ABB ACS6080 - Figure 3-8 LSU (12-Pulse); Table 3-2 Main Components in a 12-Pulse LSU Cabinet

POWER ELECTRONICS AND CABINET FEATURES
PRODUCT
ACS6000
DOCUMENT KIND
User manual
DOCUMENT ID.
3BHS212794 E01
REV.
N
LANG.
en
PAGE
47/266
Figure 3-8 LSU (12-pulse)
Table 3-2 Main components in a 12-pulse LSU cabinet
Component Description
12-pulse diode rectifier
Snubber circuit Limits the rate of the voltage rise (dv/dt) across the diodes and
the crowbar thyristors.
di/dt limiting reactors Define the current rise in the thyristor crowbar.
Thyristor crowbar Protection circuit that activates when a short-circuit occurs. By
applying protection firing, the thyristor crowbar short-circuits
the rectifier to prevent further damage of the drive.
1) Snubber resistor
2) Snubber capacitor
3) Rectifier monitoring unit
4) di/dt limiting reactors
5) Diode stacks
1
2
3
4
5
5
5
5