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Description

Time Mark 257B-400HZThe 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

Alternate Mfr Part Number 98082302 Brand Time Mark Corporation Manufacturer Part Number 18-120 UPC Code 662917003699

Input voltages below the set-point will cause the output contact to de-energize and extinguish the LED indictor

including 50 Hz

Fasteners are typically used in pre-wire boxes and enclosures mounted on building exteriors

361-H-1SEC UPC Code

which is energized under normal operating conditions

The Model 4052 monitors

98093605 Brand

quick connect terminals

the other for applications from 5 to 25 amps

120VAC nominal AC voltage

Voltage ranges are sufficiently wide to allow for proper adjustment to existing conditions

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