PLA34DL power quality analyzer cl. S
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 PLA34DL is built with a powerful RISC processor that provides sufficient processing capabilities for real-time measurement and calculation of all parameters and values.
- sampling frequency 40 kHz
- U and I accuracy 0.2
- 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
- 3 voltage and 3 current inputs
- measuring according IEC 61000-4-30 ed.3 cl. S
- harmonics, interharmonics EN 61000-4-7 up to 64th
- filcker measurement according EN 61000-4-15
- suitable for PQ reports EN 50160
- transient detection > 25 μs
- events detection > 10 ms
- avg, max, min recorded value
- EN50160, PGC PQ logging
- on board logging Flash memory 1GB
- WWW-server and email notification
- DIN rail mounting design
- PMS SW for configuration, monitoring and evaluation
- universal auxiliary supply voltage
- PQDIF export
- MQTT support
Function
IEC 61000-4-30 ed.3 cl. S
PQ analyzer PLA34DL measures according the standard IEC 61000-4-30 ed. 3 class S. 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.
Events
Events are unexpected signal changes with duration from 10ms 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 PLA34DL evaluates following type of events DIP, INT, SWELL, RVC and I_MAX.
Transients
Software
MQTT
integration of this protocol into PLA34DL 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 parameters
| Parameter | L1 | L2 | L3 | 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 | 0.2% | ||||
| 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 harmonics | |
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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 hrmonics | |
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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% | |||||||||
| transients | |
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25 μs | |||||||||
| 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 | 0.4% | ||||
| reactive power | |
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0...15.3 kvar | 0...9999 Gvar | 0.4% | ||||
| apparent power | |
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0...15.3 kVA | 0...9999 GVA | 0.4% | ||||
| distortion power | |
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0.5% | ||||||
| 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 |
|---|---|
| supply voltage | 85 ... 250 VAC/DC (±10%) or 24 ... 60 VAC/DC (±10%) |
| self consumption | < 5 VA |
| time uncertainity | < 1 s a day |
| number of I/O | 2 |
| VT and CT ratio | 1...750 000 |
| sampling frequency | 40 kHz |
| event detection | > 10 ms |
| transient detection |
> 25 μs |
| logger memory | 1 GB flash |
| display | LCD |
| communication interface | RS485 / LAN / USB |
| communication protocols | Modbus RTU, Modbus TCP, SNTP, SMTP, HTTP, FTP, MTP, MQTT |
| ambient temperature | -25°C...+70°C |
| dimensions | 6 modules |
| weight | 300 g |
| protection degree | IP20 |
| related standards | EN 61000-4-30 class A / EN 61000-4-7 / EN 61000-4-15 class A / EN 61557-12 |
