BMR

PLA33

BMR is a Czech company, inter alia, a manufacturer of equipment and electrical network surveillance system. The basic solution are multifunctional analyzers PLA33 series occurring in many variations. From the simplest offering only the display of the measured parameters (as a substitute for measures of analog), to advanced communication via RS485, internal memory, and programmable logic outputs.


Animacja PLA33

This device converts the digitally (every period of the sinusoid) parameters measured RMS current and voltage three-phase network, according to EN61000-4-30. At each cycle of the sine wave falls 128 samples used in the calculation. Every second of the analyzer measures 50 samples of currents and voltages, calculations are displayed and saved to the internal memory registers.
PLA33 type analyzer has 6 internal Electrical energy meters for energy consumed, produced - active, inductive, and capacitive. Each electricity meter can be configured as pulse output to other devices.
Interface RS485 communication with Modbus RTU protocol allows the connection type analyzers: PLA33C, PLA33CM, PLA33IC, PLA33ICM, PLA33DLC, PLA33DLCM to any Modbus master. The analyzer works with goals Ethernet'owymi Modbus RTU / Modbus TCP, so there is a possibility of reading devices by a number of peripheral devices at the same time, such as PLCs, HMI terminals, original software WMD (Power Monitor System), and any SCADA system.

To gain access to the server, open the following link:
PLA44
Enter the username "admin" and the password "1234".


Topologia modbus Ethernet dla PLA33

Optional internal memory is used to store the measured and calculated parameters of the power supply. record Memory defines the PC. The analyzer can store a sample in the period from 200 ms to 1 hour. The length of the possible recording depends on the amount of stored parameters. The solution can be used in places where flush current monitoring and recording systems recording is not possible. Saved parameters are downloaded via a link Modbus RTU.
Analyzer It has the ability to register the load profile. Records the value of all six of energy at a specific time to the memory. The period of record is defined between 1 to 60 minutes with a PC via the PMS software.

Device variantClock2x OutputsMax/minRS485RS485 insulationFlash Memory
PLA33LB
PLA33B•••
PLA33CB••••
PLA33CMB•••••
PLA33ICB••••
PLA33ICMB•••••
Table 1: Types of analyzers and their functions.

The analyzer has 2 programmable outputs that can be used as an alarm or pulse. Each output has the ability to defining three terms of logic (AND or OR). Optionally, the analyzer can be 24VDC power supply.

ParameterL1L2L3ΣL1-3MinMaxMeasuring rangeDisplay rangeAccuracy
Phase voltage, L - N•••••0 ... 300 V0 ... 180 kV±0,5 % MR
Interfacial voltage, L - L•••••0 ... 520 V0 ... 312 kV±0,5 % MR
Frequency••40 ... 70 Hz40 ... 70 Hz±0,2 % MV
Current••••0,01 ... 6 A0 ... 7,5 kA±0,5 % MR
Neutral current••-0 ... 7,5 kA±1,5 % MR
Power factor••0,01ind ... 0,01poj0,01ind ... 0,01poj±0,5 % MV
cosφ••••0,01ind ... 0,01poj0,01ind ... 0,01poj±0,5 % MV
THDu••••0 ... 999 %0 ... 999 %±1,0 % MR
THDi••••0 ... 999 %0 ... 999 %±1,0 % MR
Odd harmonics U••••0 ... 999 %0 ... 999 %±1,0 % MR
Odd harmonics I••••0 ... 999 %0 ... 999 %±1,0 % MR
Moc pozorna S••••0 ... 1,8 kVA0 ... 648 MVA±1,0 % MR
Moc czynna P••••0 ... 1,8 kW0 ... 648 MW±1,0 % MR
Moc bierna Q••••0 ... 1,8 kVAr0 ... 648 MVAr±1,0 % MR
Apparent power ΣS••0 ... 5,4 kVA0 ... 999 MVA±1,0 % MR
Active power ΣP••0 ... 5,4 kW0 ... 999 MW±1,0 % MR
Reactive power ΣQ••0 ... 5,4 kVAr0 ... 999 MVAr±1,0 % MR
Active energy•0 ... 9.999.999 kWh0 ... 9.999.999 kWhClass 1 *
Reactive energy L•0 ... 9.999.999 kVArh0 ... 9.999.999 kVArhClass 1 *
Reactive energy C•0 ... 9.999.999 kVArh0 ... 9.999.999 kVArhClass 1 *
Table 2: Measured parameters electricity network.

Supply voltage230VAC, lub 24VDC (+10%,-15%)
Frequency45 ... 65 Hz
Measuring voltage L-N0 ... 300 VAC
Measuring current0,01 ... 5,3 A
Accuracy measurement of U and I0,5%
Power consumption1,5 VA
Number of outputs2
Type of outputsNPN transistor
Maximum output load capability24 VDC / 100 mA
Available voltage transformer1 ... 1500
Current gear unit available1 ... 1500
Communication interfaceRS485
The communication protocolModbus RTU
Communication speed9600 ... 115 000 Bd
Internal memory512 MB Flash
Working ambient temperature-30°C ... +70°C
Front panel dimensions96 mm x 96 mm
Panel cutout dimensions91 mm x 91 mm
Site depth50 mm
Weight0,5 kg
Protection degreeIP20 back panel / IP54 front
Table 3: Specifications

PLA34

Analizator PLA34 The power quality analyser PLA34 is designed according to norm EN 61000-4-30 to fit the class S of power quality analyser. PLA34 is built on a 32 bit RISC processor that provides sufficient processing capabilities for real-time measurement and calculation of all parameters values.

Measuring method

Device digitizes voltage and current in 4 phases continually with sampling rate of 40 kHz. Measurement is synchronized by very precise internal clock with NTP synchronization strictly according EN 61000-4-30 class S norm. Measured and calculated values are stored in the internal flash memory for downloading by software for evaluation of power quality according to EN 50160 norm. Events and transients are available with detaile information on the device screen as well as on PC in monitoring software in web browser thanks to internal web-server.

Flicker

PLA34 measures short term and long term flicker strictly according to the standard EN 61000-4-15.

Harmonics measurement

PLA34 measures particular harmonics of U, I, P, Q up to 65th harmonics as well as group of harmonics and interharmonics of U and I in all 4 phases. THDU is measured for phase voltages and also for line voltages. THDI is measured for all 4 current inputs.

Display

PLA34 has clear LCD display to show most interesting parameters and let make the minimum important settings of the instrument. More measured parameters and advanced setting is available from software PMS.

Web server

Device has embedded web server for remote monitoring of the PLA34 instrument over the Internet.
To visit the real instrument web-server follow the link:
PLA44
Enter the username "admin" and password "1234" to access the instrument web server.

PLA34 web 1PLA34 web 2PLA34 web 3
ParameterL1L2L3L4L1-2L2-3L3-1ΣL1-3ΣL1-4MaxMinAVGMaxAVGMeasuringDisplayAccuracy
Phase voltage, L - N••••     •••• 10 ... 600 V 1 V ... 1 MV0,1%
Interfacial voltage, L - L    •••  •••• 18 ... 1000V 0 ... 1 MV0,1%
Frequency•        ••••40 ... 70 Hz40 ... 70 Hz10 mHz
Current••••     • ••0,001 ... 8,5A1 mA ... 1 MA0,2%
Cosφ••••     •   0,01L ... 0,01C0,01L ... 0,01C0,5%
Power factor••••   •••   0,01L ... 0,01C0,01L ... 0,01C0,5%
THDU L-N••••     ••••0 ... 999%0 ... 999%1%
THDU L-L    •••   ••••0 ... 999%0 ... 999%1%
THDI••••     ••••0 ... 999%0 ... 999%1%
Harmonics U••••     ••••0 ... 999%0 ... 999%Class 1
Group of interharm. U••••         0 ... 999%0 ... 999%Class 1
Group of harm. U••••         0 ... 999%0 ... 999%Class 1
Harmonics P••••         0 ... 999%0 ... 999%Class 1
Harmonics Q••••         0 ... 999%0 ... 999%Class 1
Harmonics I••••         0 ... 999%0 ... 999%Class 1
Group of interham. I••••         0 ... 999%0 ... 999%Class 1
Groupd of harm. I••••         0 ... 999%0 ... 999%Class 1
Short term flicker••••     •   0,4 ... 10,0 Pst0,4 ... 10,0 PstClass A
Long term flicker••••     •   0,4 ... 10,0 Plt0,4 ... 10,0 PltClass A
Undervoltage•••••••  ••••0 ... 100%0 ... 100%0,2%
Overvoltage•••••••  ••••0 ... 100%0 ... 100%0,2%
Unbalance U         ••••0 ... 100%0 ... 100%0,15%
N displacement         ••••10 ... 600 V0 ... 1 MV0,2%
K factor••••            
Unbalance I         ••••  0,5%
Transients••••           25 µs
Events••••           10 ms
Ripple control signal•••••••  ••••   
Active power ΣP••••   •   ••0 ... 15,3 kW0 ... 999 GW0,2%
Apparent power ΣS••••   •   ••0 ... 15,3 kvar0 ... 999 Gvar0,2%
Reactive power ΣQ••••   •   ••0 ... 15,3 kVA0 ... 999 GVA0,2%
Distortion power ΣSP••••   •   ••  0,2%
Active energy•••    •     0 ... 999 GWh0 ... 999 GWh0,2%
Reactive energy L•••    •     0 ... 999 Gvarh0 ... 999 Gvarh0,2%
Reactive energy C•••    •     0 ... 999 Gvarh0 ... 999 Gvarh0,2%
Table 4: Measured parameters electricity network.

Supply voltage230 VAC (+10%,-15%), 50/60 Hz
Power consumption2 VA
Measuring voltage L-N10 ... 600 V
Measuring voltage L-L18 ... 1000 V
Direct current measurement range1 mA ... 8,5 A (3P + N)
Available voltage transformer1 ... 750tyś
Current gear unit available1 ... 750tyś
Frequency40 ... 70 Hz
Measurement in networksfour-pole (3P+N)
Grid typeTN, TT, IT
Clock< 1 s na dzień
Sampling frequency40 kHz
Transients25 µs
Events trigger10 ms
DisplayVGA LCD
Memory1GB flash
Communication protocolModbus RTU, Modbus TCP, SNTP, HTTP, FTP
Communication interfaceRS485, USB, Ethernet
Dimensions96 x 96 x 70 mm
Weight1000 g
Related standardsIEC 61000-4-30 Class S, IEC 61000-4-7,
IEC 61000-4-15, IEC61557-12
Table 5: Specifications
Schemat conection( połączenia ) PLA34

Main features

  • 4 quadrant measurement
  • EN 61000-4-30 Class S
  • 4 current inputs, 3 voltage inputs
  • Harmonics and inter-harmonics to EN 61000-4-7
  • Flicker measurement (jitter) EN 61000-4-15
  • Sampling frequency 40Hz
  • RS485, Ethernet, USB
  • Web Server

PLA44

Analizator PLA44 The power quality analyzer PLA44 is designed according to norm EN 61000-4-30 class A for measurement of electrical parameters in LV and MV systems. PLA44 is built on a 32 bit RISC processor that provides sufficient processing capabilities for real-time measurement and calculation of all parameters values.

Device description

Device digitizes voltage and current in 4 phases continually with sampling rate of 40 kHz. Measurement is synchronized by very precise internal clock with NTP synchronization strictly according EN 61000-4-30 class A norm. Measured and calculated values are stored in the internal flash memory for downloading by software for evaluation of power quality according to EN 50160 norm. Events and transients are available with detail information on the device screen as well as on PC or web browser thanks to build-in web-server.

Flicker

Short term and long term flicker is calculated statistically and strictly according to the norm EN 61000-4-15 and it meets the class A.

Harmonics measurement

PLA44 measures particular harmonics of U, I, P, Q up to 65th harmonics as well as group of harmonics and inter-harmonics of U and I in all 4 phases. THDU is measured for phase voltages and also for line voltages. THDI is measured for all 4 current inputs.

Display

Full graphic TFT display with VGA (800 x 600 px) resolution

PLA44 Strona 1 NumericPLA44 Strona 2 HarmonicsPLA44 Strona 3 Transients

Web server

Device has embedded web server for remote monitoring of the PLA44 instrument over the Internet. To visit the real instrument web-server follow the link:
PLA44
Enter the user-name "admin" and password "1234" to access the instrument web server.

ParameterL1L2L3L4L1-2L2-3L3-1ΣL1-3ΣL1-4MaxMinAVGMaxAVGMeasuringDisplayAccuracy
Phase voltage, L-N••••     ••••10 ... 600 V 1 V ... 1 MV0,1%
Interfacial voltage, L-L    •••  ••••18 ... 1000V 0 ... 1 MV0,1%
Frequency•        ••••40 ... 70 Hz40 ... 70 Hz10 mHz
Current••••   ••• ••0,001 ... 8,5A1 mA ... 1 MA0,2%
Cosφ••••     •   0,01L ... 0,01C0,01L ... 0,01C0,5%
Power factor••••   •••   0,01L ... 0,01C0,01L ... 0,01C0,5%
THDU L-N••••     ••••0 ... 999%0 ... 999%1%
THDU L-L    •••   ••••0 ... 999%0 ... 999%1%
THDI••••     ••••0 ... 999%0 ... 999%1%
Harmonics U••••     ••••0 ... 999%0 ... 999%Class 1
Group of interharm. U••••         0 ... 999%0 ... 999%Class 1
Group of harm. U••••         0 ... 999%0 ... 999%Class 1
Harmonics P••••         0 ... 999%0 ... 999%Class 1
Harmonics Q••••         0 ... 999%0 ... 999%Class 1
Harmonics I••••         0 ... 999%0 ... 999%Class 1
Group of interham.I••••         0 ... 999%0 ... 999%Class 1
Groupd of harm. I••••         0 ... 999%0 ... 999%Class 1
Short term flicker••••     •   0,4 ... 10,0 Pst0,4 ... 10,0 PstClass A
Long term flicker••••     •   0,4 ... 10,0 Plt0,4 ... 10,0 PltClass A
Undervoltage•••••••  ••••0 ... 100%0 ... 100%0,2%
Overvoltage•••••••  ••••0 ... 100%0 ... 100%0,2%
Unbalance U         ••••0 ... 100%0 ... 100%0,15%
N displacement         ••••10 ... 600 V0 ... 1 MV0,2%
K factor••••            
Unbalance I         ••••  0,5%
Transients••••           25 µs
Events••••           10 ms
Ripple control signal•••••••  ••••   
Active power ΣP••••   ••• ••0 ... 15,3 kW0 ... 9999 GW0,2%
Apparent power ΣS••••   ••• ••0 ... 15,3 kVA0 ... 9999 GVA0,2%
Reactive power ΣQ••••   ••• ••0 ... 15,3 kvar0 ... 9999 Gvar0,2%
Active energy•••    •     0 ... 9999 GWh0 ... 9999 GWh0,2%
Reactive energy L•••    •     0 ... 9999 Gvarh0 ... 9999 Gvarh0,2%
Reactive energy C•••    •     0 ... 9999 Gvarh0 ... 9999 Gvarh0,2%
Temperature         ••••  1°C
Table 6: Measured parameters electricity network.

Supply voltage230 VAC (+10%,-15%)
Power consumption5 VA
Measuring voltage L-N10 ... 600 VAC
Measuring voltage L-L18 ... 1000 VAC
Measuring current (without CT)1 mA ... 8,5 A
Frequency40 ... 70 Hz
Clock accuracy< 1 s per day
Number of output/input2 (+ expansions module)
Voltage and current CT1 ... 750 000
Sampling rate40 kHz
Events trigger10 ms
Transients trigger25 µs
Data memory1 GB flash
DisplayTFT VGA 5,6"
Temperature inputNTC 10kΩ / 25°C
Communication interfaceRS485, LAN, USB
Communication protocolModbus RTU, Modbus TCP, SNTP, HTTP, FTP
Working ambient temperature-25°C ... +70°C
Dimensions144 x 144 mm
Weight1350 g
Protection degreeIP20 back panel / IP54 front panel
Related standardsIEC 61000-4-30 class A, IEC 61000-4-7,
IEC 61000-4-15, IEC61557-12
Table 7: Specifications
PLA44 Connection

Main features

  • 4 quadrant measurement
  • EN 61000-4-30 Class A
  • 4 current inputs, 4 voltage inputs
  • Harmonics and inter-harmonics to EN 61000-4-7
  • Flicker measurement (jitter) EN 61000-4-15
  • Sampling frequency 40Hz
  • RS485, Ethernet, USB

Modules (contactors) thyristor capacitor - type of CTU

Since 2008 our company is main importer of CTU thyristor switching modules, produced by Czech company BMR.

BMRXCTU34001024Thyristor switching module 10/18kVar/400VAC (15A) for capacitive load switching, control voltage 24VDC
BMRXCTU34003024Thyristor switching module 30/51kVar/400VAC (42A) for capacitive load switching, control voltage 24VDC
BMRXCTU34005024Thyristor switching module 50/90kVar/400VAC (75A) for capacitive load switching, control voltage 24VDC

Thyristor switching modules CTU03 and CTU33 are designed for dynamic and hybrid PFC based on three-phase capacitors. CTU03 modules have special semiconductor switcher in each phase. Together with controllers FCR and GCR range they can reach the best possible speed of reconnection up to 25 operations per 1 second. Special construction of the module solves voltage discharging problem so the three-phase capacitor can be switched again immediately after disconnection without prior discharging. Switching is realized within 10 ms from receiving the signal from PF controller.

Chart showing the moment of switching voltage module CTU.

Thyristor switching modules CTU are constructed for switching of LC circuits with prevailing capacitive part (detuned compensation stages). Advantage of CTU modules comparing to the classic contactor switching of capacitor stages is immediate capacitor connection without its previous discharging. This is possible thanks to special construction which assures that capacitor is ready for another connection immediately after its previous disconnection. Switching of capacitor is realized at the moment when the difference between the capacitor voltage and system voltage before the switching element is equal to zero. From this feature comes another important advantage and this is significant current surges reduction. Current surges are causing disturbances which can affect proper running of electronic devices and can severely damage and even destroy them. Further more, lifetime of capacitors is increased, because only nominal current flows through the circuit. For the protection of power switching element against current peaks (di/dt) it is necessary to connect in the series with module also inrush inductor.

Temperature protection

Inside the CTU03 and CTU33 module aluminum cooler is installed temperature sensor which is used for protection of semiconductors against damage by high temperature. Temperature level is set on 80°C.

Forced ventilation

CTU03-400-50 and CTU03-400-72 have a ventilator for forced ventilation of aluminum coller. The same for variant CTU33. Ventilator is started automatically when temperature of cooler rise over the defined level.

Thyristor switching module BKCTU34005024 (75Amper)
Thyristor switching module BMRXCTU34005024 (75A)