Checking The Charging Capacity; Single Ac Input - ABB ACSM1 Hardware Manual

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Checking the charging capacity

When the power is switched on in the common DC system, the DC link capacitors in
each drive module and regen supply module are charged. The charging current is
fed through the supply module(s) connected to the AC. Due to this, the charging
capacity of the supply module(s) has to be checked.
The ACSM1 drive and supply 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.
The charging circuit data for each supply module ACSM1-204 supply module and
ACSM1-04 Drive module are shown in the following tables.
ACSM1-204...
-024A, -031A, -040A, -046A
R
R
min

Single AC input

Calculate the total effective charging resistance R
connected to the DC link.
R
tot
R ...R
1
condition must be fulfilled: R
Planning the electrical installation
Frame
-07A0 A
-016A B
-031A C
-046A C
-090A D
ACSM1-04...
-02A5, -03A0, -04A0,
-05A0, -07A0
-09A5, -012A, -016A,
-060A, -073A, -090A
Charging resistance of the drive of supply module.
The minimum value of the total effective charging resistance allowed for the
drive module.
1
=
1 1 1
+ +...+
R R R
1 2 n
are the charging resistance values of each drive module. The following
n
R R
min
ohm ohm
50 25
130 20
66 15
66 10
33 5
R
Frame
ohm
A 50
B 130
C 66
D 33
> R
tot min
from the drive/supply modules
tot