ABB ACS800-67LC User manual

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ABB WIND TURBINE CONVERTERS
ACS800-67LC wind turbine converters
Hardware manual

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List of related manuals
For manuals, contact your local ABB representative.
Standard manuals Code (English)
ACS800-67LC wind turbine converters hardware manual 3AUA0000058400
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ICU800-67LC incoming units (+C108/+C109)
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Manuals and quick guides for I/O extension modules,
fieldbus adapter, etc.

Hardware manual
ACS800-67LC wind turbine converters
3AUA0000058400 Rev C
EN
EFFECTIVE: 2018-11-09
2018 ABB Oy. All Rights Reserved.
1. Safety instructions
4. Mechanical installation
Table of contents
6. Electrical installation

5
Table of contents
1. Safety instructions
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Use of warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Safety in installation and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
General safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Printed circuit boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Fiber optic cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Work with an installation stand and lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Work on the liquid cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Safe start-up and operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
General safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2. Introduction to the manual
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Target audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Purpose of the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Contents of the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Related documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Categorization by frame size and option code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Quick installation, commissioning and operation flowchart . . . . . . . . . . . . . . . . . . . . . . . 19
Terms and abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3. Operation principle and hardware description
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Operation principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Wind turbine system with low voltage stator (690 V) . . . . . . . . . . . . . . . . . . . . . . . . . 24
Wind turbine system with medium voltage stator (> 1000 V) . . . . . . . . . . . . . . . . . . . 24
Grid-side and rotor-side converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Product overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Converter with 200 mm wide incoming cubicle . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Converter with 400 mm wide incoming cubicle (option +C111) . . . . . . . . . . . . . . . 28
Power modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Crowbar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Smoke detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Power cable lead-throughs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Blank plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Sealing modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Cable glands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Control interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Circuit boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
PC tool interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Control unit of the grid-side converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6
Control unit of the rotor-side converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Control unit NDCU-33Cx/RDCU-12C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Voltage and Current Measurement Unit NUIM-61C/NUIM-10C . . . . . . . . . . . . . . . . 37
Auxiliary Measuring Unit NAMU-01C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Fiber optic links . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Type designation labels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Type designation key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Basic code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Option codes (+ codes) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
4. Mechanical installation
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Checking the installation site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Required tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Checking the delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Moving the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Moving the unit by crane, fork-lift or pallet truck . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Moving the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
…by crane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
…by fork-lift or pallet truck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Final placement of the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Overview of the installation procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Fastening the cabinet to the roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Joining the liquid cooling unit to the converter cabinet . . . . . . . . . . . . . . . . . . . . . . . . . 49
Connecting the liquid pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Cable duct in the floor below the cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Electric welding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Lifting the door (option +C161) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
5. Planning the electrical installation
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Selecting the grid-side disconnecting device (disconnecting means) . . . . . . . . . . . . . . 53
Checking the compatibility of the generator and converter . . . . . . . . . . . . . . . . . . . . . . 54
Protecting the generator insulation and bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Selecting the power cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
General rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Typical power cable sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
IEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
UL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Alternative power cable types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Rotor cable shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Additional US requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Conduit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Armored cable / shielded power cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Suitable power supply networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
TN-C-S power supply network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
TN-S power supply network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Selecting the grid-side power cabling principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Alternative 1: Symmetrical, shielded three-phase cable(s) . . . . . . . . . . . . . . . . . . . . 60

7
Alternative 2: Cable bus system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Alternative 3: Single core cables with concentric protective shields . . . . . . . . . . . . . . 61
Selecting the rotor cabling principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Selecting the control cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
General rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Relay cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Control panel cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Routing the cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Control cable ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Protecting the converter, grid cable, rotor and rotor
cable in short-circuit situation and against thermal overload . . . . . . . . . . . . . . . . . . . . . 64
Protecting the grid cable in short-circuit situations . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Protecting the converter in short-circuit situations . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
AC fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
DC fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Protecting the rotor and rotor cable in short-circuit situations . . . . . . . . . . . . . . . . . . 64
Protecting the converter, grid cable and rotor cable against thermal overload . . . . . 64
Protecting the converter against ground faults
in the converter, grid cable, rotor or rotor cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Implementing the emergency stop function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Supplying power for the auxiliary circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Uninterrupted auxiliary power supply for the converter (UPS) . . . . . . . . . . . . . . . . . . 65
Auxiliary power supply for converter (non-UPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Planning the installation of equipment connected to the rotor cable . . . . . . . . . . . . . . . . 66
Safety switches, contactors, connection boxes, etc. . . . . . . . . . . . . . . . . . . . . . . . . . 66
Bypass connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6. Electrical installation
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Checking the insulation of the assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Grid cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Rotor and rotor cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
DC resistor and resistor cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Option +D150 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Option +D150+D151 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Connecting the grid cables – units with 200 mm wide incoming cubicle . . . . . . . . . . . . . 69
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Connection procedure – a blank plate at the cable lead-through . . . . . . . . . . . . . . . . 70
Connection procedure – sealing modules at the cable lead-through . . . . . . . . . . . . . 71
Connection procedure – cable glands at the cable lead-through . . . . . . . . . . . . . . . . 73
Connecting the grid cables – units with 400 mm wide
incoming cubicle (option +C111) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Connection procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Connecting the rotor cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Connection procedure – a blank plate at the cable lead-through . . . . . . . . . . . . . . . . 76
Connection procedure – sealing modules at the cable lead-through . . . . . . . . . . . . . 76
Connection procedure – cable glands at the cable lead-through . . . . . . . . . . . . . . . . 77
Control connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Connection procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Connecting a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

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7. Installation checklist
Mechanical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Cooling circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
8. Maintenance
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Power connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Tightening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Cleaning and greasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Replacing the cooling fan of the converter module . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Replacing the fan in the 400 mm wide incoming cubicle (option +C111) . . . . . . . . . 93
Replacing the fan in auxiliary control cubicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Converter module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Replacing the converter module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Installing the installation stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Reforming the capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Replacing the capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
PPCS branching unit (APBU-xx) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Replacing the memory backup battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Replacing the pressure transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Replacing DC fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Bussmann fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Mersen fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Replacing AC fuses (option +C111) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Replacing the capacitor of the LCL filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Replacing the temperature measurement sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Replacing the smoke detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Replacing the main contactor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Replacing the charging circuit resistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Replacing the crowbar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Replacing the crowbar resistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
9. The internal cooling circuit
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Diagram of the internal cooling circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Planning the cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Connection to a customer cooling unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
General requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Additional US and Canada requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Coolant temperature control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Mechanical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Coupling the internal cooling circuit to a customer cooling unit . . . . . . . . . . . . . . . 115
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Filling up and bleeding the internal cooling circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Converter line-ups with a customer cooling unit . . . . . . . . . . . . . . . . . . . . . . . . . 116

9
Draining the internal cooling circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Adding inhibitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Temperature limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Pressure limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Freeze protection and corrosion inhibition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Glycol concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Approved coolants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
10. Technical data
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Grid-side converter ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Rotor-side converter ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Temperature derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Altitude derating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Type equivalence table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Main circuit AC fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Main circuit DC fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Dimensions and free space requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Losses, cooling data and noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Internal cooling circuit data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
LCL filter data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Terminal and lead-through data for the power cables . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Terminal and lead-through data for the control cables . . . . . . . . . . . . . . . . . . . . . . . . . 126
Electric power network specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Generator connection data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
DC resistor connection data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
DC connection data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Auxiliary circuit current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Cooling fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
UPS supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Non-UPS supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Applicable standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Grid codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
CE marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Compliance with the European Low Voltage Directive . . . . . . . . . . . . . . . . . . . . . . . 130
Compliance with the European EMC Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Compliance with the European Machinery Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Declaration of incorporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Validating the operation of a safety function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Authorized person . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Acceptance test reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Compliance with the EN 61800-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132

10
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Category C3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Category C4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
UL marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
UL checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
CSA marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
C-Tick marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
11. Dimension drawings
What this chapter contains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
ACS800-67LC-1075/0575-7 and -1375/0575-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
With 400 mm wide incoming cubicle (option +C111) . . . . . . . . . . . . . . . . . . . . . . . 137
ACS800-67LC-1375/1125-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
With 400 mm wide incoming cubicle (option +C111) . . . . . . . . . . . . . . . . . . . . . . . 139
ACS800-67LC-1595/0865-7 and -2035/1125-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
With 400 mm wide incoming cubicle (option +C111) . . . . . . . . . . . . . . . . . . . . . . . 141
Sealing modules for grid cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Option +1H370 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Options +1H370 and +C111 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Options +2H370 and +C111 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Option +1H371 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Options +1H371 and +C111 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Options +2H371 and +C111 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Option +H378 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Options +H378 and +C111 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Sealing modules for rotor cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Option +1H372 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Option +2H372 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Option +3H372 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
Option +1H373 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Option +2H373 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Option +3H373 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Option +H375 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Further information
Product and service inquiries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Product training. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Providing feedback on ABB Drives manuals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153

Safety instructions 11
1
Safety instructions
What this chapter contains
This chapter contains safety instructions which you must follow when installing, operating
and servicing the wind turbine converter. If ignored, physical injury or death may follow, or
damage may occur to the converter, the generator or driven equipment. Read the safety
instructions before you work on the converter.
Use of warnings
There are two types of safety instructions throughout this manual: warnings and notes.
Warnings caution you about conditions which can result in serious injury or death and/or
damage to the equipment, and advise on how to avoid the danger. Notes draw attention to
a particular condition or fact, or give information on a subject. The warning symbols are
used as follows:
Electricity warning warns of hazards from electricity which can cause physical
injury and/or damage to the equipment.
General warning warns about conditions, other than those caused by electricity,
which can result in physical injury and/or damage to the equipment.
Electrostatic sensitive devices warning warns of electrostatic discharge which
can damage the equipment.

12 Safety instructions
Hot surface warning warns about hot surfaces. Some parts inside the converter
cabinet remain hot for a while after the disconnection of input power.
Safety in installation and maintenance
Electrical safety
These warnings are intended for all who work on the converter or generator. Ignoring the
instructions can cause physical injury or death, or damage to the equipment.
WARNING!
•Only qualified electricians are allowed to install and maintain the converter!
•Before working in the incoming cubicle, isolate the whole converter from the electrical
power supply network. The load switch disconnector (option +C111) or air circuit
breaker (options +C108/+109) does not remove the voltage from the grid-side
connection terminals of the converter.
•Never work on the converter or generator when input power is applied. After
disconnecting the input power, always wait for 10 minutes to let the intermediate circuit
capacitors discharge before you start working on the converter or generator. Always
ensure by measuring with a multimeter the voltage between the power terminals and
earth and DC link and earth that the converter does not have any live parts before
beginning work.
•Apply temporary grounding before working on the unit. The converter does not have
internal grounding device, therefore external equipment is required.
•Do not work on the control cables when input power is applied to the converter or to
the external control circuits. Externally supplied control circuits (eg, UPS) may carry
dangerous voltage even when the input power of the converter is switched off.
•Live parts inside the cubicle are protected against direct contact. However, pay special
attention when handling metallic shrouds. The cabinet is protected to IP54 only when
doors are closed.
•Do not make any withstand voltage tests on the converter.
•Isolate the cables from the converter when testing the insulation resistance or
withstand voltage of the power cables or the generator.
•When reconnecting the cables, always check that the phase order is correct.
Note:
•The rotor cable terminals may contain a dangerously high voltage when the input
power is on, regardless of whether the generator is running or not.
•The converter DC link may contain a dangerously high voltage, regardless of whether
the converter is running or not.
•Depending on the external wiring, dangerous voltage (115 V or 230 V) may be present
on the relay outputs of the converter system.

Safety instructions 13
WARNING!
•Use extreme caution when manoeuvring heavy converter or filter modules.
•Beware of hot surfaces. Some parts inside the converter cabinet, such as power
modules or crowbar(s), remain hot for a while after the disconnection of input power.
•Pay attention to rotating cooling fans. The cooling fans may continue to rotate for a
while after the disconnection of the electrical supply.
•Make sure that dust from drilling does not enter the converter when installing.
Electrically conductive dust inside the converter cabinet may cause damage or lead to
malfunction.
•Recommendation: Do not fasten the cabinet by riveting or welding. However, if
welding is necessary, ensure that the return wire is properly connected close to the
weld in order not to cause damage to the electronic equipment in the cabinet. Also
ensure that welding fumes are not inhaled.
Grounding
These instructions are intended for all who are responsible for the grounding of the
converter. Incorrect grounding can cause physical injury, death or equipment malfunction
and increase electromagnetic interference.
WARNING!
•Ground the converter, the generator and adjoining equipment to ensure personnel
safety in all circumstances, and to reduce electromagnetic emission and interference.
•Make sure that grounding conductors are adequately sized as required by local safety
regulations.
Note:
•Power cable shields are suitable for equipment grounding conductors only when
adequately sized to meet safety regulations.
General safety
Printed circuit boards
WARNING! The printed circuit boards contain components sensitive to
electrostatic discharge. Wear a grounding wrist band when handling the boards.
Do not touch the boards unnecessarily.
Fiber optic cables
WARNING! Handle the fiber optic cables with care. When unplugging optic
cables, always grab the connector, not the cable itself. Do not touch the ends of
the fibers with bare hands as the fiber is extremely sensitive to dirt. The minimum
allowed bend radius is 35 mm (1.38 in.).

14 Safety instructions
Work with an installation stand and lifting
Note: The installation stand is not included as standard in the delivery. Please contact
local ABB representative for further inquires regarding installation stand.
WARNING!
•Attach a lifting chain to the front of the module before pulling out the entire module
from the cabinet.
•Ensure that the installation stand legs have been locked in position before moving a
module onto it.
•Ensure that the lifting chains have been evenly adjusted before lifting the module.
•Do not go under a lifted module or lift a module over other people.
Work on the liquid cooling system
These instructions are intended for all who are responsible for installation and
maintenance work of the liquid cooling system of the converter. Ignoring these instructions
can cause physical injury or damage to the equipment.
WARNING!
•Beware of hot liquid. Do not work on the liquid cooling system until the pressure is
lowered down by stopping the pumps. High-pressure warm coolant (6 bar (600 kPa),
over 50 °C (122 °F)) is present in the internal cooling circuit when it is in operation.
•Before power switch-on, make sure that the internal cooling circuit is filled up with
appropriate coolant. Running the pump dry will damage it. Also the converter will not
cool down.
•Avoid skin contact with coolant, especially antifreeze. Do not syphon them by mouth. If
such substance is swallowed or gets into the eyes, seek medical advice.
•Do not overtighten the outer union of the nuts of the liquid hoses -
leave 2…3 mm (0.08…0.1 in.) of thread visible. Overtightening will
break the hose.
•Drain the unit before storing in temperatures below 0 °C (32 °F).
Freezing of the liquid cooling system is not allowed. Add antifreeze and corrosion
inhibitors to the cooling liquid. Operation at liquid temperatures below 5 °C (41 °F) is
not permitted, not even with antifreeze.
2 mm

Safety instructions 15
Safe start-up and operation
General safety
These warnings are intended for all who plan the operation of the converter or operate the
converter. Ignoring the instructions can cause physical injury or death or damage to the
equipment.
WARNING!
•Before adjusting the converter and putting it into service, make sure that the generator
and all driven equipment are suitable for operation throughout the speed range
provided by the converter.
•The doors of the converter must be kept locked when the converter is in operation.
•Before power switch-on, make sure that the liquid cooling circuit is filled up with
coolant. Running the pump dry will damage it and the converter will not cool down.
•Do not control the generator with the disconnecting device (means); instead, use the
commands via I/O board of the converter or via fieldbus.
Note:
•It is not allowed to start-up the converter more often than once in two minutes during
commissioning. In normal use it is not allowed to do repetitive start-ups more often
than once in 10 minutes. Avoid frequent start-ups.
•If an external source for start command is selected and it is ON, the converter will start
immediately after fault reset unless the converter is configured for a pulse start/stop by
a parameter.
WARNING! Do not work on the converter when the generator is rotating. Also,
when the input power is switched off and the converter is stopped, a rotating
generator may feed power to the intermediate circuit of the converter and the
power connections become live.
•Before installation and maintenance work on the converter:
•Stop the converter and the generator.
•Ensure that the generator cannot rotate during work. Lock the shaft mechanically
(eg, by using a brake). Make sure that wind or other systems, like hydraulic
crawling drives, are not able to rotate the generator directly or through any
mechanical connection like felt, nip, rope, etc.
Ensure that there is no voltage on the converter power terminals:
Alternative 1) Disconnect the generator from the converter with a safety switch or by other
means. Measure that there is no voltage present on the converter grid-side or rotor-side
terminals (L1, L2, L3, U2, V2, W2, UDC+, UDC-).
Alternative 2) Measure that there is no voltage present on the grid-side or rotor-side
terminals of the converter (L1, L2, L3, U2, V2, W2, UDC+, UDC-). Ground the converter
grid-side and rotor-side terminals temporarily by connecting them together as well as to
the PE.
Alternative 3) If possible, both of the above.

16 Safety instructions

Introduction to the manual 17
2
Introduction to the manual
What this chapter contains
This chapter describes the intended audience and contents of the manual. It contains a
flowchart of steps in checking the delivery, installing and commissioning the converter. The
flowchart refers to chapters/sections in this manual and other manuals.
Applicability
The manual is compatible with ACS800-67LC wind turbine converters.
Target audience
This manual is intended for people who plan the installation, install and service the
converter. Read the manual before working on the converter. The reader of the manual is
expected to know the standard electrical wiring practices, electronic components and
electrical schematic symbols.
The manual is written for readers worldwide. Both SI and imperial units are shown where
applicable.
Purpose of the manual
This manual instructs in planning the installation, installing and maintaining the converter.

18 Introduction to the manual
Contents of the manual
The chapters of this manual are briefly described below.
Safety instructions gives safety instructions for the installation, commissioning, operation
and maintenance of the converter.
Operation principle and hardware description describes the operation and construction of
the converter.
Mechanical installation instructs how to move, place and mount the converter.
Planning the electrical installation instructs in generator and cable selection, protective
functions of the converter and cable dimensioning and routing.
Electrical installation instructs in cabling and wiring of the converter.
Installation checklist contains a list for checking the mechanical and electrical installation
of the converter.
Maintenance contains preventive maintenance instructions.
The internal cooling circuit describes the cooling system of the converter.
Technical data contains the technical specifications of the converter, eg, ratings, frame
sizes and technical requirements and provisions for fulfilling the requirements for CE and
other markings.
Dimension drawings contains dimension drawings of the converter.
Related documents
See List of related manuals inside of the front cover.
Categorization by frame size and option code
This manual deals with the wind turbine converters made of the modules of the frame size
R8i. The frame size of each converter type is indicated in section Type equivalence table
on page 123.
The instructions, technical data and dimensional drawings which concern only certain
optional selections are marked with + codes (eg, +K454). The options included in the
converter can be identified from the + codes visible on the type designation label. The
+ code selections are listed in chapter Operation principle and hardware description under
Type designation key.

Introduction to the manual 19
Quick installation, commissioning and operation
flowchart
Task See / Action
Plan the installation. Check: ambient conditions,
ratings, required external cooling circuit arrangements,
input power connection, compatibility of the generator,
generator connection, etc.
Select the cables.
Technical data, page 121
Planning the electrical installation, page 53
Option manuals (if optional equipment is included)
Unpack and check the units.
Check the type code indicated on the type designation
label against the original order.
Checking the delivery, page 44
Check that all necessary optional modules and
equipment are present and correct.
If the converter has been non-operational for more than
one year, reform the converter DC link capacitors.
Contact your local ABB representative.
Only intact units may be started up!
Check the installation site. Checking the installation site, page 43
Route the cables. Routing the cables, page 62
Mount the cabinet line-up. Mechanical installation, page 43
Connect the liquid cooling connections. The internal cooling circuit, page 113
Check the insulation of the generator and the rotor
cable.
Checking the insulation of the assembly, page 67
Connect the power cables. Connect the control and the
auxiliary control cables.
Electrical installation, page 67
Check the installation. Installation checklist, page 87
Commission the converter. ACS800-67LC system description and start-up
guide [3AUA0000059432 (English)] and
ACS800-67(LC) doubly-fed induction generator
control program firmware manual
[3AUA0000071689 (English)]

20 Introduction to the manual
Terms and abbreviations
Term/Abbreviation Explanation
AGDR Gate driver control board (interface to IGBTs)
AINT Main Circuit Interface Board
AMC Application and Motor Controller Board. Part of the NDCU Drive Control Unit
APBU Optical branching unit for fiber links that use the PPCS protocol. The unit is used for
connecting parallel-connected inverter modules to the RDCU/NDCU.
APOW Power Supply Board
Auxiliary control
cubicle (ACU)
The cubicle with auxiliary devices such as auxiliary voltage circuit breakers, control
electronics, measurement boards, etc.
DC (brake) chopper Conducts the surplus energy from the intermediate circuit of the converter to the
DC (brake) resistor when necessary. The chopper operates when the DC link
voltage exceeds certain maximum limit. The voltage rise is typically caused by
deceleration (braking) of a high inertia generator. DC chopper type ABRU is used in
ACS800-67LC.
DC (brake) resistor Dissipates the converter surplus braking energy conducted by the DC chopper to
heat. Essential part of the chopper circuit. See DC (brake) chopper.
Converter Converts electric power from one form to another.
Cubicle One section of a cabinet-installed wind turbine converter. A cubicle is typically
behind a door of its own.
Crowbar Conducts the surplus energy from the rotor circuit of the converter to the resistor
when necessary. The crowbar operates when the DC link voltage or rotor circuit
current exceeds certain maximum limit. The voltage rise is typically caused by grid
failures like voltage dips (sags). Crowbar type ACBU is used in ACS800-67LC.
DC link DC circuit between grid-side converter and rotor-side converter
DC link capacitors Energy storage which stabilizes the intermediate circuit DC voltage.
DDCS Distributed Drives Communication System. Communication protocol used with fiber
optic link.
DTC Direct Torque Control
EMC Electromagnetic Compatibility
Frame (size) Refers to power modules that share a similar mechanical construction, for example:
• converter or converter/inverter modules of frame R8i
• frame 2×R8i + 1×R8i includes two size R8i inverter modules and one size R8i
supply module.
To determine the frame size of a component, refer to the rating tables in chapter
Technical data.
Grid-side converter A converter that is connected to the power supply network (grid) and is capable of
transferring energy from the converter DC link to the grid and vice versa. The grid-
side converter is also called ISU.
IGBT Insulated gate bipolar transistor
IGBT supply module Bidirectional IGBT bridge and related components enclosed inside a metal frame or
enclosure. Intended for cabinet installation. Used as the supply module in
regenerative and low-harmonic converters.
IGBT supply unit
(ISU)
Grid-side converter unit. Consists of the converter module and the related
accessories (such as fuses, switches, control unit, etc.). See IGBT supply module.