Introduction

Power monitoring oversampling terminal for 690 V

The EL3783 EtherCAT Terminal is designed as a power monitoring terminal for the state monitoring of a 3-phase AC voltage system (rated mains voltage 400/690 V_rms). For each phase voltages up to 520 V_rms and currents up to 6.5 A_rms are sampled as instantaneous values with a resolution of 16 bit.

The six channels are measured simultaneously based on the EtherCAT oversampling principle with a temporal resolution of 50 µs and passed on to 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.

Through the oversampling principle the terminal is able to measure at significantly shorter intervals than the cycle time of the controller. AC parameters must be connected and measured with a common reference potential.
The EL3783 supports distributed clocks for measuring synchronously with other EtherCAT devices, but can also be operated without distributed clocks.

The EL3783-0100 terminal is specially optimized for use including voltage transformers.
It has an adapted voltage range that corresponds to typical secondary-side outputs of voltage transformers.

RMS value (rms) specifications All AC value specifications in this documentation such as RMS specifications (rms) refer to a 50/60 Hz 3-phase mains network with a sinusoidal waveform (crest factor 1.414).