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Power quality analyzer cl. A PLA44

Power quality analyzers is designed according to the norm IEC 61000-4-30 cl. A ed. 3 for continuous measurement of electrical parameters in LV and MV systems for further power quality investigation. The PLA44 is built with a powerful RISC processor that provides sufficient processing capabilities for real-time measurement and calculation of all parameters and values.

Continuous sampling of the voltage and current inputs at 40 kHz, guarantees the highest accuracy. The PLA44 is the instrument for power quality monitoring according to EN 50160 of the incoming energy supply side as well as on the consumer side in order to find and analyse the root cause of network problems.

PLA44
  • U and I accuracy 0.1
  • sampling frequency 40 kHz
  • communication interfaces Ethernet, USB, RS485
  • communication protocols Modbus RTU, Modbus TCP, SNTP, SMTP, FTP, HTTP, MTP, MQTT
  • RS485 Modbus gateway
  • 2 x digital I/O
  • 4 voltage and 4 current inputs
  • measuring according IEC 61000-4-30 ed.3 cl. A
  • harmonics, interharmonics EN 61000-4-7 up to 64th
  • flicker EN 61000-4-15
  • suitable for PQ reports EN 50160
  • transient detection > 25 μs
  • events detection > 10 ms
  • avg, max, min recorded value
  • external temperature sensor
  • on board logging Flash memory 1GB
  • WWW-server and email notification
  • panel mounting design 144x144mm
  • PMS SW for configuration, monitoring and evaluation
  • MQTT support
  • PQDIF export
  • EN50160, PGC PQ logging

Function

Voltage and current signals are digitalized by high class A/D converter and computing with RISC microprocessor. Effective values are computed continuously in 200 ms (10 periods) windows. Independently on this computing is for events detection each 10 ms counted effective value of U and I. Another absolutely independent part is transient detection that are directly detected from samples of digitalized U and I.

IEC 61000-4-30 ed.3 cl. A

PQ analyzer PLA44 measures according the standard IEC 61000-4-30 ed. 3 class A. Such type of analyzers are used in applications where there is necessary precise measurement for power quality evaluation according norms EN 50160, EN 61000-4-7 and EN 61000-4-15. If two devices of class A measures the same signal of voltage and current, measurement results at the same moment have to be  same with defined measurement uncertainty.

Events

Events are unexpected signal changes with duration from 10ms up to days. In some installations these events can cause material damages and economical lost. Norm EN 50160 defines limits of events and its quantity that can appear in electrical grid during a year. PQA PLA44 evaluates following type of events DIP, INT, SWELL, RVC and I_MAX.
 
+ Události

Transients

Voltage transients are short commutation, impulse or oscillatory events in electrical grid. Their source can be inductive load switching, power factor correction instruments, atmospheric events, protection instruments action or malfunction of switching elements in the grid.

PLA44 analyser detects two types of transients. Absolute transients and differential transients.

• Absolute transients are detected according to override of defined voltage level. The trigger for detection of the absolute transients is defined by absolute threshold (percentage of Udin).

• Differential transients are detected according to the difference between two consecutive voltage measurements. The difference between measurement is defined by differential threshold (percentage of Udin).

 
+ Tranzienty

WWW server

Device has embedded web server for remote monitoring of the PLA44 instrument over the Internet.
+ webserver PLA44
+ webserver PLA44
+ webserver PLA44

Software

Software PMS - Power Monitor System offers possibility for essential configuration of PLA44. More over it is a tool to define recording template, alarms, and defined events and transients limits for PQ evaluation. Another part of PMS SW is used for PQ evaluation and report generation.
+ PMS klient
+ PMS klient
+ PMS data evaluation

MQTT

integration of this protocol into power quality analyser PLA44 allows implementation of instrument into any SW. Measured data are divided into several topics in which user can chose which one want to receive. Measured data are transferred in file format JSON.

Measured parameters

parameter L1 L2 L3 L4 L1-2 L2-3 L3-1 ∑L1-L3 ∑L1-L4 Max Min Avg Range DisplayAccuracy
phase voltage tečka tečka tečka tečka           tečka tečka tečka 10...600 V 1 V...1 MV 0.1%
line-line voltage         tečka tečka tečka     tečka tečka tečka 18...1000 V 0...1 MV 0.1%
system frequency tečka                 tečka tečka tečka 40...70 Hz 40...70 Hz 10 mHz
current tečka tečka tečka tečka       tečka tečka tečka   tečka 0.001...8.5 A 1 mA...1 MA 0.1%
cosφ tečka tečka tečka tečka           tečka     0.01L...0.01C 0.01L...0.01C 1 %
power factor tečka tečka tečka tečka       tečka tečka tečka     0.01L...0.01C 0.01L...0.01C 1 %
THDU L-N tečka tečka tečka tečka           tečka tečka tečka 0...99.9% 0...999% 1 %
THDU L-L         tečka tečka tečka     tečka tečka tečka 0...99.9% 0...999% 1 %
THDI tečka tečka tečka tečka           tečka tečka tečka 0...99.9% 0...999% 1 %
U harmonicicstečka tečka tečka tečka                 0...99.9% 0...999% class 1
group of U interharmonics tečka tečka tečka tečka                 0...99.9% 0...999% class 1
group of U harmonics tečka tečka tečka tečka                 0...99.9% 0...999% class 1
P harmonics tečka tečka tečka tečka                 0...99.9% 0...999% class 1
Q harmonics tečka tečka tečka tečka                 0...99.9% 0...999% class 1
I harmonics tečka tečka tečka tečka                 0...99.9% 0...999% class 1
group of I interharmonics tečka tečka tečka tečka                 0...99.9% 0...999% class 1
group of I harmonics tečka tečka tečka tečka                 0...99.9% 0...999% class 1
short-term flicker tečka tečka tečka tečka           tečka tečka tečka 0.4...10.0 0.4...10.0 class A
long-term flicker tečka tečka tečka tečka           tečka tečka tečka 0.4...10.0 0.4...10.0 class A
under-voltage tečka tečka tečka tečka tečka tečka tečka     tečka tečka tečka 0...100% 0...100% 0.2%
over-voltage tečka tečka tečka tečka tečka tečka tečka     tečka tečka tečka 0...100% 0...100% 0.2%
asymmetry of voltage                   tečka tečka tečka 0...100% 0...100% 0.15%
N wire voltage                   tečka tečka tečka 10...600 V 0...1 MV 0.2%
K-factor tečka tečka tečka tečka                      
asymmetry of current                   tečka tečka tečka     0.5%
PQ transients tečka tečka tečka tečka                     25 μs
PQ events tečka tečka tečka tečka                     10 ms
ripple control tečka tečka tečka tečka tečka tečka tečka     tečka tečka tečka      
active power tečka tečka tečka tečka       tečka tečka tečka   tečka 0...15.3 kW 0...999 GW 0.2%
reactive power tečka tečka tečka tečka       tečka tečka tečka   tečka 0...15.3 kvar 0...999 Gvar 0.2%
aparent power tečka tečka tečka tečka       tečka tečka tečka   tečka 0...15.3 kVA 0...999 GVA 0.2%
distortion power tečka tečka tečka tečka       tečka tečka tečka   tečka     0.2%
active energy +/- tečka tečka tečka         tečka         0...999 GWh 0...999 GWh class 0.5S
reactive L energy +/- tečka tečka tečka         tečka         0...999 Gvarh 0...999 Gvarh class 1
reactive C energy +/- tečka tečka tečka         tečka         0...999 Gvarh 0...999 Gvarh class 1
temperature                   tečka tečka tečka     1°C

Technical features

Parameter Value
auxiliary supply voltage 85 ... 250 VAC/DC (±10%) or 24 ... 60 VAC/DC (±10%)
self consumption < 8 VA
time uncertinity < 1 s a day
number of I/O 2
VT and CT ratio 1...750 000
sampling rate 40 kHz
event detection > 10 ms
transient detection > 25 μs
logger memory 1 GB flash
display TFT VGA 5.6"
external temperature sensor NTC 10 kΩ / 25°C
communication interfaces RS485 / LAN / USB
communication protocols Modbus RTU, Modbus TCP, SNTP, SMTP, HTTP, FTP, MTP, MQTT
ambient temperature -25°C ... +70°C
dimensions 144 x 144 x 80 mm
weight 1350 g
protection degree IP20 rear side / IP54 front panel
related standards EN 61000-4-30 class A / EN 61000-4-7 / EN 61000-4-15 class A / EN 61557-12
Image

Contact

BMR trading - Hasal s.r.o.
Horní lán 1200/17
779 00 Olomouc
Czech Republic

+420 778 066 566

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