Frequency Inverter DF51... - Moeller.com.tr

04/07 AWB8230-1541GB Service life of the internal DClink capacitorsService life of the internal DC link capacitorsThe frequency inverter’s internal DC link is constructed withelectrolytic capacitors. These filter the rectified mains voltage andstore the energy for the inverter.h+M3˜Figure 170:Internal DC link capacitorsThe capacitors’ service life can be extended by including inductorson the mains side (line reactors, DC link reactor).Higher ambient temperatures reduce the capacitors’ service life.These must be in the permissible range.hCheck the device fan and heatsink function at regularintervals.T a[°C]5040a3020100-101 2 3 4 5 6 7 8 9 10t [a]Figure 171: Service life of the capacitors as a function of ambienttemperaturea Service life of capacitors at uninterrupted duty of 12 hours per day191