App-18
Appendix-2 Product Life Curve
Appendix-2 Product Life Curve
Life of the Inverter smoothing capacitor
Ambient temperature refers to the surrounding temperature of the Inverter. The following diagram
shows the product life curve.
The smoothing capacitor, which will deteriate due to the chemical reaction caused by parts temper-
atures, should normally be replaced once every 5 years. However, if the ambient temperature is
high, or the Inverter is used with a current exceeding the rated current, for example, under overload
conditions, its life will be significantly shortened.
Note: Ambient temperature refers to the surrounding (atmospheric) temperature of the Inverter, or
the temperature inside if the Inverter is encased or installed in an enclosure.
10
20
30
40
1
50
0
-10
2345678910
Ambient
temperature
(°C)
Capacitor life (year)
24-hour operation/day
12-hour operation/day
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