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   Multifunction meters

PSCH-4.05K

DESIGNATION AND AREA OF APPLICATION

The meter is designed for measurement and accounting of active and reactive electric energy (also with consideration of losses), keeping of load power profile arrays with programmable integration time (also with consideration of losses), registration of power maximum values, measurement of three-phase mains parameters and electric power quality parameters.

The electric power meter can be used as a device for commercial or technical accounting of electric power at industrial facilities and in power grids, and also for accounting of power flows in grids and inter-system flows.

The electric power meter is designed for individual operation or as a part of automated informational and measurement electric power monitoring and accounting systems (AIMEPMAS), and in energy management systems (EMS).
The model range of electric power meters include:

  • bidirectional meters for accounting of active and reactive electric energy of forward and reverse direction (four accounting channels);
  • unidirectional meters for accounting of only active energy independently on current direction in each phase of a main (one accounting channel on module);
  • combined electric power meters for accounting of active power independently on current direction in each phase of a main (accounting on module) and of reactive electric energy of forward and reverse direction (three accounting channels).

Bidirectional and combined electric power meters can be configured and take into account:

  • active energy of forward and reverse direction as active energy of forward direction (accounting on the module);
  • reactive energy of first and third quadrant as reactive energy of forward direction (inductive load);
  • reactive energy of fourth and second quadrant as reactive energy of reverse direction (capacitive load).

Configured and unidirectional electric power meters when operated in lines with energy flow in one direction hinder attempts of electric energy stealing as a result of intended improper connection related to current flip in one or several meter current circuits.

ELECTRIC POWER METER TECHNICAL FEATURES

  • Two equally prioritized, independent, galvanically separated communication interfaces: RS-485 and optical port.
  • Additional interface modules: GSM, PLC, Ethernet, RF.
  • ModBus-similar, SET-4TM.02-compatible exchange protocol with the option of extended addressing.
  • Liquid crystal indicator with backlight.
  • Two configured insulated test outputs.
  • One configured digital input.
  • Generation of load control signal according to various programmable criteria.
  • A space is spared inside the body for communication equipment.

ELECTRIC POWER METER FUNCTIONAL CAPABILITIES

Billing and archives of accounted energy
The electric power meter keeps multi-tariff accounting of active and reactive energy of forward and reverse direction (depending of design variant and configuration).
Rater:

  • four tariffs (T1-T4);
  • four kinds of days (working days, Saturday, Sunday, holiday);
  • twelve seasons (per each month of a year);
  • tariff zone displacement is 10 minutes, alternation of tariff zones during a day is up to 144.
  • schedule of holidays and a list of rescheduled days are used.

The meter keeps archives of billed accounted electric energy and non-billed energy with account for losses (active, reactive with forward and reverse direction), and accounting of the number of pulses coming from external devices via the digital input:

  • total from a reset (progressive total);
  • over the current and previous days;
  • at the beginning of the current and previous days;
  • over every previous calendar day for the period of up to 30 days;
  • at the beginning of previous calendar day for the period of up to 30 days;
  • over the current month and twelve previous months;
  • at the beginning of the current month and twelve previous months;
  • over the current and previous years;
  • at the beginning of the current and previous years;

Meters can be configured for operation in single-tariff mode independently on established tariff schedule.

Load power profiles
Bidirectional electric power meters keep two independent power profile arrays (active, reactive and reverse direction); unidirectional and combined electric power meters keep one array (there are 2 profiles for all types):

  • integration time from 1 to 30 minutes (direct connection meters);
  • integration time from 1 to 60 minutes (transformer connection meters);
  • the period of storage for each array is 113 days at integration time of 30 minutes;
  • connection at rated voltage.

Each power profile array can be configured for keeping load power profile with account of active and reactive losses in power transmission line and in power transformer with integration time of 1 to 30 minutes.

Registration of load power peaks
The electric power meter can be used as recording device for power peaks (active, reactive, forward and reverse direction) for each power profile array using twelve-season schedule and evening peaks.
Power peaks are registered in electric power meter's archives:

  • interval peaks (between resets);
  • monthly peaks (over the current and every of twelve previous months).

Measurement of mains parameters and electric power quality indicators
The electric power meter measures momentary values (1 second integration time) of physical magnitudes characterizing three-phase electric main:

  • active, reactive and total power;
  • active and reactive power of losses;
  • phase and inter-phase voltage and positive sequence voltage;
  • current;
  • power coefficient;
  • mains frequency;
  • current time and date;
  • temperature inside the body;
  • zero sequence current;
  • coefficients of waveform distortions for phase and inter-phase voltages;
  • coefficients of voltage unbalance on zero and reverse sequences;
  • coefficients of current waveform distortions;
  • coefficients of current unbalance on zero and reverse sequences.

All variants of electric power meter design, independently on configuration, work as four-quadrant meters with account for direction and phase displacement angle between current and voltage in every phase of a main, and can be used for assessment of correct meter hook-up.
The meter can be used as electric power quality indicator meter according to parameters of steady-state phase (inter-phase, positive sequence) voltages and mains frequency.

Test outputs and digital inputs
The electric power meter has two isolated test outputs of the main transmitting device. Each test output can be configured to generate:

  • telemetry pulses in one of power accounting channel (active, reactive, forward and reverse direction, also taking into account losses);
  • static indication signals for excess of programmable power (active, reactive, forward and reverse direction) threshold;
  • remote control signals;
  • signal for controlling clock precision;
  • load control signal according to various programmable criteria.

The electric power meter has one insulated digital output that can be configured:

  • as calibration mode control input (only the first digital input);
  • as an input for counting of the number of pulses as progressive total coming from external devices (on front, rear edge or both edges);
  • as remote alarm input.

Electric power meter with load control function can operate in the following modes:

  • load power limitation;
  • energy limitation over a day;
  • energy limitation over the billing period (over a month, if the billing period begins on the first day of a month);
  • mains voltage control;
  • meter temperature control;
  • load control according to the schedule.

Logs
The meter keeps event logs, electric power quality indicator logs, power threshold excess log and status log.

Indication device
The meter has liquid crystal display (LCD) with backlight for displaying of accounted energy and measured values, and also three buttons for controlling indication modes.
The display of the electric power meter can operate in one of the following modes:

  • mode of current measurement displaying;
  • mode of basic parameters displaying;
  • mode of auxiliary parameters displaying;
  • mode of process parameters displaying.

The meter in basic parameters displaying mode allows displaying of accounted active and reactive electric power for each tariff and for the sum of tariffs.

 In addition, the meter allows to display:

  • measured momentary values of physical magnitudes mentioned in ‘Measurement of mains parameters and electric power quality indicators’;
  • electric power meter software (SW) version and test sum of metrologically essential part of the SW.

Communication interfaces

The electric power meter has two equally prioritized, independent, galvanically isolated communication interfaces: RS-485 and optical port.

The electric power meter provides the possibility of reading, via communication interfaces, archive data and measured function control parameters, programming and reprogramming of various parameters.

Additional interface modules cane built into the electric power meters for remote access to meter’s RS-485 interface via corresponding networks (GSM, PLC, Ethernet, RF). In this case, electric power meters become communicators, and other meters of a facility can be connected to their interface with no need for additional interface modules, forming a local network with a possibility of the remote access to each electric power meter at a facility.

ELECTRIC POWER METER TECHNICAL CHARACTERISTICS

Parameter

Value

Accuracy class when measuring in forward and reverse direction:
   active energy
   reactive energy



0.5 S or 1
1 or 2

Rated (maximum) current, A
Base (maximum) current, A

1 (2) or 5 (10)
5(100)

Starting current (sensitivity), mA:
   transformer connection
   direct connection


0.001Irated
0.004Ib

Rated voltages, V

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

Preset operating range of voltages, V, of electric power meters with Urated:
3(57.7-115)/(100-200) V
3(120-230)/(208-400) V


0.8Urated to 1.15Urated
3(46-132)/(80-230)
3(96-265)/(166-460)

Extreme operating range of phase voltages (in any two phases), V

0 to 440

Rated mains frequency, Hz

50

Operating frequency range, Hz

47.5 to 52.5

Limits of admissible fundamental relative measurement error, %:
   active power (forward and reverse direction
   at active, inductive and capacitive loads), δP,
   of electric power meters:
   transformer connection

 

0.5 at 0.05Irated≤ I ≤ Imax., cosφ=1
0.6 at 0.05Irated≤ I ≤ Imax., cosφ=0.5
1.0 at 0.01Irated≤ I ≤ 0.05Irated, cosφ=1
1.0 at 0.02Irated≤ I ≤ 0.05Irated, cosφ=0.5
1.0 at 0.05Irated≤ I ≤ Imax., cosφ=0.25

   direct connection

1.0 at 0.1Ib≤ I ≤ Imax., cosφ=1, cosφ=0.5
1.5 at 0.05Ib ≤ I < 0.1Ib, cosφ=1
1.5 at 0.1Ib≤ I ≤ Imax. cosφ=0.25

reactive power (forward and reverse direction at active, inductive and capacitance loads), δQ,of meters:
   transformer connection

1.0 at 0.05Irated≤ I ≤ Imax., sinφ=1, sinφ=0.5
1.5 at 0.01Irated≤ I ≤ 0.05Irated, sinφ=1
1.5 at 0.02Irated≤ I ≤ 0.05Irated, sinφ=0.5
1.5 at 0.05Irated≤ I ≤ Imax., sinφ=0.25

   direct connection

2.0 at 0.1Ib≤ I ≤ Imax., sinφ=1, sinφ=0.5
2.5 at 0.05Ib ≤ I < 0.1Ib, sinφ=1
2.5 at 0.1Ib≤ I ≤ Imax., sinφ=0.25

         full power, δs

δs = δQ (similarly to reactive power)

voltage (phase, inter-phase, positive sequence and their mean values), δU

0.4 in the range 0.8Urated to 1.15Urated
0.9 (electric power meters of direct connection)

   current, δI,  of electric power meters:
   transformer connection

0.4 at Irated ≤ I ≤ Imax.
 
at 0.01Irated ≤ I ≤ Irated

   direct connection

0.9 at Ib ≤ I ≤ Imax.
[0,9+0,05(I/Ix-1)]   at 0.05Ib ≤ I < Ib

   frequency and its averaged value

0.05 in the range of 47.5 to 52.5 Hz

   power of active losses, δPl

(2δi + 2δu)

   power of reactive losses, δQl

(2δi + 4δu)

active energy and power with account for losses (forward and reverse direction), δPPl

reactive energy and power with account for losses (forward and reverse direction), δQQl

Precision of built-in clock under normal conditions in on and off state, greater than, sec/day

0.5

Variation of clock precision within the range of operating temperatures, sec/ /day:
         in ON state within the range of temperatures of minus 40 to plus 60 , maximum
         in OFF state within the range of temperatures of minus 40 to plus 70 , maximum

 

0.1
0.22

Full power consumed by every serial circuit, maximum, VA

0.1

Active (full) power consumed by each parallel voltage circuit within voltage ranges from
57 V, to 115 V and from 120 V to 230 V, maximum, W (VA)

57.7 V

115 V

120 V

230 V

0.5 (0.8)

0.7 (1.1)

0.7 (1.1)

1.1 (1.9)

Maximum current consumed from a back-up AC or DC power supply source within the voltage range from 100 V to 265 V without (with) accounting for consumption by an additional interface module (6 V, 500 mA), mA

= 100 V

= 265 V

~100 V

~ 265 V

30 (90)

20 (40)

50 (120)

40 (70)

Liquid crystal indicator:
number of displayed digits
scale point of the low order when displaying energy and transformation coefficients equal to 1, kWh (kVArh)


8
0.01

Meter’s constant in basic mode (A) and calibration mode (B), pulse/(kWh), pulse/(kVArh) for electric power meters:

 

3(57.7-115)/(100-200) V, 1(2) A

=25000,  =800000

3(57.7-115)/(100-200) V, 5(10) A

=5000,  =160000

3(120-230)/(208-400) V, 1(2) A

=6250,  =200000

3(120-230)/(208-400) V, 5(10) A

=1250,  =40000

3(120-230)/(208-400) V, 5(100) A

=250,  =8000

Data safety at power interruptions, years:
         of data, minimum
         of internal clock, maximum


40
10 (power from lithium battery)

Data security

passwords for three levels of access and hardware protection of metrological coefficient memory

Self-diagnosis

Cyclic, continuous

Rated operating conditions:
ambient temperature, oC
relative humidity at 30 oC, %
pressure, kPa (mm of mercury)

group 4
- 40 to + 60
up to 90
70 to 106.7 (537 to 800)

Recalibration interval, years

12

Mean time between failures , hours

165000

Average lifetime, years

30

Recovery time, hours

2

Weight, kg, maximum

1,7

Overall dimensions, mm

30917092

OPTIONS OF ELECTRIC POWER METER DESIGN

Electric power meter coding

Rated voltage, V

Rated (maximum) current, A

Accuracy class for accounting of active/ reactive energy

Description and energy accounting

Availability of back-up power supply

Transformer connected electric power meters

PSCH-4TM.05MK.00
PSCH-4TM.05MK.01

 

3(57.7-115)/(100-200)

5(10)



0.5S/1

 

Bidirectional, four channels for accounting of active and reactive energy of forward and reverse direction

available

PSCH-4TM.05MK.02
PSCH-4TM.05MK.03

1(2)

none

PSCH-4TM.05MK.04

 

3(120-230)/(208-400)

5(10)

available

PSCH-4TM.05MK.05

5(10)

none

PSCH-4TM.05MK.06

1(2)

available

PSCH-4TM.05MK.07

1(2)

none

PSCH-4TM.05MK.08

3(57.7-115)/(100-200)

5(10)

 

0.5S/1

Unidirectional, one channel for accounting of active energy independently on the direction

available

PSCH-4TM.05MK.09

5(10)

none

PSCH-4TM.05MK.10

3(120-230)/(208-400)

5(10)

available

PSCH-4TM.05MK.11

5(10)

none

PSCH-4TM.05MK.12

 

3(57.7-115)/(100-200)

5(10)




0.5S/1

 

Combined, three channels for accounting independently on the direction and of reactive energy of forward and reverse direction

available

PSCH-4TM.05MK.13

5(10)

none

PSCH-4TM.05MK.14

1(2)

available

PSCH-4TM.05MK.15

1(2)

none

PSCH-4TM.05MK.16

 

3(120-230)/(208-400)

5(10)

available

PSCH-4TM.05MK.17

5(10)

none

PSCH-4TM.05MK.18

1(2)

available

PSCH-4TM.05MK.19

1(2)

none

Direct connection electric power meters

PSCH-4TM.05MK.20



3(120-230)/(208-400)

5(100)



1/2

Bidirectional

available

PSCH-4TM.05MK.21

5(100)

none

PSCH-4TM.05MK.22

5(100)

Unidirectional

available

PSCH-4TM.05MK.23

5(100)

none

PSCH-4TM.05MK.24

5(100)

Combined

available

PSCH-4TM.05MK.25

5(100)

none

Types of additional interface modules installed in the electric power meter.

Coding

Description

01

GSM communicator C-1.02.01

02

PLC modem M-2.01.01 (single phase)

03

PLC modem M-2.01.02 (three-phase)

04

GSM communicator C-1.03.01

05

Ethernet modem -3.01.ZZ

06

ISM modem -4.01.ZZ (430 MHz)

07

ISM modem -4.02.ZZ (860 MHz)

08

ISM modem -4.03.ZZ (2400 MHz)

09

Optical modem -5.01.ZZ

ZZ interface module design variant

 

New products

Time-schedule of workshops

Copyright

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