- Resource Library
Corona can occur in switchgear 2000V or greater, which could potentially lead to flashover, especially in enclosed switchgear, causing enormous damage and personal injury. This results from ionized air or ozone caused by damaged insulation, contamination, and faulty design. The byproducts of corona, nitric acid, and carbon cause a continuous decay of insulation, making the situation highly unpredictable. With ultrasound inspection, corona can be detected and remedied before serious results occur.
What types of problems will an ultrasound inspection detect?
Arcing occurs in all voltages. All forms, including tracking, affect the quality of power. In addition, arcing through air or through bulk insulation destroys electrical power equipment.
Occurs through damaged insulation material when conductors of 1000V or more begin to ionize the air, forming ozone (O3). Ozone will conduct current and can form a direct path to ground, resulting in catastrophic results, especially in enclosed switchgear. Corona also produces nitrogen exides, which form nitric acid when combined with moisture. This acid further destroys the insulating material as well as metal components, causing possible thermal problems.
Often referred to as “baby arcing,” tracking follows the path of damaged or dirty insulation across component surfaces. Tracking occurs most often in medium to high voltage equipment (1-kV or greater)
Occurs inside electrical components such as transformers and insulated bus bars. It is affected by and causes insulation deterioration.
Can be indicative of serious problems in some electrical systems such as transformer coils.
Infrared imaging offers a tool to detect and accurately map subsurface roof moisture. Under the right conditions, infrared surveys can assess every square inch of roof surface.
As the entire roof begins to cool after sunset, areas with trapped subsurface moisture will retain the sun’s heat longer than normal dry areas. These abnormal areas are depicted as warmer areas on the viewing screen of infrared imaging equipment. Moisture readings of these areas provide a quantitative indication of those moisture levels.
Thermograms, conventional photographs, and a roof plan documenting the location of wet areas can be provided in a comprehensive report. Based on this, management can make informed decisions regarding roof repair or replacement.
Infrared imaging offers greater potential for detecting and accurately mapping subsurface roof moisture than other non-destructive testing methods.
The survey data is documented in a written report, which includes thermograms and conventional photos of the wet areas, a quantitative indication of the moisture level, and a roof plan documenting the location of the wet areas.
In any building, the insulation, outer walls, roof, doors, windows, and floor must all work together to control airflow in and out of the structure, repel moisture, and prevent heat loss or gain. The exterior of the building, or the envelope, needs to be able to absorb the energy difference between the inside and outside. Failure of any of the components will significantly reduce the overall performance.
Our infrared building envelope heat loss inspection scans all accessible exterior areas and the entire roof of your facility to locate areas with defective insulation. During the inspection, our technicians will mark problematic areas with spray paint. Armed with this information, you will be able to determine which, if any, components are hurting your facility’s performance.
For an additional cost, we can also:
An important application of infrared testing is the inspection of insulated process vessels, boilers, and heaters, such as those used in the petrochemical industry. These vessels are lined with refractory insulation to protect the metal skin from the high temperatures and caustic properties of the product.
Over time, this insulation deteriorates and must be replaced. An infrared inspection of the exterior surface of the vessel permits thermal mapping of the unit. Temperatures are verified with a surface temperature probe allowing for differences in emissivity.
We provide you with the information necessary to accurately schedule shutdowns so that faulty components can be repaired before they cause severe damage or injury due to failure.
The insulation inside boilers, heaters, and ovens will also deteriorate over time. To operate these units safely and cost-effectively, an infrared inspection should be performed on an annual basis. The information provided from an infrared inspection, along with other PM tools, will help you maintain your equipment in top condition.
Solar power installations reduce environmental impacts from fossil fuel power generation due to their low air emission of pollutants and greenhouse gasses during operation. When photovoltaic systems (PV systems or solar panels) operate at an optimal level, they are a great source of clean energy.
Over time, solar panels may develop defects, which can affect functionality and become a safety hazard. A regular infrared inspection of your rooftop solar panel system is a safe and effective way to check for defects and potential fire hazards before they become a safety or production problem. We have identified three applications for conducting a non-invasive, non-destructive infrared inspection of solar panel systems.
All applications include a report containing thermographic (infrared) and conventional photo documentation of the solar panel system. Any defects found are outlined and notated on an aerial view map (if applicable) as well as documented in a spreadsheet format.
At your request, we can perform an infrared inspection of the electrical equipment associated with your solar panel installation (breakers, inverters, combiner boxes, etc.). Documentation will include: thermographic (infrared) and conventional photos, temperatures, a list of equipment inspected, and analysis (where appropriate) in a PDF report. Photo documentation will be provided only for problems found.