TO: ALL AT&T INSTALLATION SUPPLIERS



TO: ALL AT&T INSTALLATION SUPPLIERS Date: 03/01/2018EFFECTIVE DATE: 5 days from posted date or as per Supplier’s ContractSubmitter’s Name: Wm. Shane MasonDocument: TP76300 Subject: Charging Storage Batteries Action: Add: FORMCHECKBOX Modification: FORMCHECKBOX Delete: FORMCHECKBOX Section: MSection Title: PowerSubsection: 5Section Title: Charging Storage BatteriesSubsection: 5.2Subsection Title: Float, Equalize, and Initial Freshening Charge VoltagesPrior to Change: 5.2.2 The Installation Supplier shall provide its own portable battery charger equipped with overcurrent protection and the following specifications: Capable of producing a charge rate of at least: 20A for 2000 Ah (3.4Kw) batteries and larger. 12A for 1200 Ah to 1999 Ah (2.0Kw to 3.3Kw) batteries.10A for smaller than 1200 Ah batteries (< 2.0Kw).For VRLA batteries, the charger must be current limited per battery manufacturer requirements.Constant DC voltage regulation with maximum AC ripple voltage output of 0.5%.Post Change: 5.2.2 The Installation Supplier shall provide its own portable battery charger equipped with overcurrent protection and the following specifications: Capable of producing a charge rate of at least: 25A for 3900 Ah (6.5kW) batteries and larger.20A for 2000 Ah to 3899 Ah (3.4Kw to 6.5kW) batteries and larger. 12A for 1200 Ah to 1999 Ah (2.0Kw to 3.3Kw) batteries.10A for smaller than 1200 Ah batteries (< 2.0Kw). For VRLA batteries, the charger must be current limited per battery manufacturer requirements.Constant DC voltage regulation with maximum AC ripple voltage output of 0.5%.Questions relative to this IRCN should be addressed to Serena Kwong at 925-398-0391.Serena KwongSenior Specialist –Technical Process /Quality sk5945@Access the TP's on the Extranet Site - Area Mgr Eng Network QualityImplementation Eng & Common SystemsDate: 02-26-18(Mike Cassidy)Principal-Network Design Engineer (Subject Matter)Date: 02-23-18(Steve Martin)Release Approved Senior Specialist –Technical Process /QualityDate: 03-01-18(Serena Kwong) ................
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