their size
must be enough to prevent excessive overheating
and, at the same time, allow for the dilatations
caused by heat without damaging the transformer.
10) Connect the transformer’s neutral to the electrical
installation’s neutral.
11) Check that the tap changer position is correct; in the
case of a multi-voltage transformer, ensure the
Medium Voltage (MV) winding is connected to the
electrical voltage that is going to be used as service
voltage.
4.3.2 Special transformers for photovoltaic or
wind applications
Transformers to be connected in renewable energy power
plants (photovoltaic and wind) must also take into account
the following considerations (in addition to those of
conventional distribution transformers):
►Transformers may be fitted with an internal
electrostatic shield to mitigate the effects of
disturbance associated to power electronics. The
electrostatic screen must have its connector
bushing identified as P.E. or E.S. and must be
connected rigidly to the transformer station's neutral
earthing.
►The transformers may have more than one
secondary coil. Properly connecting the coils to the
different sources which will supply energy to the
transformer must be taken into account.
DANGER
Risk of death by electric shock and of irreversible
damage to the transformer or to the electrical
installation
►If the transformer is fitted with an electrostatic shield,
connect the screen to the transformation station's neutral
earthing.

11
CommissioningGeneral Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
5 COMMISSIONING
5.1 Transformer verification before
commissioning
Once the transformer is connected to the Medium Voltage
(MV) and Low Voltage (LV) networks, and before
connecting the electrical power source, the following
checks should be performed:
1) Check that the Medium Voltage (MV) network
values and the transformer rated voltage coincide.
2) Feed the no-load transformer and check its correct
connection and regulation by measuring the values
at the Low Voltage side. Whenever energisation
takes place after a prolonged period of exposure to
temperatures below -5 ºC, it is possible that the
dielectric fluid may be in a solid state. Once the load
transformer has been powered, it will recover its
usual liquid stage.
3) Regulate the transformer's voltage using the
corresponding tap changer, taking into account
the safety requirements set out above:
Fig. 5.1: Tap changer in detail in transforma.organic
4) Progressively apply the load until the operating
power is achieved, while ensuring that the
transformer temperature does not go over 105 ºC.
CAUTION
Natural esters have higher freezing points than those
of mineral oil. The liquid may freeze during prolonged
exposure to temperatures below -5 ºC. The
transformer can be powered in these cases, although
these situations should be avoided wherever
possible.
DANGER
Risk of death by electric shock and of irreversible
damage to the transformer or to the electrical
installation
►The tap changer should always be operated without
electrical power.Ensure the handle is well locked and in its
working position.
►Check that the electrical voltage applied corresponds with
the transformer's rated voltage. In case of anomaly,
contact the manufacturer.
►If after commissioning the transformer, it is necessary to
perform an adjustment, follow the safety instructions
specified in section 6.1, Access for Maintenance
Operations, of this document.
CAUTION
If the transformer has been subjected to a prolonged
period at environmental temperatures below
-5 ºC, there is the possibility that the fluid will be in a
solid state before energising. The tap change control
CANNOT be used under these circumstances. The
transformer must be warmed up until the fluid is
liquid enough for the tap change control to be
handled.

12 Maintenance General Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
6 MAINTENANCE
6.1 Access for maintenance operations
Before performing any maintenance operation on the
transformer, follow the measures required by applicable
legislation, including:
1) Disconnect all the electrical power sources for the
Medium Voltage (MV) and Low Voltage (LV) circuits
until the transformer is turned off. Interlock or block
the necessary switching devices to prevent the
power supply.
2) Verify that electrical voltage is not present.
3) Earth and short-circuit all the electrical power
sources.
4) Using an insulating stick, earth the transformer
bushings and ensure that any static electricity is
discharged.
5) Delimit and mark the work area properly.
6) Check that the transformer does not leak dielectric
liquid
Fig. 6.1: Filling device detail
6.2 Periodic maintenance
It is recommended that the transformer undergoes a
periodic visual inspection of the following aspects:
►Water-tightness: check that the transformer does
not leak dielectric liquid.
►Cleaning: check for proper cleanliness and care of
the transformer.
►Noise: check that the transformer does not produce
strange or untimely noises.
Risk of death
►The requirements set out in the applicable legislation on
Transformer Substations to protect people and property
which may be damaged by the installations must also be
met.
DANGER
Risk of death caused by electric shock and of
irreversible damage to the transformer or to the
electrical installation
►Before handling the installation, exactly follow the
instructions of section 6.1 of this document.
►Do not operate the tap changer with electrical power
applied to the transformer.
CAUTION
Risk of causing irreversible damage to the
transformer or to the electrical installation.
►In the event of dielectric liquid leakages, contact
Ormazabal.
DANGER

13
MaintenanceGeneral Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
6.3 Repairs
If the transformer presents any anomaly in its operation,
the user must notify the manufacturer, who must provide
the appropriate instructions.
If, after the transformer inspection, repairs or modifications
are required, these operations must be performed by the
manufacturer.
If a company other than the original manufacturer performs
the repair or modification, they must install a plate on the
transformer indicating the modification or repair performed
and the new characteristics of the transformer.
If someone other than the manufacturer handles
and unseals the transformer, the manufacturer will
no longer be responsible for its operation and
reliability.

14 Additional information General Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
7 ADDITIONAL INFORMATION
7.1 Reliability
As shown by the tests, the transformer leaves the factory
free of defects and is ready to provide service for its entire
service life.
In order to maintain this level of reliability, transformers
must be properly handled, stored, transported and
commissioned, applying the corresponding checks and the
protections established in the Medium Voltage (MV)
Electrotechnical Regulations.
The maintenance instructions listed in this document must
be observed. Additionally, it is required that during its
installation, the necessary precautions are taken to protect
personnel who normally or circumstantially work around it
and that any persons not required for its operation are kept
at a safe distance away from the transformer.
7.2 Company registration certificate
Company record sheet Nº ER – 0227 / 1996, granted by
AENOR – EQ – NET, dated 23/5/1996, guarantees our
Quality Assurance System, from the design and
development stage of the product through to Service After-
sales establishes the management criteria and the
procedures and processes which guarantee the delivery of
transformers which are free of defects, including by
suppliers, applying knowledge and lessons deriving from
investigation and standard and special tests in order to
guarantee a uniform design in the product components, the
manufacture procedures and tests, staff training and the
ongoing improvement of the entire process.

15
Final appendixGeneral Instructions
transforma.organic
IG-234-EN version 01; 30/12/2015
8 FINAL APPENDIX
Torque recommended for Medium Voltage (MV) and Low
Voltage (LV) connections.
(*) The MV bushings include 3 nuts, but only the top 2 can be handled. The purpose of the lower nut is to tighten the insulator gasket;
loosening it could cause leakage of the dielectric liquid.
Tab. 8.1: Recommended Tightening Torque [Nm]
Metric Size M10
Low voltage (LV)
• Connection between nuts. 15-20 70-100 250-350
25-35 40-60
25-35 40-70 100-150
LV busbar connections
(steel screw and nut). 45-60 65-85 95-130
10-15
M12 M16 M20 M30
Wrench Size 17 19 24 30 46
• Fastening the palms to the pin
(stainless steel screws).
• Screws to the surface of the palms.
Medium voltage (MV)
Fastening the bushings to the medium voltage pin
(brass bolt and nuts [*])

Subject to change without
prior notice.
For further information,
contact Ormazabal.
Ormazabal Cotradis
Transformadores S.L.U.
28890 Loeches, Madrid
(Spain)
www.ormazabal.com