Industrial & Commercial Power Monitoring

Multifunctional Energy Meters

Knowing exactly how much energy each circuit, machine, or tenant consumes is the foundation of any real energy savings program. The LG 6400 and LG 6435 Multifunctional Energy Meters deliver Class 1 accuracy True RMS measurements, three-phase power parameters, THD monitoring, and RS485 Modbus communication in a compact panel-mount form factor — empowering energy managers, plant engineers, and facility operators to measure, monitor, and manage power usage with precision at every point in the system.

Precision Energy Visibility Across Every Circuit.

Class 1 True RMS Accuracy

Achieve IEC 62053-21 Class 1 measurement accuracy across all three phases simultaneously with 128 samples/cycle — reliable even with non-sinusoidal loads from VFDs and motors.

Motor Load Efficiency Monitoring

Track motor efficiency across five programmable slots with load hours logging for watts and current — identify underloaded motors and reduce energy waste at the machine level.

PLC, SCADA & DCS Integration

Optically isolated RS485 with Modbus RTU enables direct integration with PLCs, SCADA systems, DCS platforms, and RTUs with programmable address and parameter sequences.

THD & Harmonic Monitoring

Measure voltage and current THD percentage per phase and access individual phase energy via communication for granular load pattern analysis and motor performance assessment.

Built for Long-Term Industrial Use

IP51 ingress protection, CAT III rating, double insulation per IEC 61010-1, and a non-resettable over-voltage hour counter make the LG series ready for decades of reliable service.

A Multifunctional Energy Meter is a compact, panel-mount instrument that continuously measures and logs key electrical parameters across three-phase power systems, including:

Voltage (VLN, VLL, per phase) & Current (per phase + calculated neutral)
Active, Reactive & Apparent Power and Power Factor (True & Displacement)
kWh, kVAh, kVARh Import (and Export on LG 6435)
THD % for Voltage and Current (phase-wise)
Motor Load Efficiency (5 programmable slots) with Load Hours
CO₂ Emission, ON Hours & Power Interruptions

By placing LG meters at key measurement points, facility teams gain the load data they need to allocate energy costs, protect equipment, and drive measurable efficiency improvements.

Energy Management Systems (EMS):
Feed real-time energy data into EMS platforms for ISO 50001 and ENERGY STAR reporting at the circuit level.

Motor Control Centers (MCC):
Monitor motor load efficiency, detect current unbalance, and log overload conditions directly from the MCC panel.

HVAC & Building Automation:
Sub-meter chiller plants, AHUs, and pump stations with direct Modbus integration into BAS and BMS platforms.

Process Monitoring with PLC/SCADA:
Dynamic programmable communication supports large multi-drop Modbus networks with minimal configuration.

Commercial & Industrial Sub-Metering:
Compact DIN panel-mount form factor makes the LG series easy to retrofit into existing distribution boards for tenant billing or cost allocation.

Remote Electrical Panel Surveillance:
Read all panel parameters remotely via RS485 networks — eliminating on-site readings and reducing maintenance labor.

Our products are designed to support stringent measurement accuracy and reporting requirements:

Industry Measurement Standards:
Class 1 as per IEC 62053-21 – IEC/EN 61010-1 EDITION 3, CAT III, 300V LN / 600V LL, Protection Class II – UL Listed: UL E530665 | IEC/EN 62052-11

Sampling & Logging:
128 samples/cycle True RMS | 1-second update rate | 4-quadrant power & energy – Low starting current: 10mA onwards | Rated Voltage: 50–600V LL

Connectivity:
Modbus RTU over RS485, baud rates 4800–38400 bps, with 2000V AC isolation and dynamic programmable communication