ABB ACA 6 Series, Hardware Manual

Page: 49 / 102

Chapter 3 – Electrical Installation
ACA 6xx Sections and ACS/ACC 6x7 (132 to 3000 kW) Frequency Converters 3-7
2. Measure the resistance between the DC busbars with a
multimeter.
Fuses Fuses are needed to protect the supply section and the inverter of the
ACx 600 in case of an internal short circuit. The ACS 600 MultiDrive
and the ACx 6x7 are equipped with internal input fuses introduced in
Appendix A – Technical Data (located in the Safety and Product
Information manual for ACS 600 MultiDrive). If a fuse is blown, it must
be replaced with a similar ultrarapid fuse.
Internal Fuses
The fuse types used with different supply sections of ACS 600
MultiDrive frequency converters and ACx 6x7 units from 630 to
3000 kW are listed below.
Fuse Type Supply Section
1 Supply AC fuses B1, B2, B3
2 Branch fuses. Each semiconductor of
the rectifier bridge is protected with a
fuse. B4, B5
3 Supply DC fuses Thyristor Supply: B1, B2, B3
4 Drive unit DC fuses. These fuses are in
all ACS 600 MultiDrive units and in
parallel connected ACx 6x7 units.
5 Braking section DC fuses
-
R
=
¥
or rises gradually
depending on the multimeter
type
+
-
+
-
+
W
1 2
3 4
5