Table of contents
SCT3xxx 3Version: 1.4
Table of contents
1 Foreword....................................................................................................................................................5
1.1 Notes on the documentation .............................................................................................................5
1.2 Safety instructions.............................................................................................................................5
2 Product overview ......................................................................................................................................8
2.1 Introduction .......................................................................................................................................8
2.2 Basics current transformers ..............................................................................................................9
2.3 Product categories – SCTxxxx current transformer ........................................................................14
2.4 Notes on class accuracy SCT transformers....................................................................................23
3 Technical data .........................................................................................................................................24
3.1 SCT31xx | 3-phase ring-type current transformers, size 1..............................................................24
3.1.1 SCT31xx | General...........................................................................................................24
3.1.2 SCT3111 | 3-phase ring-type current transformer for primary currents 3 x 0...50 A AC to 3
x 0....150 A AC, accuracy class 1, size 1 ......................................................................... 26
3.1.3 SCT3121 | 3-phase ring-type current transformer for primary currents 3 x 0...125 A AC / 3
x 0...150 A AC, accuracy class 0.5, size 1 ....................................................................... 27
3.2 SCT32xx | 3-phase ring-type current transformers, size 2..............................................................28
3.2.1 SCT32xx | General...........................................................................................................28
3.2.2 SCT3215 | 3-phase ring-type current transformer for primary currents 3 x 0...100 A AC to
3 x 0...250 A AC, accuracy class 1, size 2 ....................................................................... 30
3.3 SCT33xx | 3-phase ring-type current transformers, size 3..............................................................31
3.3.1 SCT33xx | General...........................................................................................................31
3.3.2 SCT3315 | 3-phase ring-type current transformer for primary currents 3 x 0...250 A AC to
3 x 0...600 A AC, accuracy class 1, size 3 ....................................................................... 33
4 Commissioning .......................................................................................................................................34
5 Application example ...............................................................................................................................39
5.1 Power measurement at a machine .................................................................................................39
6 Appendix..................................................................................................................................................41
6.1 Documentation issue status ............................................................................................................41
6.2 UL notes..........................................................................................................................................42
6.3 Support and Service........................................................................................................................ 43
