Energy Meter Working Principle
Smart electric energy meters by some energy meter supplier use shunts or
current transformers to turn current signals into small signals that can be used for electronic measurement,
and use different types of energy meters voltage dividers or voltage transformers to turn voltage signals into small signals that can be used
for electronic measurement, and then use dedicated energy measurement. The chip converts analogue signals from voltage transformers
and current transformers into digital signals, and performs digital integration operations on them, and then outputs a pulse signal whose
frequency is proportional to the electrical energy. The pulse signal is sent to the microcomputer for processing and then displayed on
the liquid crystal.
Energy Meter Function
Display power, demand, voltage, current, power, time, remaining amount and other values, the number of display digits is not less than 8 digits,
and the displayed decimal place can be set; the displayed value unit should adopt the national legal unit of measurement, such as kW, kvar, kWh, kvarh, V, A, etc.
Measure operating parameters such as total and split-phase active power, reactive power, power factor, split-phase voltage, split-phase current, frequency and so on.
Alarm functions include loss of voltage, loss of current, reverse sequence, overload, battery undervoltage, etc.
It has dual protection measures of programming switch and programming password to prevent unauthorized persons from performing programming operations.