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What is Acoustic Ultrasound Electrical Inspection?

CTRL airborne ultrasound solutions allow you to test your electrical system for ultrasound produced by arcing, tracking, or corona discharge. Our UL101 Electrical Inspector can help you prevent catastrophic electrical failures such: corona, an ionized electrical discharge, tracking, or the creation of a superficial electrical path, and arcing, a flame-like discharge of electrodes. 


Corona discharge creates an electrical field and energy that accelerates aging and generates long-term damage on the insulators. It leads to unstable operation of the power system and corrodes the dielectric and metallic parts that come in contact.


Tracking occurs when the insulation has been deteriorated by the corona. It is known as the superficial electrical path where bi-dimensional electrical treeing is created. Electrical treeing originates at points where impurities, gas voids, mechanical defects, or conducting projections cause excessive electrical field stress within small regions of the dielectric. 

Arcing occurs between two electrodes subjected to a potential differential are placed within a rarefied gaseous atmosphere, forming a flame-like discharge. If accidental, arcing can be very destructive in the case of piercing insulators or other electric elements.

UL101 Electrical Inspector in use

UL101 Electrical Inspector in use

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