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2 METER DESCRIPTION
2.1 Purpose
The meter is single-phase, multifunctional, direct connection, and is designed to measure active and reactive
electric energy in single-phase AC circuits.
The meter has the following functions:
• multi-tariff electricity metering (with three tariff levels - event-based, external and time-based tariffing);
• maintenance of the retrospective (recording the current values of energy storage devices: at the end of the
billing period (month), at the end of the day, at the end of the year and upon occurrence of a specific event);
• maintaining a load profile, with the ability to customize the type of the parameters stored and the averaging
time;
• measuring network parameters: voltage frequency, current in the phase and neutral wires, voltage, angle
between current and voltage, active power factor, active, reactive and apparent power;
• measuring Unified Power Quality Index (UPQI) in accordance with class «S» of the measurement process
specifications in IEC 61000-4-30:2008: stable voltage deviation, network frequency deviation, duration and depth
of voltage dips, duration and maximum value of overvoltage, interruptions in power supply;
• power quality analysis for compliance with quality standards in accordance with EN50160:2010;
• indicating the instance of violating an individual power quality indicator on the LCD (disabled by default);
• recording the violation of an individual power quality indicator (event logs available for reading on the interface);
• monitoring active power consumption;
• monitoring «instantaneous power» consumption;
• monitoring active energy consumption (control of energy limits, prepaid mode, low consumption control);
• monitoring supply network voltage;
• monitoring current;
• monitoring network frequency;
• monitoring the oncoming power flow (in the phase and neutral wires);