Ultrasonic Electrical Inspection

At any voltage thermal anomalies and sources of ultrasound such as tracking and arcing can occur. In most common ut applications very short ultrasonic pulse waves with center frequencies ranging from 0 1 15 mhz and occasionally up to 50 mhz are transmitted into materials to detect internal flaws or to characterize materials. Any of these conditions threaten the reliability of the equipment being inspected.

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How ultrasonic electrical inspection works partial discharge tracking arcing and corona all produce ionization which disturbs the surrounding air molecules.

Ultrasonic electrical inspection.

Ultrasound and infrared technologies are a perfect match when conducting inspections of electrical equipment. Gettle s ultrasonic testing specialists provide full service testing solutions that can identify electrical system issues before they lead to. To help us identify any problem issues before we begin we use ultrasonic probes carrying out energised testing our trained technicians use ultrasonic probes as safety devices before opening any electrical enclosure to identify any unusual electrical noise such as mechanical chatter arcing and tracking within your equipment. The inspection s findings an ultrasound examination of one of the units revealed a suspect sonic signature in the b phase coil.

However if background noise or other competing sounds are present raising or lowering the frequency 1 khz to 3 khz may limit the interference allowing the user to detect and. Ultrasonic electrical inspection white areas indicate voids in this ultrasonic image of a brazed contact tip switching contacts such as used in relays contactors and switchgear depend on brazed and welded joints between the contact tip typically silver alloy although other materials are also used and the carrier typically copper. When performing an ultrasonic electrical inspection the ultrasound technician may select 40 khz to detect an electrical anomaly sound waves moving through the air. In most common ut applications very short ultrasonic pulse waves with center frequencies ranging from 0 1 15 mhz and occasionally up to 50 mhz are transmitted into materials to detect internal flaws or to characterize materials.

Ultrasonic testing ut uses high frequency sound energy to conduct examinations and make measurements. An ultraprobe detects high frequency sounds produced by these emissions and translates them via heterodyning down into the audible ranges. Corona can also occur at 1000 volts and greater. Ultrasonic inspection can be used for flaw detection evaluation dimensional measurements material characterization and more.

Ultrasonic testing ut is a non destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. To illustrate the general inspection principle a typical pulse echo inspection configuration as illustrated below. Ultrasonic testing ut is a family of non destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. Ultrasonic testing ultrasonic testing uses ultrasound technology to detect high frequency sounds related to electrical discharges resulting from the ionization of arcing tracking and corona.

For comparison an ultrasonic sound recording was taken of the sister unit which was under similar operating conditions.