Time Mark

Time Mark A258B 3-Phase Monitor

Name: Time Mark A258B 3-Phase Monitor
Brand: Time Mark
SKU: 98083403
Price: 73.17 USD
Availability: InStock

In stock

SKU: 98083403

$73.17 inc. VAT

Product variants

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

Manufacturer Specs

General Specifications
AUTO Reset MANUAL Reset	B258B B258BM	258B 258BM	A258B A258BM	EX258B EX258BM	B258B-400 B258BM-400	258B-400 258BM-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 operations Electrical: 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

Time Mark A258B 3-Phase Monitor

3 Phase Power

Manuals/Guides

Manufacturer Specs

Tech Specs

Three Phase Monitor Relays

Test Equipment General Attributes