EPRO Gallspach

What EPRO Gallspach does

EPRO Gallspach GmbH designs and manufactures high-precision measurement technology and test bay equipment for high voltage and current applications from its single site in Gallspach, Upper Austria. The company traces its origins to a 1957 Austrian subsidiary of Germany's Messwandlerbau GmbH and was re-established as an independent entity through a management buyout on October 17, 1994; it has been wholly family-owned since June 2014 and employs approximately 35 people. EPRO serves transformer manufacturers, cable system providers, insulation material producers, national metrology institutes, and electric utilities across more than 40 countries, with named customers including Siemens, Hitachi/ABB, Mitsubishi, GE, Prysmian, Nexans, Isovolta, and PTB Germany.

Name

EPRO Gallspach

Legal name

EPRO Gallspach GmbH

Website

https://epro.at

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

11–50 employees

Short description

EPRO Gallspach GmbH is a family-owned Austrian manufacturer of high-precision measurement technology and test bay equipment for high voltage applications, serving transformer, cable, insulation, and metrology customers across 40+ countries.

Ownership category

akta.pro rank

Product category

High Voltage Measurement and Testing Equipment

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Testing Laboratories and Services (54138)

SIC

Power, Distribution & Specialty Transformers (3612), Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Electronic Coils, Transformers & Other Inductors (3677)

akta.pro primary industry

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

akta.pro secondary industries

Testing, Commissioning & Energization Services (HV) (EUAEABAI), Rotating Equipment Start-up & Performance Testing (EUAEAJAE)

Keywords

• High voltage transformers
• Instrument transformer testing
• Measurement systems
• Calibration services
• Cast resin insulators

Headquarters

HQ city

Gallspach

HQ country

Austria

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom HV Transformers and Testing Equipment: Design, development and manufacturing of customized high voltage transformers, standard voltage/current transformers, and test transformers tailored to customer specifications. Products include test transformers (20 kV to 600 kV), standard voltage transformers (up to 800/√3 kV), standard current transformers (up to 50 kA), and high current transformers. Majority of products are manufactured according to customer specifications.
2. Measurement Systems: Fully automated measurement and test systems for transformers and solid insulation materials including TRAFO TEST Premium, TRAFO TEST Compact, TRAFO TEST Coil, INSULATION TEST Premium, INSULATION TEST Tan Delta, INSULATION TEST Endurance, and universal measurement devices. Customized solutions developed in close cooperation with manufacturers and experts.
3. Calibration Services: Accredited calibration laboratory for current and voltage transformers (accuracy measurement) according to ISO/IEC 17025. Calibration completed within 5 working days guaranteed. Certificates internationally recognized through ILAC MRA.
4. Cast Resin Products: Customized epoxy resin insulators for HV applications produced in-house vacuum casting facility. Main products include cable end plugs, insulators, insulator rings and muffles for voltage levels from 72.5 kV to 500 kV. Also offers small batches using manual casting.
5. Tap Changers: Production of specialized tap changers (1- to 3-pole, 100-4000 Amperes) taken over from Sandner Schalt- und Systemtechnik GmbH for dry-type transformers. Also serves power regulation in parallel operation of large power transformers and voltage regulation in welding transformers.
6. Feed-in Transformers and Audio Frequency Suppressors: Audio frequency feed-in transformers for ripple control systems in medium voltage applications with lifetimes of 30 years and more. Serial and parallel versions for indoor and outdoor use.
7. Ringkernstromwandler (Toroidal Core Current Transformers): Customized toroidal core current transformers produced 100% in Austria for metering and protection purposes, designed according to customer specifications. Types include JR (common outdoor/indoor) and JRG (outdoor in aluminum housing with cast resin).

Pricing tiers

Go-to-market motion3 records

Distribution channels2 records

Marketing channels7 records

Core offering

EPRO Gallspach designs and manufactures high-precision measurement and testing equipment for high voltage/current applications, including test transformers, standard voltage and current transformers, and fully automated TRAFO TEST and INSULATION TEST measurement systems. It also operates an ISO/IEC 17025 accredited calibration laboratory and produces cast resin insulators, feed-in transformers, toroidal core current transformers, and tap changers, mostly custom-manufactured to customer specifications.

Product overview

EPRO Gallspach GmbH is a family-owned Austrian company (founded 1957, MBO 1994) that designs and manufactures high-precision measurement technology and testing equipment for high voltage/current applications. The product portfolio is organized around several core product families: (1) HV Transformers and Test Bay Equipment — comprising test transformers in standard, cascade, and dry-insulated executions (20 kV to 500 kV), standard voltage transformers (1 kV to 800/√3 kV), standard current transformers (1 A to 50 kA), grid transformers for touch-safe self-supply, and high current transformers; (2) Measurement Systems — the TRAFO TEST series (Premium, Compact, Coil) for fully automated transformer testing, and the INSULATION TEST series (Premium, Tan Delta, Endurance, Easy TD) for insulation material testing; (3) Feed-in Transformers and Audio Frequency Suppressors for ripple control systems; (4) Toroidal Core Current Transformers; (5) Tap Changers; (6) Cast Resin Products (cable end plugs, insulators, muffles); and (7) ISO/IEC 17025 accredited Calibration Services. Products are custom-manufactured to customer specifications, with strong emphasis on high accuracy, long service life (up to 30+ years), and are produced entirely at the headquarters in Gallspach, Austria.

Differentiator

Problem solved

Functional benefit

Brands

• TRAFO TEST: Fully automated measurement and test systems for transformers, available in Premium, Compact, and Coil versions.
• INSULATION TEST
• Toroidal Core Current Transformers (JR, JRG types)
• Feed-in Transformers (FET, ET, FGS, KT, FKT)

Products and services

• Test Transformers (Standard Execution) Oil-insulated step-up transformers used for generating high voltage in test laboratories. Available in standard execution models from 50 kV to 250 kV with continuous output from 5 kVA to 50 kVA.
• Test Transformers (Cascade Execution) Cascade-design test transformers enabling generation of very high voltages up to 500 kV. Models include HVOT 200/10KS, HVOT 300/20KS, HVOT 500/25KS, and HVOT 500/30 KS.
• Test Transformers (Dry Insulated) Dry-type test transformers for lower voltage applications up to 30 kV. Lightweight and environmentally friendly devices free from oil, with continuous output of 5 kVA.
• Standard Voltage Transformers High-accuracy testing devices used as measurement standards for calibrating instrument transformers. Available from 1 kV up to 800/√3 kV in single-pole, double-pole, and cascade executions.
• Standard Current Transformers High-precision current transformers used as measurement standards for accuracy measurement and calibration. Available in dry-insulated (1.1 kV) and oil-insulated (30 kV to 200 kV) versions with primary current ratings from 1 A to 50,000 A.
• Grid Transformers (Touch-Safe Self-Supply) Touch-safe, compact transformers enabling easy implementation of a 230 V supply from medium voltage grids in switching stations of wind, PV, or hybrid parks. Types HVOTT 24/5 (20 kV to 230 V) and HVOTT 36/5 (33 kV to 230 V), both with 5 kVA rating.
• High Current Transformers Specialized transformers for generating high output currents at low secondary voltages. The HCDT series includes models from 2000 A to 10,000 A with segmented secondary windings.
• TRAFO TEST Premium The most technically advanced version of EPRO's transformer testing systems, primarily developed for testing power transformers. Features two large monitors, full third-party device integration, and is suitable for scientific applications, R&D, and shunt reactor testing.
• TRAFO TEST Compact A small and economical solution primarily developed for testing distribution transformers. Compact, cost-effective design with one monitor, integrating power source, reference transformers, and operator interface in a single mobile system.
• TRAFO TEST Coil Customized measurement system for pre-testing transformer coils after finishing of the casting process. Uses induced overvoltage test at 400 Hz including partial discharge testing to reduce failure rate in end testing.
• INSULATION TEST Premium Fully automated, customized system for material testing, covering all needs for testing insulation materials used in electrical machines. Includes Capacitance, Tan Delta measurement, and breakdown voltage testing for R&D and quality control.
• INSULATION TEST Tan Delta (ITTD) Device for standardized testing of dissipation factor (Tan Delta) and Capacitance of solid insulation materials under controlled temperature and pressure conditions, in accordance with DIN/IEC 62631-3-1:2016 and ASTM D150-18.
• INSULATION TEST Endurance Accelerated aging test system for insulation materials using high frequency excitation up to 1000 Hz, increasing the aging speed by a factor of 20 compared to conventional 50 Hz aging. Measures time to dielectric breakdown.
• INSULATION TEST Easy TD Universal Tan Delta and Capacitance measuring device for various objects including stators, motors, cables, capacitors, and semi-finished or finished products. Features plug & play measurement with automated reporting.
• Audio Frequency Feed-in Transformers Transformers linking ripple control transmitters to power grids for overlaying audio frequency signals, used for tariff switching (day/night power tariffs) in smart grid applications. Available in serial (FET, ET, FGS) and parallel (KT, FKT) versions for indoor and outdoor use.
• Audio Frequency Suppressors Devices preventing unwanted spread of interference frequencies in ripple control systems from medium-voltage grid branches. Creates galvanic isolation between medium-voltage network and blocking circuit using medium-voltage transformers with shunt and capacitor units, with service life up to 30 years or more.
• Toroidal Core Current Transformers Custom-calculated and produced transformers for metering and protection purposes, designed for installation on power transformer bushings. Types include JR (standard indoor/outdoor) and JRG (outdoor in aluminum housing with cast resin). Production 100% in Austria.
• Tap Changers Specialized tap changers taken over from Sandner Schalt- und Systemtechnik GmbH. Available in 1- to 3-pole versions with manual or motor drive (100-4000 Amperes), for use in dry-type transformers to compensate voltage fluctuations.
• Cast Resin Products (Cable End Plugs, Insulators, Muffles) Customized epoxy resin insulators for HV applications produced using an in-house vacuum casting facility. Products include cable end plugs, insulators, insulator rings, and muffles for voltage levels from 72.5 kV to 500 kV.
• Calibration Services Accredited calibration laboratory for current and voltage transformers (accuracy measurement) according to ISO/IEC 17025 since 2010. Calibration certificates are internationally recognized through ILAC MRA, traceable to BEV Austria and PTB Germany, with completion guaranteed within 5 working days.
• NVOS 30bc Standard Voltage Transformer Further development of the standard voltage transformer NVOS 30, using a dual core (bi-core) concept with a smaller voltage error value and a nearly linear error curve over the whole voltage measuring range.
• 1000 Hz Test Transformer Dry insulated test transformer developed during the Endurance test system development for insulation materials, rated 1000 Hz, 20 kV and 5 kVA, compared to other EPRO transformers up to 400 Hz.
• 250 kV Test Transformer (Single-Stage) Test transformer for 250 kV with 25 kVA (continuous) and 50 kVA (short time use), formerly built in cascade execution, now also available in standard single-stage execution with a compact design for laboratories with lower ceiling height.
• NVOD 10bc Reference Voltage Transformer A special 2-stage version of the standard voltage transformer (Type NVOD 10bc) developed as a new reference standard for PTB Germany, one of the world's leading metrology institutes.

Quantifiable outcome

• Calibration completed within 5 working days guaranteed vs longer wait times at governmental organizations
• +2 more outcomes

Named customers9 records

Segments6 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Twelve partnerships are on record, tiered regional and core.

• CESINEL (Spain)regionalChannel Partner/ Reseller/ Distributor · 1 January 2025New distributor for Spain. CESINEL (Protecciones CESINEL) located in Madrid, Spain. Mr. Ricardo Granizo as contact.
• ISOVOLTA AGcoreStrategic or Co-development PartnerLong-term partnership and friendship with internationally known manufacturer of insulating materials. This partnership was a major driver of development activities for devices in the field of insulation material testing. Isovolta's labs, especially at main production site in Werndorf, use INSULATION TEST Premium, several ITTD machines, and INSULATION TEST Endurance system daily.
• ZERAcoreStrategic or Co-development PartnerBoth companies have decades of experience in instrument transformer testing operating in a niche market. Collaboration results in outstanding quality and accuracy in complete systems for instrument transformer testing. ZERA provides highest quality measuring bridges and burdens while EPRO supports with HV/current transformers and standard transformers. Result: world's most accurate and sophisticated test systems for instrument transformers.
• Physikalisch-Technische Bundesanstalt (PTB) GermanycoreStrategic or Co-development PartnerPTB is world's most important metrology institute for traceability, calibrations, and special tests. EPRO maintains lively exchange with PTB for decades. EPRO can offer customers PTB calibration as alternative to accredited laboratory calibration. PTB also uses EPRO devices as reference especially in voltage range.
• Smart Vision Electrical & Electronics Devices (UAE)regionalChannel Partner/ Reseller/ DistributorDistributor for Middle East region including UAE, Saudi Arabia, Qatar, Oman, Bahrain, Kuwait. Located in Abu Dhabi, UAE.
• Next Gen Equipments P. Ltd. (India)regionalChannel Partner/ Reseller/ DistributorLong-time representative for Indian region, invited EPRO to ELECRAMA trade show in India. Located in Vadodara, Gujarat, India.
• Oceantec Ltda. (Brazil)regionalChannel Partner/ Reseller/ DistributorDistributor for Brazil region. Located in Santo André, São Paulo, Brazil.
• EN-Centrum s.r.o. (Czech Republic/Slovakia)regionalChannel Partner/ Reseller/ DistributorPetr Vitner from EN-Centrum now represents EPRO in Czech Republic and Slovakia since 2025. Located in Prague, Czech Republic.
• RedPhase Instruments Australia Pty. Ltd. & RedPhase Pte Ltd (Australia/Southeast Asia)regionalChannel Partner/ Reseller/ DistributorNew distributor representing EPRO in Australia, New Zealand, Singapore, Malaysia, Indonesia, Philippines, Brunei, Myanmar, Laos, Cambodia, Papua New Guinea, East Timor. Located in Nunawading, Victoria, Australia and Singapore.
• CETT - Equipment and Technology Transfer Company (Vietnam)regionalChannel Partner/ Reseller/ DistributorDistributor for Vietnam region. Located in Hanoi, Vietnam. Mr. Le Ba Thanh as contact.
• GTM Weidmann Co. Ltd. (Japan)regionalChannel Partner/ Reseller/ DistributorDistributor for Japan. Located in Tokyo, Japan. Mr. Ichisei Goto as contact.
• Testnordic AB (Sweden)regionalChannel Partner/ Reseller/ DistributorDistributor for Nordic region including Sweden. Located in Stockholm, Sweden.

Scale indicators7 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• OMICRON electronics: Austrian-based global vendor of primary and secondary test equipment for power transformers, instrument transformers, and protection systems. Closely comparable to EPRO as a European specialist serving the same transformer-manufacturer and utility customers, though at significantly larger scale and broader portfolio.
• KWS Electronic: German specialist in power quality, transformer testing, and HV measurement equipment. Directly comparable to EPRO's measurement-systems business in the European transformer and utility testing market.
• Megger: UK-headquartered global supplier of electrical test and measurement equipment, including transformer turns ratio, winding resistance, and HV insulation testers. Directly comparable to EPRO in instrument transformer and HV insulation testing, but with a much broader catalog and global service network.
• Doble Engineering: US-based provider of diagnostic testing and monitoring solutions for transformers and other HV assets, including the F6000 series. Comparable to EPRO's TRAFO TEST and INSULATION TEST families as a transformer-focused test-system vendor serving utilities and OEMs.
• Haefely (Pfiffner Group): Swiss manufacturer of HV test systems, including resonant test sets and impulse generators. Overlaps with EPRO's HV transformer and test-bay equipment offering and serves similar utility and transformer-manufacturer customers worldwide.
• ZERA GmbH: German manufacturer of high-precision measuring bridges and burdens for instrument transformer testing. Strategic co-development partner of EPRO in the same niche; comparable as a direct peer in instrument transformer calibration test systems.
• Tettex (Hubbell / Thomas Industrial): Swiss-origin specialist in HV measurement, including standard voltage and current transformers and high-precision HV measuring bridges. Highly comparable to EPRO's standard transformers and calibration laboratory offering for instrument transformer testing.
• HV TECHNOLOGIES: US/China-based provider of HV test equipment and measurement instruments, including partial discharge and insulation diagnostics. Comparable to EPRO's HV test bay and insulation measurement offerings for industrial and utility customers.
• Raytech Switzerland: Swiss manufacturer of winding resistance meters and transformer turns ratio testers, named by EPRO as a recommended partner. Comparable niche peer in transformer testing instrumentation with overlapping OEM and service customers.

Emerging players

• Elettrotest: Italian specialist in electronic power sources used as the power-source component in EPRO's TRAFO TEST systems. Comparable as a niche supplier serving the same transformer test-bay integrators and OEMs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/eprogmbh
• YouTubeyoutube.com/channel/UCd8IQ6UYU6vb4-aQ7kwvzLw
• Facebookfacebook.com/epro.at
• LinkedInlinkedin.com/company/epro-gallspach-gmbh

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 EPRO Gallspach