How to design electrical systems to reduce arc flash incident energy
Existing arc flash codes and standards like IEEE 1584 and 1584.1 present models that electrical engineers can use to estimate incident energy levels in power distribution equipment, but they provide limited direction regarding how equipment construction should be considered in the calculations. The NFPA 70E hierarchy of risk control describes that the most effective ways are designing/specifying to remove the hazard at its source, minimize the severity of hazard and blocking the hazard from affecting employees.
This presentation will introduce the “safety by design” approach for arc flash incident energy mitigation and review current practices regarding arc flash evaluation in barriered and non-barriered power distribution equipment based on current codes and standards.
A case study of a new system that provides passive protection in low-voltage distribution equipment will be presented. By providing improved protection for the incoming conductors and main breaker, this line-side protection system uses reliable high-order engineering controls to effectively mitigate risk for electrical workers.
The comparison of the new line-side protection system and traditional arc-resistant equipment will be introduced, focusing on the benefits of mitigating arcing faults in equipment design over containing them. The practical benefits of such equipment with this new technology also will be discussed.
- Learn about the various levels of electrical hazards and current methods of specifying electrical protection for employees and equipment.
- Discover new ways of reducing the likelihood of arc flash events, as well as controlling and extinguishing arc flash energy when it occurs in low voltage motor control centers and switchboards.
- See a documented example of pre-ArcBlok arc event in a standard MCC and compare an arc event with the same electrical energy in an MCC outfitted with ArcBlok line side arc isolation technology.
- Explore other new technologies, such as onboard wireless thermal monitoring and absence of voltage testers (AVT), which help reduce or mitigate arc flash events before they occur.
Erhan Cokal, P.E., Offer Marketing & Launch Leader, Schneider Electric
Dakota Blair, EcoStruxure Power Business Development Specialist, Schneider Electric
Rod West, Senior Staff Engineer, Schneider Electric
Amara Rozgus, Content Manager, CFE Media, LLC