Hello Amund Sorry for the late reply on this
Not to rain on your parade any further but the upper operating temperature for Class II is 55 C not 40 C. The note for Clause 7.2 in EN 50131-1 is not correct. Not sure why that has never been fixed but it might be because notes cannot contain requirements. In any case EN 50131-1 points to EN 50130-5 for the actual test conditions. EN 50130-5 Tables 1 and 3 give the high and low test temperatures per environmental class In this case, perhaps Class I would better suit your needs giving an operating range of +5C to 40 C Requirements for temperature range are independent of security grade. Kevin -----Original Message----- From: Brian O'Connell [mailto:oconne...@tamuracorp.com] Sent: Tuesday, April 17, 2018 12:54 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] EN50131-1 Battery spec vs. Environmental class Depends on Security Grade requirements and where the battery is stored. Li batteries can be used in discharge mode to -20C. Have only done one project for this, where the battery temperature was monitored by the charger, and shut down charge current when outside rated temperature range, but allowed discharge to -20C. Brian From: Amund Westin [mailto:am...@westin-emission.no] Sent: Monday, April 16, 2018 11:42 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] EN50131-1 Battery spec vs. Environmental class EN50131-1: Alarm systems - Intrusion and hold-up systems -- Part 1: System requirements >From the standard: Environmental Class II: Indoor General (-10º to +40º) Li-Ion batteries may have this spec: Charging: 0º C to 45º C Discharge/standby: -20ºC to +50º C: As I understand the Li-Ion tech, the batteries should not be charged when temperature is below 0º C and that means it's not possible to qualify for Environmental Class II (-10º to +40º) Indoor General. Unless you monitor the temperature and prevents charging when temperature is under 0º C, but that may lead you into other trouble if temperature remains low over a long period. Any others who has considered the same case and agree? Best regards Amund - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Femc-pstc.html&data=02%7C01%7Ckevin.3.harris%40jci.com%7Cc0a39794c03b470fc91808d5a483eafc%7Ca1f1e2147ded45b681a19e8ae3459641%7C0%7C0%7C636595808842425913&sdata=65cQQRJHzQshZzuatB2%2Fj6lETF4ER%2BjnYO2cHX0APgo%3D&reserved=0 Attachments are not permitted but the IEEE PSES Online Communities site at https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fproduct-compliance.oc.ieee.org%2F&data=02%7C01%7Ckevin.3.harris%40jci.com%7Cc0a39794c03b470fc91808d5a483eafc%7Ca1f1e2147ded45b681a19e8ae3459641%7C0%7C0%7C636595808842425913&sdata=MZ8TV0OZPFlVykiMyVARYmWpE5y5i8UDbseX%2BYfMug4%3D&reserved=0 can be used for graphics (in well-used formats), large files, etc. Website: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2F&data=02%7C01%7Ckevin.3.harris%40jci.com%7Cc0a39794c03b470fc91808d5a483eafc%7Ca1f1e2147ded45b681a19e8ae3459641%7C0%7C0%7C636595808842425913&sdata=v4ddC5%2FhidyqnotTSsHlJrQM20RJ9rICdNbo8PBLwWE%3D&reserved=0 Instructions: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flist.html&data=02%7C01%7Ckevin.3.harris%40jci.com%7Cc0a39794c03b470fc91808d5a483eafc%7Ca1f1e2147ded45b681a19e8ae3459641%7C0%7C0%7C636595808842425913&sdata=NvdSP%2FGMdFRyVmHShKs58ZpUAO9yIanAAVbXmG8nYx0%3D&reserved=0 (including how to unsubscribe) List rules: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.ieee-pses.org%2Flistrules.html&data=02%7C01%7Ckevin.3.harris%40jci.com%7Cc0a39794c03b470fc91808d5a483eafc%7Ca1f1e2147ded45b681a19e8ae3459641%7C0%7C0%7C636595808842425913&sdata=1tiEukKNR1jIkJUQu5Gjs5CHomI4AhOy2l7K3YkWEcI%3D&reserved=0 For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
