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2.1.4.3 Hazard Event 3:Failure of a Required Protection System <br />NFPA 855 specifies that HMA describe the impact of a failure of a required protection <br />system including,but not limited to,ventilation (HVAC),exhaust ventilation,smoke <br />detection,fire detection,fire suppression,or gas detection system. <br />Failure of a Required Ventilation,Exhaust System or Gas Detection System. <br />Lithium-ion batteries do not release flammable gas during normal operations.For these <br />reasons the Ericsson Energy Storage System 6160 including the Ericsson Enclosure B160 do <br />not require or utilize a ventilation,exhaust,or gas detection system. <br />Failure of a Required Fire Suppression System. <br />The Ericsson Energy Storage System 6160 and the Ericsson Enclosure B160 do not rely on a <br />fire suppression system,either manual or automatic,for fire containment.As demonstrated <br />via the UL 9540A testing,fire is not expected to propagate beyond the initiating module <br />within the B160.No propagation of heat from the initiating unit to adjacent modules <br />reached levels capable of initiating cell venting or thermal runaway.The testing <br />demonstrated fire will be contained in the B160 enclosure of origin. <br />remote 24/7 Network Operations Center (NOC), <br />alerting the system owner of a potential fire within the <br />enclosure. <br />Deflagration Protection UL 9540A testing has demonstrated that generation <br />of a combustible mixture of vented gasses is not likely <br />in accordance with NFPA68/69.The B160 enclosure <br />contains a panel of pressure valves and fans to release <br />pressure by venting the gases of a battery cell or cells <br />as seen in UL9540A testing. <br />Emergency Response Plan <br />Training <br />In many cases,an Emergency Response Plan will be in <br />place to provide direction to building personnel or <br />responders on how to safely evacuate a site in the <br />event of a thermal runaway event.To be added by <br />customer. <br />Fire Service Response Even though the spread of fire by cascading thermal <br />runaway was shown to be unlikely via UL 9540A <br />testing,in the event of fire,fire service response is <br />beneficial.As the installation locations of cellular <br />communications equipment are generally in populated <br />areas,timely response and site access by fire services <br />are anticipated. <br />Confidentiality Class External Confidentiality Label Document Type Page <br />Ericsson Internal Analysis 19 (27) <br />Prepared By (Subject Responsible)Approved By (Document Responsible)Checked <br />ERATLEN Thomas Lennholm <br />Document Number Revision Date Reference <br />1785-BFM 107 220/1 Uen PA2 2025-06-03