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The Model 2638 3-Phase Monitor combines a 3-phase monitor with a line voltage and phase sequence indicator. Like other Time Mark Monitors, the Model 2638 senses phase loss, phase reversal and low voltage.

When power and phasing are correct, the internal relay energizes. LED indicators will show that all phases are present, and the direction of phase rotation.

When a fault occurs, the monitor trips its relay and indicates which phase is lost, or, if a reversal is present. This allows you to automatically protect your equipment by correcting the appropriate fault condition.

The Model 2638 will automatically reset when correct power is restored. It is available in 208/240 VAC, 480 VAC, or 380 VAC/50 Hz.

Time Mark products are only sold through authorized Time Mark distributors. The "Buy Online" button will open a new browser window on Octopart.com and display Time Mark distributors that sell your desired product.

If Octopart does not currently display the Time Mark product you desire, please call us Toll-Free at (800) 862-2875 or use the Find a Distributor link on our website to find a distributor near you.

Additional Information

Automatic Reset




Manual Reset



Surface Mount

Phase Sensing

Phase Reversal,Phase Loss

Trip Delay


Trip Restart


Voltage Sensing

Under Voltage Protection

Voltage Range

380VAC,50 Hz