The Megger PSI410 is used to indicate phase sequence via the use of LED indicator lights, allowing the user to determine the direction of phase on three-phase industrial and commercial equipment.

When testing phase the PSI410 shows the results as clearly rotating LED lights in a clockwise or anti-clockwise direction depending upon the phase rotation detected. It will also sound an audible tone specifically for either direction, making it easy to determine phase at all times.

The unit has a tough rugged case designed for an industrial
environment and is supplied with long fused test leads with croc-clips and prods. The prods have insulated tips that provide less than 4 mm exposed tip.


• LED clockwise and counter clockwise phase rotation indication.
• Audible indication.
• Phase condition LEDs.
• Fused test leads.
• Dual phase colour identification.

• The PSI410 is self powered from the supply and requires no batteries.

• The PSI410 is suitable for intermittent tests only and should not be used for continuous monitoring of phase rotation.