Optimizing wireless performance of current metering and consumption control in commercial buildings

Typical commercial electrical meters are based on current transformers (CT) to supply real-time current sensing. The load circuits that are being monitored are inductively applied to the primary side of the current transformer and the secondary core winding is directly wired to the industrial power meter. These CT wires can be problematic and labour intensive. Potential exposure of wires, crimps, and screws poses safety concerns for some installations. In this paper we will address the short comings of traditional smart meters with the implementation and optimization of wireless current transformer metering to control power consumption in commercial buildings. The paper will explore the RF challenges and techniques that will be required to operate wireless CTs from enclosed electrical panels in commercial utility rooms and closets. The wireless CT will enable the generation of active, reactive and apparent power measurements for commercial, and industrial electrical power circuits over a full non-wired metering system (i.e. wireless to the panel).