Substation Commissioning and PD Testing in Saudi Arabia and the UAE
When a new substation is commissioned in Saudi Arabia or the UAE, the acceptance process is rigorous — and increasingly, partial discharge testing during commissioning is a mandatory step rather than an optional extra. Commissioning PD testing catches defects made during installation before they become in-service failures, and it protects both the owner’s investment and the contractor’s warranty position.
Why PD Testing Belongs in the Commissioning Sequence
Installation defects — damaged cable terminations, contaminated spacers, incorrect sensor mounting, moisture ingress during construction — all produce partial discharge from the first energization. Finding them during commissioning is far cheaper than finding them under warranty claim after a year of operation.
Typical Commissioning Tests Where PD Applies
- Cable circuit tests with oscillating wave or resonant systems after termination installation
- GIS energization with UHF monitoring of each compartment
- Transformer bushing and tank screening with HFCT and acoustic methods
- Switchgear panel screening with TEV before handover
Standards and Acceptance Criteria
Commissioning PD measurement follows IEC 60270 principles, with acceptance based on background-corrected levels and phase-resolved pattern analysis. In practice, Gulf projects specify maximum acceptable PD levels per asset type, and require documented baseline records that become the reference for future condition monitoring.
Practical Program for Saudi and UAE Projects
| Stage | Test | Deliverable |
|---|---|---|
| Before energization | Offline cable and bushing PD testing | Clean-baseline certificate |
| During energization | UHF monitoring of GIS bays | Energization record per bay |
| After 72 h operation | Repeat screening, compare patterns | Stability confirmation |
| Warranty period | Quarterly screening or online monitoring | Trend records for claim protection |
HUWOR’s cable oscillating wave partial discharge tester and handheld partial discharge detector cover the offline and on-site screening stages; UHF sensors cover continuous monitoring during and after energization.
Preparing Your Team for Commissioning Tests
Commissioning PD data is only useful if the people interpreting it understand patterns. Ensure the commissioning team receives training on measurement practice and pattern interpretation, and store baseline records in a platform that supports later trend comparison — the same platform used for ongoing monitoring. For support structuring commissioning test programs and training local engineers, contact our export team or review the Middle East solutions page.