ABB ACA 6 Series, Hardware Manual

Page: 97 / 102

Chapter 6 – Preventive Maintenance
ACS 600 MultiDrive 6-3
Figure 6-1. Capacitor reforming time for Method 1 and Method 2.
Converters Stocked (Non-
operational) for Less Than
2 years
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.
Converters Stocked (Non-
operational) for 2 Years
and Over
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.
0 1 2 3 4
5
6
1
0
2
3
4
5
6
Non-operational time (years)
Reforming time (hours)
Method 1 Method 2