• 158B

3-Phase Monitor Relay • Type: Reversal, Loss, Voltage • Coil Voltage: 208/240 VAC • Contact Configuration: SPDT (1 Form C) • Mounting: Base • Contact Current: 10 Amps

Series: Model 158(R)

Series Description: 

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 L E D 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.

The Model 158 can be DIN Rail or Surface Mounted.

Additional Specifications
Datasheet Download

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158B

  • Brands TimeMark
  • Product Code: 158B
  • Availability: Out Of Stock
  • $107.80


  • 5 or more $97.02
  • 10 or more $87.32
  • 25 or more $78.59

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Tags: TimeMark, 158B, Phase Monitor Relays