Current Transformers From Beckhoff; Fig. 7 Sct Current Transformers - Starting Point Of The Beckhoff Measurement Chain - Beckhoff KS3403 Installation Manual

Product overview
On the voltage measurement side, a KL3403 is equipped with a protection impedance of 500 kΩ. If the
neutral conductor is not connected and only one connection on the side of the voltage measurement is live,
the resulting voltage against earth in a 3-phase system with a phase-to-phase voltage of 400 V
This should also be measured on the side of the current measurement using a multimeter with an internal
resistance of 10 MΩ, which does not represent an insulation fault.
Additional measuring instruments in the current circuit
Please note that the addition of additional measuring instruments (e.g. ammeters) in the current circuit can
lead to a significant increase in the total apparent power.
Furthermore, connection I
Additional measuring instruments therefore have to be potential-free and must be wired accordingly.
2.5.1

Current transformers from Beckhoff

With the seamless completion of the power measurement chain from the sensor to the cloud Beckhoff
enables a much simpler energy management system and at the same time optimizes the availability of
machines and systems. Constant power measurement across the board allows comprehensive inline
analyses to be carried out, which record any deviation and enable quick intervention.
Fig. 7: SCT current transformers - Starting point of the Beckhoff measurement chain
All current transformers available from Beckhoff can be found on the internet at
https://www.beckhoff.com/sct
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 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.
• as ring-type or split-core current transformers
• for new systems and for retrofits
• various designs and performance classes
• wide application range from properties to test benches
18
of the KL3403 must represent a star point for the three secondary windings.
N
Version: 3.2.0
is 230 V .
AC AC
KL3403/KS3403