Beckhoff SCJ6625, Manual

Page: 8 / 53

Product overview
SCT6xxx 8 Version: 1.3
2 Product overview
2.1 Introduction
SCTxxxx | Current transformers for power measurement
Fig. 1: SCT current transformers
The SCT current transformers allow reliable power sensor technology to be implemented directly in the field
as an integral part of the PC-based control system. Users can choose between two concepts, which are
highly scalable thanks to various designs and performance classes and are thus suitable for any application.
The SCT series portfolio is extremely diversified, ranging from the low-cost 3-phase transformer sets for
properties and standard industrial transformers for mechanical engineering, through to solutions for test
benches with particularly high requirements for accuracy.
The choice of the right product category [
}
14] depends on the type of usage:
Whilst the data acquisition can be implemented cost-efficiently and with high measurement accuracy using
the ring-type current transformers, particularly in new systems, the split-core current transformers are
suitable as an uncomplicated retrofit solution due to the simplicity of their attachment.
The SCT5xxx transformers occupy a special position. These are not intended for energy measurement, but
are specially designed for highly accurate detection of differential currents. In addition, unlike the other SCT
transformers, they are also suitable for DC currents and thus meet the differential current detection
according to the Type B definition. Therefore, AC as well as DC currents up to 100 kHz can be measured by
a fluxgate measuring principle.