Note On Hard Power Systems - KEB COMBIVERT F6 Instructions For Use Manual

cONNecTION OF THe POWer UNIT

4.2.3.3 Note on hard power systems

The service life of drive converters with voltage DC link depends on the DC voltage,
surrounding temperature and the current load of the electrolytic capacitors in the DC
link. The use of mains chokes can increase the service life of the condensators to a con-
siderable extent, especially when connecting to „hard" power systems or when under
permanent drive load (continuous duty).
The term "hard" power system means that the nodal point power (S
very high (>> 200) compared to the rated output power of the drive converter (S
S
Net
k = –––– >> 200
S
out
52
2 MVA (supply transformer)
e.g. k = –––––––––––––––––––––
62 kVA (21F6)
A listing of filters and chokes => „Filters and chokes"
) of the mains is
Net
= 33 ––> no choke required
).
out