SEB-2A.07

PURPOSE AND FIELD OF APPLICATION

    The meter is designed for multitariff accounting of active energy in two-wire power circuits of a.c. with the frequency of 50Hz which is differentiated on light conditions, power level and energy consumption level.

    The meters have a telemetric interface and a digital communication interface (optical port or RS-485) what makes it possible to use them as a component of any automated information-measuring systems for commercial energy accounting (AIISKUE).

    The electricity meters have some modifications which differ in temperature range, indication option: the electrical and mechanical reading device or liquid-crystal display, type of current measurement device which is connected to the power network (current transformer, combined current sensor or shunt), accuracy class, availability of electrical seal, communication interface (RS-485 or optical port).

NORMATIVE AND LEGAL BACKING

    IEC 62052-11:2003

TECHNICAL FEATURES

• Internal four-tariff tasksetter (for 12 seasons).
• 9 tariff zones per day.
• Nonvolatile memory.
• Communication interface - RS-485 or optical port.
• Programmable pulse output (power control mode and output automaton shutdown mode. Inspection, calibration testing, telemetry).
• Indication type - liquid-crystal display or mechanical reading device.
• A current transformer, a shunt or a combined sensor (current transformer and shunt) is used as a current sensor.
• Possibility to connect an external alternate power source (9-12 V) to read indication of the liquid-crystal display in the absence of 230V.
• Electronic seal (option)

FUNCTIONAL CAPABILITIES

    The meter makes it possible to store in the nonvolatile memory data on the quantity of measured electric energy:

• value of measured active energy with accrual accounting from the date of production as per all the tariffs;
• value of active energy measured as at the beginning of each month as per all the tariffs;
• value of measured active energy with accrual accounting with exceeding the power limit as per all the tariffs;
• value of measured active energy and maximum power of each half-hour of the month in the course of two months (two power curves);
• registration and storage of the time data when the meter was energized and de-energized;
• registration of the time when the protective terminal cover was opened, for the meters with electronic seal.

    The electricity meters have the possibility to reprogramme through RS-485 interface or optical port the following parameters:

• data rate;
• multipart password, individual password and address.

    The electricity meters have the possibility to read and reprogramme through RS-485 interface or optical port the following parameters:

• category of a consumer;
• holiday schedule;
• annual tariff schedule (for every day of the week and holiday of the month);
• power limit and monthly energy limit;
• permission and prohibition for automatic changing-over to ‘summer’ or ‘winter’ time;
• current time and date;
• function of changing the pulse output: to the meter calibration mode or to energy control regime with the possibility to form a tripping signal;
• indication mode and indication time in the range from 6 to 60 sec (of the meter with liquid-crystal display);
• permission for one-tariff operating mode of the meter.

TECHNICAL DATA

Quantity	Value
Recalibration interval, years	10
Frequency range of measuring network, Hz	from 47,5 to 52,5
Nominal/maximum current, À	5 (50), 10 (100)
Accuracy class	1 (2)
Threshold sensitivity for the meters with Ibase=5 À:
of accuracy class 1, mÀ	20
of accuracy class 2, mÀ	25
Threshold sensitivity for the meters with Ibase=10 À:
of accuracy class 1, mÀ	40
of accuracy class 2, mÀ	50
Value of a dial mechanism digit, kwh
less significant digit	0,1
more significant digit	10000
Value of the least significant digit of the meter’s memory (accessible with the help of interface), kwh	0,001
Number of pulse outputs	1
Power source of pulse output:
voltage, V	24
strength of current, mA	30
Transmission ratio of pulse output unit of the meters with Ibase=5 À:
in the main mode, pulses/kwh	500
in calibration mode, pulses/kwh	10000
Transmission ratio of pulse output unit of the meters with Ibase=10 À:
in the main mode, pulses/kwh	250
in calibration mode, pulses/kwh	5000
Accuracy movement of internal timer clock at normal temperature with or without supply voltage till 10 years, sec/day	±0, 5
Total power consumed by voltage circuit, not more than, V·À	7,5
Active power consumed by voltage circuit, not more than, W	1,6
Average error-free running time, h	88000
Average service life, years	30
Mass of the meter, not more than, kg	0,85
Measurements, not more than, mm	179õ140õ75 (65)
Reserve supply voltage	from 9 to 12 V

MODIFICATIONS