ABB ACS5000 User Manual page 39

03 POWER ELECTRONICS AND CABINET FEATURES
IGCT
Integrated gate-commutated thyristors (IGCT) are used as switching
devices in the inverter section of the phase converter units. IGCTs
combine fast switching capabilities with low losses and enable a drive
design with a low parts count.
Figure 3-4 IGCT
Fuseless protection concept
The drive does not require any power fuses. Instead, the IGCTs of the
inverter are used for protection. If an overcurrent occurs, protection firing
is triggered and fault clearing is initialized in less than 25 µs.
3BHS799208 E01 REV E ACS5000 WATER-COOLED USER MANUAL 39/186