Medium- and High-Voltage Testing

Testing and Validation for Medium- and High-Voltage Transmission and Distribution Equipment

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Medium- and High-Voltage Testing

Independent Testing, Validation, and Certification Support for Medium- and High-Voltage Equipment used in Power Transmission, Distribution, and Industrial Applications

Medium- and high-voltage equipment must perform reliably under normal operating conditions as well as during electrical faults, switching events, and environmental stress.
Manufacturers, utilities, and grid operators need testing capabilities that cover insulation performance, short-circuit withstand, arcing behavior, switching performance, temperature rise, mechanical operation, and environmental durability.
DEKRA provides testing, validation, and certification support for medium- and high-voltage equipment used in power transmission, distribution, renewable energy, and industrial applications. Our global laboratory network supports product development, qualification, certification, and acceptance processes.

How DEKRA Supports Medium- and High-Voltage Equipment Projects

DEKRA supports manufacturers, utilities, grid operators, and other stakeholders with testing programs tailored to the equipment, applicable standards, and requirements.
Our services can support:
  • development and pre-compliance testing
  • type and qualification testing
  • testing according to applicable standards and requirements
  • support for certification and acceptance processes
By covering electrical, thermal, environmental, and mechanical performance, DEKRA testing provides technical evidence to support equipment development, qualification, and reliable operation.

Medium- and High-Voltage Testing Capabilities

DEKRA evaluates equipment performance under normal operating conditions, electrical faults, switching events, environmental exposure, and mechanical stress. Testing programs are defined according to the equipment, applicable standards, and project requirements.

Equipment and Systems DEKRA Tests

DEKRA provides testing and validation for a broad range of equipment used in transmission and distribution networks, renewable energy systems, and industrial power applications. This scope includes the equipment listed below.
Equipment Scope:
  • power and distribution transformers, and reactors
  • instrument transformers
  • medium- and high-voltage switchgear, circuit breakers, disconnectors, and earthing switches
  • cables, cable systems, and accessories
  • prefabricated substations and related equipment
  • gas-insulated and air-insulated switchgear
  • surge arresters, insulators, insulator strings, and bushings
  • busbar systems
  • overhead-line conductors, fittings, and hardware
  • earthing and short-circuit devices

Advanced High-Voltage and High-Power Testing Infrastructure

DEKRA provides advanced testing capabilities for medium and high-voltage electrical infrastructure equipment used across transmission, distribution, industrial, and utility power systems.
Capabilities include:
  • power-frequency testing up to 1,500 kV RMS
  • lightning impulse testing up to 3,600 kV peak
  • switching impulse testing up to 2,800 kV peak
  • high-power testing up to 1,000 MVA
  • short-circuit testing up to 170 kA
  • synthetic testing
  • partial discharge measurements in controlled environments
  • radio interference voltage and corona measurements
  • indoor and outdoor testing for large electrical equipment
  • climatic, thermal, environmental, and mechanical testing facilities

Standards and Testing Requirements

DEKRA performs testing according to applicable international standards and regulatory requirements. The applicable requirements depend on the equipment, voltage level, intended application, and target market. The standards below represent the main references used in these programs.

Key standards include:

  • IEC 62271 series for switchgear and switching equipment
  • IEC 60076 series for power transformers and applicable reactor requirements
  • IEC 61869 series for instrument transformers
  • IEC 60502 series, IEC 60840, and IEC 62067 for power cables and accessories
  • IEC 60383 series, IEC 61109, IEC 60137, and IEC 60099 series for insulators, bushings, and surge arresters
  • IEC 61467 for power arc testing of insulator sets
  • IEC 60060 series for high-voltage test techniques
  • IEC 60270 for partial discharge measurements
Other product-specific standards and test requirements may also apply depending on the equipment, intended use, and target market.

Internationally Recognized Expertise

DEKRA combines specialized testing facilities and technical expertise for medium- and high-voltage equipment across its international laboratory network, giving customers coordinated access to the capabilities they need.
Our laboratories provide complementary capabilities for high-voltage, high-current, short-circuit, internal arc, temperature-rise, environmental, and mechanical testing. Key testing facilities are located in Europe, the Middle East, and Asia, including specialized laboratories in Hungary, the Netherlands, the United Arab Emirates, and China.
Selected DEKRA laboratories and certification bodies operate under relevant international accreditations and recognitions. These include accredited testing, certification, and inspection activities, as well as participation in international testing and certification schemes.

Selected Recognitions:

  • ISO/IEC 17025 accredited testing laboratory
  • ISO/IEC 17065 accredited certification body
  • ISO/IEC 17020 accredited inspection body
  • National Certification Body (NCB) within the IECEE CB Scheme
  • Operator of CB Testing Laboratory (CBTL) activities
  • VEIKI-VNL Testing Laboratory (Budapest, Hungary) is a member of STL (Short-Circuit Testing Liaison)
  • Recognition by utilities, authorities, consultants, and end users across Europe, the Middle East, and Asia
Why DEKRA?
Expert Knowledge of Standards

Work with experts who combine in-depth knowledge of applicable standards with active participation in industry consortia and standardization groups.

Flexible Testing Routes

Choose the testing route that best fits your needs: at DEKRA laboratories in Dubai, Hungary, Asia, or the Netherlands, or at your own laboratory or a third-party facility under DEKRA supervision.

Widely Recognized Certificates

Use independent test reports and certificates that are widely recognized by grid operators, utilities, authorities, end users, and other stakeholders in international markets.

Specialized Testing Infrastructure

Access dedicated facilities for dielectric, impulse, short- circuit, switching, internal arc, temperature-rise, and other demanding test conditions.