Related Manuals for Beckhoff SCT Series
Summary of Contents for Beckhoff SCT Series
- Page 1 Documentation SCTxxxx Current transformers (CT) for energy measurement Version: Date: 2020-04-16...
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Page 3: Table Of Contents
Table of contents Table of contents 1 Foreword .............................. 5 Notes on the documentation...................... 5 Safety instructions .......................... 6 Documentation issue status ...................... 8 2 Product overview............................ 9 Introduction ............................ 9 Product categories – SCTxxxx current transformer................. 10 Notes on class accuracy SCT transformers .................. 17 3 Technical data, functional description, installation ................ 18 SCT0xxx ............................ 18 3.1.1 Technical data ......................... - Page 4 Table of contents Version: 1.1 SCTxxxx...
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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.
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Page 8: Documentation Issue Status
Foreword Documentation issue status Version Comment - Update chapter ”Notes on class accuracy SCT transformers” - Update structure public issue - Addenda & corrections 0.1 – 0.4 - Provisional documentations for SCTxxxx Version: 1.1 SCTxxxx... -
Page 9: 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 10: Product Categories - Sctxxxx Current Transformer
Product overview 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. -
Page 11: Fig. 4 Sct1Xxx
Product overview Coil current transformers Accuracy class 1, SCT0111 [} 18] primary current 1…30 A, secondary current 1 A Accuracy class 0.5, SCT0121 [} 18] primary current 1…30 A, secondary current 1 A Mini ring-type current transformer Fig. 4: 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. -
Page 12: Fig. 5 Sct2Xxx
Product overview Ring-type current transformer Fig. 5: 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 13 Product overview Ring-type current transformer Accuracy class 1, SCT2111 [} 29] primary current 60…500 A, secondary current 1 A, max. diameter round conductor 25.7 mm (size 1) Accuracy class 0.5, SCT2121 [} 29] primary current 125…600 A, secondary current 1 A, max. diameter round conductor 25.7 mm (size 1) Accuracy class 1, SCT2211 [} 30] primary current 600/750 A,...
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Page 14: Fig. 6 Sct3Xxx
Product overview 3-phase ring-type current transformers Fig. 6: 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 15: Fig. 7 Sct6Xxx
Product overview Split-core current transformers Fig. 7: 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 16: Fig. 8 Sct71Xx
Product overview Busbar split-core current transformers Fig. 8: 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 17: 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 18: Technical Data, Functional Description, Installation
Technical data, functional description, installation Technical data, functional description, installation SCT0xxx 3.1.1 Technical data SCT0111 | Coil current transformers for primary currents 1…30 A, accuracy class 1 Technical data SCT0111 Accuracy class Primary current 1…30 A Secondary current Max. diameter round conductor primary conductor for connection Size 70 mm x 88.5 mm x 45 mm... - Page 19 Technical data, functional description, installation Versions SCT0121-0001 current ratio 1/1 A, rated power 2.5 VA SCT0121-0002 current ratio 2.5/1 A, rated power 2.5 VA SCT0121-0005 current ratio 5/1 A, rated power 2.5 VA SCT0121-0010 current ratio 10/1 A, rated power 2.5 VA SCT0121-0015 current ratio 15/1 A, rated power 2.5 VA SCT0121-0020 current ratio 20/1 A, rated power 2.5 VA SCT0121-0025 current ratio 25/1 A, rated power 2.5 VA...
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Page 20: Functional Description
Technical data, functional description, installation SCT0xxx dimensions, size 1 Fig. 10: SCT0xxx dimensions, size 1 3.1.2 Functional description Current transformers from this series are inductive, single-conductor current transformers that operate according to the transformer principle. They serve to adapt the primary measured variable to the input rating of the connected measuring devices. -
Page 21: Installation
Technical data, functional description, installation 3.1.3 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. •... -
Page 22: Fig. 12 Measuring Circuit - Sct0Xxx/Sct1Xxx/Sct2Xxx Transformer
Technical data, functional description, installation • After connecting the primary and secondary conductors, engage the red connection cover plates again with an audible “click”. Measuring circuit Fig. 12: Measuring circuit - SCT0xxx/SCT1xxx/SCT2xxx transformer Assembly notes • Use the fastening plates provided to fasten the device to a mounting plate. These can be fastened to the mounting plate with two screws, max. -
Page 23: Fig. 14 Sealing Plate, Zb8202-0010
Technical data, functional description, installation Fig. 14: Sealing plate, ZB8202-0010 SCTxxxx Version: 1.1... -
Page 24: Sct1Xxx
Technical data, functional description, installation SCT1xxx 3.2.1 Technical data SCT1111 | Mini ring-type current transformer for primary currents 32...64 A, accuracy class 1 Technical data SCT1111-xxxx Accuracy class Primary current 32…64 A Secondary current Max. diameter round conductor 7.6 mm Size 27.5 mm x 46.5 mm x 19 mm Dimensions [} 25] (W x H x D) -
Page 25: Fig. 15: Sct1Xxx Dimensions, Size 1
Technical data, functional description, installation SCT1xxx dimensions, size 1 Fig. 15: SCT1xxx dimensions, size 1 SCTxxxx Version: 1.1... -
Page 26: Functional Description
Technical data, functional description, installation 3.2.2 Functional description Current transformers from this series are inductive, single-conductor current transformers that operate according to the transformer principle. They serve to adapt the primary measured variable to the input rating of the connected measuring devices. Due to the measuring principle used, these current transformers are suitable only for use in AC mains systems. -
Page 27: Installation
Technical data, functional description, installation 3.2.3 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. •... -
Page 28: Fig. 17 Snap-On Mounting, Zb8201-0110
Technical data, functional description, installation NOTE Observe the conductor cross-sections and lengths! The conductor cross-sections and lengths specified below must be adhered to for trouble-free function! Conductor cross-section Power loss mm² VA/m 0.070 0.75 0.047 0.035 0.023 Assembly notes • To fasten the device to a mounting plate, use the optionally available snap-on mounting (ZB8201-0110 [} 28]) for DIN rails. -
Page 29: Sct2Xxx
Technical data, functional description, installation SCT2xxx 3.3.1 Technical data SCT2111 | Ring-type current transformer for primary currents 60...500 A, accuracy class 1 Technical data SCT2111-xxxx Accuracy class Primary current 60…500 A Secondary current Max. diameter round conductor 25.7 mm Possible bar dimensions 20 x 20 mm, 25 x 12 mm, 30 x 10 mm Size 60 mm x 81 mm x 52 mm... - Page 30 Technical data, functional description, installation Versions SCT2121-0125 current ratio 125/1 A, rated power 1.5 VA SCT2121-0150 current ratio 150/1 A, rated power 2.5 VA SCT2121-0200 current ratio 200/1 A, rated power 2.5 VA SCT2121-0250 current ratio 250/1 A, rated power 5 VA SCT2121-0300 current ratio 300/1 A, rated power 5 VA SCT2121-0400 current ratio 400/1 A, rated power 10 VA SCT2121-0500 current ratio 500/1 A, rated power 10 VA...
- Page 31 Technical data, functional description, installation SCT2311 | Ring-type current transformer for primary currents 800/1000 A, accuracy class 1 Technical data SCT2311-xxxx Accuracy class Primary current 800/1000 A Secondary current Max. diameter round conductor 43.7 mm Possible bar dimensions 40 x 30 mm, 50 x 12 mm Size 85 mm x 105 mm x 52 mm Dimensions [} 34] (W x H x D) Approvals/markings Versions...
- Page 32 Technical data, functional description, installation SCT2421 | Ring-type current transformer for primary currents 1250/1500 A, accuracy class 0.5 Technical data SCT2421-xxxx Accuracy class Primary current 1250/1500 A Secondary current Max. diameter round conductor 43.7 mm Possible bar dimensions 50 x 30 mm, 63 x 10 mm Size 95 mm x 115 mm x 52 mm Dimensions [} 34] (W x H x D) Approvals/markings Versions...
- Page 33 Technical data, functional description, installation SCT2615 | Ring-type current transformers for primary current 2500 A, accuracy class 1 Technical data SCT2615-xxxx Accuracy class Primary current 2500 A Secondary current Max. diameter round conductor 70 mm Possible bar dimensions 80 x 30 mm, 100 x 10 mm Size 130 mm x 147 mm x 52 mm Dimensions [} 34] (W x H x D) Approvals/markings Versions...
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Page 34: Functional Description
Technical data, functional description, installation SCT2xxx dimensions, sizes 1 – 6 Fig. 18: SCT2xxx dimensions Dimension SCT21xx SCT22xx SCT23xx SCT24xx SCT25xx SCT26xx (size 1) (size 2) (size 3) (size 4) (size 5) (size 6) Width in mm 60 Height in mm 80.5 91.15 105.25 114.86... -
Page 35: Installation
Technical data, functional description, installation 3.3.3 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. •... -
Page 36: Fig. 19 Measuring Circuit - Sct0Xxx/Sct1Xxx/Sct2Xxx Transformer
Technical data, functional description, installation Measuring circuit Fig. 19: Measuring circuit - SCT0xxx/SCT1xxx/SCT2xxx transformer Assembly notes Fig. 20: Actuation of the secondary connecting terminals (CAGE CLAMP®) Fig. 21: Mounting the fastening screws Version: 1.1 SCTxxxx... -
Page 37: Fig. 22 Mounting On Copper Bar Or Round Conductor
Technical data, functional description, installation Fig. 22: Mounting on copper bar or round conductor Fig. 23: Mounting with quick-fix cable fastening (ZB8203-0210, ZB8203-0211) Fig. 24: Mounting on 35 mm DIN rail with snap-on mounting (ZB8201-0210) Fig. 25: Mounting on mounting plate SCTxxxx Version: 1.1... -
Page 38: Fig. 26 Mounted Sealing Plate
Technical data, functional description, installation SCT21xx SCT22xx SCT23xx SCT24xx SCT25xx SCT26xx Dimension "A" [mm] Fig. 26: Mounted sealing plate Accessories Fig. 27: Snap-on mounting for 35 mm DIN rail, ZB8201-0210 Fig. 28: Quick-fix cable fastening, ZB8203-0210 or ZB8203-0211 (extra heat-resistant) Version: 1.1 SCTxxxx... -
Page 39: Fig. 29 Sealing Plate, Zb8202-0210
Technical data, functional description, installation Fig. 29: Sealing plate, ZB8202-0210 SCTxxxx Version: 1.1... -
Page 40: Sct3Xxx
Technical data, functional description, installation SCT3xxx 3.4.1 Technical data SCT3111 | 3-phase ring-type current transformer for primary currents 50...150 A, accuracy class 1 Technical data SCT3111-xxxx Accuracy class Primary current 3 x 50…3 x 150 A Secondary current Max. diameter round conductor 13.5 mm Size 105 mm x 90 mm x 54 mm... -
Page 41: Fig. 30 Sct31Xx Dimensions, Size
Technical data, functional description, installation SCT31xx dimensions, size 1 Fig. 30: SCT31xx dimensions, size 1 SCT3215 | 3-phase ring-type current transformer for primary currents 100...250 A, accuracy class 1 Technical data SCT3215-xxxx Accuracy class Primary current 3 x 100…3 x 250 A Secondary current Max. - Page 42 Technical data, functional description, installation Versions SCT3215-0100 current ratio 3 x 100/5 A, rated power 1.0 VA SCT3215-0150 current ratio 3 x 150/5 A, rated power 1.25 VA SCT3215-0160 current ratio 3 x 160/5 A, rated power 1.5 VA SCT3215-0200 current ratio 3 x 200/5 A, rated power 1.5 VA SCT3215-0250 current ratio 3 x 250/5 A, rated power 2.5 VA...
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Page 43: Fig. 31 Sct32Xx Dimensions, Size 2
Technical data, functional description, installation SCT32xx dimensions, size 2 Fig. 31: SCT32xx dimensions, size 2 SCTxxxx Version: 1.1... - Page 44 Technical data, functional description, installation SCT3315 | 3-phase ring-type current transformer for primary currents 250...600 A, accuracy class 1 Technical data SCT3315-xxxx Accuracy class Primary current 3 x 250…3 x 600 A Secondary current Max. diameter round conductor 22 mm Size 150 mm x 75 mm x 55 mm Dimensions [} 45] (W x H x D) Approvals/markings Versions...
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Page 45: Functional Description
Technical data, functional description, installation SCT33xx dimensions, size 3 Fig. 32: SCT33xx dimensions, size 3 3.4.2 Functional description Current transformers from the SCT3xxx series are each comprised of 3 inductive, single-conductor current transformers operating according to the transformer principle, which are combined into three-phase conductor sets. - Page 46 Technical data, functional description, installation They serve to adapt the primary measured variable to the input rating of the connected measuring devices. Due to the measuring principle used, these current transformers are suitable only for use in AC mains systems. Current transformers from the SCT3xxx series are maintenance-free.
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Page 47: Installation
Technical data, functional description, installation 3.4.3 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. •... -
Page 48: Fig. 33 Measuring Circuit - Sct3Xxx Transformer
Technical data, functional description, installation Measuring circuit Fig. 33: Measuring circuit - SCT3xxx transformer Fig. 34: SCT3xxx transformer, meter circuit, multi-phase Version: 1.1 SCTxxxx... -
Page 49: Fig. 35 Mounting The Fastening Screws Sct3215, Sct3315
Technical data, functional description, installation Assembly notes Fig. 35: Mounting the fastening screws SCT3215, SCT3315 Fig. 36: Mounting on copper bar or round conductor, SCT3215, SCT3315 Fig. 37: Tightening torque of fastening screw: 0.5 Nm SCTxxxx Version: 1.1... -
Page 50: Fig. 38 Mounting On Mounting Plate Sct3211
Technical data, functional description, installation Fig. 38: Mounting on mounting plate SCT3211 Fig. 39: Mounting on mounting plate SCT3315 Version: 1.1 SCTxxxx... -
Page 51: Fig. 40 Connection Example
Technical data, functional description, installation Fig. 40: Connection example SCTxxxx Version: 1.1... -
Page 52: Sct6Xxx
Technical data, functional description, installation SCT6xxx 3.5.1 Technical data SCT6101 | Split-core current transformer for primary currents 60...150 A, accuracy class 3 Technical data SCT6101-xxxx Accuracy class Primary current 60…150 A Secondary current Max. diameter round conductor 18.5 mm Size 36 mm x 62 mm x 50 mm Dimensions [} 52] (W x H x D) Approvals/markings Versions... - Page 53 Technical data, functional description, installation SCT6311 | Split-core current transformer for primary currents 200/250 A, accuracy class 1 Technical data SCT6311-xxxx Accuracy class Primary current 200/250 A Secondary current Max. diameter round conductor 18.5 mm Size 49 mm x 80 mm x 59 mm Dimensions [} 55] (W x H x D) Approvals/markings Versions...
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Page 54: Fig. 42 Sct63Xx Dimensions, Size
Technical data, functional description, installation SCT63xx dimensions, size 3 Fig. 42: SCT63xx dimensions, size 3 SCT6411 | Split-core current transformer for primary currents 300...500 A, accuracy class 1 Technical data SCT6411-xxxx Accuracy class Primary current 300…500 A Secondary current Max. diameter round conductor 27.9 mm Size 49 mm x 80 mm x 59 mm... -
Page 55: Fig. 43 Sct64Xx Dimensions, Size
Technical data, functional description, installation Versions SCT6421-0400 current ratio 400/1 A, rated power 0.5 VA SCT6421-0500 current ratio 500/1 A, rated power 1 VA SCT64xx dimensions, size 4 Fig. 43: SCT64xx dimensions, size 4 SCT6615 | Split-core current transformer for primary currents 600/750 A, accuracy class 1 Technical data SCT6615-xxxx Accuracy class... -
Page 56: Fig. 44 Sct66Xx Dimensions, Size
Technical data, functional description, installation SCT6625 | Split-core current transformer for primary currents 600/750 A, accuracy class 0.5 Technical data SCT6625-xxxx Accuracy class Primary current 600/750 A Secondary current Max. diameter round conductor 42.4 mm Size 72 mm x 120 mm x 98 mm Dimensions [} 56] (W x H x D) Approvals/markings Versions... -
Page 57: Functional Description
Technical data, functional description, installation Versions SCT6715-0800 current ratio 800/5 A, rated power 5 VA SCT6715-1000 current ratio 1000/5 A, rated power 5 VA SCT6725 | Split-core current transformer for primary currents 800/1000 A, accuracy class 0.5 Technical data SCT6725-xxxx Accuracy class Primary current 800/1000 A Secondary current Max. - Page 58 Technical data, functional description, installation Due to the measuring principle used, these current transformers are suitable only for use in AC mains systems. Mounting information The SCT6xxx series is suitable only for mounting on insulated primary conductors! Version: 1.1 SCTxxxx...
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Page 59: Installation
Technical data, functional description, installation 3.5.3 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. •... - Page 60 Technical data, functional description, installation Measuring circuit Fig. 46: Measuring circuit - SCT6xxx transformer, brown conductor: S1; blue conductor: S2 Assembly notes Fig. 47: Inserting the fixing clasps Version: 1.1 SCTxxxx...
- Page 61 Technical data, functional description, installation Fig. 48: Sealing option with the types SCT63xx, SCT64xx, SCT66xx Fig. 49: With the SCT67xx types, the lower half of the core can be removed for easier mounting. Accessories Fig. 50: SCT63xx / SCT64xx, snap-on mounting for 35 mm DIN rail, ZB8201-0630 SCTxxxx Version: 1.1...
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Page 62: Maintenance And Inspection
Technical data, functional description, installation 3.5.4 Maintenance and inspection Maintenance and inspection • Check whether the secondary conductors are firmly connected to the measuring device. • Check whether the current transformer is connected correctly. • Open circuit: Current transformers must be short-circuited as long as no tapping occurs! Note the danger warnings [} 59] in the chapter "Installation [} 59]"! •... -
Page 63: Troubleshooting
Technical data, functional description, installation 3.5.5 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 64: Sct7Xxx
Technical data, functional description, installation SCT7xxx 3.6.1 Technical data SCT7105 | Busbar split-core current transformer for primary currents 100/200 A, accuracy class 3 Technical data SCT7105-xxxx Accuracy class Primary current 100/200 A Secondary current Max. diameter round conductor 20 mm Possible bar dimensions 20 x 30 mm Size 93 mm x 106 mm x 58 mm... - Page 65 Technical data, functional description, installation SCT7215 | Busbar split-core current transformer for primary currents 500/600 A, accuracy class 1 Technical data SCT7215-xxxx Accuracy class Primary current 500/600 A Secondary current Max. diameter round conductor 50 mm Possible bar dimensions 50 x 80 mm Size 125 mm x 158 mm x 58 mm Dimensions [} 68] (W x H x D) Versions SCT7215-0500...
- Page 66 Technical data, functional description, installation SCT7325 | Busbar split-core current transformer for primary currents 750...1500 A, accuracy class 0.5 Technical data SCT7325-xxxx Accuracy class Primary current 750…1500 A Secondary current Max. diameter round conductor 80 mm Possible bar dimensions 80 x 120 mm Size 155 mm x 198 mm x 58 mm Dimensions [} 68] (W x H x D) Versions SCT7325-0750...
- Page 67 Technical data, functional description, installation SCT7425 | Busbar split-core current transformer for primary currents 1500...5000 A, accuracy class 0.5 Technical data SCT7425-xxxx Accuracy class Primary current 1500…5000 A Secondary current Max. diameter round conductor 80 mm Possible bar dimensions 80 x 160 mm Size 195 mm x 243 mm x 79 mm Dimensions [} 68] (W x H x D) Versions SCT7425-1500...
- Page 68 Technical data, functional description, installation SCT7xxx dimensions, sizes 1 - 4 Fig. 51: SCT7xxx dimensions, sizes 1 - 4 Dimension SCT71xx SCT72xx SCT73xx SCT74xx (size 1) (size 2) (size 3) (size 4) (Width in mm) (Height in mm) C / C1 34 / 58 24 / 58 34 / 58...
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Page 69: Functional Description
Technical data, functional description, installation 3.6.2 Functional description Current transformers from the KBU series are inductive, single-conductor current transformers that operate according to the transformer principle. They serve to adapt the primary measured variable to the input rating of the connected measuring devices. Due to the measuring principle used, these current transformers are suitable only for use in AC mains systems. -
Page 70: Installation
Technical data, functional description, installation 3.6.3 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. •... - Page 71 Technical data, functional description, installation Measuring circuit Fig. 52: Measuring circuit - SCT7xxx transformer Assembly notes Fig. 53: Buttons to open the SCT7xxx SCTxxxx Version: 1.1...
- Page 72 Technical data, functional description, installation Fig. 54: Knurled screw of the SCT74xx Version: 1.1 SCTxxxx...
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Page 73: Maintenance And Inspection
Technical data, functional description, installation 3.6.4 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 [} 70] in the chapter "Installation [} 70]"! •... -
Page 74: Troubleshooting
Technical data, functional description, installation 3.6.5 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 75: 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 76 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. 56: 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.
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Page 77: Appendix
Appendix Appendix UL notes "Conditions of Acceptability" for SCT1xxx Conditions of Acceptability • These devices shall be installed within equipment that will provide an acceptable enclo- sure. • The acceptability of the mounting means for these transformers shall be determined in the end-use application. -
Page 78: 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/english/beckhoff/world.htm You will also find further documentation for Beckhoff components there. - Page 79 List of figures List of figures Fig. 1 SCT current transformers ......................Fig. 2 Designation key of the SCT current transformers................ Fig. 3 SCT0xxx ............................Fig. 4 SCT1xxx ............................Fig. 5 SCT2xxx ............................Fig. 6 SCT3xxx ............................Fig. 7 SCT6xxx ............................Fig.
- Page 80 List of figures Fig. 45 SCT67xx dimensions, size 7 ....................... Fig. 46 Measuring circuit - SCT6xxx transformer,brown conductor: S1; blue conductor: S2 ....Fig. 47 Inserting the fixing clasps ......................Fig. 48 Sealing option with the types SCT63xx, SCT64xx, SCT66xx............Fig.