| Вид документа | Інструкція з експлуатації |
|---|---|
| Виробник | SIEMENS |
| Код документа | SINAMICS-G120C_Instruction_manual |
| Сторінок | 480 |
| Мова документа | англійська |
| Розмір файлу | 17.9 МБ |
Текст документа
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Changes in the current
edition
Fundamental safety
instructions 1
SINAMICS Introduction 2
Description 3
SINAMICS G120C
SINAMICS G120C Converters
Installing 4
Commissioning 5
Operating Instructions
Uploading the converter
settings 6
Protecting the converter
settings 7
Advanced commissioning 8
Alarms, faults and system
messages 9
Corrective maintenance 10
Technical data 11
Appendix A
Edition 02/2026, Firmware 4.7 SP14
02/2026, FW V4.7 SP14
A5E34263257B AM
Legal information
Warning notice system
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
DANGER
indicates that death or severe personal injury will result if proper precautions are not taken.
WARNING
indicates that death or severe personal injury may result if proper precautions are not taken.
CAUTION
indicates that minor personal injury can result if proper precautions are not taken.
NOTICE
indicates that property damage can result if proper precautions are not taken.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will
be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to
property damage.
Qualified Personnel
The product/system described in this documentation may be operated only by personnel qualified for the specific
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Qualified persons are those who, because of their training and experience, are familiar with the installation,
assembly, commissioning, operation, decommissioning and disassembly of the product and can recognize risks
and avoid possible hazards.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the application described in the catalog and the associated usage
information. If products and components from other manufacturers are used, these must be recommended or
approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance
are required to ensure that the products operate safely and without any problems. The permissible ambient
conditions must be complied with. The information in the relevant documentation must be observed.
Trademarks
All names identified by ® are registered trademarks of Siemens Aktiengesellschaft. The remaining trademarks in
this publication may be trademarks whose use by third parties for their own purposes could violate the rights of
the owner.
Disclaimer of Liability
We have reviewed the contents of this publication to ensure consistency with the hardware and software
described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the
information in this publication is reviewed regularly and any necessary corrections are included in subsequent
editions.
Siemens Aktiengesellschaft A5E34263257B AM Copyright © Siemens 2011 - 2026.
Digital Industries Ⓟ 01/2026 Subject to change All rights reserved
Postfach 48 48
90026 NÜRNBERG
GERMANY
Changes in the current edition
Significant changes with respect to Operating Instructions, Edition 10/2020
Corrections
Error correction and editorial revision
New functions
SINAMICS G115D converter now supports the extended function 'Safety Limited Speed (SLS)'
with the firmware version V4.7 SP14.
Overview of new and modified function in firmware V4.7 SP14:
Firmware version 4.7 SP14 (Page 457)
SINAMICS G120C Converters
Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM 3
Changes in the current edition
SINAMICS G120C Converters
4 Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM
Table of contents
Changes in the current edition .............................................................................................................. 3
1 Fundamental safety instructions......................................................................................................... 13
1.1 General safety instructions................................................................................................. 13
1.2 Product damage due to electric fields or electrostatic discharge .......................................... 20
1.3 Warranty and liability for application examples ................................................................... 20
1.4 Cybersecurity information .................................................................................................. 20
1.5 Residual risks of power drive systems ................................................................................. 22
2 Introduction ......................................................................................................................................... 25
2.1 About the Manual .............................................................................................................. 25
2.2 Guide through the manual ................................................................................................. 26
3 Description........................................................................................................................................... 29
3.1 Intended use...................................................................................................................... 29
3.2 OpenSSL ............................................................................................................................ 29
3.3 Transferring OpenOSS license terms to a PC........................................................................ 29
3.4 Scope of delivery converters FSAA ... FSC ........................................................................... 30
3.5 Scope of delivery converters FSD ... FSF.............................................................................. 32
3.6 Directives and standards .................................................................................................... 34
3.7 Optional components ........................................................................................................ 36
3.8 Motors and multi-motor drives that can be operated........................................................... 41
4 Installing .............................................................................................................................................. 43
4.1 Installing the label for the North American market.............................................................. 43
4.2 EMC-compliant setup of the machine or plant .................................................................... 43
4.2.1 Control cabinet .................................................................................................................. 44
4.2.2 Cables ............................................................................................................................... 46
4.2.3 Electromechanical components.......................................................................................... 49
4.3 Mounting base components............................................................................................... 50
4.4 Mounting the converter ..................................................................................................... 53
4.5 Mounting the line reactor .................................................................................................. 60
4.6 Mounting the output reactor.............................................................................................. 62
4.7 Mount dU/dt filter plus Voltage Peak Limiter ....................................................................... 65
4.8 Mounting the braking resistor ............................................................................................ 66
4.9 Connect the line supply, motor and braking resistor............................................................ 68
SINAMICS G120C Converters
Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM 5
Table of contents
4.9.1 Permissible line supplies..................................................................................................... 68
4.9.1.1 TN line system ................................................................................................................... 69
4.9.1.2 TT line system.................................................................................................................... 70
4.9.1.3 IT system ........................................................................................................................... 71
4.9.2 Requirements for the protective conductor ......................................................................... 71
4.9.3 Installation after a long storage time .................................................................................. 73
4.9.4 Connecting the converter and converter components to the supply .................................... 75
4.9.5 Branch circuit protection .................................................................................................... 81
4.9.6 Operation with residual current protective device (RCD)...................................................... 83
4.9.7 Maximum permissible motor cable length .......................................................................... 85
4.9.8 Connecting the motor to the converter in a star or delta connection ................................... 86
4.10 Connecting the interfaces for the converter control ............................................................ 87
4.10.1 Overview of the interfaces ................................................................................................. 87
4.10.2 Fieldbus interface assignment ............................................................................................ 89
4.10.3 Terminal strips ................................................................................................................... 90
4.10.4 Factory setting of the interfaces ......................................................................................... 94
4.10.5 Default setting of the interfaces ......................................................................................... 97
4.10.6 Failsafe digital input......................................................................................................... 106
4.10.7 Connecting a failsafe digital input .................................................................................... 108
4.10.8 Wiring terminal strips....................................................................................................... 110
4.10.8.1 Connecting the cable shields (FSAA … FSC) ...................................................................... 112
4.10.8.2 Connecting cable shields (FSD … FSF) .............................................................................. 113
4.10.9 Fieldbus interfaces........................................................................................................... 114
4.10.10 Connecting the converter to PROFINET ............................................................................. 114
4.10.10.1 Communication via PROFINET IO and Ethernet ................................................................. 114
4.10.10.2 Connecting the PROFINET cable to the converter .............................................................. 116
4.10.10.3 What do you have to set for communication via PROFINET?............................................... 116
4.10.10.4 Installing GSDML ............................................................................................................. 117
4.10.11 Connecting the converter to PROFIBUS ............................................................................. 118
4.10.11.1 Connecting the PROFIBUS cable to the converter .............................................................. 118
4.10.11.2 What do you have to set for communication via PROFIBUS? .............................................. 119
4.10.11.3 Installing the GSD ............................................................................................................ 120
4.10.11.4 Set the PROFIBUS address................................................................................................. 120
4.11 Connecting a motor holding brake ................................................................................... 122
4.12 Monitoring the temperature of the braking resistor .......................................................... 122
5 Commissioning .................................................................................................................................. 125
5.1 Commissioning guidelines ............................................................................................... 125
5.2 Tools to commission the converter ................................................................................... 126
5.3 Preparing for commissioning............................................................................................ 127
5.3.1 Collecting motor data ...................................................................................................... 127
5.3.2 Converter factory setting.................................................................................................. 128
5.3.3 Minimum and maximum speed........................................................................................ 129
5.4 Quick commissioning using the BOP-2 operator panel ...................................................... 130
5.4.1 Overview ......................................................................................................................... 131
5.4.2 Starting quick commissioning .......................................................................................... 132
5.4.3 Select the application class............................................................................................... 132
5.4.4 Standard Drive Control ..................................................................................................... 134
5.4.5 Dynamic Drive Control ..................................................................................................... 136
SINAMICS G120C Converters
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Table of contents
5.4.6 Expert.............................................................................................................................. 139
5.4.7 Identifying the motor data and optimizing the closed-loop control.................................... 143
5.5 Quick commissioning with a PC........................................................................................ 144
5.5.1 Creating a project ............................................................................................................ 144
5.5.2 Transfer converters connected via USB into the project ..................................................... 145
5.5.3 Go online and start the commissioning Wizard ................................................................. 146
5.5.4 Overview of quick commissioning .................................................................................... 147
5.5.5 Commissioning wizard ..................................................................................................... 148
5.5.6 Standard Drive Control ..................................................................................................... 150
5.5.7 Dynamic Drive Control ..................................................................................................... 152
5.5.8 Expert.............................................................................................................................. 154
5.5.9 Identify motor data .......................................................................................................... 157
5.6 Restoring the factory setting ............................................................................................ 159
5.6.1 Resetting the safety functions to the factory setting.......................................................... 160
5.6.2 Restore the factory settings (without safety functions)...................................................... 162
5.7 Series commissioning ...................................................................................................... 163
5.8 Handling the BOP 2 operator panel................................................................................... 164
5.8.1 Menu structure, symbols and keys.................................................................................... 164
5.8.2 Switching the motor on and off ........................................................................................ 165
5.8.3 Changing parameter values.............................................................................................. 166
5.8.4 Changing indexed parameters.......................................................................................... 167
5.8.5 Entering the parameter number directly ........................................................................... 168
5.8.6 Entering the parameter value directly ............................................................................... 169
5.8.7 Why can a parameter value not be changed? .................................................................... 170
6 Uploading the converter settings ...................................................................................................... 171
6.1 Why does an upload make sense?..................................................................................... 171
6.2 Uploading to the memory card......................................................................................... 171
6.2.1 Recommended memory cards .......................................................................................... 171
6.2.2 Automatic upload ............................................................................................................ 172
6.2.3 Message for a memory card that is not inserted................................................................ 174
6.2.4 Manual upload with Startdrive ......................................................................................... 174
6.2.5 Manual upload with BOP-2............................................................................................... 175
6.2.6 Safely removing a memory card using the BOP-2 .............................................................. 176
6.2.7 Safely remove the memory card with Startdrive................................................................ 177
6.3 Uploading to the BOP-2.................................................................................................... 178
6.4 Upload to a PC using Startdrive ........................................................................................ 179
6.5 More options for the upload............................................................................................. 179
7 Protecting the converter settings ...................................................................................................... 181
7.1 Write protection ............................................................................................................... 181
7.2 Know-how protection ...................................................................................................... 182
7.2.1 Extending the exception list for know-how protection ...................................................... 186
7.2.2 Activating and deactivating know-how protection ............................................................ 187
8 Advanced commissioning.................................................................................................................. 189
8.1 Overview of the converter functions................................................................................. 189
SINAMICS G120C Converters
Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM 7
Table of contents
8.2 Brief description of the parameters................................................................................... 191
8.3 Sequence control when switching the motor on and off.................................................... 192
8.4 Adapt the default setting of the terminal strip .................................................................. 194
8.4.1 Digital inputs ................................................................................................................... 195
8.4.2 Analog input as digital input ............................................................................................ 196
8.4.3 Failsafe digital inputs ....................................................................................................... 196
8.4.4 Digital outputs ................................................................................................................. 198
8.4.5 Analog input.................................................................................................................... 200
8.4.6 Adjusting characteristics for analog input ......................................................................... 201
8.4.7 Setting the deadband....................................................................................................... 203
8.4.8 Analog output ................................................................................................................. 204
8.4.9 Adjusting characteristics for analog output....................................................................... 205
8.5 Controlling clockwise and counter-clockwise rotation via digital inputs ............................. 206
8.5.1 Two-wire control, ON/reverse ........................................................................................... 208
8.5.2 Two-wire control, clockwise/counterclockwise rotation 1 .................................................. 210
8.5.3 Two-wire control, clockwise/counterclockwise rotation 2 .................................................. 212
8.5.4 Three-wire control, enable/clockwise/counterclockwise rotation........................................ 214
8.5.5 Three-wire control, enable/ON/reverse.............................................................................. 216
8.6 Drive control via PROFIBUS or PROFINET ........................................................................... 217
8.6.1 Receive data and send data .............................................................................................. 217
8.6.2 Telegrams........................................................................................................................ 218
8.6.3 Parameter channel........................................................................................................... 224
8.6.4 Examples ......................................................................................................................... 232
8.6.5 Expanding or freely interconnecting telegrams ................................................................. 234
8.6.6 Device-to-device communication...................................................................................... 237
8.6.7 Acyclically reading and writing converter parameters........................................................ 237
8.7 Drive control via Modbus RTU........................................................................................... 238
8.8 Drive control via USS ........................................................................................................ 241
8.9 Drive control via Ethernet/IP ............................................................................................. 244
8.10 Jogging ........................................................................................................................... 246
8.11 Limit position control ....................................................................................................... 248
8.12 Switching over the drive control (command data set) ....................................................... 250
8.13 Motor holding brake ........................................................................................................ 252
8.14 Free function blocks......................................................................................................... 256
8.15 Selecting physical units .................................................................................................... 257
8.15.1 Motor standard ................................................................................................................ 257
8.15.2 Unit system ..................................................................................................................... 257
8.15.3 Technological unit of the technology controller ................................................................ 260
8.15.4 Setting the system of units and technology unit ............................................................... 260
8.16 Safe Torque Off (STO) safety function ............................................................................... 261
8.16.1 Where are the safety functions described? ........................................................................ 261
8.16.2 Principle of operation....................................................................................................... 261
8.16.3 EMERGENCY SWITCHING OFF and EMERGENCY STOP ........................................................ 263
8.16.4 Commissioning STO ......................................................................................................... 264
8.16.4.1 Commissioning tools........................................................................................................ 264
SINAMICS G120C Converters
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Table of contents
8.16.4.2 Password ......................................................................................................................... 265
8.16.4.3 Configuring a safety function ........................................................................................... 266
8.16.4.4 Interconnecting the "STO active" signal............................................................................. 267
8.16.4.5 Signal filter for STO selection ............................................................................................ 268
8.16.4.6 Setting the signal filter for STO selection........................................................................... 270
8.16.4.7 Forced checking procedure .............................................................................................. 270
8.16.4.8 Setting forced checking procedure ................................................................................... 271
8.16.4.9 Complete commissioning ................................................................................................. 273
8.16.4.10 Checking the assignment of the digital inputs .................................................................. 274
8.16.4.11 Acceptance test ............................................................................................................... 276
8.17 Setpoints ......................................................................................................................... 277
8.17.1 Overview ......................................................................................................................... 277
8.17.2 Analog input as setpoint source ....................................................................................... 279
8.17.3 Specifying the setpoint via the fieldbus............................................................................. 280
8.17.4 Motorized potentiometer as setpoint source ..................................................................... 281
8.17.5 Fixed speed setpoint as setpoint source ............................................................................ 283
8.18 Setpoint processing.......................................................................................................... 286
8.18.1 Overview ......................................................................................................................... 286
8.18.2 Invert setpoint ................................................................................................................. 288
8.18.3 Inhibit direction of rotation .............................................................................................. 289
8.18.4 Skip frequency bands and minimum speed....................................................................... 290
8.18.5 Speed limitation .............................................................................................................. 292
8.18.6 Ramp-function generator ................................................................................................. 293
8.19 PID technology controller ................................................................................................. 296
8.19.1 Autotuning the PID technology controller ......................................................................... 303
8.20 Motor control................................................................................................................... 306
8.20.1 Reactor, filter and cable resistance at the converter output................................................ 306
8.20.2 U/f control ....................................................................................................................... 307
8.20.2.1 U/f control ....................................................................................................................... 307
8.20.2.2 Optimizing motor starting................................................................................................ 311
8.20.2.3 U/f control with Standard Drive Control ............................................................................ 312
8.20.2.4 Optimizing motor starting using Standard Drive Control ................................................... 315
8.20.3 Sensorless vector control.................................................................................................. 317
8.20.3.1 Structure of vector control without encoder (sensorless)................................................... 317
8.20.3.2 Optimizing the speed controller ....................................................................................... 319
8.20.3.3 Advanced settings............................................................................................................ 321
8.20.3.4 Friction characteristic ....................................................................................................... 323
8.20.3.5 Moment of inertia estimator ............................................................................................ 326
8.20.4 Application examples for closed-loop motor control.......................................................... 331
8.21 Electrically braking the motor........................................................................................... 331
8.21.1 Electrical braking ............................................................................................................. 331
8.21.2 DC braking....................................................................................................................... 333
8.21.3 Compound braking .......................................................................................................... 338
8.21.4 Dynamic braking.............................................................................................................. 339
8.22 Overcurrent protection..................................................................................................... 343
8.23 Converter protection using temperature monitoring ......................................................... 344
8.24 Motor protection with temperature sensor ....................................................................... 347
8.25 Motor protection by calculating the temperature .............................................................. 349
SINAMICS G120C Converters
Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM 9
Table of contents
8.26 How do I achieve a motor overload protection in accordance with IEC/UL 61800-5-1?........ 350
8.27 Motor and converter protection by limiting the voltage..................................................... 351
8.28 Flying restart – switching on while the motor is running................................................... 353
8.29 Automatic restart............................................................................................................. 355
8.30 Kinetic buffering (Vdc min control) ................................................................................... 357
8.31 Efficiency optimization ..................................................................................................... 359
8.32 Line contactor control ...................................................................................................... 362
8.33 Calculating the energy saving for fluid flow machines....................................................... 364
8.34 Switchover between different settings .............................................................................. 366
9 Alarms, faults and system messages ................................................................................................. 369
9.1 Operating states indicated via LEDs .................................................................................. 369
9.2 Identification & maintenance data (I&M) .......................................................................... 373
9.3 Alarms, alarm buffer, and alarm history ............................................................................ 374
9.4 Faults, alarm buffer and alarm history............................................................................... 377
9.5 List of alarms and faults ................................................................................................... 380
10 Corrective maintenance .................................................................................................................... 387
10.1 Replacing the converter hardware .................................................................................... 388
10.2 Downloading the converter settings ................................................................................. 390
10.2.1 Converter without enabled safety functions ..................................................................... 390
10.2.1.1 Automatic download from the memory card .................................................................... 390
10.2.1.2 Manual downloading from the memory card with the BOP-2 ............................................ 391
10.2.1.3 Manual download from the memory card using Startdrive ................................................ 392
10.2.1.4 Download from BOP-2 operator panel .............................................................................. 393
10.2.1.5 Download from IOP-2 operator panel ............................................................................... 394
10.2.1.6 Download from Smart Access........................................................................................... 396
10.2.1.7 Download from the PC using Startdrive ............................................................................ 397
10.2.2 Converter with enabled safety functions........................................................................... 398
10.2.2.1 Automatic download from the memory card .................................................................... 398
10.2.2.2 Manual downloading from the memory card with the BOP-2 ............................................ 399
10.2.2.3 Download from BOP-2 operator panel .............................................................................. 401
10.2.2.4 Download from IOP-2 operator panel ............................................................................... 403
10.2.2.5 Download from Smart Access........................................................................................... 405
10.2.2.6 Download from the PC using Startdrive ............................................................................ 408
10.2.3 Download with active know-how protection with copy protection..................................... 409
10.3 PROFINET device name .................................................................................................... 411
10.4 Spare parts ...................................................................................................................... 412
10.4.1 Overview ......................................................................................................................... 412
10.4.2 Replace the fan unit for the heat sink ............................................................................... 414
10.4.3 Replacing the fan for FSD ... FSF - G120C.......................................................................... 415
10.4.4 Replacing the roof-mounted fan....................................................................................... 417
10.5 Firmware upgrade and downgrade................................................................................... 419
10.5.1 Overview ......................................................................................................................... 419
SINAMICS G120C Converters
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Table of contents
10.5.2 Preparing the memory card.............................................................................................. 420
10.5.3 Upgrading the firmware ................................................................................................... 421
10.5.4 Firmware downgrade....................................................................................................... 423
10.5.5 Correcting an unsuccessful firmware upgrade or downgrade ............................................ 425
10.6 Reduced acceptance after component replacement and firmware change ......................... 426
10.7 If the converter no longer responds.................................................................................. 427
11 Technical data.................................................................................................................................... 429
11.1 Technical data of inputs and outputs ................................................................................ 429
11.2 High Overload and Low Overload ..................................................................................... 430
11.3 Overload capability of the converter ................................................................................. 431
11.4 General converter technical data ...................................................................................... 432
11.5 Technical data dependent on the power ........................................................................... 433
11.6 Data regarding the power loss in partial load operation .................................................... 439
11.7 Current reduction depending on pulse frequency ............................................................. 440
11.8 Restrictions for special ambient conditions ....................................................................... 440
11.9 System properties of the Safety Integrated functions ........................................................ 443
11.10 Electromagnetic compatibility of the converter................................................................. 444
11.10.1 Harmonic currents ........................................................................................................... 447
11.10.2 EMC limit values in South Korea ....................................................................................... 447
11.11 Protecting persons from electromagnetic fields................................................................. 447
11.12 Accessories ...................................................................................................................... 448
11.12.1 Line reactor ..................................................................................................................... 448
11.12.2 Line filter ......................................................................................................................... 450
11.12.3 Output reactor ................................................................................................................. 451
11.12.4 Sine-wave filter ................................................................................................................ 452
11.12.5 dU/dt filter plus Voltage Peak Limiter ................................................................................ 453
11.12.6 Braking resistor ................................................................................................................ 454
A Appendix............................................................................................................................................ 457
A.1 New and extended functions............................................................................................ 457
A.1.1 Firmware version 4.7 SP14 ............................................................................................... 457
A.1.2 Firmware version 4.7 SP13 ............................................................................................... 457
A.1.3 Firmware version 4.7 SP10 ............................................................................................... 459
A.1.4 Firmware version 4.7 SP9 ................................................................................................. 461
A.1.5 Firmware version 4.7 SP6 ................................................................................................. 463
A.1.6 Firmware version 4.7 SP3 ................................................................................................. 464
A.1.7 Firmware version 4.7 ....................................................................................................... 466
A.1.8 Firmware version 4.6 SP6 ................................................................................................. 467
A.1.9 Firmware version 4.6 ....................................................................................................... 468
A.1.10 Firmware version 4.5 ....................................................................................................... 469
A.2 Interconnecting signals in the converter ........................................................................... 469
A.2.1 Fundamentals.................................................................................................................. 469
A.2.2 Application example ........................................................................................................ 471
A.3 Manuals and technical support......................................................................................... 473
SINAMICS G120C Converters
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Table of contents
A.3.1 Overview of the manuals ................................................................................................. 473
A.3.2 Configuring support ......................................................................................................... 475
A.3.3 Product Support............................................................................................................... 476
SINAMICS G120C Converters
12 Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM
Fundamental safety instructions 1
1.1 General safety instructions
WARNING
Electric shock and danger to life due to other energy sources
Touching live components can result in death or severe injury.
• Only work on electrical devices when you are qualified for this job.
• Always observe the country-specific safety rules.
Generally, the following steps apply when establishing safety:
1. Prepare for disconnection. Notify all those who will be affected by the procedure.
2. Isolate the drive system from the power supply and take measures to prevent it being
switched back on again.
3. Wait until the discharge time specified on the warning labels has elapsed.
4. Check that there is no voltage between any of the power connections, and between any of
the power connections and the protective conductor connection.
5. Check whether the existing auxiliary supply circuits are de-energized.
6. Ensure that the motors cannot move.
7. Identify all other dangerous energy sources, e.g. compressed air, hydraulic systems, or
water. Switch the energy sources to a safe state.
8. Check that the correct drive system is completely locked.
After you have completed the work, restore the operational readiness in the inverse sequence.
WARNING
Risk of electric shock and fire from supply networks with an excessively high impedance
Excessively low short-circuit currents can lead to the protective devices not tripping or tripping
too late, and thus causing electric shock or a fire.
• In the case of a conductor-conductor or conductor-ground short-circuit, ensure that the
short-circuit current at the point where the converter is connected to the line supply at least
meets the minimum requirements for the response of the protective device used.
• You must use an additional residual-current device (RCD) if a conductor-ground short circuit
does not reach the short-circuit current required for the protective device to respond. The
required short-circuit current can be too low, especially for TT supply systems.
SINAMICS G120C Converters
Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM 13
Fundamental safety instructions
1.1 General safety instructions
WARNING
Risk of electric shock and fire from supply networks with an excessively low impedance
Excessively high short-circuit currents can lead to the protective devices not being able to
interrupt these short-circuit currents and being destroyed, and thus causing electric shock or a
fire.
• Ensure that the prospective short-circuit current at the line terminal of the converter does
not exceed the breaking capacity (SCCR or Icc) of the protective device used.
WARNING
Electric shock in the absence of grounding
For products with protection class I, a faulty protective conductor connection means that the
product is not grounded in conformance with the applicable regulations. In the absence of
grounding, high voltages may be present in open, exposed parts, which can result in serious
injury or death if touched.
• Ground the product in conformance with the applicable regulations.
WARNING
Electric shock due to connection to an unsuitable power supply
When equipment is connected to an unsuitable power supply, exposed components may carry
a hazardous voltage. Contact with hazardous voltage can result in severe injury or death.
• Only use power supplies that provide SELV (Safety Extra Low Voltage) or PELV- (Protective
Extra Low Voltage) output voltages for all connections and terminals of the electronics
modules.
WARNING
Electric shock from a damaged product
Improper handling can damage the product. If a product is damaged, hazardous voltages may
be present on the housing or exposed components, which can result in serious injury or death
if touched.
• Ensure compliance with the limit values specified in the technical data during transport,
storage and operation.
• Never use a damaged product.
SINAMICS G120C Converters
14 Operating Instructions, 02/2026, FW V4.7 SP14, A5E34263257B AM
Fundamental safety instructions
1.1 General safety instructions
WARNING
Electric shock due to unconnected cable shield
Hazardous touch voltages can occur through capacitive cross-coupling due to unconnected
cable shields.
• As a minimum, connect cable shields and the conductors of power cables that are not used
(e.g. brake cores) at one end at the grounded housing potential.
WARNING
Arcing when a plug connection is opened during operation
Opening a plug connection when a system is in operation can result in arcing that may cause
serious injury or death.
• Only open plug connections when the equipment is in a voltage-free state, unless it has
been explicitly stated that they can be opened in operation.
WARNING
Electric shock due to residual charges in power components
Because of the capacitors, a hazardous voltage is present for up to 5 minutes after the power
supply has been switched off. Contact with live parts can result in death or serious injury.
• Wait for 5 minutes before you Показано початок документа. Повний текст — у PDF за посиланням вище.
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