Arc Flash Hazard Analysis / Risk Assessment

  1. What are the steps involved in Arc Flash Analysis? A. Arc Flash Hazard Analysis or Risk Assessment is a study conducted by trained safety experts to analyze electric equipment and power systems in order to predict the amount of incident energy from an arc flash. According to IEEE std 1584, there are 9 steps involved in this Arc Flash Analysis, which we are going to discuss here. Step 1: Collect the system’s installation data: The largest effort in an arc-flash hazard study is collecting the data from the site. Start by reviewing the one-line diagrams and electric equipment, site, and layout arrangement with people who are familiar with the site. The diagrams have to be updated to show the current system configuration and orientation before the arc-flash study starts. The one-line diagrams must have all alternate feeds. If SLDs are not ready, prepare them.              Once the diagrams are completed in the basic electric system scheme, enter  the data needed for the short

What is Infrared Thermography?

Infrared Thermography is a scientific method or a process which senses infrared energy emitted from equipment, converts into temperature and gives the thermal image of the equipment. “Infrared” refers invisible radiant energy. “Thermography” refers to a method of analyzing heat or thermal energy coming out of a body.

Few Important Aspects to note About Infrared Thermography
  • It is invisible since its wavelength is longer than visible light
  • Naturally emitted from an object's temperature is absolute zero(0K) or higher
  • It has a characteristic of heating an object. Therefore, it is sometimes called a "heat wave".
  • It is a kind of light (electromagnetic wave) It can be transmitted through a vacuum
Special Features:

Infrared thermography services are provided by using Infrared thermal imaging cameras. The thermal imaging camera has a special lens which detects infrared light (heat) emitted by all objects. This focused light is scanned by a phased array of infrared detector elements. Temperature distribution image data of infrared thermography consists of a matrix of pixels (number of detectors: for example, 320 horizontal X 240 vertical pixels). Thermal image data can be transferred to PC. Subsequently, the data can be calculated and utilized freely. Thermal image data is colored up pixel by pixel based on temperature.

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