The device is an Extech 382100 3-Phase Power Analyzer/Datalogger. It is used for analyzing and recording electrical power system parameters. Key features include:
Full system analysis of up to 35 parameters.
Measures voltage (phase-to-phase and phase-to-ground) and current (phase-to-ground).
Calculates power parameters like VA, VAR, and PF.
Records up to 30,000 readings on an SD card.
Features a user-friendly, backlit LCD screen.
Includes 1200A current clamps.
Adjustable current transformer and potential transformer ratio for high power systems.