Product category:
Data acquisition Software and Communications
News Release from: LEM UK | Subject: Wi-LEM
Edited by the Engineeringtalk Editorial
Team on 10 November 2006
Local energy metering goes wireless
LEM launches the Wi-LEM (wireless local energy meter) family of components, an innovative solution that allows electricity consumption to be monitored and reduced.
LEM launches the Wi-LEM (wireless local energy meter) family of components, an innovative solution that allows electricity consumption to be monitored and reduced By using wireless communication, Wi-LEM greatly reduces the time, cost and disruption involved in deploying a submetering installation, increasing both the potential financial savings and removing many of the barriers to adopt this proven approach to reduce energy consumption
This article was originally published on Engineeringtalk on 3 Sep 2002 at 8.00am (UK)
Related stories
Easy installation for current transducers
LEM has new families of current transducers with an innovative design that dramatically reduces installation time.
Current transducers for milliamp accuracy
The DF series of current transducers provides accurate measurement of low DC currents from 10 to 500mA without breaking the primary cable.
There are three parts to the Wi-LEM family.
Energy meter nodes are assemblies of up to three current transducers with a signal processing module.
They can be deployed to measure energy consumption at any point in the power cabinet and transmit the data.
Mesh nodes are repeaters linking various nodes.
They enable wireless communications throughout a large installation.
The mesh gate is a gateway managing the mesh network.
It provides data through serial interface to a PC.
By measuring active, reactive and apparent energy plus maximum current and minimum voltage, energy meter nodes provide much more information than a simple submeter.
A variety of energy meter nodes - all of which have their accuracy certified to IEC62053 Active Energy Class 1 and Reactive Energy Class 3 - are available for 120 and 240V AC voltage and configured for nominal currents from 5 to 100A.
The compact sized, split-core transducers can easily be installed inside the limited free space of existing cabinets.
Energy meter nodes take measurements at 5 to 30min intervals and transmit the results over the 2.4GHz ISM band.
The technologies make installation and commissioning very easy.
Mesh nodes act as repeaters, and can be added to the network without any need for additional configuration or programming.
The mesh gate is a stand-alone wireless network management gateway that connects the transducer network with a PC using a serial interfaces RS232 or RS485 with a Modbus RTU protocol.
Each mesh gate allows monitoring of up to 240 energy meter nodes.
The 802.15.4 communication standard has a proven robustness in industrial and commercial environments.
Mesh gate and mesh nodes were developed in close co-operation by Millennial Net, leader in wireless sensor mesh network technology.
• LEM UK: contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
Search the Pro-Talk network of sites
