Portable cl.S PQA PLA404RGP
Power quality analysers is designed according to the norm IEC 61000-4-30 cl. S ed. 3 for continuous measurement of electrical parameters in LV and MV systems for further power quality investigation. The PLA404RGP 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. Portable PQA PLA404RGP 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.
- U and I accuracy 0.2
- sampling frequency 40 kHz
- 4 voltage and 4 current inputsv
- communication interfaces Ethernet, USB, RS485
- communication protocols Modbus RTU, Modbus TCP, SNTP, SMTP, FTP, HTTP, MTP, MQTT
- EN50160, PGC PQ logging
- measuring according IEC 61000-4-30 ed.3 cl. S
- harmonics, interharmonics EN 61000-4-7 up to 64th
- filcker measurement EN 61000-4-15
- suitable for PQ reports EN 50160, PGC
- transient detection > 25 μs
- events detection > 10 ms
- avg, max, min recorded value
- on board logging Flash memory 1GB
- WWW-server and email notification
- PMS SW for configuration, monitoring and evaluation
- small size rigid design
- MQTT support
- PQDIF export
Function
Current inputs
A part of delivery of PLA404RGP are also Rogowski coils 40 cm length. Digital integrator for current range change is integrated inside the portable power quality analyser PLA404RGP. Internal digital integraters offers following measuring ranges 10 A, 30 A, 100 A, 300 A, 1 kA, 3 kA, 10 kA.
As an optional accessory there are available also current clamps for measurement of low current up to 100A in accuracy class 0.3%.
IEC 61000-4-30 ed.3 cl. S
PQ analyzer PLA404RGP 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 uncertainity.
Events
Events are unexpected signal changes with duration from 10 ms up to days. In some instalations these events can cause material damages and economical losts. Norm EN 50160 defines limits of events and its quantity that can appear in electrical grid during a year. PQA PLA404RGP evaluates following type of events:
- DIP
- INT
- SWELL
- RVC
- I_MAX
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.
PLA404RGP 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).
Software
MQTT
integration of this protocol into PLA404RGP 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 transfered in file format JSON.
Measured values
| Parameter | L1 | L2 | L3 | L4 | L1-2 | L2-3 | L3-1 | ∑L1-L3 | Max | Min | Avg | Range | Display | Accuracy |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| phase voltage |  |
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10...600 V | 1 V...1 MV | 0.2% | ||||
| line-line voltage | |
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18...1000 V | 0...1 MV | 0.2% | |||||
| system frequency |
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40..70 Hz | 40...70 Hz | 10 mHz | |||||||
| current | |
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0.001...8.5 A | 1 mA...1 MA | 1% | ||||
| cosφ | |
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0.01L...0.01C | 0.01L...0.01C | 1% | ||||||
| power factor | |
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0.01L...0.01C | 0.01L...0.01C | 1% | |||||
| THDU L-N | |
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0...999% | 0...999% | 5% | ||||
| THDU L-L | |
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0...999% | 0...999% | 5% | |||||
| THDI | |
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0...999% | 0...999% | 5% | ||||
| U harmonicics | |
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0...999% | 0...999% | class 1 | |||||||
| group of U interharmonics | |
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0...999% | 0...999% | class 1 | |||||||
| group of U harmonics | |
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0...999% | 0...999% | class 1 | |||||||
| P harmonics | |
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0...999% | 0...999% | class 1 | |||||||
| Q harmonics | |
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0...999% | 0...999% | class 1 | |||||||
| I harmonics | |
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0...999% | 0...999% | class 1 | |||||||
| group of I interharmonics | |
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0...999% | 0...999% | class 1 | |||||||
| group of I harmonics | |
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0...999% | 0...999% | class 1 | |||||||
| short-term flicker | |
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0.4...10.0 | 0.4...10.0 | class A | ||||||
| long-term flicker | |
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0.4...10.0 | 0.4...10.0 | class A | ||||||
| under-voltage | |
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0...100% | 0...100% | 0.4% | |
| over-voltage | |
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0...100% | 0...100% | 0.4% | |
| asymmetry of voltage | |
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0...100% | 0...100% | 0.3% | ||||||||
| N wire voltage | |
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10...600 V | 0...1 MV | 0.2% | ||||||||
| K-factor | |
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| asymmetry of current | |
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0.5% | ||||||||||
| PQ transients | |
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25 μs | |||||||||
| PQ events | |
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10 ms | |||||||||
| ripple control | |
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| active power | |
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0...15.3 kW | 0...9999 GW | 1% | ||||
| reactive power |
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0...15.3 kvar | 0...9999 Gvar | 1% | ||||
| aparent power | |
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0...15.3 kVA | 0...9999 GVA | 1% | ||||
| distortion power | |
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1% | ||||||
| active energy +/- | |
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0...9999 GWh | 0...9999 GWh | class 1 | ||||||
| reactive L energy +/- | |
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0...9999 Gvarh | 0...9999 Gvarh | class 2 | ||||||
| reactive C energy +/- | |
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0...9999 Gvarh | 0...9999 Gvarh | class 2 |
Technical features
| Parameter | Value |
|---|---|
| auxiliary supply voltage |
85 ... 460 VAC/DC |
| self consumption |
< 5 VA |
| time uncertainity |
< 1 s a day |
| Převod napěťových a proudových traf | 1...750 000 |
| sampling rate |
40 kHz |
| event detection | > 10 ms |
| transient detection | > 25 μs |
| logger memory | 1 GB flash |
| communication interfaces | LAN / USB |
| communication protocol | Modbus TCP, SNTP, SMTP, HTTP, FTP, MTP, MQTT |
| ambient temperature | -25°C...+70°C |
| weight | 500 g |
| protection degree | IP54 |
| related standards | EN 61000-4-30 class S / EN 61000-4-7 / EN 61000-4-15 class A / EN 61557-12 |
