Significance of Arc Flash Risk Evaluation and Mitigation Techniques - Carelabs Malaysia

Arc flash risk evaluation matters because incident energy — the amount of thermal energy released in an arc flash event — determines how severe an injury can be at a given working point, and that number is different at every panel in a facility. Evaluating it, rather than assuming a blanket risk level, is what allows a facility to assign the right PPE category instead of over- or under-protecting workers.

Mitigation follows from the evaluation, not before it: once incident energy is known at each point (calculated using the IEEE 1584 method and ETAP modelling), options include adjusting protective device settings to reduce clearing time, improving arc flash boundaries through equipment changes, and specifying the correct PPE category for each task. In Malaysia, this work is typically carried out in line with MS IEC 60364 and under the general duties set by the Occupational Safety and Health Act 1994, enforced by DOSH.