Time Mark Corporation 257B Phase Failure Relay

2185186 MFG #: 257B
$90.00 / EA

Time Mark Corporation 257B Phase Failure Relay

Time Mark Monitor, 3-Phase, Series: 257, 208/240 VAC, 10 A, 60 Hz Frequency, SPDT Contact Configuration, 8 Pins, Socket Mounting, 3.52 in H x 2.44 in W x 1.75 in D Dimensions, Red

Additional Description: TMC -257B 3PH,208/240V, 400Hz,SPDT,(98083702) 208/240VAC

Catalog Description: The Model 257 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 257 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 electromechanical 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 (a manual reset version is also available). The Model 257 does not require a neutral connection and can be used with Wye or Delta systems. Voltage ranges are sufficiently wide to allow for proper adjustment to existing conditions. Both TRIP and NORM condition indicators are provided to aid in adjustment and system trouble-shooting. (mfg. sku: 98083702)

QTY
  • Specifications
  • Auto reset
  • ABS plastic enclosure material
  • -20 to 131 deg F operating temperature
  • Phase reversal, phase loss phase sensing
  • Under voltage protection
  • 2.4 W power consumption