Powertronix Quasar Service Manual page 31

Service Manual
Battery String Voltage Check
1.
Warning
Do not fit the battery fuses into the fuse holders or close the fuse holders.
2.
3.
4.
Note: A measured voltage substantially less then +385V DC may point to a
3x3 UPS Installation
Issue 2 - November 2001
Ensure the battery fuses are removed from the switched fuse holders.
With a DVM set to a DC range of above 450V, check for each individual battery string
voltage. This voltage for a serviceable battery should be between +385V and +416V DC.
Measure the battery string voltage from the lower connecting screw of the appropriate fuse
holder and the battery ve connection bar. As shown in
If a voltage of less than +385V is recorded re check the battery connections and re test the
string voltage.
defective battery block this can be further isolated by disconnecting each
individual tray and carry out a further check of each tray voltage. This
should be greater than 132V for trays of 11 battery blocks and 120V for 10
blocks.
Chapter 2 - Installation
Battery Installation
Figure 2-3
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