4-5 Capacitor Life Curve 4-5 Capacitor Life Curve Ambient temperature (°C) 50 40 12-hour operation/day 4 30 20 10 Inspection and Maintenance 0 -10 2 4 5 6 7 8 9 10 3 Capacitor life (year) 1 Note 1: Ambient temperature refers to the surrounding (atmospheric) temperature of the Regenerative Braking Unit, or the temperature inside if it’s encased or installed in an enclosure. Note 2: The smoothing capacitor, which will waste because of the internal chemical reaction, should normally be replaced once every 5 years.
If the ambient temperature is high, however, frequent operation of the Regenerative Braking Unit will cause its service life to be significantly shortened due to capacitor deterioration. 4-6 24-hour operation/day