Trips and Fault Finding 7-27
DC590+ DRV Series DC Digital Drive
SCR Troubleshooting
Non-regenerative drives contain three SCR packs, A, B and C. Each SCR pack contains two thyristors. Three additional SCR packs (D, E and F)
mount above SCR packs A, B and C for regenerative drives. The layout of the SCR packs is shown in Figure 6-5 as they appear on the drive heatsink,
from left to right.
L1 L2 L3A+
T1 T3 T5
A-
ABC
Non-regenerative Drive
T1 T3 T5
DEF
Regenerative Drive
L1 L2 L3
A+
T4 T6 T2
A-
ABC
T10 T12 T8
T7
T9
T11
Joint Supply Connection
(L1, L2 or L3)
Cathode
Anode
Gate Lead Connection
(Yellow)
Gate Lead Connection
(Yellow)
T1 T6 T2
Figure 6-5 SCR Layout
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