Static Three-Phase Multirate Energy Meter Milur 307 for Energy Management

"Static, unidirectional three-phase multitariff universal transformer or direct inclusion meter, with built-in microcontroller and with a variety of interfaces counting mechanism to exchange information with external devices. The meter of direct inclusion is designed for accounting of active and reactive electric energy in four-wire AC networks with nominal voltage of 3x230/400V. The basic (maximum) current is 5(100) A.

The meter, switched on through a current transformer, is designed for accounting of active and reactive electrical energy in four-wire AC networks with nominal voltage of 3x230/400V. Rated (maximum) current is 5(10)A. The meter, included through current and voltage transformers, is designed for metering of active and reactive electrical energy in four-wire AC networks with nominal voltage of 3x57.7/100V.

Rated (maximum) current is 5(10)A. The meter is produced in the case: <ul> <li>- 9mTN35 - mounting on the rail TN35 according to GOST R IEC 60715 (DIN-rail), width 157 mm (9 modules of 17.5 mm), IP51.</li> </ul>For each modification of the counters there is a release of versions containing the following additional devices or functions: <ul> <li>- additional communication interface (RS-485, RF868, PLC, PLC.G3/RF868, ZigBee);</li> <li>programmable load switching on/off control output.</li> </ul>Display of consumed electrical energy is carried out on the liquid crystal display (hereinafter - LCD) of the meter. The meter displays readings directly in kilowatt-hours (kWh) when measuring active energy and in kilovar-hours (kvar-h) when measuring reactive energy.

reactive energy measurement. The amount of stored electricity is displayed as eight digits, with the three or two lower digits separated by a comma, representing thousandths or hundredths of kWh (kvarh) for transformer or direct current meters, respectively. The LCD displays:

• - values of accumulated cumulative total of active and reactive energy

for each (up to 8) tariffs with indication of the tariff number;

• - total (for all tariffs) value of accumulated cumulative total active and reactive energy

consumed active and reactive energy;

• - current active, reactive and total power for each phase and

total value (reference value);

• - voltage and current for each phase (reference value);
• mains frequency (reference value);
• power factor per phase and total value (reference value); power factor per phase and total value (reference value); power factor per phase and total value (reference value).

value);

• - phase shift between current and voltage in each phase (reference value); phase shift between current and voltage in each phase (reference value); phase shift between current and voltage in each phase (reference value).

value);

• - phase shift between phase voltages (reference value);
• absence of phase voltage (flashing symbol for phase A, B or C);
• open key symbol (if the terminal block cover is not fitted);
• backup battery voltage (reference value);
• current time and date;
• network address of the meter;
• software version;
• software numeric identifier;
• date and time of the last access to the optional interface.

Meters provide registration and storage in non-volatile memory the following information:

• - values of metered active and reactive energy accumulated cumulatively from the moment of manufacture

total and for each (up to 8) tariffs;

• - values of metered active and reactive energy by tariffs for each month of the year;
• values of metered active and reactive energy per day according to tariffs for the last 123 days;
• values of metered active and reactive energy, as well as maximum active and reactive power

half-hourly power slices for the last 123 days;

• - instantaneous values of active, reactive and full load power

phase by phase and total value (reference value);

• - instantaneous values of effective voltage and current for each phase

(reference value);

• - clock calibration factor;
• voltage of the built-in battery of the backup power supply (reference value); voltage of the built-in battery of the backup power supply (reference value)

reference value);

• - annual tariff schedule and exceptional (public) days;
• modification and serial (factory) number of the meter;
• serial number of the printing unit;
• software version number (identification number);
• digital identifier (checksum) of the software;
• time and date of opening of terminal covers;
• power on/off time;
• time and date of the start and end of magnetic field exposure."

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