5 Maintenance and inspection
5 - 2
S8BA-series Uninterruptible Power Supply (UPS) User’s Manual (U726)
5-1
Inspecting the battery
The battery has a limited lifespan.
(The life varies depending on your storage/use environment and backup frequency.)
The nearer the end of the life is, the more rapidly deterioration proceeds.
Note Not a guaranteed performance.
The backup time varies depending on the capacity of connected devices.
After calculating the total capacity of connected devices, refer to the graph of the backup time to obtain
an estimation of the initial value of the backup time. (This is also applied to checking the battery.)
1
Convert the total capacity (power consumption) of the connected devices to watts (W).
The indicator can show values in two different ways: amperes (A), and watts (W).
Example 1: 24 VDC, 145 W
Example 2: 24 VDC, 1.8 A
For devices that use the A indication, convert the capacity into W.
Example : 1.8 (A) = 1.8 × 24 (W) = 43.2 (W)
2
Add the values converted into W to obtain the total capacity of the connected devices.
3
Calculate the initial value of the backup time for the total capacity of the connected devices from
the graph below.
• Graph of backup time (graph of initial values for products that have not been used at 25°C).
The backup time becomes shorter than the graph (table) below when temperature is lower.
For details on the precautions when performing maintenance, refer to For maintenance on
page 10.
5-1-1
Expectancy of the battery
Operating environment temperature
Battery life expectancy
25°C
10 years
35°C
6.7 years
45°C
3.7 years
55°C
1.9 years
5-1-2
Estimated backup time
Average ambient
temperature
Value
A
W = A × 24
Caution
Summary of Contents for S8BA-24D24D480SBF
Page 5: ...Manual Structure 4 S8BA Series Uninterruptible Power Supply UPS User s Manual U726 ...
Page 21: ...Revision History 20 S8BA series Uninterruptible Power Supply UPS User s Manual U726 ...
Page 27: ...1 Overview of the product 1 6 S8BA series Uninterruptible Power Supply UPS User s Manual U726 ...
Page 55: ...4 Operations 4 10 S8BA series Uninterruptible Power Supply UPS User s Manual U726 ...