HIOKI PD3259-50 Digital Phase Detector | Non-contact phase sequence and three-phase voltage AC 90–520 V, diameter φ6mm to 30mm, CAT IV 600 V, optional Z3210 Bluetooth

HIOKI (Japan) PD3259-50 Non-Contact Phase Detector: Simultaneous Three-Phase Voltage Measurement, Live-Line Testing Through Insulation

Overview

In high-voltage panel maintenance, new three-phase motor installations and plant electrical inspections, conventional measurement with bare metal probes is cumbersome and carries serious risks of arc short circuits and electric shock. The genuine authorized HIOKI (Japan) product PD3259-50 digital non-contact phase detector is designed for safe field electrical diagnosis without shock risk.

It uses non-contact metal sensing: without stripping insulation or touching exposed metal terminals, simply clamp the three voltage clips onto the insulated wires (insulated wire outer diameter φ6mm to 30mm; shielded wires not supported) to obtain phase sequence judgment (positive/reverse phase) and a numeric display of three-phase line voltages (AC 90.0 V to 520.0 V) in approx. 3 seconds. With the Z3210 Bluetooth wireless adapter (optional), data can be written automatically into Excel in real time or linked to the App, making it a field instrument for electricians, safety personnel and plant maintenance teams.

Key Technical Specifications

Non-Contact Metal Sensing with Dual Data Display

• Measurement by clamping on insulation: Measures by clamping on the outer insulation of the wire, without contacting the metal conductor.
• Simultaneous display of phase sequence and three-phase line voltages: The LCD shows the three-phase voltage values (RS, ST, TR line voltages) together with the arrow phase sequence indication, so there is no need to switch between a voltmeter and a phase rotation meter.
• Audible and visual indication: LED and buzzer indicate the phase sequence result.

Bluetooth Data Management and Protection

• Z3210 Bluetooth wireless expansion (optional): Supports automatic entry of data into Excel sheets (Excel Direct Input), eliminating manual transcription and typing in the field and the associated recording errors.
• GENNECT Cross app: Phase sequence and three-phase voltage data can be tagged directly onto floor plans or photos of distribution panels taken on site, and a PDF report produced.
• Safety and protection: CAT IV 600V; IP54 for the main unit.

Applications

• Installation of three-phase motors and drives: Confirming supply phase sequence to prevent motors from running in reverse and burning out, with immediate spot checks of input line voltage balance.
• High- and low-voltage panel and control cabinet maintenance: Quickly finding open phases (phase loss) and voltage anomalies by clamping directly on insulated wires, without opening terminal covers.
• Power acceptance in commercial buildings and factories: Phase sequence confirmation on new circuits; load balance checks for energy saving.