Presentation is loading. Please wait.

Presentation is loading. Please wait.

Ofil’s proprietary material Cannot be used without Ofil's explicit permission.

Similar presentations


Presentation on theme: "Ofil’s proprietary material Cannot be used without Ofil's explicit permission."— Presentation transcript:

1 Ofil’s proprietary material Cannot be used without Ofil's explicit permission

2 Ofil’s proprietary Material | 2011  Partial Discharge and the Corona Phenomenon  Solar Blind Imaging  Corona Inspection as a PDM tool in hand  Faults  Indications  Methodology

3 Ofil’s proprietary Material | 2011  Detect PD corona & arcing - in daylight  Diagnostic tool  Condition monitoring of critical components  Perform predictive maintenance

4  Trigger localized high e-fields that exceed a critical value kV/cm  Generates Audio noise Corrosive materials (O 3, NO - ) Radio and TV interferences UV - corona

5 E field e e + e e + e e e + -V e UV Ph In the presence of a strong E-field Free electrons accelerate Collide with air molecules and ionize them Additional electrons are released Photons are released with recombination Procedure repeats itself

6 Ozone blocks Solar UV Signals

7 Goal: Collect UV events & superimpose Imaging “Black Box” input - sceneryoutput - screen

8 Ofil’s proprietary material Cannot be used without Ofil's explicit permission

9  External – surface  Line of sight  Voltage dependent  Any weather conditions  Indicator & Actor  Fault early stage detection

10  Corrosion and erosion  Pitted cement  Hydrophobicity compromise  RFI/TVI

11 3. Lineman from EMC takes down the faulty arrestor 1. Corona during hazy day 2. Camera depicts the exact corona arcing location RFI/TVI Case 1: A US Government Licensed Radio Amateur Operator: The receiving equipment was reading a noise level of some 30 dB over S9 (Signal strength is measured in S-units from S1 to S9) and the noise blanking system of the receiving equipment could not eliminate the noise.

12 Case 2: USA 1.RFI at FAA Control Tower during wet weather 2. The source: Bad grounding on 4.16kV, 12.47kV, 115kV insulators Case 3: Czech Republic 1.RFI at Czech Radio Telecomm Authority experienced TVI 2. The source: Pin of a ceramic insulator was wrongly installed

13 Tracking & loss of hydrophobicity

14 Brittle fracture: corona cameras can clearly show surface discharge that exists on insulators with housing imperfections in order to avoid catastrophic failure.

15  Faulty designs  Faulty installations  Poor material  Existing processes

16  No corona ring  Grading ring installed backwards

17  Cracked insulator  Wrong design

18 AN, RI, TVI concern? Events per Minute Can it be damaged by corona? Corona- where? Critical component? Material type Critical location? Corona intensity? No Yes High>

19 THANK YOU


Download ppt "Ofil’s proprietary material Cannot be used without Ofil's explicit permission."

Similar presentations


Ads by Google