Siemens SINAMICS MV Parts list manual

Function Manual
Edition
Medium voltage converters
Two-channel firing pulse inhibit
SINAMICS MV
www.siemens.com
07/2021

SINAMICS
Two-channel 󹪝ring pulse inhibit
Function Manual
07/2021
A5E51227986A
Introduction 1
Safety instructions 2
Description 3
Preparing for use 4
Operation 5
Wiring A

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.
Quali󹪝ed Personnel
The product/system described in this documentation may be operated only by personnel quali󹪝ed for the speci󹪝c
task in accordance with the relevant documentation, in particular its warning notices and safety instructions.
Quali󹪝ed personnel are those who, based on their training and experience, are capable of identifying risks and
avoiding potential hazards when working with these products/systems.
Proper use of Siemens products
Note the following:
WARNING
Siemens products may only be used for the applications described in the catalog and in the relevant technical
documentation. 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 identi󹪝ed by ® are registered trademarks of Siemens AG. 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 AG
Large Drives Applications
Vogelweiherstr. 1-15
90441 NÜRNBERG
GERMANY
Document order number: A5E51227986A
Ⓟ 08/2021 Subject to change
Copyright © Siemens AG 2021.
All rights reserved

Table of contents
1 Introduction ........................................................................................................................................... 5
1.1 About these instructions ...................................................................................................... 5
2 Safety instructions................................................................................................................................. 7
3 Description............................................................................................................................................. 9
3.1 Structure ............................................................................................................................. 9
3.2 Function features............................................................................................................... 11
3.3 Functions........................................................................................................................... 12
3.3.1 Switching sequences from the perspective of the system operator...................................... 12
3.3.1.1 Activating and deactivating the 󹪝ring pulse inhibit.............................................................. 13
3.3.1.2 Deactivating the 󹪝ring pulse inhibit and restarting.............................................................. 14
4 Preparing for use ................................................................................................................................. 15
4.1 Wiring for cable lengths exceeding 30 m ............................................................................ 15
5 Operation............................................................................................................................................. 17
A Wiring .................................................................................................................................................. 19
A.1 Wiring overview................................................................................................................. 19
A.2 Checking the wiring when the function is retro󹪝tted........................................................... 20
A.2.1 Wiring to the tripping device .............................................................................................. 20
A.2.2 Wiring to the PSAs in the power unit .................................................................................. 21
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 3

Table of contents
Two-channel 󹪝ring pulse inhibit
4Function Manual, 07/2021, A5E51227986A

Introduction 1
• The function is NOT a Safe Torque O󹪜 (STO) function.
• A risk analysis is not available.
• STO functionality can only be implemented on the system side in conjunction with additional
measures, and must be certi󹪝ed by a third party.
• At the time of activation, the system must be at a complete standstill.
1.1 About these instructions
• This documentation describes the two-channel 󹪝ring pulse inhibit (a 2-channel light on/light
o󹪜 function of the light emitting control).
• This documentation addresses the following persons:
– System integrators
– Commissioning engineers
– Service personnel of the SINAMICS medium voltage converter
Text format features
You can 󹪝nd the following text format features in these instructions:
1. Handling instructions are always formatted as a numbered list. Always perform the steps in
the order given.
• Lists are formatted as bulleted lists.
– Lists on the second level are hyphenated.
Note
The note provides you with additional information about the product itself, handling the product
- and the relevant documentation.
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 5

Introduction
1.1 About these instructions
Two-channel 󹪝ring pulse inhibit
6Function Manual, 07/2021, A5E51227986A

Safety instructions 2
Risk of death resulting from failure to observe the safety instructions and residual risks
If you fail to heed and comply with the safety instructions and residual risks in the associated
converter documentation, accidents can occur. This can result in severe injury or death.
• Observe the safety instructions in the converter documentation.
• Consider the residual risks in the risk assessment.
Danger due to insu󹪟cient training
Any operation and service involving the "Two-channel 󹪝ring pulse inhibit" function must be
performed by trained quali󹪝ed personnel only. The drive can start unexpectedly due to improper
operation of the function. This can result in death, serious injury or material damage.
• Carefully ensure that everyone operating or servicing the "Two-channel 󹪝ring pulse inhibit"
function are adequately trained before they use the function. Training must include studying
the function and its integration into the production process. Documenting the training.
Danger due to coast down of the motor
When the "Two-channel 󹪝ring pulse inhibit" function is activated while the machine is rotating,
then the motor coasts down if it has not yet come to a stop.
Incorrect use can result in death, serious injury or substantial material damage.
• Apply the appropriate protective measures to avoid danger to people resulting from the
motor coasting down after the power supply has been disconnected.
Danger of the motor jerking into motion from standstill
When certain faults occur in the Power Module, brief jerking of the motor into motion from
standstill cannot be ruled out. The simultaneous destruction (short-circuit or breakdown of
depletion layer) of 2 power thyristors in the converter may cause the drive to move brie󹪞y
depending on the number of poles that the motor has. The precondition for this brief drive
movement is that one power thyristor in the upper branch and one power thyristor o󹪜set in the
lower branch develops a short-circuit or breaks down the depletion layer. For rotary three-phase
motors, this alignment movement can be a maximum of 180° / number of pole pairs at the motor
shaft.
An alternating 󹪝eld is generated in the motor winding as a result of the double fault described
above where 2 power thyristors remain in the conducting state. However, this does not result in
a rotating 󹪝eld and continuous rotation.
The destruction of 2 power semiconductors can only occur when several power thyristors
simultaneously break down (depletion layer is broken down) or as a result of multiple
simultaneous faults in the control modules. Although these types of double faults can only occur
Two-channel 󹪝ring pulse inhibit
Function Manual, 07/2021, A5E51227986A 7

with a very low probability, the machine builder (OEM) must carefully check as to whether
additional measures are required. Incorrect handling when the motor suddenly moves can result
in death, serious injury or substantial material damage.
• Adopt suitable protective measures to ensure that personnel is not endangered by the motor
jerking into motion from standstill.
• Carefully ensure that everyone operating the "Two-channel 󹪝ring pulse inhibit" function are
adequately trained before they use the function. Training must include studying the function
and its integration into the production process. Documenting the training.
Danger due to the motor restarting
Drive systems, in which the energy supply to the motor is also possible via the load, e.g. marine
drives, conveyors, fans, etc., cannot be protected against restart using the "Two-channel 󹪝ring
pulse inhibit" function. Sudden and unexpected restarting of the motor can result in death,
serious injury or substantial material damage.
• Take appropriate countermeasures, such as mechanical braking.
Danger by not waiting for the principle-related delay time to elapse
Selecting the "Two-channel 󹪝ring pulse inhibit" function causes the 󹪝ring pulses to be inhibited.
Due to the inherent operating principle, the 󹪝ring pulses are inhibited after a short delay time.
The recommended delay time setting at the 3SK11 safety relay is 0.5 seconds.
Death and severe injury can occur if the delay time is not strictly observed.
• After externally activating the "Two-channel 󹪝ring pulse inhibit" function, always wait until
the set delay time has elapsed.
• For the upstream safety controls, take into account this delay time when releasing protective
doors or other protective equipment.
Danger due to high voltage
The drive is not disconnected from the line supply when activating the "Two-channel 󹪝ring pulse
inhibit" function. Dangerous voltages of over 1000 V are present on the motor and drive
converter. High voltages can cause death or serious injury if the safety rules are not observed or
if the equipment is handled incorrectly.
• Isolate the electrical equipment from the line supply at the main switch when it breaks down
or stops, or when it needs to be serviced, repaired or cleaned.
• Do not carry out any work on electrical connections without 󹪝rst applying all of the necessary
protective measures. Observe the 5 safety rules before undertaking work on the equipment.
Safety instructions
Two-channel 󹪝ring pulse inhibit
8Function Manual, 07/2021, A5E51227986A