Time Mark Corporation 257B Monitor
Time Mark Corporation 257B Monitor
Part #:257B
SKU #: 2185186
Key Features
Part #:257B
SKU #: 2185186
Brand: Time Mark Corporation
Amperage Rating: 10 A
Contact Configuration: SPDT
Dimensions: 3.52 in H x 2.44 in W x 1.75 in D
Frequency Rating: 60 Hz
Number of Pins: 8
- 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
Time Mark Corporation 257B Monitor
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 (M) 3PH, 208/240VAC, 400Hz, SPDT, (98083702)
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)