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Application example

SCT7xxx

Version: 1.2

• The current is measured via 4 current transformers (e.g. from the Beckhoff

SCT

series) and the

connections I

, 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.

Содержание SCT7 Series

Страница 1: ...Documentation EN SCT7xxx Busbar split core current transformers 2021 04 12 Version 1 2...

Страница 2: ......

Страница 3: ...t transformer for primary currents 0 500 0 600 A accuracy class 1 size 2 28 3 2 3 SCT7225 Busbar split core current transformer for primary currents 0 500 0 600 A accuracy class 0 5 size 2 29 3 3 SCT7...

Страница 4: ...Table of contents SCT7xxx 4 Version 1 2...

Страница 5: ...ety over EtherCAT 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 pa...

Страница 6: ...he 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 doc...

Страница 7: ...ged 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 appl...

Страница 8: ...d 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...

Страница 9: ...mary side The windings are usually wound on an alternating magnetic ferrite ring core A typical transformer type is the ring core or ring type current transformer The current rail or current carrying...

Страница 10: ...DE 0141 01 2000 paragraph 5 3 4 current and voltage transformers for nomi nal voltages from Um 3 6 kV must be grounded on the secondary side For low voltages Um 1 2 kV grounding is not required if the...

Страница 11: ...in the primary winding at which the overtemperature does not exceed the value specified in the standard with the secondary winding loaded with the rated load Rated short time thermal current Ith Valu...

Страница 12: ...ct overview SCT7xxx 12 Version 1 2 2 3 Product categories SCTxxxx current transformer Breakdown of the type designation of the SCT current transformer Fig 4 Designation key of the SCT current transfor...

Страница 13: ...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...

Страница 14: ...stallation spaces e g directly in the sub distribution unit Two current transformers are attached to the DIN rail while the third current transformer in plugged into the fastened current transformers...

Страница 15: ...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 technolo...

Страница 16: ...conductor 43 7 mm size 3 SCT2321 Accuracy class 0 5 primary current 0 800 A AC 1000 A AC secondary current 1 A AC max diameter round conductor 43 7 mm size 3 SCT2411 Accuracy class 1 primary current 0...

Страница 17: ...mers in accuracy class 0 5 3 phase ring type current transformers SCT3111 Accuracy class 1 primary current 3 x 0 50 A AC to 3 x 0 150 A AC secondary current 1 A AC max diameter round conductor 13 5 mm...

Страница 18: ...onductor 18 5 mm size 3 SCT6321 Accuracy class 0 5 primary current 0 200 A AC 0 250 A AC secondary current 1 A AC max diameter round conductor 18 5 mm size 3 SCT6411 Accuracy class 1 primary current 0...

Страница 19: ...ze 1 SCT7125 Accuracy class 0 5 primary current 0 400 A AC secondary current 5 A AC max diameter round conductor 20 mm size 1 SCT7215 Accuracy class 1 primary current 0 500 A AC 0 600 A AC secondary c...

Страница 20: ...ables show the fault limit values taking into account the rated current values Class accuracy Current error in at of rated current 5 20 50 100 120 0 5 1 5 0 75 0 5 0 5 1 3 0 1 5 1 0 1 0 3 3 3 Class ac...

Страница 21: ...temperature range during operation 5 40 C Permissible ambient temperature range during storage 25 70 C Permissible relative humidi 5 85 Operating height Up to 1000 m Protection class IP20 Insulation...

Страница 22: ...Technical data SCT7xxx 22 Version 1 2 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...

Страница 23: ...transformer for primary currents 0 100 A 0 200 A accuracy class 3 size 1 Technical data SCT7105 xxxx Accuracy class 3 Primary current 0 100 A AC 0 200 A AC Secondary current 5 A AC Versions SCT7105 01...

Страница 24: ...t transformer for primary current 0 250 V 0 400 A accuracy class 1 size 1 Technical data SCT7115 xxxx Accuracy class 1 Primary current 0 200 A AC 0 400 A AC Secondary current 5 A AC Versions SCT7115 0...

Страница 25: ...125 Busbar split core current transformer for primary current 0 400 A accuracy class 0 5 size 1 Technical data SCT7125 xxxx Accuracy class 0 5 Primary current 0 400 A AC Secondary current 5 A AC Versi...

Страница 26: ...ure range during operation 5 40 C Permissible ambient temperature range during storage 25 70 C Permissible relative humidi 5 85 Operating height Up to 1000 m Protection class IP20 Insulation character...

Страница 27: ...Technical data SCT7xxx 27 Version 1 2 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...

Страница 28: ...transformer for primary currents 0 500 0 600 A accuracy class 1 size 2 Technical data SCT7215 xxxx Accuracy class 1 Primary current 0 500 A AC 0 600 A AC Secondary current 5 A AC Versions SCT7215 050...

Страница 29: ...ransformer for primary currents 0 500 0 600 A accuracy class 0 5 size 2 Technical data SCT7225 xxxx Accuracy class 0 5 Primary current 0 500 A AC 0 600 A AC Secondary current 5 A AC Versions SCT7225 0...

Страница 30: ...re range during operation 5 40 C Permissible ambient temperature range during storage 25 70 C Permissible relative humidi 5 85 Operating height Up to 1000 m Protection class IP20 Insulation characteri...

Страница 31: ...Technical data SCT7xxx 31 Version 1 2 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...

Страница 32: ...currents 0 750 to 0 1500 A accuracy class 1 size 3 Technical data SCT7315 xxxx Accuracy class 1 Primary current 0 750 A AC to 0 1500 A AC Secondary current 5 A AC Versions SCT7315 0750 ratio 750 5 rat...

Страница 33: ...rents 0 750 to 0 1500 A accuracy class 0 5 size 3 Technical data SCT7325 xxxx Accuracy class 0 5 Primary current 0 750 A AC to 0 1500 A AC Secondary current 5 A AC Versions SCT7325 0750 ratio 750 5 ra...

Страница 34: ...re range during operation 5 40 C Permissible ambient temperature range during storage 25 70 C Permissible relative humidi 5 85 Operating height Up to 1000 m Protection class IP20 Insulation characteri...

Страница 35: ...Technical data SCT7xxx 35 Version 1 2 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...

Страница 36: ...CT7415 xxxx Accuracy class 1 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 SCT7415 2000 ratio 2000 5 rated power 15 VA SCT741...

Страница 37: ...CT7425 xxxx Accuracy class 0 5 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 SCT7425 2000 ratio 2000 5 rated power 15 VA SCT7...

Страница 38: ...ion of the current transformer without secondary wiring must be avoided at all costs Make sure that the working environment is safe during assembly maintenance and installation work Interrupt the powe...

Страница 39: ...Commissioning SCT7xxx 39 Version 1 2 Measuring circuit Fig 20 Measuring circuit SCT7xxx transformer Assembly notes Fig 21 Buttons to open the SCT7xxx...

Страница 40: ...Commissioning SCT7xxx 40 Version 1 2 Fig 22 Knurled screw of the SCT74xx...

Страница 41: ...ormer 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 Check whether the cu...

Страница 42: ...corresponding voltage tap off if the active and or reactive power does not correspond to the expected values if necessary one phase has been reversed Check whether the current transformer is connecte...

Страница 43: ...ured 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 IL1 IL2 IL3 and IN star point of the current transformer...

Страница 44: ...e Beckhoff SCT series and the connections IL1 IL2 IL3 and IN star point of the current transformers Fig 24 EL3453 power measurement at a machine Negative power values If negative power values are meas...

Страница 45: ...SCT7xxx 45 Version 1 2 6 Appendix 6 1 Documentation issue status Version Comment 1 2 Addenda chapter Notes on class accuracy SCT transformers 1 1 Addenda corrections 1 0 1st public issue Addenda corr...

Страница 46: ...here Beckhoff Support Support offers you comprehensive technical assistance helping you not only with the application of individual Beckhoff products but also with other wide ranging services support...

Страница 47: ......

Страница 48: ...Beckhoff Automation GmbH Co KG H lshorstweg 20 33415 Verl Germany Phone 49 5246 9630 info beckhoff com www beckhoff com More Information www beckhoff com SCT7xxx...

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