ABB DCT880 - Introduction to DCT880 Manual; Manual structure and content; Target audience and prerequisites; Storage and transport guidelines

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Table of contents
Safety Instructions 3
Table of contents 6
DCT880 Manuals and Tools 8
List of manuals ............................................................................................................................................... 8
Documentation ............................................................................................................................................... 9
DCT880 Information ....................................................................................................................................... 9
Introduction 10
Chapter overview ..................................................................................................................................... 10
Before You Start ...................................................................................................................................... 10
What this manual contains ....................................................................................................................... 10
Target group ............................................................................................................................................ 10
Associated publications ........................................................................................................................... 10
Storage and transport .............................................................................................................................. 10
Name plate ................................................................................................................................................... 11
Type code .................................................................................................................................................... 11
Ratings ......................................................................................................................................................... 11
Voltage ratings ......................................................................................................................................... 11
400 V / 525 V units, current and power ratings ....................................................................................... 12
690 V units, current and power ratings .................................................................................................... 12
Fault Tracing Thyristors 14
Tools ............................................................................................................................................................ 14
For commissioning and fault tracing ........................................................................................................ 14
Additionally for service and preventive maintenance .............................................................................. 15
How to detect a faulty thyristor .................................................................................................................... 15
A fuse is blown ......................................................................................................................................... 15
Output current measured by an oscilloscope .......................................................................................... 15
Thyristor diagnosis ................................................................................................................................... 16
How to find a faulty thyristor ........................................................................................................................ 16
Standard thyristor power controllers size T1 … T4 (20 A ... 740 A), without +S500 ............................... 16
Blown fuses .............................................................................................................................................. 16
Faulty thyristor ......................................................................................................................................... 16
Standard thyristor power controllers size T5 (890 A … 960 A), without +S500 ...................................... 17
Blown fuses .............................................................................................................................................. 17
Faulty thyristor ......................................................................................................................................... 17
Thyristor power controllers size T1 … T4 (20 A ... 740 A), with +S500................................................... 17
Blown fuses .............................................................................................................................................. 18
Faulty thyristor ......................................................................................................................................... 18
Handling the Semiconductors 19
General Instruction how to handle semiconductors ..................................................................................... 19
Exchange thyristors sizes T1 … T4 20
Installation of thyristor modules in thyristor power controllers size T1 … T4 (20 A ... 740 A) ..................... 20
Required tools .......................................................................................................................................... 20
Find faulty thyristor modules .................................................................................................................... 20
Remove faulty thyristor modules ............................................................................................................. 21
Install new thyristor modules ................................................................................................................... 26
Thyristor module terminals ...................................................................................................................... 27
Exchange thyristors size T5 29
Installation of thyristor modules in thyristor power controllers size T5 (890 A … 960 A) ............................ 29
Table of contents
3ADW000449R0101 DCT880 Service Manual e a