ABB ACS 6000 - Page 4

ABB
2 (4) 3BHS202077 ZAB E01 Rev. C ACS 6000 Maintenance Manual
Chapter 7 - Changing 7/9 MVA Phase Modules 7-1
7.1 Required Tools and Accessories 7-1
7.2 Removing a Phase Module 7-2
7.3 Installing a Phase Module 7-5
Chapter 8 - Changing Diodes and IGCTs
in 7/9 MVA Phase Modules 8-1
8.1 Required Tools and Accessories 8-1
8.2 Overview 8-2
8.3 Safety 8-4
8.4 Replacing Clamp and NP Diodes 8-5
8.4.1 Preparatory Steps 8-5
8.4.2 Replacing Clamp Diodes 8-8
Upper Clamp Diode 8-8
Lower Clamp Diode 8-9
8.4.3 Replacing NP Diodes 8-11
Removing Upper NP Diode 8-11
Removing Lower NP Diode 8-12
Assembling the Stack 8-12
8.4.4 Finishing Steps 8-13
8.5 Replacing Free Wheeling Diodes 8-14
8.6 Replacing IGCTs 8-16
Chapter 9 - Changing Thyristors in EXU 9-1
9.1 Required Tools and Accessories 9-1
9.2 Safety 9-1
9.3 Replacing Thyristors in EXUs for Brushless Excitation 9-2
9.3.1 Preparatory Steps 9-2
9.3.2 Treating a New Thyristor before Installation 9-3
9.3.3 Mounting a New Thyristor 9-3
9.4 Replacing Thyristors in EXUs for Direct Excitation 9-5
9.4.1 Preparatory Steps 9-5
9.4.2 Treating a New Thyristor before Installation 9-6
9.4.3 Mounting a New Thyristor 9-6
9.5 Deflection Diagram 9-7
Chapter 10 - Changing Semiconductors in VLU 10-1
10.1 Required Tools and Accessories 10-1
10.2 Safety 10-1
10.3 Replacing the Semiconductors 10-2