Three-phase energy meter with current transformer 1/5A or direct connection up to 80A (additionally with 20mA analogue output for instantaneous active or reactive power)

The EZD-S0 electronic energy meter is used to detect the import and export active and reactive energy in three-phase systems regardless of load. It is used in industrial plant, workshops, machinery and offices etc. The energy values are displayed, stored and made available in the form of pulses for further processing. The instantaneous active or reactive power can be output via an analogue output (20 mA). All values for current, voltage, frequency, power, work and rotary field can be read off the LCD display. The connection is made via a current transformer with a secondary rated current of 1 or 5 amps.

Function

The quantities to be measured reach an integrated module via external and internal current transformers and a voltage divider. The instantaneous values of current and voltage are detected here. A microcontroller takes over the evaluation, the output of the pulses and the storage of the measured values.

The values are shown on an LCD display. The pulsed output of active or reactive energy is made possible via two open-collector transistor outputs (S0 interfaces). An analogue output of 20 mA represents the instantaneous active or reactive power.

A separate supply voltage is not required since this is obtained from the measuring voltage. The meter readings and programming are stored in the event of mains failure.