Ofil's Daytime Corona Camera

Ofil’s Daytime Corona Cameras ,[object Object]
Daytime,[object Object],[object Object]
 Economic
Routinecorona cannot be seen during daytime ,[object Object]
Corona – what is it?,[object Object],[object Object]
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
A critical value of e-field (~24Kv/Cm) is needed to induce the local corona discharge
Local – it is around its source because the dielectric material does not allow ionization to propagate and the e-field decays rapidly with distance,[object Object]
All power system components should be tested to verify that this parameter is controlled,[object Object]
Corona camera for daytime ,[object Object],Principle:,[object Object],Bi-Spectral UV-Visible,[object Object],Input: UV radiation – unseen by human eye + Visible view of the background ,[object Object],Output Visible representation of the unseen UV overlaid on the background ,[object Object]
The spectrum: UVc is in the solar blind,[object Object],UV,[object Object],IR,[object Object],120,[object Object],C,[object Object],B,[object Object],A,[object Object],10,[object Object],100,[object Object],8,[object Object],80,[object Object],Solar Radiation (µW/cm2/nm ),[object Object],6,[object Object],     Filter Transmission (%),[object Object], 60,[object Object],4,[object Object],40,[object Object],2,[object Object], 20,[object Object],200,[object Object],300,[object Object],400,[object Object],500,[object Object],600,[object Object],700,[object Object],800,[object Object],900,[object Object],1000,[object Object],Wave length (nm),[object Object],visible range,[object Object],corona,[object Object]
Bi Spectral imaging,[object Object],250 kV,[object Object],Combined mode,[object Object],Visible mode,[object Object],UV mode,[object Object]
Examples - Transmission,[object Object],Transmission - BN,[object Object]
Examples - distribution,[object Object],Pinpoint corona sources,[object Object],13.4kV,[object Object]
Examples - substation,[object Object]
Examples - switchgear,[object Object]
Examples - motors,[object Object]
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Ofil's Daytime Corona Camera