Efficiency and precision in electrical measurement

Promoting quality in the electrical infrastructure with safe and reliable data.

FÖHR specializes in high-performance electrical testing equipment for medium and high-voltage systems, helping utilities, electrical contractors, industrial facilities, renewable energy operators, and testing laboratories improve reliability, safety, and predictive maintenance.

Our portfolio includes advanced diagnostic instruments for transformers, switchgear, electrical substations, underground cable systems, grounding networks, and power quality analysis. Designed for demanding industrial environments, FÖHR testing solutions combine precision, durability, and compliance with international electrical standards.

At FÖHR, we understand that electrical failures in power systems can result in costly downtime, safety risks, and operational interruptions. For this reason, our equipment is designed to support preventive, predictive, and commissioning testing programs in power generation, transmission, and distribution systems.

High Voltage Testing Solutions for Electrical Infrastructure

Medium and high-voltage cable VLF testing
Electrical insulation testing
Tan Delta and power factor analysis
Transformer winding resistance measurements
Transformer Turns Ratio (TTR) testing
SFRA sweep frequency response analysis
Circuit breaker and switchgear diagnostics
Power quality analysis and harmonic measurements
Ground resistance and earthing systems verification
Transformer oil dielectric strength testing
Battery bank diagnostics and reliability testing

We support a wide range of work sectors in the energy industry

Affordability in Processes

High accuracy electrical measurements

Rugged industrial-grade construction

Advanced transformer diagnostic solutions

International quality standards

Reliable performance for substations and industrial environments

Technical support and worldwide distribution

FÖHR is committed to helping electrical professionals improve system reliability through advanced testing technologies for power systems and electrical infrastructure.

Electrical Testing Equipment Built for Reliability

FÖHR products are engineered to deliver accurate measurements under demanding field conditions. Whether you need a VLF hipot tester for medium-voltage cables, a transformer turns ratio tester, a winding resistance tester, or a three-phase power quality analyzer, our equipment is designed to support engineers and technicians with dependable diagnostics.

We focus on solutions that help maintenance teams detect insulation degradation, transformer winding issues, harmonic distortion, voltage imbalance, cable failures, grounding problems, and other electrical abnormalities before they become critical failures.

FÖHR solutions

Explore our innovative high-voltage electrical measuring equipment.

Electrical Power & Transformer Testing Systems

Testing, diagnostics, and maintenance of electrical systems, transformers, substations, and grounding networks — from insulation analysis to high-voltage testing and protection verification.

• Power generation and distribution companies
• Transformer manufacturers and service centers • Substation maintenance and testing teams
• Industrial electrical contractors
• Utilities and calibration laboratories

Transformer Oil Laboratory & Quality Analysis Systems
Testing and control of dielectric oils, insulating materials, and laboratory parameters according to ASTM and IEC standards — ensuring transformer fluid reliability and system insulation performance.

• Transformer oil laboratories
• Petrochemical and energy industries • QA/QC departments
• Industrial maintenance laboratories • Electrical testing centers

FÖHR outstanding equipments

FÖHR Transformer Turns Ratio Testers are designed for accurate transformer diagnostics, commissioning, and preventive maintenance of power transformers, distribution transformers, and instrument transformers.

Tan Delta Test Equipment for Cable & Transformer Insulation Analysis

Advanced Transformer Oil Dielectric Testing Equipment for Power Utilities & Electrical Maintenance

FÖHR VLF Hipot Testers are designed for insulation diagnostics, acceptance testing, and preventive maintenance of medium-voltage power cables.

Customer Reviews

Find out what our customers say about our measurement equipment.

The quality of FÖHR equipment has exceeded our expectations in electrical measurements. Without a doubt, I would recommend them to other companies in the sector.