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testing and commissioning
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.
- Cable installations
- 1kV and 5kV Insulation tests
- DC pressure tests up to 33kV
- VLF cable testing
- Transformers
- HV & LV winding Insulation tests
- Winding ratio checks
- Bucholz testing
- Oil sample and testing (electrical breakdown, acidity, water & PCB content, Disolved gas analysis)
- Switchgear
- AC pressure testing
- Ductor testing
- CT’s – Ratio & flick tests, Mag curves
- VT’s – Ratio & 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 G59 protection
- Neutral voltage displacement
- Transformer auto tapping relays
- Intertripping schemes
- Earthing
- Soil resistivity measurements
- Final earth electrode resistance
- Underground fault location
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