Rockwell Automation Allen-Bradley PowerFlex 520 Series User manual

PowerFlex 520-series
Adjustable Frequency AC Drive
Bulletin Numbers 25A series B, 25B
User Manual Original Instructions

2Rockwell Automation Publication 520-UM001K-EN-E - August 2021
PowerFlex 520-series Adjustable Frequency AC Drive User Manual
Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize
themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to
be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use
or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software
described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is
prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
SHOCKHAZARD:Labelsmaybeonor insidetheequipment,forexample,adriveormotor,toalertpeoplethatdangerousvoltage
may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARCFLASHHAZARD:Labelsmaybeonorinsidetheequipment,forexample,amotor controlcenter,toalertpeopletopotentialArc
Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL Regulatory
requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 3
Table of Contents
Preface
About This Publication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Download Firmware, AOP, EDS, and Other Files . . . . . . . . . . . . . . . . . . . . 9
Summary of Changes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Who Should Use this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Download Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Drive Frame Sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Catalog Number Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 1
Installation/Wiring Mounting Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Minimum Mounting Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Ambient Operating Temperatures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Current Derating Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Debris Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
AC Supply Source Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ungrounded Distribution Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Input Power Conditioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
General Grounding Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ground Fault Monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Safety Ground - (PE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Network Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Motor Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Shield Termination - SHLD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
RFI Filter Grounding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fuses and Circuit Breakers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fusing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Fuses and Circuit Breakers for PowerFlex 520-Series Drives . . . . . 24
Power and Control Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Control Module Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Power Module Terminal Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Power Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Motor Cable Types Acceptable for 100...600 Volt Installations . . . . 32
Reflected Wave Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Output Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Power Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Common Bus/Precharge Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Motor Start/Stop Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Signal and Control Wire Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Maximum Control Wire Recommendations. . . . . . . . . . . . . . . . . . . . 37

4Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Table of Contents
Control I/O Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
PowerFlex 523 Control I/O Terminal Block . . . . . . . . . . . . . . . . . . . . . 37
PowerFlex 525 Control I/O Terminal Block . . . . . . . . . . . . . . . . . . . . . 41
I/O Wiring Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Start and Speed Reference Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Start Source and Speed Reference Selection. . . . . . . . . . . . . . . . . . . . 48
Accel/Decel Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
CE Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Low Voltage Directive (2014/35/EU). . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
EMC Directive (2014/30/EU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Machinery Directive (2006/42/EC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
ATEX Directive (2014/34/EU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
General Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Chapter 2
Start Up Prepare for Drive Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Drive Startup Task List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Start, Stop, Direction, and Speed Control . . . . . . . . . . . . . . . . . . . . . . 59
Variable Torque Fan/Pump Applications . . . . . . . . . . . . . . . . . . . . . . . 59
Display and Control Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Control and Navigation Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Viewing and Editing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Drive Programming Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Language Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Smart Startup with Basic Program Group Parameters . . . . . . . . . . . . . . 63
LCD Display with QuickView Technology . . . . . . . . . . . . . . . . . . . . . . . . . 65
Using the USB Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
MainsFree Programming. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Using Drive Startup in CCW or Logix Designer application . . . . . . . . . 66
Chapter 3
Programming and Parameters About Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Parameter Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
AppView Parameter Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
CustomView Parameter Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Basic Display Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Basic Program Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Terminal Block Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Communications Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Logic Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Advanced Display Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Advanced Program Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Network Parameter Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Modified Parameter Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Fault and Diagnostic Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
AppView Parameter Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
CustomView Parameter Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Parameter Cross Reference by Name. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 5
Table of Contents
Chapter 4
Troubleshooting Drive Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Fault Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Manually Clearing Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Automatically Clearing Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Auto Restart (Reset/Run) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Fault Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Common Symptoms and Corrective Actions. . . . . . . . . . . . . . . . . . . . . . 162
Appendix A
Supplemental Drive Information Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Power Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Appendix B
Accessories and Dimensions Product Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Product Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Adapter Plate Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Optional Accessories and Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Installing a Communication Adapter . . . . . . . . . . . . . . . . . . . . . . . . 200
Removing a Communication Adapter . . . . . . . . . . . . . . . . . . . . . . . . 201
Appendix C
RS485 (DSI) Protocol Network Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Parameter Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Supported Modbus Function Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Writing (06) Logic Command Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Writing (06) Comm Frequency Command. . . . . . . . . . . . . . . . . . . . . . . . 207
Reading (03) Logic Status Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Reading (03) Drive Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Reading (03) Drive Operational Values . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Reading (03) and Writing (06) Drive Parameters . . . . . . . . . . . . . . . . . . 210
Additional Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Appendix D
Velocity StepLogic, Basic Logic
and Timer/Counter Functions
Velocity StepLogic Using Timed Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Velocity StepLogic Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Velocity StepLogic Using Basic Logic Functions . . . . . . . . . . . . . . . . . . . 212
Timer Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Counter Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Velocity StepLogic Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Appendix E
Encoder/Pulse Train Usage and
Position StepLogic Application
Encoder and Pulse Train Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Encoder Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

6Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Table of Contents
HTL/TTL DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Wiring Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Determine Encoder Pulse Per Revolution (PPR) Specification Based on
Speed Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Positioning Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Common Guidelines for All Applications . . . . . . . . . . . . . . . . . . . . . . . . . 220
Positioning Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Homing Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Encoder and Position Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Use Over Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Setup Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Appendix F
PID Set Up PID Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Exclusive Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Trim Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
PID Reference and Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Analog PID Reference Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Scale Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Invert Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
PID Deadband . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
PID Preload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
PID Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
PID Gains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Guidelines for Adjusting the PID Gains . . . . . . . . . . . . . . . . . . . . . . . 234
Appendix G
Safe Torque Off Function PowerFlex 525 Safe-Torque-Off Overview . . . . . . . . . . . . . . . . . . . . . . . . 237
EC Type Examination Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
EMC Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Using PowerFlex 525 Safe-Torque-Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Safety Concept. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Important Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Functional Proof Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
PFD and PFH Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Safety Reaction Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Enabling PowerFlex 525 Safe-Torque-Off. . . . . . . . . . . . . . . . . . . . . . . . . 241
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
PowerFlex 525 Safe-Torque-Off Operation. . . . . . . . . . . . . . . . . . . . . . . . 242
Verify Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Discrepancy Time of the Safety Inputs. . . . . . . . . . . . . . . . . . . . . . . . 242
Connection Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Example 1 – Safe-Torque-Off Connection with Coast-to-Stop Action,
SIL 2/PL d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 243
Example 2 – Safe-Torque-Off Connection with Controlled Stop
Action, SIL 2/PL d. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Example 3 – Safe-Torque-Off Connection with Coast-to-Stop Action
Using External +24V supply, SIL 3/PL e . . . . . . . . . . . . . . . . . . . . . . . 246
PowerFlex 525 Certification for Safe-Torque-Off . . . . . . . . . . . . . . . . . . 246

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 7
Table of Contents
Appendix H
EtherNet/IP Establishing A Connection With EtherNet/IP. . . . . . . . . . . . . . . . . . . . . 247
Ground Connections for EtherNet/IP Networks . . . . . . . . . . . . . . . . . . 248
Appendix I
Control Diagrams Induction Motor Tuning Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Adjusting Speed Control Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Appendix J
PowerFlex 525 PM Motor
Configuration
Motor Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Motor Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 252
Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Stop Mode/Brake Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
Direction Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Auto Tune. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Manual Configuration Using Drive Keypad. . . . . . . . . . . . . . . . . . . . . . . 256
Additional PM Motor Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
Additional Setup for Open Loop PM Motor. . . . . . . . . . . . . . . . . . . . 257
Additional Setup for Closed Loop PM Motor. . . . . . . . . . . . . . . . . . . 259
Optional Parameter Adjustments for Optimum Performance . . . . . . 261
Appendix K
PowerFlex 525 Synchronous
Reluctance Motor Configuration
SynRM Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Control Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
SynRM Control Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Index
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

8Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Table of Contents
Notes:

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 9
Preface
About This Publication The purpose of this manual is to provide you with the basic information
needed to install, start-up and troubleshoot the PowerFlex® 520-Series
Adjustable Frequency AC Drive.
Download Firmware, AOP,
EDS, and Other Files
Download firmware, associated files (such as AOP, EDS, and DTM), and access
product release notes from the Product Compatibility and Download Center at
rok.auto/pcdc.
See Download Files on page 10 to download the files for your PowerFlex 525
drive.
Summary of Changes This publication contains the following new or updated information. This list
includes substantive updates only and is not intended to reflect all changes.
Topic Page
Summary of Changes 9
Additional Resources 10
Manual Conventions 11
Drive Frame Sizes 12
General Precautions 13
Catalog Number Explanation 14
Topic Page
Removed column “Min Enclosure Vol” from Fuses and Circuit Breaker tables 24…27
Updated C2 and C3 categories external requirements in PowerFlex 520-Series RF Emission
Compliance and Installation Requirements table 54
Added footnote on EMC enclosure dimension 55
Corrected PCR with ID 1018 on description of P043 [Minimum Freq] 85
Corrected PCR with ID 1539 on fractional parameters.
• Added t071 [Opto Out1 LevelF] and t074 [Opto Out2 LevelF]
• Added t078 [RelayOut1 LevelF] and t083 [RelayOut2 LevelF]
• Added L201 [Step Units F 0], L203 [Step Units F 1], L205 [Step Units F 2], L207 [Step Units F
3], L209 [Step Units F 4], L2011 [Step Units F 5], L213 [Step Units F6], and L215 [Step Units F 7]
• Updated d366 [Timer StatusF]
• Updated d377 [Speed Feedback F]
• Updated d379 [Encoder Speed F]
• Updated d389 [Units Traveled L]
92
94
108
109
110
111
112
Corrected PCR with ID 1541 on parameter reference t105 [Safety Open En] for Fault F059 160
Added Efficiency Class certification based on Ecodesign Regulation (EU) 2019/1781 165
Updated Input Current Scaling section and table to improve clarity 171
Added column “For 150 m” to EMC Line Filters table 175

10 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Preface
Who Should Use this Manual This manual is intended for qualified personnel. You must be able to program
and operate Adjustable Frequency AC Drive devices. In addition, you must
have an understanding of the parameter settings and functions.
Additional Resources All recommended documentation that is listed in this section is available
online at rok.auto/literature.
The following publications provide general drive information:
The following publications provide specific PowerFlex 520-Series information
on drive installation, features, specifications, and service:
The following publications provide specific Network Communications
information:
Download Files Follow these steps to download the files for your PowerFlex 525 drive.
1. Go to the Rockwell Automation Product Compatibility and Download
Center at rok.auto/pcdc.
Title Publication
Wiring and Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives DRIVES-IN001
Preventive Maintenance of Industrial Control and Drive System Equipment DRIVES-TD001
Safety Guidelines for the Application, Installation, and Maintenance of solid-state Control SGI-1.1
Guarding Against Electrostatic Damage 8000-SB001
Title Publication
PowerFlex 520-Series AC Drive Specifications 520-TD001
PowerFlex Dynamic Braking Resistor Calculator PFLEX-AT001
PowerFlex AC Drives in Common Bus Configurations DRIVES-AT002
Title Publication
PowerFlex 525 Embedded EtherNet/IP Adapter 520COM-UM001
PowerFlex 25-COMM-D DeviceNet Adapter 520COM-UM002
PowerFlex 25-COMM-E2P Dual-Port EtherNet/IP Adapter 520COM-UM003
PowerFlex 25-COMM-P PROFIBUS DPV1 Adapter 520COM-UM004

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 11
Preface
2. Click the Find Downloads link.
3. Enter “PowerFlex 525” into the Product Search field.
The results appears in the box below.
4. Select the entry and the firmware revision, then click Downloads.
5. Click the Show Downloads icon, then click the links to download
the firmware revision and AOP files to your computer.
Manual Conventions • In this manual we refer to PowerFlex 520-Series Adjustable Frequency
AC Drive as; drive, PowerFlex 520-series, PowerFlex 520-series drive or
PowerFlex 520-series AC drive.
• Specific drives within the PowerFlex 520-series may be referred to as:
– PowerFlex 523, PowerFlex 523 drive or PowerFlex 523 AC drive.
– PowerFlex 525, PowerFlex 525 drive or PowerFlex 525 AC drive.
IMPORTANT You must sign in to the Rockwell Automation website before
downloading a firmware revision.

12 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Preface
• Parameter numbers and names are shown in this format:
• The following words are used throughout the manual to describe an
action:
• The Studio 5000® Engineering and Design Environment combines
engineering and design elements into a common environment. The
first element in the Studio 5000 environment is the Logix Designer
application. The Studio 5000 Logix Designer® application is the
rebranding of RSLogix 5000® software and will continue to be the
product to program Logix 5000™ controllers for discrete, process,
batch, motion, safety, and drive-based solutions. The Studio 5000
environment is the foundation for the future of Rockwell Automation®
engineering design tools and capabilities. It is the one place for design
engineers to develop all the elements of their control system.
Drive Frame Sizes Similar PowerFlex 520-series drive sizes are grouped into frame sizes to
simplify spare parts ordering, dimensioning, and so on. A cross-reference of
drive catalog numbers and their respective frame sizes is provided in
Appendix B.
P 031 [Motor NP Volts]
Name
Number
Group
b
P
t
C
L
d
A
N
M
f
G
= Basic Display
= Basic Program
= Terminal Blocks
= Communications
= Logic
= Advanced Display
= Advanced Program
= Network
= Modified
= Fault and Diagnostic
= AppView and CustomView
Words Meaning
Can Possible, able to do something
Cannot Not possible, not able to do something
May Permitted, allowed
Must Unavoidable, you must do this
Shall Required and necessary
Should Recommended
Should Not Not Recommended

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 13
Preface
General Precautions ATTENTION: The drive contains high voltage capacitors which take time to
dischargeafter removalofmains supply.After power hasbeen removedfrom
the drive, wait three minutes to make sure DC bus capacitors are discharged.
Afterthreeminutes,verifyACvoltageL1,L2,L3(LinetoLineandLinetoGround)
toensuremainspowerhasbeendisconnected.MeasureDCvoltageacrossDC-
and DC+ bus terminals to verify DC Bus has discharged to zero volts. Measure
DCvoltagefromL1,L2,L3,T1,T2,T3DC–andDC+terminalstogroundandkeep
the meter on the terminals until the voltage discharges to zero volts. The
discharge process may take several minutes to reach zero volts.
DarkeneddisplayLEDsisnotanindication thatcapacitorshavedischargedto
safe voltage levels.
ATTENTION: Only qualified personnel familiar with adjustable frequency AC
drives and associated machinery should plan or implement the installation,
start-up and subsequent maintenance of the system. Failure to comply may
result in personal injury and/or equipment damage.
ATTENTION:ThisdrivecontainsESD(ElectrostaticDischarge)sensitiveparts
andassemblies.Staticcontrolprecautionsarerequiredwheninstalling,testing,
servicing or repairing this assembly. Component damage may result if ESD
control procedures are not followed. If you are not familiar with static control
procedures, reference A-B publication 8000-4.5.2, “Guarding Against
Electrostatic Damage” or any other applicable ESD protection handbook.
ATTENTION: Anincorrectly applied or installeddrivecanresultin component
damage or a reduction in product life. Wiring or application errors, such as
undersizingthemotor,incorrectorinadequateACsupply,orexcessiveambient
temperatures may result in malfunction of the system.
ATTENTION: The bus regulator function is extremely useful for preventing
nuisance overvoltage faults resulting from aggressive decelerations,
overhaulingloads,andeccentricloads.However,itcanalsocauseeitherofthe
following two conditions to occur.
1. Fast positive changes in input voltage or imbalanced input voltages can
cause uncommanded positive speed changes;
2.Actualdecelerationtimescanbelongerthancommandeddecelerationtimes
However, a “Stall Fault” is generated if the drive remains in this state for 1
minute. If this condition is unacceptable, the bus regulator must be disabled
(seeparameterA550 [Bus RegEnable]). Inaddition,installinga properlysized
dynamic brake resistor will provide proper stopping requirements based on
braking resistor sizing.
ATTENTION:Riskofinjuryorequipmentdamageexists.Drivedoesnotcontain
user-serviceable components. Do not disassemble drive chassis.

14 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Preface
Catalog Number Explanation
Code Type
25A PowerFlex 523
25B PowerFlex 525
1-3 4 5 6-8 9 10 11 12 13 14
25B – B 2P3 N 1 1 4 – –
Drive Dash Voltage Rating Rating Enclosure Reserved Emission Class Reserved Dash Dash
Output Current @ 1 Phase, 100...120V Input
Code Amps Frame ND HD
HP kW HP kW
1P6(1) 1.6 A 0.25 0.2 0.25 0.2
2P5 2.5 A 0.5 0.4 0.5 0.4
4P8 4.8 B 1.0 0.75 1.0 0.75
6P0 6.0 B 1.5 1.1 1.5 1.1
Output Current @ 1 Phase, 200...240V Input
Code Amps Frame ND HD
HP kW HP kW
1P6(1) 1.6 A 0.25 0.2 0.25 0.2
2P5 2.5 A 0.5 0.4 0.5 0.4
4P8 4.8 A 1.0 0.75 1.0 0.75
8P0 8.0 B 2.0 1.5 2.0 1.5
011 11.0 B 3.0 2.2 3.0 2.2
Output Current @ 3Phase, 200...240V Input
Code Amps Frame ND HD
HP kW HP kW
1P6(1) 1.6 A 0.25 0.2 0.25 0.2
2P5 2.5 A 0.5 0.4 0.5 0.4
5P0 5.0 A 1.0 0.75 1.0 0.75
8P0 8.0 A 2.0 1.5 2.0 1.5
011 11.0 A 3.0 2.2 3.0 2.2
017 17.5 B 5.0 4.0 5.0 4.0
024 24.0 C 7.5 5.5 7.5 5.5
032 32.2 D 10.0 7.5 10.0 7.5
048(2) 48.3 E15.0 11.0 10.0 7.5
062(2) 62.1 E20.0 15.0 15.0 11.0
Output Current @ 3 Phase, 380...480V Input
Code Amps Frame ND HD
HP kW HP kW
1P4 1.4 A 0.5 0.4 0.5 0.4
2P3 2.3 A 1.0 0.75 1.0 0.75
4P0 4.0 A 2.0 1.5 2.0 1.5
6P0 6.0 A 3.0 2.2 3.0 2.2
010 10.5 B 5.0 4.0 5.0 4.0
013 13.0 C 7.5 5.5 7.5 5.5
017 17.0 C 10.0 7.5 10.0 7.5
024 24.0 D 15.0 11.0 15.0 11.0
030(2) 30.0 D20.0 15.0 15.0 11.0
037(2) 37.0 E25.0 18.5 20.0 15.0
043(2) 43.0 E30.0 22.0 25.0 18.5
Output Current @ 3 Phase, 525...600V Input
Code Amps Frame ND HD
HP kW HP kW
0P9 0.9 A 0.5 0.4 0.5 0.4
1P7 1.7 A 1.0 0.75 1.0 0.75
3P0 3.0 A 2.0 1.5 2.0 1.5
4P2 4.2 A 3.0 2.2 3.0 2.2
6P6 6.6 B 5.0 4.0 5.0 4.0
9P9 9.9 C 7.5 5.5 7.5 5.5
012 12.0 C 10.0 7.5 10.0 7.5
019 19.0 D 15.0 11.0 15.0 11.0
022(2) 22.0 D20.0 15.0 15.0 11.0
027(2) 27.0 E25.0 18.5 20.0 15.0
032(2) 32.0 E30.0 22.0 25.0 18.5
Code Enclosure
NIP20NEMA/Open
Code Interface Module
1Standard
Code EMC Filter
0 No Filter
1 Filter
Code Braking
4Standard
(1) This rating is only available for PowerFlex 523 drives.
(2) Normal and Heavy-Duty ratings are available for this drive.
Code Voltage Phase
V120VAC1
A240VAC1
B240VAC3
D480VAC3
E600VAC3

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 15
Chapter 1
Installation/Wiring
This chapter provides information on mounting and wiring the PowerFlex
520-series drives.
Most startup difficulties are the result of incorrect wiring. Every precaution
must be taken to assure that the wiring is done as instructed. All items must be
read and understood before the actual installation begins.
Mounting Considerations • Mount the drive upright on a flat, vertical, and level surface.
• Protect the cooling fan by avoiding dust or metallic particles.
• Do not expose to a corrosive atmosphere.
• Protect from moisture and direct sunlight.
Topic Page
Mounting Considerations 15
AC Supply Source Considerations 19
General Grounding Requirements 20
Fuses and Circuit Breakers 22
Power and Control Module 28
Control Module Cover 30
Power Module Terminal Guard 31
Power Wiring 32
Power Terminal Block 35
Common Bus/Precharge Notes 35
I/O Wiring 36
Control I/O Terminal Block 37
Start and Speed Reference Control 48
CE Conformity 51
ATTENTION:Thefollowinginformationismerelyaguideforproperinstallation.
Rockwell Automation cannot assume responsibility for the compliance or the
noncompliance to any code, national, local or otherwise for the proper
installation of this drive or associated equipment. A hazard of personal injury
and/or equipment damage exists if codes are ignored during installation.
Frame Screw Size Screw Torque
A M5 (#10...24) 1.56...1.96 N•m (14...17 lb•in)
B M5 (#10...24) 1.56...1.96 N•m (14...17 lb•in)
C M5 (#10...24) 1.56...1.96 N•m (14...17 lb•in)
D M5 (#10...24) 2.45...2.94 N•m (22...26 lb•in)
E M8 (5/16 in.) 6.0...7.4 N•m (53...65 lb•in)

16 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Chapter 1 Installation/Wiring
Minimum Mounting Clearances
See Product Dimensions on page 184 for mounting dimensions.
(1) For Frame E with Control Module Fan Kit only, clearance of 95 mm (3.7 in.) is required.
(2) For Frame E with Control Module Fan Kit only, clearance of 12 mm (0.5 in.) is required.
25 mm
(1.0 in.)
25 mm
(1.0 in.) (2)
(2)
25 mm
(1.0 in.)
50 mm
(2.0 in.)
50 mm
(2.0 in.)(1) 50 mm (2.0 in.)(1)
50 mm
(2.0 in.)(1)
50 mm
(2.0 in.)
50 mm
(2.0 in.) 50 mm
(2.0 in.)
Esc
Sel
Esc
Sel
Esc
Sel
Esc
Sel
50 mm
(2.0 in.) 50 mm
(2.0 in.)
50 mm
(2.0 in.)
50 mm
(2.0 in.)
Esc
Sel
Esc
Sel
50 mm
(2.0 in.)
50 mm
(2.0 in.)
50 mm
(2.0 in.) 50 mm
(2.0 in.)
50 mm
(2.0 in.)(1)
Esc
Sel
Esc
Sel
Esc
Sel
Esc
Sel
Esc
Sel
Esc
Sel
Vertical, Zero Stacking
No clearance between drives.
Horizontal, Zero Stacking with
Control Module Fan Kit
No clearance between drives.
Vertical Vertical, Zero Stacking with
Control Module Fan Kit
No clearance between drives.
Vertical with Control Module Fan Kit
Horizontal with Control Module Fan Kit

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 17
Chapter 1 Installation/Wiring
Ambient Operating Temperatures
For optional accessories and kits, see Accessories and Dimensions on page 173.
Current Derating Curves
Vertical Mounting
Horizontal/Floor Mounting
Mounting Enclosure Rating(1)
Ambient Temperature
Minimum Maximum (No Derate) Maximum (Derate)(2) Maximum with
Control Module Fan Kit (Derate)(3)(5)
Vertical IP 20/Open Type
-20 °C (-4 °F)
50 °C (122 °F) 60 °C (140 °F) 70 °C (158 °F)
IP 30/NEMA 1/UL Type 1 45 °C (113 °F) 55 °C (131 °F) –
Vertical, Zero Stacking IP 20/Open Type 45 °C (113 °F) 55 °C (131 °F) 65 °C (149 °F)
IP 30/NEMA 1/UL Type 1 40 °C (104 °F) 50 °C (122 °F) –
Horizontal with
Control Module Fan Kit(4)(5) IP 20/Open Type 50 °C (122 °F) – 70 °C (158 °F)
Horizontal, Zero Stacking
with Control Module Fan Kit(4)(5) IP 20/Open Type 45 °C (113 °F) – 65 °C (149 °F)
(1) IP 30/NEMA 1/UL Type 1 rating requires installation of the PowerFlex 520-Series IP 30/NEMA 1/UL Type 1 option kit, catalog number 25-JBAx.
(2) For catalogs 25x-D1P4N104 and 25x-E0P9N104, the temperature listed under the Maximum (Derate) column is reduced by 5 °C (9 °F) for all mounting methods.
(3) For catalogs 25x-D1P4N104 and 25x-E0P9N104, the temperature listed under the Maximum with Control Module Fan Kit (Derate) column is reduced by 10 °C (18 °F) for vertical and vertical with
zero stacking mounting methods only.
(4) Catalogs 25x-D1P4N104 and 25x-E0P9N104 cannot be mounted using either of the horizontal mounting methods.
(5) Requires installation of the PowerFlex 520-Series Control Module Fan Kit, catalog number 25-FANx-70C.
Ambient Temperature (°C)
40
100
90
110
120
80
70
60
50
45403530 60 65 70 75 80 5550
Percentage of Rated Current (%)
IP 30/NEMA 1 with Control
Module Fan Kit
IP 20/Open Type
Ambient Temperature (°C)
40
100
90
110
120
80
70
60
50
45403530 60 65 70 75 80 5550
Percentage of Rated Current (%)
IP 30/NEMA 1 with Control
Module Fan Kit
IP 20/Open Type
Single Drive Zero Stacking
Ambient Temperature (°C)
40
100
90
120
110
80
70
60
50
30 35 70 75 80 60 6550 5540 45
Percentage of Rated Current (%)
with Control
Module Fan Kit
IP 20/Open Type
Ambient Temperature (°C)
40
100
90
120
110
80
70
60
50
30 35 70 75 80 60 6550 5540 45
Percentage of Rated Current (%)
with Control
Module Fan Kit
IP 20/Open Type
Single Drive Zero Stacking

18 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Chapter 1 Installation/Wiring
Derating Guidelines for High Altitude
The drive can be used without derating at a maximum altitude of
1000 m (3300 ft). If the drive is used above 1000 m (3300 ft):
• Derate the maximum ambient temperature by 5 °C (9 °F for every
additional 1000 m (3300 ft), subject to limits listed in the Altitude Limit
(Based on Voltage) table below.
Or
• Derate the output current by 10% for every additional 1000 m (3300 ft),
up to 3000 m (9900 ft), subject to limits listed in the Altitude Limit (Based
on Voltage) table below.
High Altitude
Debris Protection
Take precautions to prevent debris from falling through the vents of the drive
housing during installation.
Storage
• Store within an ambient temperature range of -40...85 °C(1).
• Store within a relative humidity range of 0...95%, noncondensing.
• Do not expose to a corrosive atmosphere.
(1) The maximum ambient temperature for storing a Frame E drive is 70 °C.
Altitude Limit (Based on Voltage)
Drive Rating Center Ground (Wye Neutral) Corner Ground, Impedance Ground,
or Ungrounded
100...120V 1-Phase 6000 m 6000 m
200...240V 1-Phase 2000 m 2000 m
200...240V 3-Phase 6000 m 2000 m
380...480V 3-Phase 4000 m 2000 m
525...600V 3-Phase 2000 m 2000 m
Altitude (m)
Percentage of Rated Current (%)
40
90
100
110
120
80
70
60
50
04000 300020001000
Altitude (m)
Ambient Temperature (°C)
20
50
60
40
30
04000 300020001000

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 19
Chapter 1 Installation/Wiring
AC Supply Source
Considerations
Ungrounded Distribution Systems
Disconnecting MOVs
To prevent drive damage, the MOVs connected to ground shall be
disconnected if the drive is installed on an ungrounded distribution system (IT
mains) where the line-to-ground voltages on any phase could exceed 125% of
the nominal line-to-line voltage. To disconnect these devices, remove the
jumper shown in the diagrams below.
1. Turn the screw counterclockwise to loosen.
2. Pull the jumper completely out of the drive chassis.
3. Tighten the screw to keep it in place.
Jumper Location (Typical)
Phase to Ground MOV Removal
ATTENTION: PowerFlex 520-series drives contain protective MOVs that are
referenced to ground. These devices must be disconnected if the drive is
installed on an ungrounded or resistive grounded distribution system.
ATTENTION: Removing MOVs in drives with an embedded filter will also
disconnect the filter capacitor from earth ground.
IMPORTANT Tighten screw after jumper removal.
Power Module
R/L1
S/L2
T/L3
1234
Three-Phase
AC Input
Jumper

20 Rockwell Automation Publication 520-UM001K-EN-E - August 2021
Chapter 1 Installation/Wiring
Input Power Conditioning
The drive is suitable for direct connection to input power within the rated
voltage of the drive (see page 167). Listed in the Input Power Conditions table
below are certain input power conditions which may cause component
damage or reduction in product life. If any of these conditions exist, install one
of the devices listed under the heading Corrective Action on the line side of the
drive.
General Grounding
Requirements
The drive Safety Ground - (PE) must be connected to system ground.
Ground impedance must conform to the requirements of national and local
industrial safety regulations and/or electrical codes. The integrity of all ground
connections should be periodically checked.
Typical Grounding
Ground Fault Monitoring
If a system ground fault monitor (RCD) is to be used, only Type B (adjustable)
devices should be used to avoid nuisance tripping.
IMPORTANT Onlyonedevice perbranchcircuitisrequired.Itshouldbemountedclosest
to the branch and sized to handle the total current of the branch circuit.
Input Power Conditions
Input Power Condition Corrective Action
Low Line Impedance (less than 1% line reactance) • Install Line Reactor(1)
• or Isolation Transformer
(1) See Appendix B for accessory ordering information.
Greater than 120 kVA supply transformer
Line has power factor correction capacitors • Install Line Reactor(1)
• or Isolation Transformer
Line has frequent power interruptions
Line has intermittent noise spikes in excess of 6000V (lightning)
Phase to ground voltage exceeds 125% of normal line-to-line voltage • Remove MOV jumper to ground.
• or Install Isolation Transformer with
grounded secondary if necessary.
Ungrounded distribution system
B-phase grounded distribution system
240V open delta configuration (stinger leg)(2)
(2) For drives applied on an open delta with a middle phase grounded neutral system, the phase opposite the phase that is
tapped in the middle to the neutral or earth is referred to as the “stinger leg,” “high leg,” “red leg,” etc. This leg should be
identified throughout the system with red or orange tape on the wire at each connection point. The stinger leg should be
connected to the center Phase B on the reactor. See Bulletin 1321-3R Series Line Reactors on page 183 for specific line
reactor part numbers.
• Install Line Reactor(1)
SHLD
U/T1
V/T2
W/T3
R/L1
S/L2
T/L3
Esc
Sel