HIOKI has entirely redesigned Model 3126 Phase Detector to create the new Model 3129.

In order to detect line phase, Model 3126 has to be connected by attaching clips directly to high-voltage electrified metallic objects in switchboards or connectors. Depending on the location, attaching the clips can be difficult and present safety hazards. In addition, reliable measurements may result if the metallic objects are not completely clean.

To resolve these issues, the new Model 3129 clips over the outside of conductors’ insulation, enabling safe and easy phase detection at any point along the conductors. Four LEDs light in sequence to clearly indicate phase relationships even in dark environments, and positive or reverse phases can be indicated both visually and by an audible beeper.

The clips attach to conductors of up to 17 mm diameter at voltages between 100 and 600 V. To avoid battery depletion worries in the event that the operator neglects to turn the detector off, an auto-power-off feature turns it off about 15 minutes after turn-on. Continuous operating time on two common AA batteries is as long as 70 hours