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Table of contents
3ADW000488R0101 DCS880 Service manual e a
Remove faulty thyristor modules .................................................................................................................... 28
Install new thyristor modules .......................................................................................................................... 33
Remove faulty SDCS-BAB-F0x ...................................................................................................................... 35
Install new SDCS-BAB-F0x ............................................................................................................................ 36
Thyristor module and SDCS-BAB-F0x location in DCS880-S01 (2-Q) units.................................................. 37
Thyristor module and SDCS-BAB-F0x location in DCS880-S02 (4-Q) units.................................................. 39
Thyristor module terminals and SDCS-BAB-F0x ............................................................................................ 40
Exchange thyristors size H6 41
Installation of thyristor modules in converters size H6 (900 … 2000 A) ............................................................. 41
Required tools ................................................................................................................................................. 41
Find faulty thyristor modules ........................................................................................................................... 42
Remove faulty thyristor ................................................................................................................................... 43
Install new thyristor ......................................................................................................................................... 44
Location of thyristors in frame H6 (4-Q bridge) .............................................................................................. 45
Location of thyristors in frame H6 (2-Q bridge) .............................................................................................. 45
Location of branch fuses frame H6 ................................................................................................................. 46
Exchange thyristors size H7 47
Installation of thyristor modules in converters size H7 (1900 … 3000 A) ........................................................... 47
Required tools ................................................................................................................................................. 47
Bidirectional-Controlled-Thyristors (BCTs) ..................................................................................................... 48
Find faulty thyristor modules ........................................................................................................................... 49
Remove faulty thyristor ................................................................................................................................... 50
Install new thyristor ......................................................................................................................................... 53
Location of thyristors in frame H7 (4-Q bridge with single thyristors) ............................................................. 55
Location of thyristors in frame H7 (4-Q bridge with BCTs) ............................................................................. 56
Location of thyristors in frame H7 (2-Q bridge with single thyristors) ............................................................. 57
Location of branch fuses frame H7 ................................................................................................................. 58
Exchange thyristors size H8 59
Installation of thyristor modules in converters size H8 (2500 … 5200 A) ........................................................... 59
Required tools ................................................................................................................................................. 59
Find faulty thyristor modules ........................................................................................................................... 60
Remove faulty thyristor ................................................................................................................................... 62
Install new thyristor ......................................................................................................................................... 64
Location of thyristors in frame H8 (4-Q bridge) .............................................................................................. 66
Location of thyristors in frame H8 (2-Q bridge) .............................................................................................. 66
Location of branch fuses frame H8 (busbars on the right) ............................................................................. 67
Location of branch fuses frame H8 (busbars on the left)................................................................................ 68
Exchange the control unit (SDCS-CON-H01) 69
General ............................................................................................................................................................... 69
Required Tools ................................................................................................................................................ 69
Overview of control unit exchange .................................................................................................................. 69
Safe Torque Off (STO) 73
Contents of this chapter ...................................................................................................................................... 73
Description .......................................................................................................................................................... 73
Operation principle .............................................................................................................................................. 73
Flow chart ........................................................................................................................................................... 74
STO revalidation test .......................................................................................................................................... 76
Test procedure ................................................................................................................................................ 76
Evaluation of the graph and observations ...................................................................................................... 78
Repetitive function test (fault shutdown path) ..................................................................................................... 80
Fault shutdown path ....................................................................................................................................... 80
Test procedure ................................................................................................................................................ 80
Evaluation of the graph and observations ...................................................................................................... 82
Acceptance test .................................................................................................................................................. 84
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