Chapter 8 - Exchange of Thyristors for Size C3
VI A
8 - 4
DCS 500 / DCS 600 Service Manual
- Find the required torque from the table below. Tighten the
screws alternatively 1/4 turn at a time until the correct torque is
reached.
Converter type
Torque
/ Nm
Force
/ kN
Press
clamp
400 V - 500 V
DCS x0x-0900-4(5)
5,5 - 6
8 - 12
SLZF 89A
DCS x0x-1200-4(5)
5,5 - 6
8 - 12
SLZF 89A
DCS x0x-1500-4(5)
11,5 - 12
14,4 - 24
SLZF 89B
DCS x0x-2000-4(5)
11,5 - 12
14,4 - 24
SLZF 89B
600 V - 690 V
DCS x0x-0900-6(7)
7,5 - 8
10 - 15
SLZF 89A
DCS x0x-1500-6(7)
11,5 - 12
14,4 - 24
SLZF 89B
Table 8-1
Mounting torques and forces for disc type thyristors
- In case of a 4-quadrant type converter:
•
Perform the OHM test with both polarities another time to
make sure, the thyristor, which was used for the reverse
bridge, is definitly healthy.
•
If this test indicates high resistance, the thyristor is healthy
and can be used.
•
If this test indicates low resistance, the thyristor of the re-
verse bridge is faulty and needs to be replaced: remove it
again mount a new one as described above.
- Install in the fuse(s).
- Connect the lead of the snubber capacitor, if it was removed be-
fore.
- Reconnect all parts, which were removed before:
•
plastic covers, etc.
3ADW000093R0701_DCS500B/DCS600_Service manual_e_g
