LM-3431 Portable Analyzer / Recorder

Three Phase Portable Energy and Power Quality Analyzer / Recorder

IEC 61000-4-30 Class A certified
IEC 61000-4-15 Flicker certified
600VAC, three phase
1000VAC CAT IV compliant
kW, kVAR, kVA
Frequency and PF
Harmonics to the 50^th
Interharmonics, % THD
Dip and swell events
Years of non-volatile storage
Local communication via USB serial
Optional communication via LTE 4G cellular telemetry or Bluetooth 4.2
Analysis software included with SQL database support
IP67 weatherproof enclosure

The LM-3431 portable three phase PowerNode^TM analyzer / recorder is fully Class A compliant with the IEC 61000-4-30 power quality standards. Class A measurement methodology allows operators to easily identify and isolate power system problems and anomalies with confidence.

Intended to be installed outdoors or indoors, the LM-3431 is packaged in a rugged, compact polypropylene IP67 protective case with provisions for locking that can withstand temperatures from -30°C to +80°C.

Data is stored in both internal non-volatile flash memory and up to 32Gb of removable SD card memory. Standard USB or optional Bluetooth local serial communications allows easy pre-installation configuration setup or operational verification. The cellular LTE 4G telemetry option provides a convenient and cost-effective way to transport data to SQL-based cloud servers, reducing the number of on-site visits. Configuration changes and firmware updates can be accomplished either locally or over the air.

The LM-3431 provides 600 VAC, three phase monitoring with remote alarm exceedance notifications. Three voltage channels (Phases A,B,C) and four current channels (Phases A,B,C, Neutral) are sampled simultaneously at a rate of 128 samples per cycle at 60 Hz. Per IEC 61000-4-30 Class A specifications, the LM-3431 provides computational intervals of three seconds, 10 minutes and two hours in addition to many other interval durations.

Energy Measurements

The unit records more than 30 energy parameters including voltage, current, kW, kVAR, kVA, line frequency, true and displacement power factors for each leg and total, and both the single-cycle minimum and maximum values for each user defined averaging interval. Time stamps are Internet synchronized.

Power Quality

In addition to voltage and current magnitudes, dip and swell events, individual phase harmonics, interharmonics, and total harmonic distortion (THD%) are also captured. Enetics analytic software is included and can present data in both chart graph and report formats in Excel formats, eliminating software compatibility issues. Raw Excel data provides further flexibility for post processing and data analysis.

Flicker Measurements

The LM-3431 samples and calculates 1/2 cycle Vrms values and implements the prescribed digital filtering and processing per IEC 61000-4-30 standards to provide the requisite Pst and Plt perceptibility parameters for each phase of the line. These parameters provide a standardized, well adopted measure of flicker to assist in troubleshooting customer complaints.

Software

The LM-3431 software contains:

PowerScape^TM Software - Configuration and management of all recorders in the field; data is automatically retrieved remotely from designated sites via cellular data communication or locally via laptop serial USB connection or 32Gb SD memory card.
The SQL Database - User queries from within Excel are used to generate graphical and tabular data reports.
Excel Macros - Built-in user query dialogues for file-based data archives available from within Excel are used to generate graphical and tabular data reports. Charting and reporting routines including drag, zoom and panning features to simplify and enhance visual presentation of collected data.
The combination of a SQL database and Excel spreadsheet capabilities allows simple, well understood navigation of the data and provides simple data sharing among a wide rage of users.