Time Mark B258B - 3-Phase Monitor, Auto Reset, 120VA

3-Phase Monitor Automatic reset Nominal AC voltage: 120VAC Case color: Gray Adjustment range: 85-120 VAC Frequency: 60Hz Power consumption: 1.4W Detects phase loss, low voltage, phase reversal ABS plastic cover The Time Mark B258B 3-Phase Monitor continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 258 monitor will detect phase loss on a loaded motor even when regenerated voltage is present. The B258B model offers automatic reset, 120VAC nominal AC voltage, gray case color, 85-120VAC adjustment range, 60Hz frequency, and 1.4W power consumption.This device consists of a solid-state voltage and phase-angle sensing circuit, driving an electromechanical relay. When the 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 258 series 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. Dimensions: Typical Application: Shown De-Energized Manuals/Guides Spec Sheets Data Sheet Manufacturer Specs Model:  B258B Specifications Description 3-phase monitor Nominal AC voltage(phase to phase) 120VAC Automatic Reset Yes Manual Reset No Case Color Gray Adjustment range 85-120VAC Frequency 60Hz Pwr consumption 1.4W Phase Sensing Phase Reversal,Phase Loss Trip Delay No Trip Restart No Voltage Sensing Under Voltage Protection Transient protection 2500VACfor 10ms Repeat accuracy ± 0.1% of set point (fixed conditions) Response time 50msdrop out Dead band Approx. 2% Output contacts SPDT 10 amps at 240VACresistive Expected relay life Mechanical: 10 million operationsElectrical: 100,000 operations at rated load Operating temp. -20° to +131° F Humidity tolerance 0 -97% w/o condensation Enclosure material ABS plastic cover Mounting 8-pin socket ( **sold separately) Weight 5 oz Agency approvals UL Recognized* and CSA Certified*Conditionsof acceptability:(1) the 380V and 480V versions must be used with a UL Recognized 600VACsocket. (2) For use in a Pollution Degree 2 environment  (3) To be installed on the load side of branch circuit protection rated 10A. Tech Specs Three Phase Monitor Relays 3-Phase Monitor Relay Function Phase Loss/Phase Reversal/Under Voltage Only Max Nominal Phase to Phase Voltage (monitors) 120 VAC Monitor Relay Contact Type SPDT Electrical Approval (monitor relays) CSA, UL Time Mark Mounting 8-pin Test Equipment General Attributes Warranty 5 YEARS Warranty Details This product is warranted to be free from defects in materials and workmanship, and is covered by our exclusive 5-year Unconditional Warranty. Safety Approval CSA, UL Product Weight 0.31 LBS Product Height 3.80 IN Product Length 1.95 IN Product Width 1.95 IN Shipping Weight 0.35 LBS HTS/Schedule B Number 8542.90.0000 ECCN Number EAR99 Country of Origin United States Shipping Height 3.80 IN Shipping Length 1.95 IN Shipping Width 1.95 IN