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Summary of Contents for Alpha AlphaCell SMU-HR Series
- Page 1 AlphaCell SMU-HR Series Batteries Technical Manual Effective: July 2010...
- Page 3 Alpha representative. NOTE: Alpha shall not be held liable for any damage or injury involving its enclosures, power supplies, generators, batteries, or other hardware if used or operated in any manner or subject to any condition not consistent with its intended purpose, or is installed or operated in an unapproved manner, or improperly maintained.
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Page 4: Table Of Contents
Table of Contents Safety Notes .......................... 6 Introduction ......................... 8 Features ......................8 Typical Electrical and Mechanical Specifications ..........9 Operating Conditions ..................9 Capacity ......................9 Temperature and Battery Life................. 10 Internal Resistance and Short-circuit Current ..........10 Charging Procedures ....................11 Float Charge ....................11 Recharge Following Discharge .............. - Page 5 Figures Fig. 1-1, Available Capacity vs. Ambient Temperature ............9 Fig. 2-1, Recharge Time and Capacity Restored as Function of Current Limit ....13 Fig. 3-1, Capacity vs. Storage Time ..................14 Fig. 4-1, VRLA Battery Regular Maintenance Record ............16 Tables Table 1-1, General Electrical and Mechanical Specifications by Model ........
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Page 6: Safety Notes
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 the system, contact Alpha Technologies or the nearest Alpha representative. Save this document for future reference. - Page 7 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.
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Page 8: Introduction
The SMU-HR series of Valve Regulated Lead Acid (VRLA) batteries is designed to meet the needs of many industrial and utility applications. The success of the AlphaCell SMU-HR series is due to a product design purpose-built for the needs of critical backup requirements, and an industry-leading manufacturing technology which delivers product consistency. -
Page 9: Operating Conditions
Introduction, continued Operating Conditions Because SMU-HR batteries, which are valve regulated and virtually sealed, do not give off perceptible amounts of gas under normal operating conditions, they can be installed in the same environment where people live and work. • Acceptable ambient operating temperature: -40ºF to 131ºF (-40ºC to 55ºC) •... -
Page 10: Temperature And Battery Life
Introduction, continued Temperature and Battery Life High temperatures can harm the battery and reduce its lifespan. Battery life decreases by 50% every per 15ºF (~ 9ºC) above the standard operating temperature of 77ºF (25ºC). To minimize battery damage: • Use temperature compensated chargers. •... -
Page 11: Charging Procedures
2.0 Charging Procedures NOTE: Refer to your particular charger’s manual for specific instructions regarding charger setup and operation. During operation, verify batteries are: • Float-charged in order to maintain a fully charged condition during the standby period. • Completely recharged after a discharge. Recharge as soon as possible to ensure maximum protection against subsequent power outages. -
Page 12: Recharge Following Discharge
2.1 Float Charge, continued Float Current The normal float current observed in fully charged SMU-HR batteries at 2.27Vpc at a temperature of 68F (20C) is approximately 30mA per 100Ah. Because of the nature of recombination phenomena, the float current observed in SMU-HR batteries is normally higher than that of vented batteries and is not an indication of the state of charge of the batteries. -
Page 13: Storage
2.2 Recharge Following Discharge, continued Using a current limit of 0.1 C10, it takes approximately 9 hours to restore 80% of the discharge, and 11 hours to restore 90%. This can be compared to a current limit of 0.25 C10, whereby 80% is returned in approximately 4 hours, and 90% within 5 hours. -
Page 14: Fig. 3-1, Capacity Vs. Storage Time
Storage, continued All lead acid batteries experience self-discharge while in open circuit storage. This causes circuit voltage and capacity to decrease (see Fig. 3-1). During storage please note: • The self-discharge rate is related to ambient temperature. The lower the temperature, the less the discharge. -
Page 15: Maintenance
13.0V after temperature adjustment, discharge the battery and then recharge at the float rate. If the problem still exists, conduct yearly or three-year maintenance procedures. If the problem persists, please contact Alpha Technologies. -
Page 16: Fig. 4-1, Vrla Battery Regular Maintenance Record
Maintenance, continued Type: Place: Test Status: Qty: Total Voltage (V): Room Temperature: Current (A): Voltage (V) Voltage (V) Visual check: Fig. 4-1, VRLA Battery Regular Maintenance Record 745-680-B2-002, Rev. B... -
Page 17: Discharge Specifications
5.0 Discharge Specifications Discharge Data with Constant Current Amperage values for each battery model as a function of time and voltage @ 77°F/25°C. SMU-HR 12-9 End voltage 5Min 10Min 15Min 30Min 1.60V 41.4 25.7 19.4 11.8 5.69 2.50 1.53 0.83 0.48 1.67V 38.8 24.4... - Page 18 Discharge Data with Constant Current, continued SMU-HR 12-75 End voltage 5Min 10Min 15Min 30Min 1.60V 77.0 49.5 23.3 14.8 7.50 3.83 1.67V 76.0 49.2 23.1 14.7 7.40 3.80 1.70V 76.0 49.2 23.0 14.6 7.40 3.78 1.75V 76.0 49.0 23.0 14.4 7.30 3.75 1.80V...
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Page 19: Discharge Data With Constant Power
Discharge Data with Constant Power Wattage values for each battery model as a function of time and voltage with constant Watts per cell @ 77°F/25°C. SMU-HR 12-9 End voltage 5Min 10Min 15Min 30Min 1.60V 72.6 46.5 35.4 21.3 10.3 4.43 2.58 1.71 0.95... - Page 20 Discharge Data with Constant Power, continued SMU-HR 12-75 End voltage 5Min 10Min 15Min 30Min 1.60V 49.7 33.3 16.2 7.91 1.67V 46.3 32.0 16.0 7.88 1.70V 45.7 31.3 15.8 7.88 1.75V 45.0 30.8 15.8 7.84 1.80V 43.3 30.0 15.7 7.56 1.85V 42.5 28.7 15.0...
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Page 21: Forms
6.0 Forms Discharge Recording Form Model of Battery Date Battery Bank No. Room Temperature Charging Current Total battery Voltage Remarks Cell Voltage at Time Period End Cell # Inital Voltage 15min 30min 4:30hr 5 hr 745-680-B2-002, Rev. B... - Page 23 Fax: +55 11 2476 0150 Visit us at www.alpha.com Due to continuing product development, Alpha Technologies reserves the right to change specifications without notice. Copyright © 2010 Alpha Technologies. All Rights Reserved. Alpha® is a registered trademark of Alpha Technologies. 745-680-B2-002 Rev. B (07/2010)
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