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Wireless sub-metering components

LEM has expanded its Wi-LEM (Wireless Local Energy Meter) family with the addition of the Wi-Pulse and Wi-Zone to allow the remote measurement and monitoring of electricity, water, temperature and humidity. The devices allow industrial and commercial enterprises to break down energy and water usage, and identify the areas of efficiency improvement. By using the 802.15.4 wireless communication standard and split-core transducers, both the devices reduce the time, cost and disruption involved in deploying a sub-metering installation. The Wi-LEM components feature RF power of 10mW. The Wi-Pulse is a dual-input pulse counter that counts and transmits pulses generated by utility meters. It can be connected to an existing Wi-LEM network. It enables readings from the existing stand-alone water and energy utility meters, and sub-meters with a pulse output to be monitored centrally using a Wi-LEM network. The Wi-Zone is a temperature and humidity transducer that connects to a Wi-LEM network and allows environmental conditions to be monitored. Both devices are battery powered and simplify installation as they require no external power supply.

The Wi-LEM family of EMNs (energy meter nodes) has also been enhanced to offer measurements of high currents of up to 2000ARMS. The EMNs measure active, reactive and apparent energy plus maximum current and minimum voltage. The EMNs comprise an assembly of one to three current transducers with an integral signal-processing module. They can be deployed to measure energy consumption at any point in a power cabinet and transmit the data. High-accuracy and compact size is provided by the use of split-core Rogowski coils, which simplify installation. All three units work with the company’s Mesh Node and mesh gate to ensure compatibility with existing solutions. The Mesh Node is a repeater that links various nodes to provide reliable wireless communication in larger installations. It can be added to the network without the need for additional configuration or programming. The Mesh Gate is a stand-alone wireless network management gateway that connects the robust self-configuring mesh network of transducers with a PC. Each Mesh Gate allows the monitoring of up to 200 EMNs and features an internal integrated antenna.