AC Electric Power Monitoring and Measurement Sensors

AC Electric Power Monitoring and Measurement Sensors

AC Current Transformer Sensors - Retrofitting Existing Distribution NetworksRetrofitting Existing Distribution Networks

The current generation of electric power AC current sensors that are suitable for retrofitting existing distribution networks have obtained a level of accuracy capable of near revenue grade metering. These split-core sensor designs permit the installation of the AC current sensor without taking the primary conductor off-line. The standard solid-core AC current sensor used by electric power meters requires that the primary conductor be disconnected and threaded through the solid core current sensor for installation. The split-core design is simply clamped around the primary conductor and physically secured to the primary conductor.  

AC Current Transformer Sensors Most Widely Used

Split-Core Rogowski Coil Current Sensor - Retrofitting Existing Distribution NetworksThe technologies most widely used are the split-core AC current transformer sensors which incorporate advanced materials magnetic cores (e,g, silicon steel cold rolled grain oriented, Mn-Zn ferrite, …) and the Rogowski Coil current sensor “rope style split-core design. AC current transformer sensors offer excellent price/ performance. However, the AC primary current range and frequency response for each sensor design is relatively limited. The rigid physical design is not conducive to irregular primary conductor profiles (something other than a circular or rectangular profile).  

Benefits of Rogowski Coil AC Current Sensors

Rope style Rogowski Coil AC current sensors offer a very wide AC primary current range and frequency response. The flexibility of the “rope” style split-core design can be used for irregularly shaped primary conductor profiles. The Rogowski Coil current sensor does require additional electronics to perform the integration of the dv/ dt secondary output of the sensor.  

See Specs on the Following:

AC Current Transformer Sensors Rogowski Coil Current Sensors TC