Tamini Transformers

What Tamini Transformers does

Tamini Trasformatori S.r.l. is an Italian designer and manufacturer of power and industrial transformers, founded in 1916 and headquartered in Legnano (Milan). The company is wholly owned by Terna Energy Solutions (TES) Group, itself part of Terna S.p.A., Italy's largest transmission system operator. Tamini operates six production plants across Italy (Legnano, Ospitaletto, Valdagno, Novara, Rodengo Saiano) and runs direct sales offices in the United States (Sewickley, PA) and India (Pune), having cumulatively delivered over 10,000 transformers across Europe, North America, South America, Africa, the Middle East, Asia, and Oceania.

The product portfolio spans power applications (Generator Step-Up Transformers, auxiliary, transmission, autotransformers, shunt reactors, phase shifting transformers, HV/MV and MV/MV distribution transformers, mobile substations) and industrial applications (EAF, SAF, ESR, ladle furnace, and rectifier transformers, plus series/saturable/interphase reactors). Proprietary technology includes Green Transformers using natural or synthetic ester insulating liquids, a DGA fiber-optic 5-gas predictive monitoring system, and OLTC Vacutap on-load tap changers. The company has built the largest transformer ever produced in Italy (670 MVA for Ansaldo Energia).

Tamini generates revenue principally through project-based custom transformer sales, supplemented by a full lifecycle service portfolio covering installation, commissioning, after-sale assistance, repair and upgrading, emergency response, and rental/sale of reconditioned units drawn from its large installed fleet. Pricing is quote-based and project-specific. The go-to-market is enterprise field sales with direct engagement of TSOs, DSOs, utilities, and energy-intensive industrial customers (steel, metallurgy, aluminum, mining, nickel). The company is certified to ISO 9001, 14001, 45001, and 37001 standards.

Name

Tamini Transformers

Legal name

Tamini Trasformatori S.r.l.

Website

https://tamini.it

Company type

Private

Founded year

1916

Operating status

Operating

Headcount range

251–500 employees

Short description

Tamini Transformers is an Italian manufacturer, founded in 1916, of custom power and industrial transformers (GSU, furnace, rectifier, autotransformers, reactors) serving utilities, TSOs, and energy-intensive industries such as steel, metallurgy, and mining, with full lifecycle service and rental support.

Ownership category

akta.pro rank

Product category

Power Transformers

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Electrical Equipment, Appliance, and Component Manufacturing (335)

SIC

Power, Distribution & Specialty Transformers (3612), Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Transformers (Power, Distribution, Instrument, Specialty) (IMAGAAAA)

akta.pro secondary industries

Reactive Power & Power Quality Equipment (Capacitor Banks, Reactors, STATCOM/SVC, Harmonic Filters) (IMAGAAAG), Power Transformers, Reactors & Auxiliary Power Systems (EUADACAJ)

Keywords

• Power transformers
• Industrial transformers
• Furnace transformers
• Transformer manufacturing
• Transformer maintenance services

Headquarters

HQ city

Legnano

HQ country

Italy

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure

Revenue model

1. Transformer Sales: Custom transformer manufacturing and sales including power transformers (GSU, transmission, distribution), industrial transformers (furnace, rectifier, distribution), and reactors. Project-based sales with long sales cycles.
2. Service and Maintenance: Technical assistance, installation, commissioning, repair, upgrading, emergency services, and rental of transformers. Full lifecycle support for own products and third-party transformers.
3. Rental & Sale of Used Transformers: Rental and sale of used/reconditioned transformers from Tamini's large installed fleet. Second-life transformers for customers needing temporary or cost-effective solutions.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Tamini designs, manufactures, and services custom power and industrial transformers—including generator step-up units, transmission autotransformers, furnace and rectifier transformers, and reactors—for electricity transmission operators and energy-intensive industries worldwide. The company also provides installation, commissioning, maintenance, repair, upgrading, emergency response, and rental services across the transformer lifecycle.

Product overview

Tamini Transformers is a manufacturer of industrial and power transformers with over 100 years of experience (since 1916). The company offers a comprehensive portfolio organized into Power Applications (Generator Step-Up Transformers, Auxiliary Transformers, Transmission Transformers, Autotransformers, Shunt Reactors, Phase Shifting Transformers for generation, transmission, and distribution) and Industrial Applications (Furnace Transformers for EAF/SAF/ESR, Series Reactors, Rectifier Transformers, Ladle Furnace Transformers, and Distribution Transformers for metallurgy and heavy industry). The product portfolio includes both standard and custom-designed Green Transformers using natural/synthetic ester insulation. Beyond product manufacturing, Tamini provides full-service lifecycle support including Installation & Commissioning, After-Sale Assistance, Repair & Upgrading, Emergency Services, and Rental & Sale of reconditioned transformers. The company operates as part of the Terna Energy Solutions (TES) Group.

Differentiator

Problem solved

Functional benefit

Products and services

• Generator Step-Up Transformers (GSU) Transformer used to step up voltage from generator output level to transmission level. Designed for power generation utilities and independent power producers.
• Auxiliary Transformers Transformers supplying auxiliary power within power generation and substation installations. Built for power plant operators and substation operators.
• Transmission Transformers High-voltage transformers used within transmission substations to interconnect different voltage levels of the grid. Designed for transmission system operators and utilities.
• Transmission Autotransformers Autotransformers for transmission grid interconnection at the highest voltage levels. Supplied to transmission system operators for grid efficiency.
• Shunt Reactors Reactors used to compensate for capacitive reactive power in long high-voltage transmission lines. Built for grid operators and transmission utilities.
• Phase Shifting Transformers (PST) Transformers that control the phase angle between two circuits to manage power flow across transmission networks. Supplied to transmission system operators.
• HV/MV Transformers Transformers that interface high-voltage transmission systems with medium-voltage distribution networks. Used by utilities and large industrial customers.
• MV/MV Distribution Transformers Transformers for distribution-level voltage adaptation between medium-voltage levels. Designed for distribution utilities and industrial customers.
• Mobile Substation Transformers Transportable transformer units for emergency grid support, temporary power supply, and maintenance bypass. Supplied to utilities and large industrial operators.
• EAF Transformers (Electric Arc Furnace) High-current transformers designed to power electric arc furnaces used in steelmaking and ferro-alloy production. Supplied to steel plants and metal refineries.
• SAF Transformers (Submerged Arc Furnace) Transformers powering submerged arc furnaces used in the production of ferromanganese, silicomanganese, and other alloys. Built for metal-alloy producers.
• ESR Transformers (Electro-Slag Remelting) Transformers for electro-slag remelting furnaces used in specialty steel and superalloy refining. Supplied to specialty metallurgy operations.
• LF Transformers (Ladle Furnace) Transformers for ladle furnaces used in secondary steel refining for temperature and composition adjustment. Designed for steelworks and foundries.
• Rectifier Transformers Transformers for AC-to-DC conversion processes, supporting electrolysis, electroplating, and aluminum smelting applications. Supplied to chemical, metallurgical, and smelting operations.
• Series Reactors Reactors connected in series with furnace circuits to stabilize electric arcs and limit short-circuit currents. Used with arc furnace installations.
• Regulating Transformers/Autotransformers Transformers and autotransformers designed to regulate voltage and operating parameters in industrial process power systems. Sold with rectifier and furnace installations.
• Saturable Reactors DC-controlled reactors for continuous voltage/current control in industrial electrical systems. Used together with rectifier transformers for fine-tuned process control.
• Interphase Transformers Transformers that provide phase balancing between two parallel rectifier bridges in DC power supply systems. Used in high-current DC industrial applications.
• Green Transformers Transformers that use natural or synthetic ester insulation fluid instead of mineral oil, delivering higher fire safety, biodegradability, and reduced environmental impact. Offered as a sustainable option across the power and industrial transformer portfolio.
• Installation and Commissioning Services On-site installation and commissioning of new power and industrial transformers for utilities and industrial customers. Includes testing and energization.
• After-Sale Assistance Services Scheduled after-sale technical support, maintenance, and spare-parts services for installed Tamini transformer fleets. Provided to utilities and industrial operators.
• Repair and Upgrading Services Repair, retrofitting, and modernization services for existing Tamini transformers, including upgrades like the US Steel retrofill project. Aimed at customers needing to extend the life or capacity of installed transformers.
• Emergency Services Rapid-response emergency field service for transformer failures and unplanned outages, providing diagnostics and on-site intervention for utility and industrial customers.
• Rental and Sale of Transformers Rental and short-term sale of transformers for temporary power, project bridging, or emergency grid support. Used by utilities and industrial operators during planned or unplanned outages.

Quantifiable outcome

• 670 MVA transformer - largest ever built in Italy
• +2 more outcomes

Named customers9 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered core.

• Terna Energy Solutions (TES Group)coreOthersTamini is a subsidiary of Terna Energy Solutions (TES) Group, which offers technological, sustainable and competitive solutions for the design, implementation and maintenance of complex, sustainable and increasingly digital energy systems. TES Group provides the commercial and operational excellence and synergies that position Tamini as a reference partner in the energy transition.
• Brugg CablescoreOthersPart of TES Group. Brugg Cables designs, manufactures, installs and maintains cables, accessories and system solutions for energy suppliers, TSOs and industrial applications. Group companies have diverse skills enabling comprehensive support for entire project lifecycles.
• AlteniacoreOthersPart of TES Group. Altenia provides advanced solutions and comprehensive support tailored to each phase of the life cycle of high and medium voltage infrastructure, photovoltaic systems and storage systems.

Scale indicators12 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• Siemens Energy: Major manufacturer of large power transformers, including GSU and transmission units, with a strong European industrial customer base — overlapping with Tamini's core power-transformer product portfolio and project-based delivery model.
• Hyundai Electric: Korean manufacturer of power transformers, switchgear, and rotating machinery with global utility and industrial customers — comparable to Tamini in large power transformer engineering and international project execution.
• GE Vernova: Grid Solutions business manufactures power and industrial transformers, including large GSU and specialty units — a direct competitor for utility-scale transformer projects and energy-intensive industrial applications.
• Hitachi Energy: World's largest transformer manufacturer (formerly ABB Power Grids), producing power, distribution, and specialty transformers, plus shunt reactors and transformer monitoring — directly comparable across both utility and industrial transformer segments served by Tamini.
• Trench Group: Specialist manufacturer of instrument transformers, coils, and shunt reactors for power transmission, now part of Siemens Energy — overlapping with Tamini's reactor and specialty transformer product lines.
• WEG Industries: Brazilian-headquartered manufacturer of transformers, generators, and industrial electrical equipment with global presence — comparable to Tamini on power and distribution transformers, particularly in emerging-market and industrial customer segments.
• Elsewedy Electric: Middle East/Africa-based transformer and power solutions manufacturer serving utilities and industrial customers — directly comparable on transformer manufacturing, regional diversification, and energy-intensive industry focus.
• CG Power and Industrial Solutions: Indian-headquartered global manufacturer of power and distribution transformers serving utilities and industrial customers — a comparable peer given Tamini's Indian subsidiary footprint and shared emphasis on emerging-market project delivery.

Broad incumbents

• Toshiba Energy Systems & Solutions: Manufactures large power transformers and grid equipment as part of a wider energy systems portfolio — comparable on transformer technology and utility-scale projects, though operating across a broader scope than Tamini.
• Schneider Electric: Global incumbent in electrical distribution, industrial automation, and energy management — broader portfolio than Tamini but overlapping on MV/LV distribution transformers and grid-side solutions for utilities and industrial customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/playlist?app=desktop&list=PLex5XzkYsce-DQdIUy0tshNeXC6fdTfsK
• LinkedInlinkedin.com/company/tamini-trasformatori

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Tamini Transformers