Combined hyperbaric & dielectric test platform

A unique facility for integrated tests on subsea equipment


Our cutting-edge test platform is designed for testing subsea equipment under water pressure up to 40 bar. The key to design validation is conducting tests in a controlled environment with conditions as close to real life as possible. Our research and characterisation activities, carried out in our laboratory, allow you to reduce the development costs of your subsea solutions.

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Along with our high voltage testing facilities, our test platform specifically targets subsea cable, connectors, penetrators and even power distribution hubs for AC and DC medium to high voltage applications.

Our customers are mainly involved in offshore applications such as marine renewable energies (wind, wave and tidal) and subsea distribution systems.


The stainless steel cigar-shaped vessel can accommodate large objects that can be tested up to 40 bar – equivalent to a depth of 400 m.

The non-magnetic properties of the stainless steel prevent undesired losses when AC heating current is applied.

The material’s high corrosion resistance enables the use of salt water as the pressure medium to achieve conditions that are as close as possible to real-life.


Pressure regulation

Regulated pressure test profiles with PID controlled pressure and a depressurisation rate up to 20 bar/min.

Object monitoring

  • Ability to add specific monitoring or power supplies
  • Active water temperature regulation can be added upon request

Power cable feedthroughs

  • Up to 6 x 66 kV or 2 x 600 kV cables through the front door
  • Up to 3 x 66 kV or 1 x 600 kV cables through the rear flange


The hyperbaric vessel is mobile and can be easily installed in either of our HV platforms to combine pressure conditions with thermal and dielectric tests, in AC or DC.

Their main features are detailed in the table below.


Medium voltage hall
Faraday cage
High voltage laboratory
Faraday cage
Hall dimensions L 9.5 m x W 5.5 m x H 3 m
  • L 18 m x W 17 m x H 15
HV source Up to 100 kVAC
  • Up to 600 kVAC
  • Up to 1200 kVDC
Heating transformer
(with dummy loop)
2 x 1 kA
  • 2 x 5 kA
Impulse generator N / A
  • 2000 kV – 200 kJ


Our hyperbaric vessel is a valuable asset for subsea material or equipment suppliers and their end users – such as, system operators. During the development and qualification phases of subsea components, the vessel can be used for assessing mechanical behaviour and when coupled to HV testing equipment, it can assess :

  • Dielectric strength under pressure and thermal stresses of subsea HV equipment
  • Ageing behaviour of materials under high voltage, thermal and hydrostatic pressure stresses
  • Other characteristics, according to specific requirements

Your input is valuable

We would very much appreciate your input on the following 3 easy questions.
This survey is totally anonymous (e-mail is optional) and the collected data will only be used inside SuperGrid Institute organisation. 

What are the voltage rating of your current and future products? *
In your opinion, what are doing the most significant developments in the coming years for your industry? *
What type of tests are you performing or would be interested in for your products? *