The CT-3A-RS is used mainly by facilities management, contractors, electrical/site services and maintenance engineers to monitor loading variations on site helping them to diagnose any load related issues. Also used for UPS sizing and monitoring and standby generator sizing and monitoring. Perfect for gathering data to make a case for splitting-up the loading or increasing feeder or transformer capacity. The CT-3A-RS uses traditional clamp-on current transformers (CT's) and has a maximum input of 400A per channel, making it accurate at lower currents, suitable for domestic and light commercial logging. The CTs fit around cables of diameter 30mm (1.2") or less.

The new Range Select button allows you to choose between two measurement ranges, 0.5A to 60A or 4A to 400A per phase. Designed to be accurate at current levels from 0.5A to 400A, to allow monitoring of light commercial, small industrial, farms and domestic/residential loads, actual kW ratings below depend on the system voltage.

For larger loads, we recommend the EC-3A-RS range which are designed for currents from 4A to 400A or 20A to 3kA per phase and larger cable diameters (up to 140mm, 14cm, 6inch). For an even higher current range between 400A and 3kA we recommend the EC-7VAR Power Logger.