Testing and Commissioning

The electrical acceptance testing and commissioning of electric power systems is essential to the start up of any electrical system for the first time, regardless of its size, type or industry. It is a very special occurrence and poses some unique challenges to electrical personnel. Inexperience and poor planning will inevitably result in prolonged delays in the start up which can lead to costly productivity losses.

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:

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

Transformers
HV & LV winding Insulation tests
Winding ratio checks
Bucholz testing
Oil sample and testing (electrical breakdown, acidity, water & PCB content, Disolved gas analysis)