SET-4ÒÌ.03

PURPOSE AND FIELD OF APPLICATION

    The meters are intended for multitariff commercial or technical accounting of active and reactive electrical energy of the forward and reverse direction and four-quadrant reactive energy in three- and four-wire power circuits of alternating current.

    The electricity meters can be used in production enterprises and electric energy systems, can register power flows in electric energy systems and intersystem overflows.

    The meters have several modifications which differ in accuracy class, nominal voltage, number of interfaces and availability of an alternate power unit.

    The meters can be used either independently or as component of:

• automated systems for commercial energy accounting (ASKUE);
• automated dispatch control systems (ASDU).

NORMATIVE AND LEGAL BACKING

    IEC 62052-11:2003

TECHNICAL FEATURES

• Digital signal processing.
• Alternate power unit connected to 220V AC power supply.
• Three independent communication interfaces which are of equal priority: two RS-485 interfaces and optoport.
• Four galvanically separated configurable pulse outputs.
• Nonvolatile memory.
• Built-in real-time clock.
• ModBus-similar, SET-4ÒÌ.02 –compatible exchange protocol.
• Current transformer connection and voltage transformer or direct voltage connection are possible.

FUNCTIONAL CAPABILITIES

    The meters provide  high-accuracy multitariff accounting of active and reactive electric energy of the forward and reverse direction and four-quadrant reactive energy in eight tariff zones, as per eight day types in twelve seasons:

• in total from the date of  meter resetting;
• for the current and preceding year;
• as at the beginning of the current year and of preceding year;
• for the current month and each of preceding 11 months;
• as at the beginning of the current month and of each preceding 11 months;
• for the current and preceding day;
• as at the beginning of the current day and preceding day;
• for each preceding calendar day with the depth of up to 30 days;
• as at the beginning of each preceding calendar day with the depth of up to 30 days.

    Tariff zone increment is 10 minutes. Tariff zones interlace per day is limited to the number of 10-minutes intervals in a day and is 144 intervals. The tasksetter of the meter uses holiday schedule and list of postponed days.

    The electricity meters keep two independent power profile arrays with programmable integration time from 1 to 60 minutes for active and reactive power of the forward and reverse direction. Storing depth of each power profile array with integration time of  30 minutes is 3,7 months.

    The electricity meters can be used as registers of maximum demand for power in the mornings and evenings with the use of 12 Season schedule.

    The electricity meters measure instantaneous values of physical quantities, characterizing three-phase power network, and can be used for measuring:

• active, reactive and total power;
• phase voltage and voltage between phases, positive-sequence voltage;
• current;
• power factor;
• network frequency;
• current waveform distortion factor;
• zero-plus-negative-phase-sequence current unbalance factor;
• waveform distortion factor of phase voltage and voltage between phases;
• zero-plus-negative-phase-sequence voltage unbalance factor.

    According to GOST 13109-97 the electricity meters can be used as power-quality meters under parameters of steady-state deviation of phase voltage (voltage between the phases, positive-sequence voltage) and network frequency.

    The electricity meters allow to form signals indicating programmed power threshold exceeding at the four configurable test outputs.
    The electricity meters keep event logs, power-quality logs, logs concerning power threshold exceeding and a status log.

    The electricity meters provide the possibility to programme, reprogramme, control and read parameters and data through RS-485 interface or optical port (list of parameters and data is in type specification).
    The electricity meters have a liquid-crystal display which indicates accounting and measurement data.

TECHNICAL DATA

Quantity	Value
Nominal voltage, V	3x57,7/100, 3x(120-230)/(208-400)
Nominal (maximum) current, À	from 1 tî 5 (10)
Sensitivity current, mÀ	1
Rated network frequency, Hz	50
Working range of network frequency, Hz	from 47,5 tî 52,5
Accuracy class when measuring in forward and reverse direction:
active energy	0,2S or 0,5S
reactive energy	0,5 or 1
Maximum permissible main error when measuring, %:
voltage (phase voltage, voltage between the phases, positive-sequence voltage and their average values)	±0,4 % in the range from 0,8Unom up to 1,15Unom
current	±0,6% for Inom≤I≤Imax δi=±[0,6+0,1 (Inom/Ix-1)] for 0,01Inom≤I≤Inom
frequency	±0,05 in the range from 47,5 tî 52,5 Hz
Active (total) power consumed by each parallel voltage circuit, not more than, W (VÀ)
Unom 57,7 V	0,8 (1,5)
Unom (120-230) V	1,3 (3,0)
Total power consumed by each serial circuit, not more than, VÀ	0,1
Number of indicated liquid-crystal display digits	8
Accuracy movement of built-in clock at normal conditions when  the meter is switched on/off	better than ±0,5 sec/day
Change of accuracy movement in the working temperature range, sec/°Ñ /day:
when the meter is on in the temperature range from - 40 up to + 60°Ñ	less than ±0,1
when the meter is off in the temperature range from -10 up to + 60 °Ñ	less than ±0,15
when the meter is off in the temperature range from - 40 up to -10 °Ñ	less than ±0,22
Transmission ratio, pulses/(kwh), pulses/(kvarh):
in the main mode (À)	5000 at Unom 57,7 V 1250 at Unom (120-230) V
in calibration mode (Â)	160000 at Unom 57,7 V 40000 at Unom (120-230) V
in calibration mode (Ñ)	2560000 at Unom 57,7 V 640000 at Unom (120-230) V
Rate of data exchange, bit/sec:
through optical port	9600;
via RS-485 interafce	38400, 19200, 9600, 4800, 2400, 1200, 600
Data protection	Two access levels and memory hardware protection of metrological factors
Self-diagnostics	Iterative, incessant
Working and service conditions:
ambient air temperature, °Ñ	from -40 tî +60
relative humidity, %	90 % at 30 °Ñ;
pressure, kPa (mm of mercury)	from 70 to 106,7 (from 537 tî 800)
Average error-free running time, h	90000
Average service life, years	30
Recalibration interval, years	10
Mass of the meter, kg	1,75
Measurements of the meter, mm	330õ170õ80,2

MODIFICATIONS

SET-4ÒÌ.03 modifications	Nominal voltage, V	Accuracy class when measuring active/reactive energy	Number of interfaces	Availability of an alternate power unit	Variant
SET -4ÒÌ.03	57,7/100	0,2S/0,5	2	+
SET- 4ÒÌ.03.01		0,5S/1,0	2	+	-01
SET -4ÒÌ.03.02		0,2S/0,5	1	+	-02
SET -4ÒÌ.03.03		0,5S/1,0	1	+	-03
SET -4ÒÌ.03.04		0,2S/0,5	2	-	-04
ÑÝÒ-4ÒÌ.03.05		0,5S/1,0	2	-	-05
SET -4ÒÌ.03.06		0,2S/0,5	1	-	-06
SET -4ÒÌ.03.07		0,5S/1,0	1	-	-07
SET -4ÒÌ.03.08	(120-230)/(208-400)	0,2S/0,5	2	+	-08
SET -4ÒÌ.03.09		0,5S/1,0	2	+	-09
SET -4ÒÌ.03.10		0,2S/0,5	1	+	-10
SET -4ÒÌ.03.11		0,5S/1,0	1	+	-11
SET -4ÒÌ.03.12		0,2S/0,5	2	-	-12
SET -4ÒÌ.03.13		0,5S/1,0	2	-	-13
SET -4ÒÌ.03.14		0,2S/0,5	1	-	-14
SET -4ÒÌ.03.15		0,5S/1,0	1	-	-15