Electrocorder EC-3A-RS Three Phase Current Recorder (400A/3kA)Overview The Electrocorder EC 3A RS is a portable three phase current logger for high current load surveys, feeder monitoring, energy audits and industrial current investigations. Use it when you need to record three phase current over time, especially on larger industrial or commercial loads where a conventional clamp logger may not have enough current range. The EC 3A RS uses three flexible Rogowski coils that fit around conductors up to 140 mm