Localization
Focuses attention on a zone or component with emissions compatible with discharge activity.
Advanced corona and partial discharge detection
Acoustic inspection of energized installations to locate discharge indications, prioritize anomalies and support maintenance decisions without treating an indication as a final diagnosis.
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Acoustic detection, line inspection and evidence of corona activity on energized equipment.
Technical scope
Technical experience and capability to detect corona and other partial discharge activity in critical electrical infrastructure.
High-voltage installations require planned inspections to recognize early signals, discriminate interference and manage safety, asset degradation, operational unavailability and indirect costs.
- Acoustic inspection of substations, lines, insulators, terminations, connections and energized equipment within the agreed scope.
- Planning of routes, distances, interference, permits and safety controls for field work.
- Correlation of the acoustic image with visual inspection, weather, maintenance history and asset criticality.
- Documented findings, location, photographic evidence, technical observations and recommended confirmation or follow-up.
Traceable diagnostics
What the inspection contributes
Prioritization
Ranks findings using evidence, repeatability, operational context and criticality—not one image alone.
Traceability
Creates a comparable record to confirm, correct or trend the finding over time.
Acoustic detection is a recognized non-electrical technique for partial discharge localization. By itself it does not replace IEC 60270 apparent-charge measurement or asset-specific verification.
Do you need to inspect an energized installation?
Let us review voltage, assets, access, history and objectives to define a safe route and a useful report.
Technical service
When corona detection is useful
- Noise, interference or discharge indications are perceived near high-voltage equipment.
- A first diagnostic stage is required without taking the installation out of service.
- Critical insulators, connections, terminations or fittings need prioritization.
- Evidence is needed to plan an outage, maintenance action or complementary verification.
- Inspection plan and reviewed assets
- Acoustic and photographic finding records
- Location and operational context
- Technical classification and method limitations
- Recommendations for confirmation, correction or follow-up
Frequently asked questions
Does the inspection confirm internal partial discharge by itself?
No. It localizes compatible emissions and guides diagnosis. Confirmation depends on the asset and may require electrical, UHF, HFCT, UV or other methods.
Is it performed while the installation is energized?
Yes, this is an operational advantage, always within applicable approach distances, permits and safety controls.
Do rain and humidity affect results?
Yes. Environmental conditions influence corona activity and must be recorded when findings are interpreted or compared.
What equipment can be inspected?
Substations, lines, insulators, connections, terminations and other accessible equipment, depending on voltage, geometry, distance and site conditions.