ABB ACS850 - Checking the Charging Capacity; Single AC Input

21
Checking the charging capacity
When the power is switched on in the common DC system, the DC link capacitors in
each drive module are charged. The charging current is fed through the unit(s)
connected to the AC. Due to this, the charging capacity of the selected supply unit has
to be checked.
The drive modules in frame sizes A-D have a charging circuit in series with the
capacitor bank.
• In common DC connection, the charging circuits act in parallel.
• The sum of the charging currents is fed from the supply.
In frame sizes E0, E and G, the charging circuit is in parallel with the input bridge and
the charging circuit(s) of the drive(s) are connected to the supply charge of all the
capacitor banks.
The charging circuit data for each drive module is shown in the following table.
R R
min
ACS850 Type
ohm ohm
03A0-5, 03A6-5, 04A8-5, 06A0-5 50 21.7
08A0-5 50 16.5
010A-5 130 14.7
014A-5, 018A-5 130 10.4
025A-5, 030A-5, 035A-5 66 8.5
044A-5, 050A-5 66 4.6
061A-5, 078A-5, 094A-5 33 4.6
103A-5, 144A-5 33 N/A
166A-5, 202A-5, 225A-5, 260A-5
290A-5
27 N/A
430A-5, 521A-5, 602A-5, 693A-5
720A-5
3.3 N/A
R : charging resistance of the drive module.
R
min
: the minimum value of the total effective charging resistance allowed for the drive
module
Single AC input
Define the total effective charging resistance R
tot
from the drive modules connected to
the DC link.
•
n
tot
RRR
R
111
1
21
+++
=
L
Common DC configurations