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   Multifunction meters

PSCH-4̉̀.05D

PURPOSE AND SCOPE OF APPLICATION
     Meters are designed for metering and accounting of active and reactive energy, maintaining of load power profile arrays with programmed integration time, power maximum holding, measurement of three-phase network parameters  and electric power quality parameters.
    Electric power meters may be used as commercial or technical electric power metering tool in production enterprises and electric power systems, provide power flow recording in electric power systems and interconnection tie flows.
    Electric power meters are designed for  self-contained operation or operation in the composition of automated information and measuring systems of electric power control and metering (AEPCM), automated dispatch control systems (ASCS).
Lineup of electric power meters includes the following:

  • bidirectional meters for accounting of active and reactive electric energy of direct and opposite direction (four accounting channels);
  • unidirectional meters for accounting of active electric energy only irrespective of current direction in each network phase (one accounting channel in module);
  • combined meters for accounting of active electric energy irrespective of current direction in each network phase (accounting in module) and reactive electric energy of direct and opposite direction (three accounting channels).

    Bidirectional and combined electric power meters may be configured (further configured) for operation in unidirectional mode (three accounting channels) and may meter:

  • active electric energy of direct and opposite direction as active energy of forward direction(module accounting);
  • reactive electric energy of first and third quadrant as reactive energy of forward direction (inductance load);
  • reactive electric energy of forth and second quadrant as reactive energy of reverse direction (capacitive load).

    Configured and unidirectional meters in case of operation in lines with energy flow in one direction prevent electric energy stealing attempts in the result of intentional incorrect connection, associated with current reversal in one or several current circuits of electric power meter.

REGULATORY GROUNDWORK
IEC 62052-11:2003

TECHNICAL FEATURES OF ELECTRIC POWER METER

  • Digital signal processing.
  • Two independent conductively-uncoupled communication interfaces with equal priority: RS-485 and optoport.
  • ModBus-like, SET-4̉̀.02-compatible communications protocol with ability of extended addressing.
  • Two configured isolated test outputs.
  • One configured digital input.
  • Improved  reliability indices. Absence of electrolytic capacitors.
  • Insensitivity to constant component in current circuit.
  • Built-in real-time timer.
  • Possibility of function, mode and parameter programming (reprogramming) process remote control, parameter and measuring data reading.
  • Access to electric power meter parameters and data for reading and programming from communication interface is protected by passwords.
  • Metrological coefficients and factory parameters are protected by hardware jumper  and inaccessible without seal opening.
  • Body – electric power meter version for installation onto DIN-rail (type ̉H accoding to GOST R MEC 60715-2003).

FUNCTIONAL CAPABILITIES OF ELECTRIC POWER METER
Tariffication and files of accounted electric energy
    Electric power meters provide tariff-free electric energy account with regard to active and reactive losses in power line and supply transformer.
Electric power meters maintain files of tariffed accounted energy, non-tariffed energy with  account of losses (active, reactive, of direct and reverse direction):

  • total of reset (accrued total);
  • per current  and preceding day;
  • beginning of current  and preceding day;
  • per current  month and twelve preceding months;
  • beginning of current month and twelve preceding months;
  • per current  and preceding year;
  • beginning of current and preceding year.

Rater:

  • four tariffs (̉1-̉4);
  • four types of a day (workdays, Saturday, Sunday, holiday);
  • twelve seasons (for each month of a year);
  • discrete of rate area is 10 minutes, interchange of rate area per day – to 144;
  • timetable of holidays and the list of deferred days are used.

Load power profiles
    Bidirectional electric power meters maintain two four-channel independent arrays of power profile (active, reactive electric energy, of direct and reverse direction), unidirectional electric power meters – one single channel array, combined electric power meters- one three-channel array.

  • Integration time from 1 to 60 minutes;
  • Depth of each array storage 113.7 days with integration time 30 minutes.

    Each power profile array for all mentioned above electric power meter models may be configured for maintaining of load power profile with account of active and reactive losses in electric power line and supply transformer with integration time from 1 to 30 minutes.

    Recording of load power maximums
    Electric power meters may be used as power maximum recorders (active, reactive electric energy, of direct and reverse direction) in each power profile array with application of twelve season timetable of morning and evening maximums.
Power maximums are recorded in electric power meter files:

  • from reset (on interface request and by maximum reset button);
  • per current and each of twelve preceding months.

    Value of power and time maximum, corresponding to power of corresponding profile array integration interval completion, is recorded in maximum files.
In case power profile array is configured for power with account of losses, maximum power with account of losses is recorded in maximum files.

Measurement of network parameters and electric energy quality indices
    Electric power meters measure instantaneous values (integration time 1 second) of physical quantities, characterizing three-phase electric network.

  • active, reactive and gross power;
  • active and reactive lost power;
  • phase voltage and voltage between phases;
  • current;
  • power factor;
  • network frequency;
  • current time and date;
  • temperature inside electric power meter body.

    Electric power meters of all versions irrespective of configuration operate as four-quadrant meters with account of phase displacement direction and angle between current and voltage in each network phase and may be used for evaluation of correct electric power meter connection.

Test outputs and digital inputs of electric power meter
Two isolated test outputs of main transfer device function in electric power meters.
Each test output may be configured for generating of the following:

  • telemetering pulses of one of energy accounting channels (active, reactive electric energy, of direct and reverse direction, including those with account of losses);
  • static indication signals of programmable yield threshold crossing (active, reactive electric energy, of direct and reverse direction);
  • supervisory control signals;
  • timer accuracy movement control signal (only channel 0 output).

    Single digital input functions in electric power meters and may be configured as:

  • calibration mode control input:
  • account input in  accrued total of pulses, arriving from external devices (at front edge, trailing edge or both edges);
  • remote indication input.

Logs
Meters maintain event logs, logs of electric energy quality indices, logs of yield threshold crossing and status log.

Electric power meter display device
Electric power meters have liquid-crystal display (LCD) for representation of accounted energy and measured values, three display mode control buttons.
    Electric power meters in mode of basic parameters display allow to display accounted active and reactive energy of direct and reverse direction:                                                                                                    

  • of accrued total (grand total from zero reset) according to current tariff;
  • of accrued total (grand total from zero reset)  according to each tariff and grand total of tariffs;
  • per current month and twelve preceding months according to each tariff and grand total of tariffs.

 Electric power meters in auxiliary parameter display mode allow to display measured instantaneous magnitudes of physical quantities, characterizing three-phase electric network.

Communication interfaces
Electric power meters allow to program, reprogram, control, read parameters and data via communication interfaces RS-485 and optical port.
Electric power meters may be operated via communication interfaces with application of software Configurator SET-4TM.

TECHNICAL SPECIFICATIONS OF ELECTRIC POWER METER

Value description

Value

Rated (maximum) current, À

5 (7.5)

Sensitivity current, mÀ

0.001Irated

Rated value of measured voltage (Urated), V

3x(57.7-115)/(100-200) or 3x(120-230)/(208-400)

Working range of measured voltages, V:
    Urated=3x(57.7-115)/(100-200)

    Urated=3x(120-230)/(208-400)

0.8Urated to 1.15Urated
3ơ(46-132)/(80-230)

3×(96-265)/(166-460)

Rated network frequency, Hz

50

Working range of network frequencies, Hz

 47.5 to 52.5

Accuracy class  of electric power meter at measurement in direct and reverse direction.

    of active energy

0.5 S

    of reactive energy

1.0

Margins of allowable basic relative measurement error, %:

    voltage (phase, between phases and their averaged value),  δu

±0.4
within the range from 0.8Urated to 1.15Urated

    current, δi

±0.4 under Irated≤I≤Imax.;

with 0.01Irated≤I≤Irated

    frequency and its averaged value

±0.05 within the range from 47.5 to 52.5 Hz

   active losses power, δĐï

(2δi + 2δu)

    reactive losses power, δQï

(2δi + 4δu)

Accuracy movement of built-in timer in normal conditions in on and off state, preferably, s/day

±0.5

Active (total) power, consumed by each  parallel voltage circuit, W (VA):
    Urated=3×(57.7-115)/(100-200) V
    Urated=3×(120-230)/(208-400) V

maximum 0.7 (1.1)
maximum 1.2 (2.3)

Gross power, consumed by each series circuit of electric power meter, V·À

maximum 0.1

Number of displayed bits of liquid-crystal display

8

Information exchange rate, bit/s:

    via optical port

9600

    via interface RS-485

38400, 28800, 19200, 9600, 4800, 2400, 1200, 600, 300

Transmission ratio in basic mode (À), calibration mode (V), pulse/(kW·h), pulse/(kvar·h) for  electric power meters under:

    Urated=3×(57.7-115)/(100-200) V

À=5000, V=160000

    Urated=3×(120-230)/(208-400) V

À=1250, V=40000

Data security in case of power supply interrupt, years:

    information

above 40

    internal hours

minimum 10 (lithium-type battery supply)

Information protection

Passwords of two access levels and hardware protection of metrological factor memory

Self-diagnostics

cyclic, continuous

Electric power meter operation conditions:

    ambient temperature, °Ñ

from minus 40 to plus 55

    relative humidity, %

to 90 under 30 °Ñ

    pressure, kPa (mm Hg)

 70 to106.7 (537 to 800)

Calibration interval, years

16

Electric power meter guarantee period, months

36

Mean time between failures, h

140000

Average electric power meter service life, years

30

Electric power meter weight, kg

0.8

Electric power meter dimensions, mm

171x113x66.5

ELECTRIC POWER METER VERSIONS

Electric power meter designation

Rated voltage, V

Energy metering

Electric power meter version

PSCH-4̉̀.05D.01

3×(57.7-115)/(100-200)

Bidirectional (four metering channels) of active and reactive electric energy ,of direct and reverse direction

 

PSCH-4̉̀.05D.05

3×(120-230)/(208-400)

-01

PSCH-4̉̀.05D.09

3×(57.7-115)/(100-200)

Unidirectional (one metering channel in module) of active and reactive electric energy irrespective of direction

-02

PSCH-4̉̀.05D.11

3×(120-230)/(208-400)

-03

PSCH-4̉̀.05D.13

3×(57.7-115)/(100-200)

Combined (three metering channels) of active energy irrespective of direction and of reactive electric energy of direct and reverse direction

-04

PSCH-4̉̀.05D.17

3×(120-230)/(208-400)

-05

Note – base model is electric power meter of SCH-4̉̀.05D.01 type.

 

New products

Time-schedule of workshops

Copyright

Copyright © 2012
Nizhny Novgorod Factory named after M.V. Frunze.
All rights reserved.
 
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