Beckhoff SCT Series Manual del operador
Documentation
SCTxxxx
Current transformers (CT) for energy measurement
1.1
2020-04-16
Version:
Date:
Table of contents
SCTxxxx 3Version: 1.1
Table of contents
1 Foreword ....................................................................................................................................................5
1.1 Notes on the documentation..............................................................................................................5
1.2 Safety instructions .............................................................................................................................6
1.3 Documentation issue status ..............................................................................................................8
2 Product overview.......................................................................................................................................9
2.1 Introduction........................................................................................................................................9
2.2 Product categories – SCTxxxx current transformer.........................................................................10
2.3 Notes on class accuracy SCT transformers ....................................................................................17
3 Technical data, functional description, installation .............................................................................18
3.1 SCT0xxx ..........................................................................................................................................18
3.1.1 Technical data ................................................................................................................. 18
3.1.2 Functional description...................................................................................................... 20
3.1.3 Installation........................................................................................................................ 21
3.2 SCT1xxx ..........................................................................................................................................24
3.2.1 Technical data ................................................................................................................. 24
3.2.2 Functional description...................................................................................................... 26
3.2.3 Installation........................................................................................................................ 27
3.3 SCT2xxx ..........................................................................................................................................29
3.3.1 Technical data ................................................................................................................. 29
3.3.2 Functional description...................................................................................................... 34
3.3.3 Installation........................................................................................................................ 35
3.4 SCT3xxx ..........................................................................................................................................40
3.4.1 Technical data ................................................................................................................. 40
3.4.2 Functional description...................................................................................................... 45
3.4.3 Installation........................................................................................................................ 47
3.5 SCT6xxx ..........................................................................................................................................52
3.5.1 Technical data ................................................................................................................. 52
3.5.2 Functional description...................................................................................................... 57
3.5.3 Installation........................................................................................................................ 59
3.5.4 Maintenance and inspection ............................................................................................ 62
3.5.5 Troubleshooting ............................................................................................................... 63
3.6 SCT7xxx ..........................................................................................................................................64
3.6.1 Technical data ................................................................................................................. 64
3.6.2 Functional description...................................................................................................... 69
3.6.3 Installation........................................................................................................................ 70
3.6.4 Maintenance and inspection ............................................................................................ 73
3.6.5 Troubleshooting ............................................................................................................... 74
4 Application example................................................................................................................................75
4.1 Power measurement at a machine..................................................................................................75
5 Appendix ..................................................................................................................................................77
5.1 UL notes ..........................................................................................................................................77
5.2 Support and Service ........................................................................................................................78
Table of contents
SCTxxxx4 Version: 1.1
Foreword
SCTxxxx 5Version: 1.1
1 Foreword
1.1 Notes on the documentation
Copyright
© Beckhoff Automation GmbH & Co. KG, Germany.
The reproduction, distribution and utilization of this document as well as the communication of its contents to
others without express authorization are prohibited.
Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a
patent, utility model or design.
Disclaimer
The documentation has been prepared with care. The products described are, however, constantly under
development.
We reserve the right to revise and change the documentation at any time and without prior announcement.
No claims for the modification of products that have already been supplied may be made on the basis of the
data, diagrams and descriptions in this documentation.
EtherCAT® is registered trademark and patented technology, licensed by Beckhoff Automation GmbH,
Germany.
Trademarks
Beckhoff®, TwinCAT®, EtherCAT®, EtherCATG®, EtherCATG10®, EtherCATP®, SafetyoverEtherCAT®,
TwinSAFE®, XFC®, XTS® and XPlanar® are registered trademarks of and licensed by Beckhoff Automation
GmbH. Other designations used in this publication may be trademarks whose use by third parties for their
own purposes could violate the rights of the owners.
Patent Pending
The EtherCAT Technology is covered, including but not limited to the following patent applications and
patents: EP1590927, EP1789857, EP1456722, EP2137893, DE102015105702 with corresponding
applications or registrations in various other countries.
Intended audience
This description is only intended for the use of trained specialists in control and automation engineering who
are familiar with the applicable national standards.
It is essential that the documentation and the following notes and explanations are followed when installing
and commissioning these components.
It is the duty of the technical personnel to use the documentation published at the respective time of each
installation and commissioning.
The responsible staff must ensure that the application or use of the products described satisfy all the
requirements for safety, including all the relevant laws, regulations, guidelines and standards.
Foreword
SCTxxxx6 Version: 1.1
1.2 Safety instructions
Description of instructions
In this documentation the following instructions are used.
These instructions must be read carefully and followed without fail!
DANGER
Serious risk of injury!
Failure to follow this safety instruction directly endangers the life and health of persons.
WARNING
Risk of injury!
Failure to follow this safety instruction endangers the life and health of persons.
CAUTION
Personal injuries!
Failure to follow this safety instruction can lead to injuries to persons.
NOTE
Damage to environment/equipment or data loss
Failure to follow this instruction can lead to environmental damage, equipment damage or data loss.
Tip or pointer
This symbol indicates information that contributes to better understanding.
Exclusion of liability
All the components are supplied in particular hardware and software configurations appropriate for the
application. Modifications to hardware or software configurations other than those described in the
documentation are not permitted, and nullify the liability of Beckhoff Automation GmbH & Co. KG.
Personnel qualification
This description is only intended for trained specialists in control, automation and drive engineering who are
familiar with the applicable national standards.
Intended use
If the equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired
Safety regulations
Please note the following safety instructions and explanations!
Product-specific safety instructions can be found on following pages or in the areas mounting, wiring,
commissioning etc.
Current transformer safety instructions
The following points must be noted:
• The applicable laws, standards and regulations.
• The state of the art at the time of installation.
• The technical rules.
Foreword
SCTxxxx 7Version: 1.1
• The operating instructions.
• The fact that operating instructions can only list general regulations and that these regulations must be
followed.
• Check the device carefully for transport damage prior to commissioning. The device must not be put
into operation if it is mechanically damaged.
• The devices described are intended for installation by qualified electricians and may only be installed in
electrical plant rooms or in closed housings. Any other use or the disregard of these application notes
will result in the loss of the warranty/guarantee.
• The devices may only be installed in dry indoor rooms.
• Do not mount on highly flammable materials.
• Operation with a higher current than the rated current specified on the name plate can lead to
overheating of the current transformer and thus to burns.
Foreword
SCTxxxx8 Version: 1.1
1.3 Documentation issue status
Version Comment
1.1 - Update chapter ”Notes on class accuracy SCT transformers”
- Update structure
1.0 - 1st public issue
- Addenda & corrections
0.1 – 0.4 - Provisional documentations for SCTxxxx
Product overview
SCTxxxx 9Version: 1.1
2 Product overview
2.1 Introduction
SCTxxxx | Current transformers (CT) for energy measurement
Fig.1: SCT current transformers
With its SCT current transformers, Beckhoff makes it possible to implement reliable power sensor technology
in the field, which is directly integrated into the PC-based control system. Users can select from two device
concepts, each with various designs and performance categories that are highly scalable and therefore
suitable for any application. The SCT portfolio is extremely broad-based, ranging from low-cost 3-phase CT
sets for building technology to standard industrial transformers for machines through to solutions for
inspection and test stands with extra-high accuracy requirements.
The choice of the suitable product category [}10] depends on the type of use. While ring-type CTs are
predestined for cost-effective and accurate data acquisition in new installations, split-core CTs provide the
ideal solution for retrofit solutions due to their easy installation.
Product overview
SCTxxxx10 Version: 1.1
2.2 Product categories – SCTxxxx current transformer
Breakdown of the type designation of the SCT current transformer
Fig.2: Designation key of the SCT current transformers
Coil current transformers
Fig.3: SCT0xxx
In order to guarantee the power transmission, current transformers need a correspondingly large measuring
core volume with decreasing primary rated currents. The dimensions of standard current transformers would
quickly hit their limits on the basis of this physical principle. The SCT0xxx coil current transformers with
electrical isolation are specially designed for these low primary rated currents and are used in corresponding
applications.
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