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Ofil's Daytime Corona Camera


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Ofil manufactures daytime corona cameras with DayCor® technology inside. Ofil's cameras are non-destructive and non-intrusive bi-spectral UV-Visible with high sensitivity to UV spectral range. Ofil's cameras detect corona and pinpoint the emitting sources. Used worldwide by thousands of predictive maintenance teams.dOfil manufactures daytime corona cameras with bispectral UV-Visible sensors that detect corona and its emmiting sources.

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Ofil's Daytime Corona Camera

  1. 1. Ofil’s Daytime Corona Cameras <br />
  2. 2. Daytime<br /><ul><li> Safety
  3. 3. Economic
  4. 4. Routine</li></ul>corona cannot be seen during daytime <br />
  5. 5. Corona – what is it?<br /><ul><li>We refer to the glow around a conductor or insulator or any high voltage electrical hardware as corona
  6. 6. Corona is caused by ionization of gas, where electrons that have gained energy from the local e-field revert to their original state and release light/energy mostlyin the UV range
  7. 7. A critical value of e-field (~24Kv/Cm) is needed to induce the local corona discharge
  8. 8. Local – it is around its source because the dielectric material does not allow ionization to propagate and the e-field decays rapidly with distance</li></li></ul><li>Corona – why bother?<br /><ul><li>The reliability of high voltage power system is related to corona discharge parameter on a component level</li></ul>Because<br /><ul><li>Corona causes insulation deterioration and to components degradation and to audio noise and radio interference
  9. 9. All power system components should be tested to verify that this parameter is controlled</li></li></ul><li>Corona triggers degradation due to<br />Ultra Violet Radiation. Polymer material is susceptible to degradation due to UV more than to solar radiation<br />Ozone (O3) – Ozone is a byproduct of corona discharge. Ozone attacks materials such rubber, gaskets and seals<br />Acids – both organic (oxalic) and inorganic (nitric)Moisture in combination with contamination and corona create acid. Acid on polymers are active degradation factors<br />Mechanical attack– repeated corona bombardment drills holes in the polymeric substance. <br />
  10. 10. Corona camera for daytime <br />Principle:<br />Bi-Spectral UV-Visible<br />Input: UV radiation – unseen by human eye + Visible view of the background <br />Output Visible representation of the unseen UV overlaid on the background <br />
  11. 11. The spectrum: UVc is in the solar blind<br />UV<br />IR<br />120<br />C<br />B<br />A<br />10<br />100<br />8<br />80<br />Solar Radiation (µW/cm2/nm )<br />6<br /> Filter Transmission (%)<br /> 60<br />4<br />40<br />2<br /> 20<br />200<br />300<br />400<br />500<br />600<br />700<br />800<br />900<br />1000<br />Wave length (nm)<br />visible range<br />corona<br />
  12. 12. Bi Spectral imaging<br />250 kV<br />Combined mode<br />Visible mode<br />UV mode<br />
  13. 13. Examples - Transmission<br />Transmission - BN<br />
  14. 14. Examples - distribution<br />Pinpoint corona sources<br />13.4kV<br />
  15. 15. Examples - substation<br />
  16. 16. Examples - switchgear<br />
  17. 17. Examples - motors<br />
  18. 18. BenefitsofOfil’sCoronaCameras<br />Non-destructive (NDT) Corona Cameras allows you to:<br /><ul><li>Make daytime Inspection
  19. 19. Remote sensing
  20. 20. Detect Corona and UV events
  21. 21. Locate and pinpoint Corona
  22. 22. Measure UV events
  23. 23. Record each corona source
  24. 24. Create a PdM for Cost Effective purposes</li></li></ul><li>Platforms<br /><ul><li>Aerial
  25. 25. Hand held for on foot patrol
  26. 26. Vehicle mounted
  27. 27. Compact handy hand held</li></li></ul><li>Range of products<br />DayCor ®family<br /><ul><li>Sueprb
  28. 28. Ranger
  29. 29. Rail
  30. 30. Rom
  31. 31. ROMpact</li></ul>UVolle<br /><ul><li>UVolle-Vi
  32. 32. UVolle-S</li></ul>CITI – Corona Inspection Training<br />
  33. 33.<br />Thanks.<br />