AlphaCell SMU Technical Manual AlphaCell SMU Effective: January 2007 Alpha Technologies
Power Alpha Technologies ®
AlphaCell SMU Technical Manual 745-680-B9-001, Rev. A Effective Date: January, 2007 Copyright© 2007 Alpha Technologies, Inc. member of The GroupTM NOTE: Photographs contained in this manual are for illustrative purposes only. These photographs may not match your installation. NOTE: Operator is cautioned to review the drawings and illustrations contained in this manual before proceeding.
Table of Contents Safety Notes .......................................................................................................................... 6 Battery Safety Notes.............................................................................................................. 7 Chemical Hazards ................................................................................................................. 7 Recycling and Disposal Instructions ......................................................
Figures Fig. 3-1, Battery Construction ................................................................................................ 8 Fig. 4-1, Capacity as a Function of Temperature................................................................. 10 Fig. 8-2, Battery Connector Detail ....................................................................................... 15 Fig. 8-1, Frame Construction ............................................................................................... 15 Fig.
Safety Notes Review the drawings and illustrations contained in this manual before proceeding. If there are any questions regarding the safe installation or operation of this product, contact Alpha Technologies or the nearest Alpha representative. Save this document for future reference. To reduce the risk of injury or death, and to ensure the continued safe operation of this product, the following symbols have been placed throughout this manual. Where these symbols appear, use extra care and attention.
Battery Safety Notes WARNING! Lead-acid batteries contain dangerous voltages, currents and corrosive material. Battery installation, maintenance, service and replacement must be performed only by authorized personnel. Chemical Hazards Any gelled or liquid leakage from a valve-regulated lead-acid (VRLA) battery contains dilute sulfuric acid, which is harmful to the skin and eyes. Emissions are electrolytic, electrically conductive, and corrosive.
1.0 Introduction The AlphaCell SMU battery with sealed gas recombination technology is specifically designed for telecommunication applications, and is available with capacities from 200Ah to 2,000Ah. The AlphaCell SMU Series of batteries require less space than conventional VRLA batteries and are structurally arranged to eliminate dislodging and slippage caused by vibrations over time. Features and Benefits: • 10+ year life • Recombination efficiency approaching 99.
3.0 Specifications, continued 3.1 General Specifications Model Rated Voltage SMU 2200-FR Rated Capacity (Ah) Dimensions (in/mm) Height Number of Poles Weight (lb./Kg) 8/200 15/385 2 35/16 6/161 8/200 15/385 2 50/23 220 8/201 8/200 15/385 2 66/30 375 275 9.5/242 8/200 15/385 2 84/38 600 450 330 11/283 8/200 15/385 4 99/45 2 800 600 440 7/183 9.5/244 24.5/629 4 136/62 SMU 21000-FR 2 1000 750 550 8.5/218 9.5/244 24.
4.0 Temperature, Battery Capacity, and Battery Life There are several factors that affect the capacity and the life-span of a battery. These include charging method, discharge depth, end voltages, and ambient temperature. The most significant of these is temperature. In order to maximize capacity and life-span, ambient temperature should be controlled and the battery’s float voltage should be set to the appropriate value (for float voltage specifications see section 5.1).
4.0 Temperature, Battery Capacity, and Battery Life, continued 4.2 Battery Life and Ambient Temperature The expectant life-span of 10+ years is based on a 25°C ambient temperature. Temperatures above this optimum increase the rate of plate corrosion and of water loss, which shortens battery life.
5.0 Charging, continued 5.2 Boost Charging NOTE: • • In general a boost charge should not take more than three hours. If it does, either the batteries or the charger are likely defective. Take and record measurements before and after charging and during discharge to help track changes and problems. Wait two hours after charging before you take final measurements so the electrolyte can cool sufficiently.
6.0 Maintenance, continued 6.2 6.3 6.4 Quarterly Maintenance • Repeat monthly inspection. • Measure and record the floating voltage of every cell. If more than two cells’ voltages are less than 2.18V, the batteries need to be boost charged (see Section 5.2). If the problem persists, conduct annual and then three-year maintenance. Yearly Maintenance • Repeat quarterly maintenance and inspection. • Ensure all connections are clean and tight.
8.0 Installation About the site: • Maintain a distance of at least 20" (508mm) between the battery and electrical switches and outlets. • Do not expose the battery to organic solvents and corrosive gasses. • Maintain a distance of at least 7.87" (200mm) between batteries and battery groups to provide proper ventilation. • Create a pathway at least 47.24" (1200mm) wide next to each battery group for access during routine maintenance.
8.0 Installation, continued Cover Plate Plastic Terminal Cover Module 2 Lead Terminal (one of two) Module 1 M8x20 Bolts M8x30 Bolts Channel Bar Fig. 8-1, Frame Construction Positive Lead Terminal Negative Lead Terminal Plastic Terminal Cover 8mm Allen Bolt Washer Connector Terminal Post Fig. 8-2, Battery Connector Detail Fig.
Voltage 9.0 Appendix A, Specifications Time (h) Fig. 9-1, Discharge Performance 2.1 2.0 Voltage 1.9 1.8 1.7 1.6 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Discharge Rate Kch (Kch=Idis/C10) Fig.
9.0 Appendix A: Specifications, continued 2.1 2.0 Voltage 1.9 1.8 1.7 1.6 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 Discharge Rate Kch (Kch= Idis/C10) Fig. 9-3, Discharge Curve at Five Seconds (25°C) 2.3 2.2 2.1 Voltage 2.0 1.9 Float Voltage 1.8 Open Circuit 0.1 C10 0.2 C10 0.3 C10 0.4 C10 0.5 C10 1.7 1.6 1.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Discharge Rate Kch (Kch= Idis/C10) Fig.
9.0 Appendix A: Specifications, continued 2.1 2.0 Voltage 1.9 1.8 0.1 C10 0.2 C10 0.3 C10 0.4 C10 0.5 C10 1.7 1.6 1.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 Discharge Rate Kch (Kch= Idis/C10) Fig. 9-5, Shock Discharge Curves at Different Rates After .5h Discharge (25°C) Charge current of 0.1C10A and a voltage limit of 2.35Vpc (25°C). 2.4 60 1.4 Voltage 1.2 Current 50 2.3 Capacity Charged 2.2 30 Voltage Current 0.8 0.6 2.1 20 0.4 Capacity Charged Rate 1.0 40 2.0 10 0 0.2 1.
Appendix A: Specifications, continued Charge current of 0.1C10A and a voltage limit of 2.23Vpc (25°C). Current 50 1.3 Voltage 1.2 2.2 1.1 1.0 40 Capacity Charged 0.9 0.8 30 2.1 Current Voltage 0.7 20 0.6 0.5 0.4 2.0 10 0.3 Capacity Charged Rate 9.0 0.2 0 0.1 1.9 0 4 8 12 16 0.0 24 20 Time (h) Fig. 9-7, Recharge Characteristics of a 100% discharged SMU-500. End Discharge Voltage 1.
10.0 Appendix B: Choosing the Right Capacity 10.1 Telecom Applications Discharge Time +RXU Discharge Current (A) 0LQXWH Fig. 10-1, Single Cell Discharge Curves (Final Voltage: 1.80 Vpc; 25°C) 10.2 Power Applications 1.1 1.1 1.0 1.0 0.9 0.9 1 2 3 Capacity (C/C10) 0.8 0.7 0.8 0.7 4 0.6 0.6 End Voltage 0.5 0.5 1 1.60 0.4 2 1.70 0.4 0.3 3 1.80 0.3 4 1.90 0.2 0.2 0.1 0.1 0.0 1 Discharge Time (h) 5 0.0 10 Fig.
10.0 Appendix B: Choosing the Right Capacity, continued 10.2 Power Applications, continued 1.3 4 1.2 3 1.1 2 1.0 End Voltage KCh= Idischarge/C 0.9 1 1 1.90 2 1.80 0.8 3 1.70 0.7 4 1.60 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 60 120 180 240 Time (min) 300 360 420 480 Fig.
11.0 Forms Charging Recording Form Record before charging and two hours after Model of Battery Date Battery Bank No. Room Temperature Charging Current Total Battery Voltage Remarks Cell # Voltage Siemans Conductance Rating Notes NOTE: Wait two hours after charging before you take final measurements so the electrolyte can cool sufficiently.
11.0 Forms, continued Discharge Recording Form Model of Battery Date Battery No.
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