Table of Contents
Advertisement
5 Maintenance and inspection
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.
For details on the precautions when performing maintenance, refer to For maintenance on
For maintenance
page 10.
5-1-1
Expectancy of the battery
Operating environment temperature
25°C
35°C
45°C
55°C
Note Not a guaranteed performance.
5-1-2
Estimated backup time
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.
Average ambient
temperature
A
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.
5 - 2
Caution
on page 14
Value
W = A × 24
S8BA-series Uninterruptible Power Supply (UPS) User's Manual (U726)
Battery life expectancy
10 years
6.7 years
3.7 years
1.9 years
Advertisement
Table of Contents
