When it comes to interpreting the results of arc flash assessments, you can get overwhelmed at the very least. However, when you break it down, there isn’t much to it. An arc flash assessment is vital for evaluating risks associated with electric equipment, protecting employees, and meeting regulatory requirements. Knowing the parts of the analysis enables you to use this information to increase workplace safety.
Arc flash consists of an abrupt discharge of electrical energy, which can lead to serious injuries or even death. The analysis determines the likelihood of such incidents based on the calculation of potential energy release. This information defines the extent of PPE needed for the workers, and the measures to be taken to enhance safety.
This guide is intended to help you interpret your arc flash analysis results, giving you a clear meaning of the findings. With this awareness, you will be able to prevent risks and keep your team safe at work.
Main Features of Arc Flash Risk Evaluation
a. Incident Energy
Arc flash energy, defined by the incident energy, normally expressed in cal/cm², shows energy during an arc flash. An increase in these values means that the possible incidents will be more serious in nature.
b. Arc Flash Boundary
This describes the proximity to the electrical source at which a person could sustain a second-degree burn in case of an arc flash. The knowledge of this boundary is useful in determining safe working distances and in creating the protective barriers.
c. PPE Category
Depending on the incident energy levels that have been identified, protective measures are grouped into PPE categories. They are numbered from 1 to 4: Category 1, Category 2, Category 3 and Category 4, where Category 4 is considered as the most hazardous. The energy with which incidents occur determines the level of PPE required.
How to Proceed When Interpreting Results
a. Review Incident Energy Levels
The first step is to determine the incident energy levels for various sections of your electrical system. Choose locations where incident energy is high and focus on enhancing the conditions for safety there.
b. Determine Arc Flash Boundaries
Check each of the component’s arc flash boundaries. Make certain all people involved are informed of restrictions that include avoiding contact with these electrical equipment at close range.
c. Assess PPE Requirements
Ensure that you look at the PPE categories given to various areas. Make sure that your team has access to the right PPE and that they know how to use it correctly.
Implementing Safety Measures
a. Labeling
Ensure that all electrical equipment is properly marked with the arc flash boundaries, the level of incident energy, and the appropriate PPE. This makes it easier for the workers to recognize dangers and avoid or minimize potential risks.
b. Training
Hold team meetings frequently to explain the risks of arc flash, how to read the analysis, and the use of correct personal protective equipment.
c. Maintenance
Ensure your electrical systems are well maintained and up to date, and also your arc flash analysis. It is important to remain up to date as changes in the system may alter the energy levels of an incident.