Fort Belvoir Bldg 2310 Battery Report.pdf
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About this file
This is a maintenance inspection report for uninterruptible power supply (UPS) systems at Fort Belvoir, Virginia, conducted by Chesapeake Mission Critical on June 19-20, 2024.
The report documents the condition of two Eaton 9395-550 UPS units (500 KVA each) located in Building 2310, Room 134, installed on December 19, 2023. Each UPS is supported by four battery cabinets containing Enersys DataSafe 12HX540-FR batteries (40 units per cabinet, 160 units total per UPS). UPS #1 carries a load of 134.2 KVA/153.4 KW at 0.96 power factor, while UPS #2 carries 136.6 KVA/135.8 KW at 0.99 power factor. All batteries are monitored using CellWatch systems and connected with 1/0 AWG cables to 300A battery disconnects. Overall voltages ranged from 544.2 to 554.3 VDC across the cabinets, with AC ripple levels between 0.45 and 0.84 VAC.
Findings indicate that batteries in both UPS units are operating within acceptable tolerance. All electrical connections were re-torqued to manufacturer specifications. UPS #1 Cabinet #3 requires monitoring of Battery #38, which exhibited higher-than-average voltage, and UPS #1 Cabinet #4 requires monitoring of Battery #27, which exhibited lower-than-average voltage. UPS #2 showed all batteries within tolerance across all four cabinets with no corrective action recommended. The detailed inspection data includes individual cell voltages and internal resistance measurements for all 1,280 battery cells (640 per UPS), with accompanying graphical representations showing consistent performance across each battery string.
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Chesapeake Mission Critical RE: Fort Belvoir 8575 John J. Kingman Road Fort Belvoir, VA 22060
On June 19 & 20, 2024 we performed a maintenance inspection on batteries associated with (2) UPS’. The following is our report with our findings and recommendations.
Location Bldg #2310 Rm #134 Equipment UPS # 1 (500KVA) Manufacturer Eaton System 9395 Model 9395-550 Part #/Config # CC50136160010R5 Serial # EH412BAA10 Load 134.2KVA / 153.4KW /.96PF Batteries Cab #1 Cab #2 Cab #3 Cab #4 Manufacturer Enersys Enersys Enersys Enersys Model DataSafe
12HX540-FR
DataSafe
12HX540-FR
DataSafe
12HX540-FR
DataSafe
12HX540-FR
Date Code 11 / 2023 11 / 2023 11 / 2023 11 / 2023 Installed 12 / 19 / 2023 12 / 19 / 2023 12 / 19 / 2023 12 / 19 / 2023 # Of Units 40 40 40 40 Overall Voltage 553.7VDC 553.5VDC 553.4VDC 553.4VDC AC Ripple .690VAC .730VAC .640VAC .840VAC Pos to Grd 186.8VDC 186.3VDC 186.3VDC 186.4VDC Neg to Grd 367.0VDC 367.2VDC 367.3VDC 367.2VDC
I DC 1.1A 1.6A 1.5A 1.0A
I AC .5A .5A .5A .3A
Ambient Temp 67F 66F 65F 67F Neg Post Temp 66F-69F 65F-67F 65F-66F 66F-68F Batt Disconnect 300A 300A 300A 300A Cables 1/0 awg 1/0 awg 1/0 awg 1/0 awg Monitoring CellWatch CellWatch CellWatch CellWatch
Results & Recommendations:
Cab #1- Upon inspection all batteries were within tolerance. All connections were re-torqued to manufacturers specification. We are not recommending corrective action at this time.
Cab #2- Upon inspection all batteries were within tolerance. All connections were re-torqued to manufacturers specification. We are not recommending corrective action at this time.
Cab #3- Upon inspection Batt #38 had a higher-than-average voltage. All other readings were within tolerance. All connections were re-torqued to manufacturers specification. We would monitor Batt #38 for any significant changes.
Cab #4- Upon inspection Batt #27 had a lower-than-average voltage. All other readings were within tolerance. All connections were re-torqued to manufacturers specification. We would monitor Batt #27 for any significant changes.
Location Bldg #2310 Rm #134 Equipment UPS # 2 (500KVA) Manufacturer Eaton System 9395 Model 9395-550 Part #/Config # CC50136160010R5 Serial # EH412BAA09 Load 136.6KVA / 135.8KW /.99PF Batteries Cab #1 Cab #2 Cab #3 Cab #4 Manufacturer Enersys Enersys Enersys Enersys Model DataSafe
12HX540-FR
DataSafe
12HX540-FR
DataSafe
12HX540-FR
DataSafe
12HX540-FR
Date Code 11 / 2023 11 / 2023 11 / 2023 11 / 2023 Installed 12 / 19 / 2023 12 / 19 / 2023 12 / 19 / 2023 12 / 19 / 2023 # Of Units 40 40 40 40 Overall Voltage 554.2VDC 554.2VDC 544.2VDC 544.5VDC AC Ripple .680VAC .760VAC .450VAC .710VAC Pos to Grd 186.2VDC 186.3VDC 186.6VDC 186.1VDC Neg to Grd 367.8VDC 367.8VDC 367.7VDC 367.8VDC
I DC 1.5A 1.1A 1.0A 1.2A
I AC .5A .4A .5A .4A
Ambient Temp 66F 65F 66F 66F Neg Post Temp 65F-67F 64F-65F 65F-67F 65F-67F Batt Disconnect 300A 300A 300A 300A Cables 1/0 awg 1/0 awg 1/0 awg 1/0 awg Monitoring CellWatch CellWatch CellWatch CellWatch
Results & Recommendations:
Cab #1- Upon inspection all batteries were within tolerance. All connections were re-torqued to manufacturers specification. We are not recommending corrective action at this time.
Cab #2- Upon inspection all batteries were within tolerance. All connections were re-torqued to manufacturers specification. We are not recommending corrective action at this time.
Cab #3- Upon inspection all batteries were within tolerance. All connections were re-torqued to manufacturers specification. We are not recommending corrective action at this time.
Cab #4- Upon inspection all batteries were within tolerance. All connections were re-torqued to manufacturers specification. We are not recommending corrective action at this time.
Upon review, if you have any questions or if we can be of further assistance, please contact us.
Thank you, Jeffrey M. Owens
Fort Belvoir
Location Name: Bldg #2310 Fort Belvoir, VA Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #1 Cab #1
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 554.0
1 13.773 2812 2 13.777 2766 3 13.786 2819 4 13.822 2808 5 13.854 2779 6 13.895 2805 7 13.907 2940 8 13.907 2888 9 13.797 3010
10 13.864 2908 11 13.882 2868 12 13.873 2928 13 13.796 3107 14 13.840 2824 15 13.853 2835 16 13.865 2753 17 13.870 2838 18 13.863 2790 19 13.910 2763 20 13.871 2836 21 13.859 3068 22 13.868 3073 23 13.874 2795 24 13.860 2842 25 13.847 2920 26 13.846 3132 27 13.837 3193 28 13.854 2868 29 13.803 2750 30 13.890 2867 31 13.879 2831 32 13.886 2820 33 13.832 2879 34 13.793 2764 35 13.849 3000 36 13.902 2698 37 13.793 2879 38 13.827 2828 39 13.847 2837 40 13.856 2823
Summary: High
Avg
Low
13.910 3193
13.850 2874
13.773 2698
1Page
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #1 Cab #1 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note***** All connections were re-torqued to manufacturers specifications.
2Page
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #1 Cab #2
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 553.8
1 13.813 2825 2 13.840 2831 3 13.827 2795 4 13.819 2951 5 13.907 2827 6 13.853 2824 7 13.902 2778 8 13.907 2812 9 13.909 2860
10 13.882 2845 11 13.920 2853 12 13.910 2821 13 13.869 2912 14 13.904 3047 15 13.854 2795 16 13.877 2824 17 13.716 2912 18 13.713 2872 19 13.694 2844 20 13.697 3083 21 13.824 2764 22 13.875 3211 23 13.907 3179 24 13.904 3042 25 13.795 2722 26 13.768 3168 27 13.818 2897 28 13.741 2713 29 13.875 2695 30 13.937 2844 31 13.871 2827 32 13.923 2723 33 13.832 3164 34 13.879 2841 35 13.921 3037 36 13.893 3099 37 13.826 2876 38 13.835 2770 39 13.840 2931 40 13.745 2764
Summary: High
Avg
Low
13.937 3211
13.846 2889
13.694 2695
String Name: UPS #1 Cab #2 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note*****
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #1 Cab #3
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 553.5
1 13.904 2944 2 13.857 3205 3 13.887 2902 4 13.925 2852 5 13.787 3014 6 13.754 3123 7 13.769 3372 8 13.843 2901 9 13.753 2940
10 13.801 2872 11 13.823 3079 12 13.768 3068 13 13.850 3038 14 13.918 2992 15 13.912 2828 16 13.868 3016 17 13.695 2959 18 13.861 2876 19 13.883 2866 20 13.861 3154 21 13.854 2920 22 13.883 3016 23 13.897 2927 24 13.892 3357 25 13.813 3193 26 13.766 3106 27 13.868 3271 28 13.806 2896 29 13.792 2821 30 13.843 2894 31 13.859 3264 32 13.860 3277 33 13.768 2861 34 13.766 2841 35 13.796 3301 36 13.831 2918 37 13.763 2863 38 14.054 2731 39 13.832 3188 40 13.824 3220
Summary: High
Avg
Low
14.054 3372
13.837 3022
13.695 2731
String Name: UPS #1 Cab #3 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note*****
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #1 Cab #4
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 553.9
1 13.843 2691 2 13.853 2721 3 13.857 2775 4 13.843 2972 5 13.837 2998 6 13.821 3437 7 13.810 2914 8 13.817 2876 9 13.849 2864
10 13.857 3146 11 13.842 3256 12 13.840 3084 13 13.839 2851 14 13.855 3160 15 13.858 3101 16 13.846 3187 17 13.887 3125 18 13.889 3234 19 13.865 2960 20 13.868 3271 21 13.858 2809 22 13.830 2867 23 13.830 2897 24 13.821 3240 25 13.835 3124 26 13.849 2796 27 13.587 3448 28 13.784 2806 29 13.854 2784 30 13.878 2950 31 13.854 2831 32 13.872 2854 33 13.868 3018 34 13.860 2967 35 13.870 3197 36 13.881 2876 37 13.878 2886 38 13.893 3205 39 13.890 2975 40 13.892 2964
Summary: High
Avg
Low
13.893 3448
13.847 3003
13.587 2691
String Name: UPS #1 Cab #4 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note*****
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #2 Cab #1
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 554.2
1 13.856 2861 2 13.875 2825 3 13.911 2935 4 13.959 2834 5 13.778 2847 6 13.806 2849 7 13.798 2860 8 13.823 2827 9 13.831 2854
10 13.904 2958 11 13.886 2850 12 13.904 2857 13 13.823 2839 14 13.823 2862 15 13.854 2778 16 13.849 2846 17 13.873 2943 18 13.894 3001 19 13.929 2925 20 13.936 2890 21 13.809 2822 22 13.759 2856 23 13.783 2916 24 13.815 2936 25 13.783 2878 26 13.786 2861 27 13.778 2863 28 13.812 2912 29 13.868 2993 30 13.912 3133 31 13.884 2865 32 13.921 2854 33 13.836 2961 34 13.925 2906 35 13.944 2868 36 13.955 2853 37 13.862 2915 38 13.764 2782 39 13.889 2922 40 13.794 2851
Summary: High
Avg
Low
13.959 3133
13.855 2885
13.759 2778
String Name: UPS #2 Cab #1 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note*****
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #2 Cab #2
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 554.3
1 13.810 2887 2 13.896 2888 3 13.849 2869 4 13.898 2899 5 13.895 2826 6 13.889 2859 7 13.888 2948 8 13.891 2829 9 13.761 2904
10 13.779 2926 11 13.835 2832 12 13.881 2830 13 13.901 2853 14 13.894 2857 15 13.871 2826 16 13.869 2891 17 13.879 2834 18 13.861 2879 19 13.878 2955 20 13.899 2896 21 13.817 3000 22 13.859 2953 23 13.755 2793 24 13.766 2718 25 13.846 2873 26 13.846 2818 27 13.873 2851 28 13.862 3094 29 13.704 2929 30 13.866 2817 31 13.861 2940 32 13.864 3062 33 13.905 2873 34 13.910 2906 35 13.899 2852 36 13.874 2919 37 13.867 2897 38 13.871 2784 39 13.884 2880 40 13.868 2766
Summary: High
Avg
Low
13.910 3094
13.858 2880
13.704 2718
String Name: UPS #2 Cab #2 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note*****
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #2 Cab #3
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 554.4
1 13.847 2962 2 13.867 2854 3 13.840 2831 4 13.862 2807 5 13.856 2877 6 13.858 2805 7 13.866 2955 8 13.892 2875 9 13.878 2979
10 13.757 2833 11 13.866 2829 12 13.853 2815 13 13.835 2763 14 13.801 2765 15 13.858 2895 16 13.860 2946 17 13.869 2776 18 13.876 2913 19 13.865 2788 20 13.835 2796 21 13.872 3065 22 13.888 3023 23 13.849 2913 24 13.884 2858 25 13.882 2848 26 13.874 2675 27 13.871 2834 28 13.861 2672 29 13.852 2816 30 13.866 2774 31 13.806 2941 32 13.865 2873 33 13.866 2773 34 13.874 2792 35 13.857 2792 36 13.886 2901 37 13.869 2855 38 13.860 2761 39 13.852 2873 40 13.892 2841
Summary: High
Avg
Low
13.892 3065
13.859 2849
13.757 2672
String Name: UPS #2 Cab #3 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note*****
Install Date: 12/19/2023UPS: Eaton 9395-550
String Name: UPS #2 Cab #4
Model Number: Enersys DataSafe 12HX540-FR
Readings taken on Cell/Jar Voltage Internal Res.
6/19/2024 O.V. = 554.3
1 13.842 2747 2 13.846 2799 3 13.862 3063 4 13.841 3189 5 13.861 2740 6 13.849 2801 7 13.881 2921 8 13.852 2841 9 13.855 2781
10 13.859 2788 11 13.868 3032 12 13.858 2818 13 13.838 3076 14 13.842 2886 15 13.832 3069 16 13.832 3052 17 13.881 2803 18 13.866 2874 19 13.874 2784 20 13.863 2828 21 13.849 2773 22 13.876 2922 23 13.861 2973 24 13.846 2784 25 13.863 2823 26 13.840 2765 27 13.875 2777 28 13.888 2690 29 13.871 2719 30 13.866 2889 31 13.868 2868 32 13.861 2810 33 13.864 2808 34 13.856 2675 35 13.839 2895 36 13.823 2836 37 13.863 2859 38 13.860 2904 39 13.870 2859 40 13.884 2851
Summary: High
Avg
Low
13.888 3189
13.858 2859
13.823 2675
String Name: UPS #2 Cab #4 Model Number: Enersys DataSafe 12HX540-FR
General Comments:
*****Please Note*****
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