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Logo Institut für Hochspannungstechnik und Energiesysteme der TU Braunschweig
High voltage hall
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High voltage hall

Investigations of power components often requires voltages well above 100 kV. For these voltages, elenia has the high-voltage hall. 

In general, there are three types of voltage that are particularly important in power engineering: AC voltage, DC voltage and surge voltage. Each of these can be tested at elenia. Voltages of up to several hundred kilovolts can be generated for the tests, which can be measured using measuring systems, some of which are decoupled via optical fibers. Various single-phase transformers, the Marx lightning impulse voltage generator, and a Greinach cascade are available to generate the high voltage, allowing high-voltage insulators, switches and other insulation systems to be tested for electrical strength under various conditions. One of these conditions can be temperature, and an LN2 cryostat is available for testing at cryogenic temperatures. In the temperature range between room temperature and 150°C, breakdown and PD tests can also be performed in a parallel test facility. Other test parameters can be provided on request.

Hochspannungshalle
Lightning Surge Generator

The Marx surge generator is available for the generation of high surge voltages (PDF)

The Marx generator has the following features

  • 8 stages

  • Per stage: 200 nF and 250 kV

  • Surge energy 50 kWs

  • Tests currently possible up to 1 MV

  • 1.2/50 pulses, other pulse shapes are possible

AC Voltage Generator

A WS transformer is available for generating high AC voltages (PDF)

 

The WS transformer (TEO-800/400) has the following features

  • Three taps of 200 kV, 400 kV and 800 kV

  • Rated current 0.5 A each

  • Rated power up to 400 kVA

  • 50 Hz frequency

Greinacher Cascade

A Greinacher cascade is available for generating high DC voltages. (PDF)

 

  • Connection to WS transformer

  • Up to 800 kV DC voltage

  • Positive and negative DC voltage selectable via diode

  • Integrated resistor divider

Cryostat

A cryostat is available for testing the dielectric strength of liquid and gaseous nitrogen. (PDF)

 

  • Lightning surge voltages up to 200 kV

    AC voltages up to 140 kV

  • PD charge < 1pC to an effective AC voltage of Urms = 70 kV

  • Pressure up to 3 bar (absolute)

  • Temperature range down to about -196°C

  • Cooling within 90 minutes

  • Variable electrode geometries

Partial Discharge Measurement

A measuring cabin is available for partial discharge diagnostics. (PDF)

 

  • Voltages up to 100 kV

  • Basic noise level < 1 pC

  • Parallel test system for breakdown testing

  • Omicron MPD 600

  • In oil and air

  • From room temperature to 150°C

Camera Images

A high speed camera from Photron is available for optical inspection of the plasma in the specimen (PDF).

 

Product information about the camera:

  • Maximum resolution of 1024x 1024 pixels
  • Black and white images
  • Maximum frame rate of 800 kfps
  • Minimum exposure time of 0.2 µs

Contact Person:

Karen Flügel

Benjamin Weber

Timo Meyer

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