Will this work on 4/0 wire?

Yes I personally used it on 750MCM which is 5 times the diameter of 4/0. This is a great phase rotation meter.

Does it work on 480-V delta and wye systems?

Yes. It has worked perfectly on all systems and all voltages up to and including 480 for us. Excellent tool and much safer.

Will this work on the output of a VFD?

It should as long as the VFD is running (being commanded to go a direction at 50-60 HZ)

Can this be used on single phase 240 volt service?

Hi, phase sequence is only used to determine the correct phasing of the 3 phase supply. You need not use this device for single phase at all. You only need a volt meter to ensure that the supply is in order in terms of L N E.

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⚡ Stay ahead of the current—test smarter, not harder!

ERGONOMIC DESIGN - Fully insulated wide-jaw alligator clips provide secure, safe connections every time.
FREQUENCY FLEXIBILITY - Operates seamlessly within a 45-65Hz range, ensuring compatibility with global power systems.
HANDS FREE CONVENIENCE - Built-in magnet lets you attach the tester to panels for effortless, on-the-go diagnostics.
PRECISION VOLTAGE RANGE - Accurately tests from 75 to 1000VAC, covering all standard industrial and commercial applications.
INTUITIVE LED INDICATORS - Clear LEDs show phase orientation and live status, eliminating guesswork and boosting safety.

The Extech PRT200 is a robust non-contact phase sequence tester designed for professionals needing quick, accurate phase orientation and live phase detection across a wide voltage and frequency range. Its durable housing, magnetic back, and insulated wide-jaw clips make it an indispensable tool for efficient, safe electrical diagnostics.

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