ENA-NXG is based on modular architecture, allowing combination of one CPU module and up to six selected input modules into one meter. The input modules are providing input signal isolation, filtering and A/D conversion, sending the data using digital backplane bus. The CPU module is equipped with FPGA receiving all digital input data, and the real-time controller running meter firmware and providing all interfaces and data storage.
Resulting meter functionality is based on the selected input module type and count, and on the meter firmware.
Power Quality (PQ)
The firmware calculates power quality parameters according EN50160 fully follows requirements described in IEC 61000-4-30 Class A and others (61000-4-7, 61000-4-15).
Main measurement functions are:
|ENA‑NXG‑CPU.A||CPU module based on NI-SOM (667 MHz dual-core, FPGA, real-time OS, NI LabVIEW) with 8-32 GB SD card,Ethernet, serial port, USB for data download and direct PC connection, 24 V DC power is required|
|ENA‑NXG‑CPU.B||ENA-NXG-CPU.A extended with integrated GPS receiver|
|ENA‑NXG‑CPU.C||ENA-NXG-CPU.A extended with fiber optic interface for ENA-TIR (ENA-TIR is external GPS receiver)|
|All analog input modules are providing 24 bit sigma-delta A/D conversion|
|ENA‑NXG‑HVI.A||4 channel high voltage input module, 300 V RMS range (measuring up to 600 V RMS), 6 kV isolation.|
Used for direct voltage measurement
|ENA‑NXG‑HVI.B||ENA-NXG-HVI.A with additional 4 low voltage input channels, 1 V RMS range, 2.5 kV isolation.|
Additional inputs are used for indirect current measurement using XX Amp / 0.33 V CTs.
This single module can cover one 3-phase system (4U, 4I)
|ENA‑NXG‑LVI.A||16 channel low voltage input module, 1 V RMS range|
2 channels can be switched to temperature measurement/PT1000.
Used for indirect current measurement (XX Amp / 0.33 V CTs)
|ENA‑NXG‑LVI.B||8 channel low voltage input module, 1 V RMS range|
Used for indirect current measurement
(XX Amp / 0.33 V CTs)
|ENA‑NXG‑HCI.A||4 channel current input module,|
1 A RMS range
Used for indirect current measurement (XX Amp / 1 A CTs)
|ENA‑NXG‑HCI.B||4 channel current input module,|
5 A RMS range
Used for indirect current measurement (XX Amp / 5 A CTs)
|ENA‑NXG‑DI||16 channel digital input module|