Page 212 - Uninterruptible Power Supplies
P. 212

Batteries

                                 Graph of Unit Voltages at Float
            15.00 Volts

            14.50 Volts

            14.00 Volts
            13.50 Volts

            13.00 Volts

            12.50 Volts

            12.00 Volts

            11.50 Volts
            11.00 Volts

            10.50 Volts

            10.00 Volts
                             5       10        15       20       25       30
                        Voltage Measurement
                        Maint/Crit Float Volt Limits
            Figure 7.24 Graph of unit voltages at float.
                               Graph of Unit vs Average Impedance
            6.00 mOhms

            5.80 mOhms

            5.60 mOhms
            5.40 mOhms

            5.20 mOhms

            5.00 mOhms

            4.80 mOhms

            4.60 mOhms
            4.40 mOhms

            4.20 mOhms

            4.00 mOhms
                              5       10       15       20       25       30
                           Impedance Measurement    Max/Min Reading
                           Average Impedance        Maint/Crit Imp Alarm
            Figure 7.25 Graph of unit versus average impedence.
         Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
                    Copyright © 2004 The McGraw-Hill Companies. All rights reserved.
                      Any use is subject to the Terms of Use as given at the website.
   207   208   209   210   211   212   213   214   215   216   217