Designed for measuring and accounting of act and reactive energy in 3 ph. three- or four-wire AC circuits. They conduct: measurement and accounting of active energy in two directions, reactive energy inductive and capacitive, SEE transf-connection measurement and accounting of reactive energy in each of the 4 quadrants; accounting of EE differentiated by zones of the day in accordance with the tariff schedule.The principle of operation is based on the measurement of instantaneous values of signals I and U with the subsequent calculation of active and reactive energy, active, reactive and total power, the current values of I and U, K power and F-network.
It consists of the following units:
I and U sensors;power supply + backup power input;counting mechanism with non-volatile memory, real-time clock and LCD; backup power supply; relay unit in the meter of direct connection;interface circuits;test output;discrete inputs and/or outputs.
Current sensors - I or current transducers and low impedance shunts. U sensor is a resistive divider.
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