Beckhoff EL3783 Documentation page 16

Product overview
• The voltage and current curve can have any form; the EL3783 is thus suitable only for AC
measurements
• the EL3783 can be synchronized with other EtherCAT device over Distributed Clocks, but can also be
operated without Distributed Clocks with oversampling
• no pre-evaluations or calculations of the amplitude values take place in the EL3783
Hence, the EL3783 is suitable for very different applications, for example
• 3-phase monitoring: the voltage and current to N are measured for a 3-phase load
• 3-load monitoring: the voltage and current to N can be measured for 3 loads even if connected to the
same phase
• each channel can measure as desired, provided the measured is referred to N
• Measurement of non-sinusoidal amplitude curves, including rectangular
Evaluations and calculations of the raw data sent to the controller, such as active power (P), cumulative
power consumption (W) or power factor (cos φ) must take place in the controller. The controller has sufficient
computing power for true RMS or performance calculation and complex custom algorithms based on the
measured voltages and currents.
Design of voltage measuring range
Low-voltage power supply systems are defined, for example, in IEC 60038. Since 2003 the specifi-
cation here is 230/400 V
be measured, the EL3783 supports a measuring range of 520 V
16
±10%, corresponding to ±357 V
RMS
Version: 1.1
. So that substantial spikes can also
peak
AC, corresponding to ±737 V
RMS
.
peak
EL3783