ABB ACS550-01-08A8-4+B055 [4/5] Replacement

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

4 / 5

Capacitor reforming is based on DC power supply, which is connected to the drive input.

The power supply current charges drive capacitors. If the power supply cannot limit the

current, the voltage is increased gradually (with e.g. 100V steps). The maximum

recommended reforming current is 100mA. An appropriate reforming voltage is (1.35 ...

2) * U

. See the reforming time in figure 1.

WARNING: Disconnect the mains supply while the reforming circuit is connected.

Note! Markings for drive input differs between drive types:

ACS550

U1 V1 W1

ACS150/310/320/350/355

U1/L V1/N W1

ACS50/55

L/R N/S

Figure 3. The reforming circuit for method 2B.

2 Replacement

The drive intermediate circuit employs several electrolytic capacitors. Capacitor life can

be prolonged by lowering the ambient temperature.

It is not possible to predict a capacitor failure. Capacitor failure is usually followed by an

input power fuse failure or a fault trip. Contact ABB if capacitor failure is suspected.

Replacements for ACS550 frame sizes R5 and R6 are available from ABB. Do not use

other than ABB specified spare parts.