Energy reduction: Wireless sub-metering cuts use, costs

01/16/2007


System integration/control components/wireless

Wi-LEM family of sub-metering components from LEM S.A. is said to identify performance problems in processes and systems; determine opportunities for increasing efficiency; and allocate energy costs to specific processes.

Geneva, Switzerland, and Milwaukee, WI —Wi-LEM (wireless local energy meter) family of components from LEM S.A. is designed to monitor and reduce electricity consumption. Wireless communication enables a significant reduction of time, costs, and disruption involved in deploying sub-metering installations.

Wi-LEM is said to avoid many sub-metering barriers. Its small footprint simplifies installation; the compact split-core transducer can be placed easily into the limited free space typical in existing cabinets. The wireless automated monitoring network uses the ZigBee 802.15.4 standard. It allows a high number of nodes and works on an RF range of 2.4 GHz.

Product family includes:

  • Energy meter node : An assembly of 1 to 3 current transducers with a signal process module that can be used to measure consumption at any point in the power cabinet and can transmit data;

  • Mesh node : A repeater linking various nodes that enables wireless communication throughout a large installation; and

  • Mesh gate : A gateway that manages the mesh network and provides data through a serial interface to a PC.

Energy meter nodes measure active, reactive, and apparent energy and maximum current and minimum voltage with accuracy certified to IEC 62053 Active Energy Class 1 and Reactive Energy Class 3. They are available for 120 and 240 V ac and can be configured for nominal currents from 5 to 100 A. The nodes measure at 5 to 30 min. intervals and transmit results over the 2.4 GHz ISM band.

Mesh nodes can be added to the network without need for additional configuration or programming. The gate connects the transducer network with a PC using serial interfaces RS-232 or -485 with a Modbus RTU protocol. Each gate allows monitoring of up to 240 energy meter nodes. Mesh Gate and Mesh Nodes were developed in close cooperation with Millennial Net , a developer of wireless sensor mesh network technology. LEM S.A. manufactures isolated current and voltage measurement components.

Control Engineering Daily News Desk
Edited by Jeanine Katzel , senior editor





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Sensor-to-cloud interoperability; PID and digital control efficiency; Alarm management system design; Automotive industry advances
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
Engineering Leaders Under 40; System integration improving packaging operation; Process sensing; PID velocity; Cybersecurity and functional safety
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
click me