Besides high voltage testing, other examinations can be performed, among them measurements of conventional partial discharge (PD) ), measurements of dissipation factor and capacity, and rain tests. If required, monitoring camera systems and microscopes are used. In addition to the main testing bay, a secondary testing bay permits long-term insulation testing under DC and AC to simulate aging processes. Both bays are shielded. This makes sensitive PD measurements with a very low noise level of less than 1 pC possible.
Abstract from the testing portfolio of the high-voltage testing laboratory
- Lightning impulse voltage
- Alternating voltage
- Direct voltage
- Switching impulse voltage
- Long-term tests of insulation materials under DC and AC
- Partial discharge measurement (PD)
- Measurements of dissipation factor and capacity
- Rain tests
Our laboratory also provides material testing and characterization like:
- Investigation of dielectric breakdown strength for solid or liquid dielectric materials: breakdown tests performed with different test speeds (V/s), according to (IEC 60243 or IEC 60156 Standard) using semi-spherical (VDE), spherical, cylindrical, blunt point, disc or needle shaped electrodes
- Investigation of dielectric permittivity and the dielectric losses (tan D) for solid insulating materials: Cs / Cp and dissipation factor measurements under low AC voltage, going from 5 µHz up to 50 MHz, with or without DC bias (IEC 62631-2-1)
- Investigation of electrical volumetric or surface resistivity (conductivity) of solid insulating materials :
- Resistivity measurement (IEC 60093, IEC 62631-3-1, ASTM D257-14)
- Polarization index / insulation resistance based on polarization and depolarization currents measurements (IEEE 43-2000)
- Investigation of the ageing behavior of solid or liquid dielectric materials
- Voltage endurance testing at room temperature or combined with thermal stress (IEC 61251)
- Thermal or thermo-electrical ageing under specific conditions as defined by the end user
Main test bay, (10x8 m,h=6 m)
- DC generator : 400 kVdc / 12mA
- AC generator : 200 kV / 50Hz / 250mA
- Impulse generator : 400 kV / 12 kJ with impulse analyzing system
- Current impulse generator : 100 kA / 20 kJ
- Bamberg Test system 100 kV
Secondary test bay for long duration testing
- Bamberg Test system 100 kV AC and DC
- Material testing and characterization
- Keithley electrometer 6517B : multipurpose high resistance / low current electrometer
- Omicron SPECTANO 100 : Dielectric Material Analyzer for the characterization of solid and liquid insulation materials in the time (PDC) and frequency (FDS) domain
- Agilent 4294A Precision Impedance Analyzer
Accessories:
- Partial discharge AC and DC : Omicron MPD 600 (noise < 1 PC at 200 kV)
- Tg δ : Omicron Tando 700
- Set up for test under rain
- Climatic cabinet (-70°C/-70°C)
- Several dividers, sensors, resistors, capacitors, diodes and inductors for special set ups
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