EL3403-xxxx - Introduction
3-Phase Power Measurement Terminal
The 3-phase Power Measurement Terminal EL3403-xxxx 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 at the terminal points IL1, IL2, IL3 and IN.
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. Direct voltage and current measurement is not possible with the EL3403. The cut-off frequency of the calculations amount to 260 Hz. 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 EL3403 provides rms values in the process image, without requiring high computing capacity on the controller. From the effective values for voltage (U) and current (I), the EL3403 calculates the effective 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 (φ), for example, can easily be derived.
The EL3403 thus enables a comprehensive network analysis to be carried out via the fieldbus. Based on the values for voltage, current, effective 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.
The EL3403-0010 is a version with an extended measuring range of up to 5 A (AC). The EL3403-0100 version measures currents up to 100 mA (AC).
In the EL3403-0111, the current measurement range for channel 1 is 1,000 mA, for channel 2 100 mA and for channel 3 10 mA. Please note the technical data and the scaling factors.
The EL3403-0333 is designed for usage with 333 mV transformers.