S.E.A. Società Elettromeccanica Arzignanese S.p.A.
Technology, Reliability, Safety, Sustainability
SEA is one of the world's leading manufacturers of liquid immersed or dry-type (with cast resin or air-insulated windings) transformers, reactors and coils.
We offer standard and customized solutions for the renewable/non-renewable, industrial, civil, transportation (traction, marine, etc.), oil & gas, mining, energy transition, data centers, battery storage, hydrogen sectors.
The company enjoys its brand recognition thanks to its sales worldwide since 1959.
We want to evolve industrial knowledge and provide solutions that improve well-being, sustainability and productivity. We want to increase energy efficiency in the digital age.
We aim to be a leading manufacturer of transformers, reactors and electromechanical components known for state-ofthe-art technology, quality and commitment to customer satisfaction.
Technology, reliability and safety are the principles that guide our actions.
Innovation and sustainability are the values that guide our evolution toward the challenges of the future.
Product Portfolio
Liquid immersed transformers
TTO
Small and medium distribution transformers with rated power from 25 kVA up to 3150 kVA and primary voltage up to 36 kV.
Possible available construction types are:
- hermetic with integral filling
- with conservator
- hermetic with nitrogen/dry air cushion
- with expandable radiators.
They are designed according to the following Standards:
- IEC 60076
- Ecodesign Regulation EU/548/2014
- Other standards upon specific customer request (e.g. ANSI/IEEE, etc.)
OTN
Power transformers with rated power up to 180 MVA and primary voltage up to 245 kV.
They are designed according to the following Standards:
- IEC 60076
- Ecodesign Regulation EU/548/2014
- Other standards upon specific customer request (e.g. ANSI/IEEE, etc.)
OTR
Rectifier and converter transformers used for industrial applications with power ratings up to 120 MVA, primary voltage up to 170 kV and secondary current up to 50 kA.
They can be used up to 72 pulses.
They are designed according to the following Standards:
- IEC 60076
- Other standards upon specific customer request (e.g., ANSI/IEEE, etc.)
OTF
Furnace transformers with rade power up to 150 MVA, primary voltage up to 72.5 kV and secondary current up to 120 kA.
They are designed according to the following Standards:
- IEC 60076
- Other standards upon specific customer request (e.g., ANSI/IEEE, etc.)
Dry-type transformers
TTR
Small and medium distribution transformers with rated power from 25 kVA up to 3150 kVA and primary voltage up to 36 kV, designed according to the following Standards:
- IEC 60076
- Ecodesign Regulation EU/548/2014
- Other standards upon specific customer request (e.g. ANSI/IEEE, etc.)
TTR
Power transformers with power rating up to 30 MVA and primary voltage up to 72.5 kV, designed according to the following Standards:
- IEC 60076
- Ecodesign Regulation EU/548/2014
- Other standards upon specific customer request (e.g. ANSI/IEEE, etc.)
TTR
Special rectief and converter transformers for industrial applications with rated power up to 30 MVA, primary voltage up to 72.5 kV.
They can be used up to 72-pulse operation.
They are designed according to the following Standards:
- IEC 60076
- Other standards upon specific customer request (e.g., ANSI/IEEE, etc.)
TTH
Air-insulated transformers with rated power up to 25 MVA and primary voltage up to 40.5 kV.
They are designed according to the following Standards:
- IEC 60076
- Other standards upon specific customer request (e.g., ANSI/IEEE, etc.)
Three-phase or single-phase reactors:
- Petersen coils regulated by steps (with no load tap changer)
- Petersen coils stepless (regulated by motordrive)
- Shunt reactors (fixed and variable type)
- Earthing transformers (neutral couplers)
- Series reactors (current limiting reactors, neutral earthing reactors)
- Reactors for special applications (filter tuning, damping, smoothing, furnace, harmonic filtering and power factor correction reactors).
Two different types are available: liquid immersed type and dry-type.
The rated power for liquid immersed type is up to 30/50 MVAr and the insulation level up to 750 kV.
The rated power for dry-type type is up to 15 MVAr and the insulation level up to 200 kV
The Main Advantages of SEA Transformers
Performance and resistance to overloads
High capacity to withstand overloads and disturbances. Excellent performance under seismic events or high vibration.
Low noise
High quality material and specific design to reduce noise in quiet areas.
Eco+POWER
Expressly designed to best meet new requirements in renewable energy production. Transformers Liquid immersed transformers are also available with natural or synthetic liquid for reduced risk of environmental impact during operating life.
Cast resin transfortmers have no fire risk caused by flammable materials.
The materials used are largely recyclable
Cost-effectiveness
Special design with high efficiency to reduce purchase, operation and maintenance costs.
Compactness
Compact design to fit all installation needs.
Durability
Designed to withstand the most extreme conditions for long life.
The New design distribution cast resin transformers TTR ECO+P "Z SERIES"
Innovative cast resin transformers design
The Innovative design of cast resin transformers according to EU Regulation No. 548/2014
The winning solution for sustainability combining energy efficiency and environmental compliance.
Key advantages:
- Reduction of the vibrations which means very low noise levels
- Improved air cooling circulation
- Reduction of adding losses
- Reduction of hot spots
- Higher efficiency levels
- Possibility of using side rods to attach auxiliary services cables Interchangeability of rods for connecting cables
- Versatility of lower metal structure for positioning accessories Improved stability of the entire winding structure
- Minimized risk of damage during handling Improved reliability of the entire system
- Higher performance with lower weights
- Reduction of equivalent CO2 emissions into atmosphere
E4-C5-F1 Certification
SEA cast resin transformers, in the “standard” execution, are certifi ed in
compliance with the IEC 60076-11:2018 standard for the environmental,
climatic and fire resistance classes E2-C2-F1.
Our transformers can be requested even with higher performance technical
features thanks to the certifi cation that SEA has obtained on the same cast
resin transformer for the E4-C5-F1 classes.
E4
C5
F1
