Electrical systems and equipment of up to 1000 V and above
- Insulation resistance
- Earthing systems resistance
- Impulse resistance of lightning conductors
- Insulation testing of cable lines of up to 20kV and transformers by using raised constant voltage and raised voltage of industrial frequencies
- Loading equability of cable lines
- Active resistance
- Volt-ampere characteristics
- Transformer connection group
- Transformation factor
- Dielectric breaking voltage of insulation liquids
Electrical systems and equipment of up to 1000 V
- Impedance Zs of the ‘Phase-protective conductor’ contour and neutral earthing of electric outlets
- Protective circuit breakers, starting current, starting time, ground conductor resistance and contact tensions