Inspection methods to determine potential arc flash

Ultrasound inspection is an effective screening tool for detecting the potential for arc flash incidents through non-invasive procedures, as well as open sub-stations. When hand-held ultrasonic instruments are used to scan enclosed electrical apparatus the procedure is fast, accurate and simple. It can help inspectors by eliminating the need for wearing cumbersome, uncomfortable PPE during a preliminary survey. This method can also alarm personnel, as well as identify the presence of arcing, tracking and corona in advance of an inspection, in high, medium and low voltages.