ABB ACS550-01-06A9-4 [2/5] Abb drives

ABB Drives

CAPACITOR REFORMING

Inspection Instruction

3AFE 6873 5190

00522808_G.DOC

Dept.

Project

ORANGE

Status Date

05.May 2010

Author

Haapala Mari

Status

APPROVED/DAVIDSAINEN JANNE

Revision

Page

2 / 5

1.2 Reforming time

The intermediate circuit of the drive is kept in its nominal voltage for the reforming time to

”wake up” the capacitors. The reforming time required depends on how long the drive

has been stocked (non-operational). See figure 1.

Figure 1. Capacitor reforming time.

1.3 Drives stocked (non-operational) for less than 2 years

Switch the power on to the drive for a time given in figure 1 (Method 1). The drive ”wakes

up” its capacitors by itself. Power drives up once a year to keep the capacitors in

operational condition.

1.4 Drives stocked (non-operational) for 2 years and over

Use method 2A or method 2B for capacitor reforming if the drives have been stocked

(non-operational) for two or more years.