Time Mark A258B 3-Phase Monitor

3 Phase Power Regenerated voltage is present Fault condition will de-energize the relay Manual reset version is also available Voltage ranges are sufficiently wide   The Model 258 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.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 258 3-Phase Monitor 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.  Typical Application Dimensions Manuals/Guides Spec Sheets Time Mark 258 3-Phase Monitor Data Sheet Manufacturer Specs General Specifications AUTO Reset MANUAL Reset B258BB258BM 258B258BM A258BA258BM EX258BEX258BM B258B-400B258BM-400 258B-400258BM-400 EX258B-415V Nominal AC voltage (phase to phase) 120VAC 208/240VAC 480VAC 380VAC 120VAC 208/240VAC 415VAC Case Color Gray Red Yellow Yellow Gray Red Yellow Adjustment range 85-120VAC 160-240VAC 380-480VAC 300-400VAC 85-120VAC 160-240VAC 340-440VAC Frequency 60Hz 60Hz 60Hz 50Hz 400Hz 400Hz 50Hz Power consumption 1.4W 2.4W 3.7W 3.0W 1.4W 2.4W 3.3W Transient protection 2500VAC for 10ms Repeat accuracy ± 0.1% of set point (fixed conditions) Response time 50ms drop out Dead band Approx. 2% Output contacts SPDT 10 amps at 240VAC resistive 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*Conditions of acceptability: (1) the 380V and 480V versions must be used with a UL Recognized 600VAC socket. (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) 480 VAC Min Nominal Phase to Phase Voltage (monitors) 480 VAC 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. Should this device fail to operate for any reason, we will repair it for five years from the date of manufacture. Safety Approval CSA, UL Product Weight 0.41 LBS Product Height 3.8 IN Product Length 1.95 IN Product Width 1.95 IN Country of Origin United States UPC 662917001831