Electrocorder EC-7VAR-RS Three Phase Voltage, Current & Power Factor RecorderOverview The Electrocorder EC 7VAR RS is a portable three phase voltage, current, power factor and energy logger for industrial electrical analysis, fault finding, load surveys and energy audits. Use it when you need to understand how a three phase electrical system behaves over time, rather than relying on spot readings. The EC 7VAR RS records phase voltages and phase currents using three flexible Rogowski coils and four voltage leads for L1, L2, L3