PSCH-4ÒÌ.05

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 in three - and four-wire power circuits of alternating current, in case of current and voltage transformer connection.

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

    The model range consists of:

• two-directional meters intended for accounting of active and reactive electrical energy of the forward and reverse direction (4 metering channels);
• unidirectional meters intended only for accounting of active electrical energy without regard to current direction in every phase of the network (one channel of metering in magnitude);
• combined meters intended for accounting of active energy without regard to current direction in every phase of the network (metering in magnitude) and for accounting of reactive energy of the forward and reverse direction (3 metering channels).

    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.
• Two independent communication interfaces which are of equal priority and galvanically separated: RS-485 interface and optoport.
• Nonvolatile memory.
• Built-in real-time clock.
• ModBus-similar, SET-4ÒÌ.02 –compatible exchange protocol.
• Four galvanically separated configurable pulse outputs.
• Possibility of configuration to measure active energy in one direction without regard to current direction in every phase of the network (metering in magnitude).
• Current transformer connection and voltage transformer or direct voltage connection are possible.

FUNCTIONAL CAPABILITIES

    The meters ensure multitariff accounting of energy in four tariff zones, as per four day types in twelve seasons. 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 meters ensure tariffless accounting of active energy losses in the power line.

    The meters keep records of the measured active energy of the forward and reverse direction with the possibility to indicate them on the display and to read them through the communication interfaces: in total from the date of meter resetting; for the current and preceding years; as at the beginning of the current and preceding years; for the current month and for each of preceding 11 months; as at the beginning of the current and each of preceding 11 months; for the current and preceding day; as at the beginning of the current and preceding day.

    Two-directional meters can be configured to operate in unidirectional multitariff mode (3 metering channels) and register:

• active energy of the forward and reverse direction as active energy of the forward direction (metering in magnitude);
• reactive energy of the first and third quadrant as reactive energy of the forward direction (inductive load);
• reactive energy of the fourth and second quadrant as reactive energy of the reverse direction  (capacity load).

    Combined meters can be configured for accounting of reactive energy in one direction and register:

• active energy of the forward and reverse direction as active energy of the forward direction (metering in magnitude);
• reactive energy of the first and third quadrant as reactive energy of the forward direction (inductive load);
• reactive energy of the fourth and second quadrant as reactive energy of the reverse direction  (capacity load).

    Two-directional meters keep two independent power profile arrays with programmable integration time from 1 to 60 minutes. Unidirectional and combined meters keep one power profile array  with programmable integration time from 1 to 60 minutes. Storing depth of each profile array with integration time of 30 minutes is 56 days.

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

    The electricity meters can be used as four-quadrant meters or sensors (taking into account direction and angle of phase displacement between current and voltage in every phase of the network) of instantaneous values of physical quantities, characterizing three-phase power network:

• active, reactive, total power and active power losses (in each phase and in sum of phases);
• phase voltages;
• line currents;
• power factor (in each phase and in sum of phases);
• network frequency.

    The meters can be used as power-quality meters under parameters of steady-state deviation of phase voltages 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 communication interfaces or optical port.

TECHNICAL DATA

Quantity	Value
Nominal voltage, V	3õ57,7/100, 3õ(120-230)/(208-400)
Nominal (maximum) current, À	1 (1,5) or 5 (7,5)
Sensitivity current, mÀ	0,001Inom
Working voltage range	from 0,8Unom to 1,15Unom
Network frequency, Hz	50±2,5
Accuracy class when measuring:
active energy	0,5S
reactive energy	1
Maximum permissible main error when measuring, %:
phase voltage and its average value	±0,4 in the range from 0,8Unom 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 to 52,5 Hz
active energy and power losses in the power line	2δi for power in one line √3• 2δi for energy and power in three lines
Accuracy movement of built-in clock at normal conditions, better than, sec/day	±0,5
Change of accuracy movement in the working temperature range, sec/°Ñ /day:
when the meter is on in the temperature range from -40 to +60 °Ñ	less ± 0,1
when the meter is off in the temperature range from -10 tî +60 °Ñ	less ± 0,15
when the meter is off in the temperature range from -40 tî -10 °Ñ	less ± 0,22
Active (total) power consumed by each parallel voltage circuit, W (VA)
Unom=3õ57,7/100V	not more than 0,2 (0,4)
Unom=3õ(120-230)/(208-400)	not more than 0,5 (1,5)
Total power consumed by each serial circuit, VÀ	not more than 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
through optical port	9600
via RS-485 interface	9600, 4800, 2400, 1200 600, 300
Range of  the meter constant values pulses/(kwh), pulses/(kvarh):	from 1250 tî 800000
Data protection	Two access levels and  memory hardware protection of metrological  factors
Self-diagnostics	Iterative, incessant
Working and service conditions:
ambient air temperature, °Ñ	up to 90 at 30°Ñ
pressure, kPa (mm of mercury)	from 70 tî 106,7 (from 537 tî 800)
Recalibration interval, years	10
Guaranteed service life, months	36
Average error-free running time, h	90000
Average service life, years	30
Mass, kg	1,75
Measurements, mm	330õ170õ80,2

MODIFICATIONS

PSCH-4ÒÌ.05 modifications	Nominal voltage, V	Nominal current, À	Metering energy	Availability of an alternate power unit	Variant
PSCH-4ÒÌ.05	57,7/100	5(7,5)	two-directional meters intended for accounting of active and reactive electrical energy of the forward and reverse direction (4 metering channels)	+
PSCH-4ÒÌ.05.01		5(7,5)		-	-01
PSCH-4ÒÌ.05.02		1(1,5)		+	-02
PSCH-4ÒÌ.05.03		1(1,5)		-	-03
PSCH-4ÒÌ.05.04	(120-230)/(208-400)	5(7,5)		+	-04
PSCH-4ÒÌ.05.05		5(7,5)		-	-05
PSCH-4ÒÌ.05.06		1(1,5)		+	-06
PSCH-4ÒÌ.05.07		1(1,5)		-	-07
PSCH-4ÒÌ.05.08	57,7/100	5(7,5)	unidirectional meters intended only for accounting of active electrical energy without regard to current direction in every phase of the network (one channel of metering in magnitude)	+	-08
PSCH-4ÒÌ.05.09		5(7,5)		-	-09
PSCH-4ÒÌ.05.10	(120-230)/(208-400)	5(7,5)		+	-10
PSCH-4ÒÌ.05.11		5(7,5)		-	-11
PSCH-4ÒÌ.05.12	57,7/100	5(7,5)	combined meters intended for accounting of active energy without regard to current direction in every phase of the network (metering in magnitude) and for accounting of reactive energy of the forward and reverse direction (3 metering channels)	+	-12
PSCH-4ÒÌ.05.13		5(7,5)		-	-13
PSCH-4ÒÌ.05.14		1(1,5)		+	-14
PSCH-4ÒÌ.05.15		1(1,5)		-	-15
PSCH-4ÒÌ.05.16	(120-230)/(208-400)	5(7,5)		+	-16
PSCH-4ÒÌ.05.17		5(7,5)		-	-17
PSCH-4ÒÌ.05.18		1(1,5)		+	-18
PSCH-4ÒÌ.05.19		1(1,5)		-	-19