from chemistry to pack
Battery packs run on direct current, and that single fact makes their contactors, fuses and connectors behave very differently in a fault than the AC switchgear most electricians train on. The Arcing page touches on why DC arcs are harder to break; this post goes into the physics behind that difference and what it means … Read more
Author: Jim Phillips, P.E Introduction At present, no consensus standard provides a validated methodology for calculating direct current (dc) arc-flash incident energy. IEEE 1584-2018, IEEE Guide for Performing Arc-Flash Hazard Calculations, is limited to alternating current (ac) systems and does not address dc arc-flash. NFPA 70E includes personal protective equipment (PPE) category tables applicable to certain … Read more