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The testing and commissioning of high voltage electrical equipment with Powersystems excellence and exacting standards.
Powersystems testing capability covers an extensive range of disciplines.
The testing and commissioning of high voltage electrical equipment is a highly specialised activity with each and every installation being tested by a trained engineer to exacting standards.
Powersystems testing capability covers an extensive range of disciplines, including cable installations, transformers, switchgear, protection, earthing and underground fault location.
Cable installations
- 1 kV and 5 kV insulation tests
- DC pressure tests up to 33 kV
- VLF cable testing
Transformers
- HV and LV winding insulation tests
- Winding ratio checks
- Bucholz testing
- Oil sample and testing (electrical breakdown, acidity, water and PCB content, dissolved gas analysis)
Switchgear
- AC pressure testing
- Ductor testing
- CT’s – Ratio and flick tests, mag curves
- VT’s – Ratio and polarity checks
- Functionality checks
- Protection testing
Protection
- Primary and secondary injection
- Timing tests
- Overcurrent and earth fault relays
- Directional overcurrent and earth fault relays
- Differential transformer protection
- Translay and Solkor feeder unit protection
- Restricted and standby earth fault relays
- Generator loss of mains and G99 protection
- Neutral voltage displacement
- Transformer auto tapping relays
- Inter tripping schemes.
Earthing
- Soil resistivity measurements
- Final earth electrode resistance
Underground fault location
- Digital pulse echo
