Corona Discharge Cameras

Corona Discharge Cameras

Corona discharge cameras use acoustic imaging to visualise ultrasonic signals generated by ionisation on high-voltage equipment. By overlaying sound sources on a live image, these systems help utilities, contractors and maintenance teams identify discharge activity on assets such as insulators, bushings, switchgear and transmission hardware—before faults escalate.

What Is Corona Discharge?

Corona discharge occurs when high electric fields ionise the surrounding air. It can indicate surface contamination, mechanical damage or insulation deterioration. Because corona produces ultrasonic energy, it can be seen by an acoustic camera even when it isn’t visible to the eye.

Typical Applications

  • Substations & switchyards: Inspect lines, insulators, connectors and terminations.
  • Industrial plants: Check MV/HV boards and outdoor equipment for discharge activity.
  • Transmission & distribution: Survey overhead lines and structures for early-stage issues.
  • Predictive maintenance: Verify repairs and trend discharge levels over time.

Why Use Acoustic Imaging?

  • Non-contact detection: Identify sources at a safe distance.
  • Visual guidance: Sound energy is mapped directly onto the live camera view.
  • Fast localisation: Pinpoint the exact component producing discharge.
  • Documentation: Capture images/video for maintenance records.

Single-Purpose vs Multi-Purpose Models

Some acoustic cameras are tuned for gas leak detection only, while others support electrical inspections including corona and partial discharge. Choose according to your maintenance scope and asset mix.

Explore our visible category for more detail: Acoustic Imaging & Leak Detection Cameras.

3 Products Found