The ELA high voltage laboratory is the largest laboratory for research within high voltage insulation at NTNU. The main test equipment in the lab are:

• 500 kV AC one phase transformer, 200 kVA
• 1.2 MV, 60 kJ impulse generator, lightning and switching impulses

The high voltage hall is electromagnetic shielded and well suited for such as partial discharge measurements. The AC transformer also has an instantaneous circuit breaker trip in case of breakdown, making it well suited for investigation of design and defects in test objects such as cables etc.

The impulse generator have an energy level of 60 kJ, making it possible to perform tests and research on cables and transformers. It also features a phase synchronisation with the AC transformer for combined AC and lightning impulse testing.

For testing at lower voltage levels, the Cell Devided High Voltage Laboratory is used.