ABB ACA 6 Series Hardware Manual page 97

Converters Stocked (Non-
operational) for Less Than
2 years
Converters Stocked (Non-
operational) for 2 Years
and Over
ACS 600 MultiDrive
Reforming time (hours)
6
5
4
3
2
1
0
0 1
Method 1
Figure 6-1. Capacitor reforming time for Method 1 and Method 2.
Switch the power on to the converter for a time given in Figure 6-1
(Method 1). The converter "wakes up" its capacitors by itself. Power the
converters up once a year to keep the capacitors in operational
condition.
Use Method 2 A or Method 2 B (both explained below) for capacitor
reforming if the converter has been stocked or non-operational for two
or more years.
WARNING! The ACS 600 MultiDrive converters (IGBT Supply Units
and Drive Units) must be reformed outside the cabinet. Reform the
phase modules separately outside the cabinet.
Chapter 6 – Preventive Maintenance
2
3 4
Non-operational time (years)
Method 2
5
6
6-3