Sound Solutions for Electrical Tracking
Airborne and structured-based (A&SB) ultrasound can be used to detect various electrical faults. Faults including corona discharge, tracking, and arcing. The PowerBeam 300 parabolic accessory allows the technician to locate sources of ultrasound with pinpoint accuracy from distances up to 300 feet away. Additionally, the InCTRL platform and InCTRL mobile app can be used to record samples. As well as store testing history, and communicate faults through a management chain. InCTRL’s FFT spectral analysis feature can be used to diagnose recorded samples for electrical failures.
Arc tracking is a progressive electrical failure which leads to creation of a carbonized path along the surface of a non-conducting insulator that connects two or more electrical conductors. Once a carbonized path is created, current flow, including arcing, may then occur along this path.
Our Sound Solution
- After a short training lesson to become familiar with the application of CTRL’s UL101, the maintenance technician selects the UL101 receiver, headset, and concentrator from kit.
- Verify operation of UL101 in accordance with the operator’s manual.
- Ensure electrical system under test is safely energized.
- Without opening anything, begin at one end or the electrical system and scan around electrical cabinet vents and door openings from approximately 10 feet away.
- Listen for electrical arc pops that originate from within the electrical housing.
- Once a determination is made concerning the approximate location of internal electrical arching, open electrical housing using approved methods. Make repairs and re-verify using procedures above.
Arc tracking is significantly enhanced by high voltage and conductive contaminants, such as dirt and moisture on the surface of non-conductive insulators. Temperature, humidity, and strain are all factors, which may contribute to electrical arc and tracking within electrical systems. The UL101 ultrasound detector is used for routine scans of switchgear, substations, transformers and transmission lines. Ultrasound can be used in conjunction with infrared thermography as part of a preventive maintenance and predictive maintenance program, capable of detecting arcing, tracking, and surveying for partial discharge indicative of longer term insulation concerns and possible safety issues. It can provide a warning of arc flash danger from a safe distance of closed electrical panels.