Medium Voltage & High Voltage Equipment

MV & HV Equipment in Transmission and Distribution Systems

power pole

For power grid operators and utility companies the reliability of their power transmission and distribution equipment installed in their network is vital. Investments in grid renewal and extensions are costly; equipment needs to last for decades. On top of that, it is important to eliminate electrical failures, reduce power outages, and increase the safety of people who work in critical environments.

A safe power grid, safe equipment and systems, adequate processes and trained employees are paramount. By working with an independent third party like DEKRA, manufacturers can prove that their products have been tested according to international standards, meet end-user specifications, and relevant safety regulations. At the same time, grid operators and utility companies can rely on our certificates, reports, and verification services to assure the required level of reliability and safety.

DEKRA makes sure that manufacturers comply with international standards, national deviations and end-user specifications to maintain a high level of safety and reliability. We offer you the complete scope of low, medium and high voltage testing for power transmission & distribution equipment. Our services are applicable to equipment manufacturers, energy utility companies, grid operators and large-scale energy users, amongst others.

High voltage laboratory

DEKRA is an approved third party inspection and testing company by power grid operators and utility companies in a large number of countries in Europe, Middle East, Asia and South America. VEIKI-VNL joined the DEKRA family in 2017 and complements DEKRA’s capabilities with a broad range of in-house testing services, e.g. short circuit testing (including short-circuit testing liaison [STL] membership), high voltage testing and temperature rise testing as well as aging tests. VEIKI-VNL supplies its services to reputable national and international transmission and distribution (T&D) equipment manufacturers as well as energy utility companies in over 40 countries on all continents.

Our services

Typical services we offer include type testing, product certification, production supervision, factory acceptance tests, quality assurance, factory inspections, non-destructive testing, failure investigations, and inspections as part of asset management programs. We believe testing should be done as close as possible to manufacturers and end users. That’s why we offer testing near your premises, either in one of the DEKRA laboratories, your own laboratory under DEKRA supervision or in one of our associated third-party laboratories under DEKRA supervision.

We provide local services to help you extend your global reach

Our testing laboratories are located in the Netherlands, Hungary, the United Arab Emirates and China. In addition, our Dutch and China-based high-voltage inspection teams witness type testing at manufacturers’ sites and/or third-party laboratories around the world, including in Europe, the Middle East, South Korea, China, Japan and the USA.

Our certificates and test reports are widely recognized and accepted by grid operators, utility companies, end users, governments, authorities and other stakeholders around the world. We can provide you with a reference list on request. The DEKRA services cover a wide range of products and standards for which we are accredited as a testing laboratory (ISO-IEC 17025), as an inspection body (ISO-IEC 17020) and as a Certification Body (ISO-IEC 17065). Our employees are highly qualified and experienced, and personal references can be provided on request.

Middle East

The DEKRA Middle East Testing Laboratory, located in Dubai, UAE, performs tests for products such as switchgear assemblies, cables, busbar trunking systems and packaged substations in line with national and international standards and client-specific requirements. In addition, preliminary testing is performed during the product design phase.

Active in the entire energy grid

At DEKRA, we work to provide safety throughout the entire power value chain, from where power is generated and transmitted to the final distribution and user. Our experts carry out many different tests throughout our global network of laboratories.

  • Power Transformer
    Liquid-immersed transformers, Dry power transformers and reactors;
  • Switchgear:
    • GIS,
    • VCB,
    • SF6 circuit breaker,
    • Load switch,
    • Earthing switch,
    • Switchgear cabinet (include RMU),
    • Metal enclosed bus
    • Prefabricated substation
    • More…
  • Instrument transformers
    CT, PT and combined transformers.

  • Type testing (IEC/EN standards, STL guide)
  • Sampling inspection based on routine test for manufacturers
    Intermediate performance check for end users(power supply bureau, power plants, enterprises)
  • Performance testing
  • Pre-shipment & Post-shipment inspection
  • Equipment coincidence check and following inspection onsite to end users

  • Power transformers: IEC 60076 series
    • Measurement of winding resistance
    • Measurement of voltage ratio and phase displacement
    • Measurement of short-circuit impedance and load loss
    • Dielectric tests
    • Temperature-rise
    • Short-circuit withstand test
    • partial discharge measurement
    • sound level
  • Switchgear:
    IEC 62271 series

    • Dielectric test
    • Measurement of the resistance of circuits
    • Temperature rise
    • Short time current and peak withstand current
    • making and breaking capacity
    • operation of the included switching devices and removable parts
    • arcing due to an internal arc fault (IAC)
    • Verification of IP degree
  • Instrument transformers: IEC 61869 series and IEC 60044 series
    • Temperature-rise test
    • Dielectric test
    • Test for accuracy
    • Short-time current tests
    • Verification of the degree of protection by enclosures
    • Measurement of capacitance and dielectric dissipation factor
    • Internal arc fault test
    • Wet test for outdoor type transformer
    • Partial discharge measurement

  • Buyer recognition
    With DEKRA tested or certified, your products will be highly accepted in the world.
  • High efficiency and local testing
    Expertise and localised testing services are the highlight of DEKRA. We promise to shorten your lead time to market and help you save on costs.
  • Expertise and focus
    One-stop services offer you expert services throughout pre-testing guidance, testing, certification and post-market support, giving you easier access to markets.
  • Right the First Time
    All kinds of training courses and seminars enrich your knowledge of products and standards, helping you get the product design right the first time.

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