What Transformadores União does

Transformadores União Ind. Com Ltda is a privately held Brazilian manufacturer of medium and low voltage transformers headquartered and operating from a single facility in the Parque São Lourenço district of São Paulo. The company's core offering is the DRY series of dry-type transformers — including the Dry Plus, Dry Tech, Dry Solar, Dry Utilities, and Dry Solar BT lines — distinguished by vacuum-encapsulated coils in epoxy resin that eliminate flammable liquid insulation. It also produces liquid-immersed distribution and power transformers up to 3 MVA using mineral oil or biodegradable vegetable oil, plus a portfolio of specialized services (extended warranty up to 60 months, start-up/energization, commissioning, ABNT-compliant laboratory testing, retrofit, reform, and rental) covering both its own and competitor brands.

The company sells via a direct, sales-led motion targeting industrial, utility, infrastructure, and commercial buyers in Brazil, with quote-based custom pricing and no public e-commerce. Its customer base includes enterprise names such as ArcelorMittal, Thyssenkrup, Vale, Klabin, Cemig, Eletrobrás, Sabesp, Claro, Vivo, Eldorado Brasil, Shopping Cidade Jardim, and CDB, spanning steel, mining, pulp and paper, electric power generation, water/sanitation, telecommunications, and real estate. The company is ISO 9001 certified, ABNT NBR 5356/11 compliant, and CRCC homologated, with an in-house ABNT-certified laboratory performing routine testing. No funding rounds, subsidiaries, M&A activity, or public-company status have been disclosed; the firm appears independently and privately owned.

The business model combines one-time hardware sales (transformers specified and quoted per customer) with a recurring service and aftermarket layer (extended warranty, retrofit, reform, rental, and laboratory testing). Vertical segmentation is the primary go-to-market approach, with active expansion into data centers, solar PV generation, and EV-charging-ready residential/commercial buildings as growth vectors. Marketing is primarily content-driven via a multilingual (Portuguese, English, Spanish) website, an educational blog, customer testimonials, and selective participation in industry events such as Intersolar Summit Brazil Nordeste.

Name

Transformadores União

Legal name

Transformadores União Ind. Com Ltda

Website

https://transformadoresuniao.com.br

Company type

Private

Founded year

1992

Operating status

Operating

Headcount range

101–250 employees

Short description

Transformadores União is a privately held São Paulo-based manufacturer of dry-type medium voltage and liquid-immersed transformers up to 3 MVA, serving Brazilian industrial, utility, infrastructure, and commercial customers with custom-specified equipment plus commissioning, retrofit, rental, and warranty services.

Ownership category

akta.pro rank

Product category

Power Transformers / Electrical Equipment Manufacturing

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Power, Distribution & Specialty Transformers (3612)

akta.pro primary industry

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

akta.pro secondary industries

Transformer & Reactor Refurbishment / Replacement Programs (EUAEALAE), High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA), Commissioning, Testing & Energization Services (Pre-Commissioning, Grid Code Compliance) (EUAMAFAK)

Keywords

• Dry-type transformers
• Medium voltage transformers
• Liquid-immersed transformers
• Power distribution equipment
• Electrical transformer manufacturing

Headquarters

HQ city

São Paulo

HQ country

Brazil

HQ region

Latin America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Dry-Type Transformer Sales: Sale of medium and low voltage dry-type transformers (DRY: Plus, Tech, Solar, BT, Utilities series) as manufactured equipment. One-time purchase of equipment with associated services such as commissioning, startup, and extended warranty.
2. Liquid-Immersed Transformer Sales: Sale of medium voltage liquid-immersed transformers (up to 3 MVA) using mineral oil or biodegradable vegetable oil insulation.
3. Specialized Services: Revenue from specialized services including Extended Warranty (up to 60 months), Start-Up/Energization, Commissioning, Laboratory Tests (ABNT-compliant), Retrofit, and Reform services for own-brand and competitor transformers.
4. Transformer Rental: Rental of transformers as an alternative procurement model for customers needing temporary or project-based power solutions.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

Transformadores União manufactures and sells dry-type medium and low voltage transformers (DRY series: Plus, Tech, Solar, BT, Utilities) with vacuum-encapsulated epoxy resin coils, as well as liquid-immersed distribution and power transformers (mineral oil or biodegradable vegetable oil, up to 3 MVA). The company complements its equipment sales with a full specialized services offering including extended warranty (up to 60 months), start-up/energization, commissioning, ABNT-compliant laboratory tests, retrofit, reform/repair for own and competitor brands, and transformer rental.

Product overview

Transformadores União is a specialized manufacturer of electrical transformers offering a portfolio of medium and low voltage products. Its core product lines include the DRY series of dry-type transformers (Dry Plus, Dry Solar, Dry Utilities, and Dry Solar BT) featuring vacuum-encapsulated coils in epoxy resin, as well as liquid-immersed transformers using mineral or biodegradable vegetable oil up to 3 MVA. The product range spans from IP 00 open-frame units to fully enclosed models up to IP 54. Complementing the product portfolio are specialized services including transformer rental, extended warranties of up to 60 months, start-up and commissioning, in-house laboratory testing per ABNT NBR 5356, retrofit modernization, and repair/reform services for transformers of various brands.

Differentiator

Problem solved

Functional benefit

Products and services

• Dry Plus IP 00 (Medium Voltage Dry-Type Transformer) Medium voltage dry-type transformer with vacuum-encapsulated epoxy resin coils and IP 00 protection rating (no enclosure), designed for industrial applications requiring robust power distribution.
• Dry Plus IP 21 to IP 54 (Medium Voltage Dry-Type Transformer) Medium voltage dry-type transformer with vacuum-encapsulated epoxy resin coils and IP 21 to IP 54 ingress protection ratings, suitable for environments requiring higher protection against dust and water.
• Dry Solar (Medium Voltage Dry-Type Transformer) Medium voltage dry-type transformer specifically designed for solar photovoltaic applications, with vacuum-encapsulated epoxy resin coils for reliable performance in renewable energy environments.
• Dry Utilities (Medium Voltage Dry-Type Transformer) Medium voltage dry-type transformer designed for utility applications, with vacuum-encapsulated epoxy resin coils for power distribution networks.
• Dry Solar BT (Low Voltage Dry-Type Transformer) Low voltage dry-type transformer optimized for solar photovoltaic installations, providing efficient voltage step-up or step-down for distributed energy generation systems.
• Low Voltage Transformer (Transformador Baixa Tensão) Low voltage isolating transformers and autotransformers — step-up or step-down units designed for distribution systems, lighting networks, control panels, motors, machinery, furnaces, and other industrial applications.
• Medium Voltage Liquid-Immersed Transformer Distribution and power transformers immersed in mineral oil or biodegradable vegetable oil, with ratings up to 3 MVA, for medium voltage applications.
• Extended Warranty (Garantia Complementar) Extension of the initial warranty period, contractable for up to 60 months, including maintenance for manufacturing defects covering labor and parts costs for transformer repair.
• Transformer Rental (Locação de Transformadores) Rental service providing temporary power solutions for facilities requiring transformers for short-term or interim needs.
• Start-Up Service Energization of the transformer at the customer's facility, including demonstration of operation and maintenance procedures.
• Commissioning (Comissionamento) Integrated application of technical standards and engineering procedures to inspect and test transformers, applicable to new equipment, existing systems, or modernization and expansion projects.
• Laboratory Tests (Ensaios em Laboratório) Laboratory testing services validating routine tests on medium and low voltage transformers in accordance with ABNT NBR 5356 standards, using modern calibrated equipment in the company's in-house ABNT-certified laboratory.
• Retrofit Modernization of transformers by replacing old or inadequate elements with modern, high-quality parts while conserving the original structure; performed by a qualified team with state-of-the-art facilities for equipment from other manufacturers.
• Reform (Reforma) Repair service for medium and low voltage dry-type transformers of different brands; after repair, transformers undergo tests in accordance with ABNT standards to ensure maximum quality.

Quantifiable outcome

• Up to 60-month extended warranty available covering manufacturing defects, labor, and parts.
• +2 more outcomes

Named customers12 records

Segments7 records

Ideal customer profiles7 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Siemens: Global electrical equipment major with GEAFOL cast-resin dry-type transformers and oil-immersed units; competes across the same industrial, infrastructure and utility customer segments in Brazil.
• Schneider Electric: Global major with a transformer business serving data centers, utilities and industry; competes via Trihal dry-type cast-resin units that overlap directly with Uni\u00e3o's DRY Plus product family in Brazil and across Latin America.
• Eaton: Global electrical power management major offering dry-type and oil-filled distribution transformers; competes for data center, industrial and commercial projects in Latin America.
• ABB: Global industrial player offering distribution and dry-type transformers; competes across industrial, utility and infrastructure segments in Brazil even after the power-grids spin-off into Hitachi Energy.
• Toshiba Energy Systems & Solutions: Manufactures power and distribution transformers globally including cast-resin dry-type units; competes for utility and large industrial orders in Latin America.
• GE Vernova: Spun off from GE, the power equipment business includes large and medium power transformers; competes in utility and heavy industrial segments in Brazil.
• Hitachi Energy: Global leader in transformers (formerly ABB Power Grids); supplies oil-immersed and dry-type units including the dry-type and pad-mount portfolio that competes for the same utility, industrial and data center customers in Brazil.

Emerging players

• Hubbell: Offers distribution transformers including dry-type and pad-mount through its Electrical Solutions segment; an adjacent player rather than direct BR market leader, but overlapping customer profile in utility and industrial segments.

Direct peers

• WEG: Brazilian industrial group with a large transformers portfolio spanning dry-type and oil-immersed units; directly overlaps with Uni\u00e3o's medium voltage dry-type and liquid-immersed offerings and competes head-to-head in Brazilian industrial and utility tenders.
• Romagnole: Brazilian transformer manufacturer with both dry-type and oil-immersed medium voltage units; directly comparable in size, product mix and domestic Brazilian customer base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/TransformadoresUniao

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

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 Transformadores União