Beckhoff KL3403 Series, Documentation

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Product overview
KL3403 12 Version: 3.1.0
2 Product overview
2.1 Introduction
Fig. 2: KL3403
The 3-phase Power Measurement Terminal KL3403 enables the measurement of the electrical data of a
three-phase supply network:
• The voltage is measured via the connection of the network at the terminal points L1, L2, L3 and N.
• The current of the three phases is fed in via current transformers [
}
20] at the terminal points I
L1
, I
L2
, I
L3
and I
N
.
Non-sinusoidal voltage and current curves can also be read in with a practical accuracy of 1 % to 5 %,
depending on the shape of the curve. The limit frequency of the calculations amount to 2 kHz. As the time
interval for calculating the values can be adjusted, optimization is possible under a very wide range of
circumstances.
Pre-processing of the KL3403 provides rms values in the process image, without requiring high computing
power on the controller. From the effective values for voltage (U) and current (I), the KL3403 calculates the
active power (P), the energy consumption (W) and the power factor (cos φ) for each phase. From these
values the apparent power (S) and the phase shift angle (j), for example, can easily be derived.
The KL3403 thus enables a comprehensive network analysis to be carried out via the fieldbus. Based on the
values for voltage, current, active power, apparent power and loading condition, the plant operator can
optimize the supply of a drive or a machine and protect the plant from damage and downtime.