WIRE Consultancy experts conduct the Arc Flash Risk Assessment and Relay Coordination based on the system design using the Single Line Diagrams (SLDs) and data collected at the site. The assessment is done with reference of the national and international standards such as NFPA 70E, OSHA 29.CFR.1910, IEEE 1584 & National electrical code.
WIRE Team comprises of chartered engineers, professionals and competent electrical personals to understand the electrical system; analyse the risk associated with the system and conduct the study efficiently.
ABOUT THE SERVICE
A short circuit in an electrical network between two live conductors (direct or indirect contact), leads to huge fault in the electric network. This fault will generate an electric arc through the air gap between two conductors carrying certain incident energy. This energy can lead to severe burns to people in the proximity of the arc flash.
The Arc flash study is performed to identify the fault, analyse the risk and mitigate the hazards of arc flash in electrical network which is known as the Arc Flash Risk Assessment or Arc Flash Hazard Analysis. It aims to protect the employees from electric arc flash at the premise.
Arc Flash Assessment is used to determine worst case arc flash energy levels by considering the worst case scenarios and the assessment identifies and analyses high risk arc flash areas in electrical power system.
Objective of the study
Following are the major objectives while doing the arc flash risk assessment.
Calculate the Short Circuit levels throughout the system and evaluate each equipment fault rating at each study bus.
Determine optimal settings and changes for reduction of incident energies at the panels/buses wherever necessary.
Compile the Arc flash risk assessment at each study location. Make corrections to system coordination and provide corrective action recommendations to ensure the least amount of arc flash risk exists.
Flow of Arc flash study
The flow of the arc flash risk assessment will be within the NFPA and IEEE 1584 guidelines. The process of the arc flash study will be:
Load flow analysis
Short circuit analysis
Protective device coordination
Arc flash analysis & recommendations
Arc flash hazard label generation
Standards & Software used
We at WIRE, use the tested and proven software ETAP and DIGSILENT to perform load flow analysis, short circuit study, relay coordination study, and arc flash study. These assessments meet the new regulation noted on NFPA 70E-2018, IEEE 1584, NESC (National electric safety codes), OSHA.