Medium Voltage Testing Laboratory

The Laboratories of Testing Laboratory Medium Voltage Frankfurt am Main

The Laboratories of "Testing Laboratory Medium Voltage Frankfurt am Main" is an independent Test Laboratory in accordance with the standard DIN EN ISO/IEC 17025 with decades of competence in testing switchgear and components for electrical power engineering.

The Laboratories of Testing Laboratory Medium Voltage Frankfurt am Main is a plant section of Siemens AG, Division Power Transmission and Distribution, Subdivision Medium Voltage and is as such a part of the Siemens Aktiengesellschaft, Berlin and Munich, and does not constitute a separate legal entity. It is a member laboratory of PEHLA and PEHLA is a member of STL (Short-Circuit Testing Liaison).

Our excellent relations with other testing laboratories, collaboration in committees and further active training guarantee a constantly high level of knowledge and facilities. Of course we treat all test results as confidential.

The testing laboratory is specialized in testing switchgear and other components of electrical power engineering, preferably of the medium-voltage level (rated voltages from 3.6 kV up to 52 kV). This includes:

  • Circuit-breaker switchgear

  • Load-break switchgear

  • Circuit-breakers

  • Switches

  • High-voltage AC contactors and motor starters with contactors

  • Disconnectors

  • Earthing switches

  • HV HRC fuses

  • Measuring transformers

  • Switch-fuse combinations

  • Factory-assembled compact substations

  • Cable sets


The Laboratories of Testing Laboratory Medium Voltage Frankfurt am Main

The Laboratories of "Testing Laboratory Medium Voltage Frankfurt am Main" is an independent Test Laboratory in accordance with the standard DIN EN ISO/IEC 17025 with decades of competence in testing switchgear and components for electrical power engineering.


High Voltage Laboratory

In the high-voltage laboratory we can apply peak, power-frequency and DC voltages to the test objects.


Calibration Department

In our DKD-calibration department we register all measuring systems used in our testing laboratory, calibrating them ourselves in most cases. All calibrations can be traced back to the standards of the German calibration service DKD (Deutscher Kalibrierdienst).


High Power Laboratory

In our high-power laboratory are two generators which supply the necessary power from the rotating mass of the rotors, isolated from the power supply system.



Temperature-rise Laboratory

The temperature-rise laboratory comprises 4 testing terminals for temperature-rise tests. The following systems are available:

  • 1x 1.000 A

  • 1x 2.000 A

  • 1x 5.000 A


Climatic Chamber

In the high-voltage laboratory we can apply peak, power-frequency and DC voltages to the test objects.


Mechanical Laboratory

In the mechanical laboratory we inspect the kinematic properties of test objects. This includes endurance tests of switching devices, test of the kinematic chain as well as function tests. For long-time tests there are automatic sequence control systems available.