Related Manuals for Beckhoff SCT7 Series
Summary of Contents for Beckhoff SCT7 Series
- Page 1 Documentation | EN SCT7xxx Busbar split-core current transformers 2021-04-12 | Version: 1.2...
-
Page 3: Table Of Contents
Table of contents Table of contents 1 Foreword .............................. 5 Notes on the documentation...................... 5 Safety instructions .......................... 6 2 Product overview............................ 8 Introduction ............................ 8 Basics current transformers....................... 9 Product categories – SCTxxxx current transformer................. 12 Notes on class accuracy SCT transformers .................. 20 3 Technical data............................ 21 SCT71xx | Busbar split-core current transformers, size 1 ............... 21 3.1.1 SCT71xx | General ...................... - Page 4 Table of contents Version: 1.2 SCT7xxx...
-
Page 5: Foreword
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 ®... -
Page 6: Safety Instructions
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. - Page 7 Foreword • 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.
-
Page 8: Product Overview
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. -
Page 9: Basics Current Transformers
Product overview Basics current transformers Function and design A current transformer is a transforming device that transforms an input current into a processable current signal at the output. A current transformer is mainly used to transform currents of large magnitudes to directly measurable, smaller values in the milliampere or small ampere range. - Page 10 Product overview WARNING Dangerous voltages with secondary side not connected The secondary winding must be connected to a current measuring device or short-circuited, otherwise high core losses or dangerous voltages may occur on the secondary side. Before replacing the measuring elec- tronics in the secondary circuit, the current transformer must therefore be short-circuited at its secondary terminals.
- Page 11 Product overview Technical terms of current transformers Term Explanation Primary rated current I Value of the rated current on the primary side. (alternative formula symbol I Secondary rated current I Value of the rated current on the secondary side. Rated power S Value of apparent power (in [VA]) that the transformer can deliver to the secondary circuit at secondary rated current and rated load.
-
Page 12: Product Categories - Sctxxxx Current Transformer
Product overview Product categories – SCTxxxx current transformer Breakdown of the type designation of the SCT current transformer Fig. 4: Designation key of the SCT current transformers Version: 1.2 SCT7xxx... - Page 13 Product overview Coil current transformers Fig. 5: 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.
- Page 14 Product overview Mini ring-type current transformer Fig. 6: SCT1xxx The SCT1111 mini ring-type current transformer can be positioned on a DIN rail by means of snap-on fastening and is thus suitable for measurements in very tight installation spaces, e.g. directly in the sub- distribution unit.
- Page 15 Product overview Ring-type current transformer Fig. 7: SCT2xxx The SCT2xxx series offers a large selection of ring-type current transformers for primary currents from 60 to 2500 A in six sizes and two accuracy classes. The innovative screwless connection technology for rigid and flexible conductors saves time –...
- Page 16 Product overview Ring-type current transformer SCT2111 Accuracy class 1, primary current 0…60 A AC to 0…500 A AC, secondary current 1 A AC, max. diameter round conductor 25.7 mm (size 1) SCT2121 Accuracy class 0.5, primary current 0…125 A AC to 0…600 A AC, secondary current 1 A AC, max.
- Page 17 Product overview 3-phase ring-type current transformers Fig. 8: SCT3xxx The compact SCT3xxx 3-phase ring-type current transformers for direct mounting under commonly used power switches measure primary currents from 3 x 50 to 3 x 600 A, with secondary currents of 1 or 5 A. The whole of the SCT3xxx series is available in accuracy class 1 and is supplemented by the SCT3121-0125 and SCT3121-0150 current transformers in accuracy class 0.5.
- Page 18 Product overview Split-core current transformers Fig. 9: SCT6xxx The separable measuring system of the SCT6xxx split-core current transformers enables flexible retrofitting without disconnecting the primary conductor. Due to the minimal installation effort, they are suitable for use in places that are difficult to access or where space is limited. Four sizes are available. Accuracy class 3 is suitable for primary currents from 60 to 150 A, accuracy class 1 for 200 to 1000 A.
- Page 19 Product overview Busbar split-core current transformers Fig. 10: SCT71xx Like the SCT6xxx series, the SCT7xxx busbar split-core current transformers for primary currents up to 5000 A can be retrofitted to existing systems with no great mounting effort. From 500 A, there is a choice between accuracy class 0.5 and 1 for each primary current.
-
Page 20: Notes On Class Accuracy Sct Transformers
Product overview Notes on class accuracy SCT transformers Current transformers are divided into classes according to their accuracy. The Beckhoff SCT current transformers are available in the standard accuracy classes 0.5; 1 and 3, depending on the product category. The class designation corresponds to an error curve with regard to current amplitude and angular error. -
Page 21: Technical Data
Technical data Technical data SCT71xx | Busbar split-core current transformers, size 1 3.1.1 SCT71xx | General Primary side SCT71xx-xxxx Thermal rated continuous current I 1,0 * I Rated short-time thermal current I 60 * I /1 s (max. 100 kA) Rated impulse current I 2,5 * I Rated frequency f... - Page 22 Technical data SCT71xx dimensions, size 1 Fig. 12: Isometric view, top view; all dimensions in mm Fig. 13: Right side view, front view, left side view; all dimensions in mm Version: 1.2 SCT7xxx...
-
Page 23: Sct7105 | Busbar Split-Core Current Transformer For Primary Currents 0
Technical data 3.1.2 SCT7105 | Busbar split-core current transformer for primary currents 0…100 A/0…200 A, accuracy class 3, size 1 Technical data SCT7105-xxxx Accuracy class Primary current 0…100 A AC / 0…200 A AC Secondary current 5 A AC Versions SCT7105-0100 ratio 100/5, rated power 1.25 VA SCT7105-0200... -
Page 24: Sct7115 | Busbar Split-Core Current Transformer For Primary Current 0
Technical data 3.1.3 SCT7115 | Busbar split-core current transformer for primary current 0...250 V / 0…400 A, accuracy class 1, size 1 Technical data SCT7115-xxxx Accuracy class Primary current 0…200 A AC / 0…400 A AC Secondary current 5 A AC Versions SCT7115-0250 ratio 250/5,... -
Page 25: Sct7125 | Busbar Split-Core Current Transformer For Primary Current 0
Technical data 3.1.4 SCT7125 | Busbar split-core current transformer for primary current 0…400 A, accuracy class 0.5, size 1 Technical data SCT7125-xxxx Accuracy class Primary current 0…400 A AC Secondary current 5 A AC Versions SCT7125-0400 ratio 400/5, rated power 1.0 VA SCT7xxx Version: 1.2... -
Page 26: Sct72Xx | Busbar Split-Core Current Transformers, Size 2
Technical data SCT72xx | Busbar split-core current transformers, size 2 3.2.1 SCT72xx | General Primary side SCT72xx-xxxx Thermal rated continuous current I 1,0 * I Rated short-time thermal current I 60 * I /1 s (max. 100 kA) Rated impulse current I 2,5 * I Rated frequency f 50..60 Hz... - Page 27 Technical data SCT72xx dimensions, size 2 Fig. 14: Isometric view, top view; all dimensions in mm Fig. 15: Right side view, front view, left side view; all dimensions in mm SCT7xxx Version: 1.2...
-
Page 28: Sct7215 | Busbar Split-Core Current Transformer For Primary Currents 0
Technical data 3.2.2 SCT7215 | Busbar split-core current transformer for primary currents 0…500/0…600 A, accuracy class 1, size 2 Technical data SCT7215-xxxx Accuracy class Primary current 0…500 A AC / 0…600 A AC Secondary current 5 A AC Versions SCT7215-0500 ratio 500/5, rated power 5.0 VA SCT7215-0600 ratio 600/5,... -
Page 29: Sct7225 | Busbar Split-Core Current Transformer For Primary Currents 0.5,
Technical data 3.2.3 SCT7225 | Busbar split-core current transformer for primary currents 0…500/0…600 A, accuracy class 0.5, size 2 Technical data SCT7225-xxxx Accuracy class Primary current 0…500 A AC / 0…600 A AC Secondary current 5 A AC Versions SCT7225-0500 ratio 500/5, rated power 2.5 VA SCT7225-0600 ratio 600/5,... -
Page 30: Sct73Xx | Busbar Split-Core Current Transformers, Size 3
Technical data SCT73xx | Busbar split-core current transformers, size 3 3.3.1 SCT73xx | General Primary side SCT73xx-xxxx Thermal rated continuous current I 1,0 * I Rated short-time thermal current I 60 * I /1 s (max. 100 kA) Rated impulse current I 2,5 * I Rated frequency f 50..60 Hz... - Page 31 Technical data SCT73xx dimensions, size 3 Fig. 16: Isometric view, top view; all dimensions in mm Fig. 17: Right side view, front view, left side view; all dimensions in mm SCT7xxx Version: 1.2...
-
Page 32: Sct7315 | Busbar Split-Core Current Transformer For Primary Currents 0
Technical data 3.3.2 SCT7315 | Busbar split-core current transformer for primary currents 0…750 to 0...1500 A, accuracy class 1, size 3 Technical data SCT7315-xxxx Accuracy class Primary current 0…750 A AC to 0…1500 A AC Secondary current 5 A AC Versions SCT7315-0750 ratio 750/5, rated power 5 VA... -
Page 33: Sct7325 | Busbar Split-Core Current Transformer For Primary Currents 0.5,
Technical data 3.3.3 SCT7325 | Busbar split-core current transformer for primary currents 0…750 to 0...1500 A, accuracy class 0.5, size 3 Technical data SCT7325-xxxx Accuracy class Primary current 0…750 A AC to 0…1500 A AC Secondary current 5 A AC Versions SCT7325-0750 ratio 750/5, rated power 2.5 VA... -
Page 34: Sct74Xx | Busbar Split-Core Current Transformers, Size 4
Technical data SCT74xx | Busbar split-core current transformers, size 4 3.4.1 SCT74xx | General Primary side SCT74xx-xxxx Thermal rated continuous current I 1,0 * I Rated short-time thermal current I 60 * I /1 s (max. 100 kA) Rated impulse current I 2,5 * I Rated frequency f 50..60 Hz... - Page 35 Technical data SCT74xx dimensions, size 4 Fig. 18: Isometric view, top view; all dimensions in mm Fig. 19: Right side view, front view, left side view; all dimensions in mm SCT7xxx Version: 1.2...
-
Page 36: Sct7415 | Busbar Split-Core Current Transformer For Primary Currents 0
Technical data 3.4.2 SCT7415 | Busbar split-core current transformer for primary currents 0…1500 to 0…5000 A, accuracy class 1, size 4 Technical data SCT7415-xxxx Accuracy class Primary current 0…1500 A AC to 0…5000 A AC Secondary current 5 A AC Versions SCT7415-1500 ratio 1500/5, rated power 15 VA... -
Page 37: Sct7425 | Busbar Split-Core Current Transformer For Primary Currents 0.5,
Technical data 3.4.3 SCT7425 | Busbar split-core current transformer for primary currents 0...1500 to 0...5000 A, accuracy class 0.5, size 4 Technical data SCT7425-xxxx Accuracy class Primary current 0…1500 A AC to 0…5000 A AC Secondary current 5 A AC Versions SCT7425-1500 ratio 1500/5, rated power 15 VA... -
Page 38: Commissioning
Commissioning Commissioning Installation DANGER Open transformer circuits lead to electric shock and arc flashover! Disregarding this will result in death, physical injury or considerable damage to property! • Never open the secondary circuit of the current transformer under load. • Short-circuit the secondary current terminals of the current transformer before removing the device. WARNING Hazardous voltage can lead to electric shock and burns! •... - Page 39 Commissioning Measuring circuit Fig. 20: Measuring circuit - SCT7xxx transformer Assembly notes Fig. 21: Buttons to open the SCT7xxx SCT7xxx Version: 1.2...
- Page 40 Commissioning Fig. 22: Knurled screw of the SCT74xx Version: 1.2 SCT7xxx...
-
Page 41: Maintenance And Inspection
Commissioning Maintenance and inspection Maintenance and inspection • Check whether the secondary conductors are firmly connected to the current transformer and to the measuring device. • Open circuit: Current transformers must be short-circuited as long as no tapping occurs! Note the danger warnings [} 38] in the chapter "Installation [} 38]"! •... -
Page 42: Troubleshooting
Commissioning Troubleshooting Troubleshooting In the case of errors, e.g. unexpected or incorrect values, inverse power: • Check the settings of the measuring device on the basis of its operating instructions. • Check whether the current transformer is mounted on the intended conductor in the direction of the energy flow. -
Page 43: Application Example
EL3443 • The voltage is measured via connections L1, L2, L3 and N. • The current is measured via three current transformers (e.g. from the Beckhoff SCT series) and the connections I and I (star point of the current transformers). - Page 44 Application example • The current is measured via 4 current transformers (e.g. from the Beckhoff SCT series) and the connections I and I (star point of the current transformers). Fig. 24: EL3453, power measurement at a machine Negative power values If negative power values are measured on a circuit, please check whether the associated current transformer circuit is connected correctly.
-
Page 45: Appendix
Appendix Appendix Documentation issue status Version Comment - Addenda chapter ”Notes on class accuracy SCT transformers” - Addenda & corrections public issue - Addenda & corrections SCT7xxx Version: 1.2... -
Page 46: Support And Service
Please contact your Beckhoff branch office or representative for local support and service on Beckhoff products! The addresses of Beckhoff's branch offices and representatives round the world can be found on her internet pages: https://www.beckhoff.com You will also find further documentation for Beckhoff components there. - Page 48 More Information: www.beckhoff.com/SCT7xxx Beckhoff Automation GmbH & Co. KG Hülshorstweg 20 33415 Verl Germany Phone: +49 5246 9630 info@beckhoff.com www.beckhoff.com...