158-3-Phase-Monitor
dim-158app-158a

158B

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The Model 158 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 158 monitor will detect phase loss on a loaded motor even when regenerated voltage is present.

This device consists of a solid-state voltage and phase-angle sensing circuit, driving an electro-mechanical relay. When correct voltage and phase rotation are applied, the internal relay will energize. A fault condition will de-energize the relay. When the fault is corrected, the monitor will automatically reset.

The Model 158 does not require a neutral connection, and can be used with Wye or Delta systems. Four versions cover 120V, 208/240V, 480V (60Hz) and 380V (50Hz). Voltage ranges are sufficient to allow for proper adjustment to existing conditions. A front-mounted LED failure indicator is provided.

The R versions of the Model 158 monitor have an additional LED indicator for RESTART and a 5 minute short cycle timer, to delay restarting the motor.

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Additional Information

Automatic Reset

Yes

Contacts

SPDT

Manual Reset

No

Mount

DIN, Surface Mount

Phase Sensing

Phase Reversal,Phase Loss

Trip Delay

No

Trip Restart

Fixed

Voltage Sensing

Under Voltage Protection

Voltage Range

208/240 VAC