General Information
Battery System General Description
Series string .......................................................................................................................3
Parallel string ......................................................................................................................3
VRLA Battery Safety Concerns
Electrical Hazards ...............................................................................................................4
Disposal ..............................................................................................................................4
Chemical Hazards ...............................................................................................................4
Fire, Explosion and Heat Hazards.......................................................................................4
Handling Hazards ...............................................................................................................5
Preparation for VRLA Battery Periodic Maintenance ...............................................................5
Required Maintenance Tools and Equipment .....................................................................5
Periodic Maintenance Tasks and Schedule ..............................................................................5
Quarterly Checks ................................................................................................................6
Semi-Annual Checks ..........................................................................................................6
Annual Checks ....................................................................................................................6
Bi-Annual Checks ...............................................................................................................6
Data Analysis and Corrective Actions .......................................................................................6
Ambiant and Battery Temperature.......................................................................................7
Battery Visual Inspection ....................................................................................................7
System Float Voltage ..........................................................................................................8
Ground Fault Check ............................................................................................................8
Float Charging Current .......................................................................................................9
Individual Battery Float Voltage ..........................................................................................9
High Rate Momentary Load Test ........................................................................................10
Battery Impedance ..............................................................................................................10
Connection Resistance .......................................................................................................10
Performance Testing ...........................................................................................................11
Tables
Table 1-Battery System Symptoms and Solutions...............................................................12
Table 2-Battery Parameters by Model Number ...................................................................19
Figures
Figure 1-Series String of VRLA Batteries ............................................................................3
Figure 2-Parallel Strings of VRLA Batteries ........................................................................3
Figure 3-Float Current VS. Float Voltage ............................................................................9
Figure 4-VRLA Battery Impedance VS. Capacity ...............................................................10
Appendices
Appendix 1-VRLA Battery Periodic Maintenance Data Recording Form ............................20
Table of Contents
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