Acoustic Ultrasound Solutions for Electrical Inspection
Use airborne and structured-based (A&SB) ultrasound 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. Even from distances up to 300 feet away. Additionally, use the InCTRL platform and InCTRL mobile app to record samples. Also, store testing history, and communicate faults through a management chain. Use InCTRL’s FFT spectral analysis feature to diagnose recorded samples for electrical failures.
Power Transmission and Distribution
Use the UL101 Electrical Inspector and PowerBeam 300 together to inspect medium and high voltage power lines, switchgear, and transformers. Inspection focuses the detection of corona. Corona is a symptom of two types of failures. This includes material degradation and indeterminant by other technologies. The UL101 Electrical Inspector is affordable and effective in all types of environments for these tasks.
“India’s Certified R&D Institute has certified the functional aspects of CTRL UL101 [Electrical Inspector] with the PowerBeam 300 for detection of corona discharge from 400 kV single suspension insulator string consisting of 1 x 25 Nos. of 120 kN B/s discs with arcing horn and corona control ring and 245 kV single suspension insulator string consisting of 1 x 14 Nos. of 120 kN B/s discs with arcing horn and corona control ring. Readings were taken by the UL101 and PowerBeam 300 from 50, 100, and 150 feet respectively.”
How to Inspect Transmission Lines
Scan the Electrical transmission system network such as Insulator or cable string with the CTRL UL101 Electrical Inspector and PowerBeam 300 attachment.
The UL101 Electrical Inspector will pick up the ultrasound signal which is generated at the source due to electrical arcing, tracking, or corona discharge.
If there is a continuous corona effect during transmission near the insulator, it results in transmission losses.
The intensity of the ultrasound will increase as you direct the PowerBeam 300 scan the area, allowing you to pinpoint which insulator is punctured or damaged.
In most of the cases, a punctured insulator or coated insulator produces the high intensity ultrasound rather than emitting heat. Thus ultrasound is very effective in these applications to detect corona/arcing over other methods.
“This method of detection during day time is added advantage over other methods like infrared imaging.”
The PowerBeam 300 is very effective from 66 KV to 440KV Electrical system for finding out the faults with following applications:
How to Inspect Electrical Panels
Safety is the first line of defense. Scan cabinets & MMCs with panels closed. Use the CTRL UL101 Electrical Inspector together with a airborne attachment.
Step 1: Scan with UL101 Electrical Inspector
Listen for arcing and discharge with panels closed.
Step 2: Determine if Arcing Present
Easily hear the arcing sounds from a safe distance
Step 3a: Open Panels with Confidence
Safely open panels with appropriate PPE
Step 3b: De-Energize if Questionable
High levels of ultrasound indicate severe problems