Beckhoff SCT Series Documentation page 19

3-phase ring-type current transformers
Fig. 10: SCT3xxx
The compact SCT3xxx 3-phase ring-type current transformers for direct mounting below 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
SCT3xxx series is available throughout in accuracy class 1 and is supplemented by the SCT3121-0125 and
SCT3121-0150 current transformers in accuracy class 0.5.
3-phase ring-type current transformers
Accuracy class 1,
SCT3111
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 (size 1)
Accuracy class 0.5,
SCT3121
Primary current 3 x 0...125 A AC / 3 x 0...150 A AC,
Secondary current 1 A,
Max. diameter round conductor 13.5 mm (size 1)
Accuracy class 1,
SCT3215
Primary current 3 x 0...100 A AC to 3 x 0...250 A AC,
Secondary current 5 A AC,
Max. diameter round conductor 18 mm (size 2)
Accuracy class 1,
SCT3225
Primary current 3 x 0...250 A AC to 3 x 0...600 A AC,
Secondary current 5 A AC,
Max. diameter round conductor 22 mm (size 3)
SCT5xxx Version: 1.0
Product overview
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