Electrical deterioration does not always begin with a visible defect or an obvious rise in temperature. Corona can develop where the electric field around high-voltage equipment ionises the surrounding air. If the activity continues, it can contribute to insulation degradation, interference and an increasing risk of failure. Finding the discharge while equipment remains energised gives maintenance teams time to investigate and plan an appropriate response.

We at Dutco Tennant LLC will showcase the CoroCAM® 8HD at Middle East Energy 2026. This professional corona discharge detection camera combines solar-blind ultraviolet imaging, radiometric long-wave infrared imaging and an HD visible channel in one handheld instrument. Visitors can examine it at our Stall No. H5, D10, from 1–3 September 2026 at Dubai World Trade Centre, UAE.

A Discharge Can Appear Before a Hotspot

Thermal inspection is widely used to locate abnormal heating in energised assets. It is valuable for identifying temperature differences, but corona does not necessarily create a clear thermal signature during its early stages. A thermal-only survey may therefore answer one question while leaving another unresolved.

Solar-blind UV imaging targets the ultraviolet emissions associated with corona in daylight. The CoroCAM® 8HD uses a 240–280 nm solar-blind band and overlays detected activity on a visible or thermal view. Inspectors can see where the signal is located on the asset instead of recording an unreferenced indication.

Corona is a form of partial discharge associated with ionisation around high-field regions. A partial discharge detection camera for GCC inspection programmes can provide useful optical evidence of this activity, but it does not replace every electrical PD test. Where the source or severity requires further diagnosis, UV findings should form part of a wider condition-assessment process.

Three Views Build a Stronger Inspection Record

Each imaging channel contributes different evidence. Used together, they help teams separate discharge activity, heat and physical location.

The UV channel detects and counts corona activity within a selected area. Adjustable integration, noise reduction and threshold controls help inspectors manage signal visibility and reduce false indications. Settings should be documented so future surveys can be compared on a consistent basis.

The radiometric thermal channel has a resolution of 640 × 512 pixels and a stated measurement range of -40°C to 160°C. It can reveal whether the inspected location also has an abnormal thermal pattern. This is useful because a corona indication without heating and a hotspot without corona may require different follow-up actions.

The 1920 × 1080 visible channel provides the asset context needed for identification and reporting. Its camera module offers 30x optical zoom, helping inspectors examine overhead infrastructure from a suitable working position. Display modes include UV with visible, UV with thermal, visible only, thermal only and UV only.

Turning Images Into Maintenance Priorities

Collecting an image is only the start of predictive maintenance substation inspection. The operational value comes from linking the finding to the correct asset, checking it against inspection conditions and deciding what should happen next.

A practical workflow begins with a structured survey route. Asset IDs, phase positions, viewing distance, weather conditions, camera settings and loading information should be recorded. When a signal is found, the inspector can capture visible, UV and radiometric thermal evidence during the same inspection session.

The instrument stores standard images and video as well as UCF files containing raw UV and radiometric thermal information, settings and calibration values. This creates a more useful basis for technical review than a screenshot alone. Maintenance teams can compare the evidence with previous surveys, decide whether closer investigation is required and schedule work according to the organisation’s risk criteria.

Trend quality depends on repeatability. A change in distance, viewing angle, background, threshold or environmental conditions can affect what the operator observes. Inspection procedures should therefore define how surveys are performed and how findings are classified. Training remains as important as camera capability.

Where Thermal-UV Inspection Fits Across the Network

Utilities can incorporate thermal UV inspection of high-voltage assets into condition-based maintenance routes for substations and overhead networks. The camera is intended for professional inspectors examining high-voltage infrastructure, including locations where direct access is restricted or taking equipment out of service solely for an initial check would be disruptive.

For transmission corridors, a ground-based survey can focus on selected towers, insulators and line hardware from an appropriate observation point. Substation teams can apply the same combined imaging principle when reviewing outdoor high-voltage assets. The objective is to identify abnormal evidence and refer it for engineering assessment, rather than diagnose every defect from one image.

Drone corona inspection of a transmission line requires a UAV-specific camera configuration, compatible gimbal, flight permissions, an approved operating procedure and appropriately trained personnel. The handheld CoroCAM® 8HD featured here should not be assumed to be the UAV model. Project teams should define whether ground, vehicle-based or aerial inspection is suitable before procuring equipment.

Building a Defensible Survey Programme

Before selecting a UV corona camera for Middle East projects, we recommend reviewing the inspection distance, target assets, ambient conditions, reporting format, operator competence and required measurement traceability.

Equipment protection and field handling also deserve attention. The handheld unit has an IP43 rating, operates within a stated ambient range of -15°C to 55°C and weighs 2.5 kg with its battery.

Survey frequency should reflect asset criticality, operating history and previous findings. A baseline inspection is especially useful because it gives future teams a reference. Repeat surveys should use comparable settings and observation positions wherever practical.

Clear escalation rules can then define which indications are monitored, investigated further or assigned for corrective work. Early evidence does not automatically mean that an outage is imminent, but it can give engineers more time to verify the condition, prepare resources and coordinate access before reliability is affected.

Explore CoroCAM® 8HD at Our MEE 2026 Stall

Among the Middle East Energy 2026 exhibitors, Dutco Tennant LLC will present inspection technology alongside solutions for the wider electrical network. Visitors comparing MEE 2026 Dubai suppliers can use the event to discuss how combined UV, thermal and visible evidence fits their maintenance procedures.

At our Stall No. H5, D10, we will walk visitors through the imaging channels, display modes, field settings and reporting workflow. Engineers and utility teams can bring questions about inspection routes, target assets, operating conditions and evidence management.

The Dubai World Trade Centre energy expo runs from 1–3 September 2026 at Dubai World Trade Centre, UAE. Reliable corona discharge detection camera use depends on more than sensitivity. Consistent survey methods, correct interpretation and traceable records turn a detected signal into a defensible maintenance decision. We look forward to exploring that complete workflow with visitors at Middle East Energy 2026.