ABB ACA 6 Series - Page 99

Chapter 6 – Preventive Maintenance
ACS 600 MultiDrive 6-5
Method 2 B Capacitor reforming is based on a DC power supply connected to the
converter DC link. Power supply current charges converter capacitors.
If power supply cannot limit the current, voltage is increased gradually
(with e.g. 100 V steps). Maximum recommended reforming current is
500 mA. An appropriate reforming voltage is (1.35...
Ö2) × U
1
. The
reforming circuit is shown below. See Figure 6-1 for the reforming time.
WARNING! The converter supply must be disconnected while the
reforming circuit is connected.
* R = 100 Ohm / 500 W
*
L–
L+
R
1.35 ×U
1
Converter
or phase module
W2 (W1)
U2 (U1)
V2 (V1)
Disconnect
DC Power
Supply