Corona and arcing detection in substations

DayCor® and UVollé provide for maintenance technicians' need for UV inspection equipment. Both systems are used during commissioning of large and small substations and for routine predictive and preventive maintenance tasks. Ofil's DayCor and UVollé enable pinpointing sources of partial discharge and designate thereby faulty components and components in deteriorating stages. Using Ofil's systems in substations can prevent outages and flashovers and reduces significantly the maintenance costs.

• Degradation of Polymer insulators
• Contamination - coastal salt; industrial vapors and dusts; cement dust; highway road-salt; tire dust and car emissions; agricultural dusts and fertilizers
• Cracked porcelain insulators
• Rusted cement and metal caps & pins on porcelain insulators.
• RFI, TVI and audio noise sources lead to customer complaints
• Wrong design and improper installation, that may lead to mechanical and electrical failure, of: hardware such as corona ring, conductors ADSS etc…
• Shorted bells
• Loose hardware such as: spacers, slices, clamps etc.

Why UV Inspection?

The ability to easily detect corona and arcing sources and pinpoint their locations can save utilities considerable amount of money: The information obtained by UV inspection leads to:

• Prioritizing maintenance tasks
• Avoiding unnecessary line washings
• Concentrating on the faulty hardware
• Avoiding redundant testing and replacement of line elements not directly involved with corona generation

Inspection methods

• DayCor^®Superb - for foot patrol of large substations
• UVollé - for foot patrol of small substations
  
• DayCor^®Rom - for airborne inspection of large substations