Time Mark Corporation A258B
Phase Monitoring Relay, 480 VAC, SPDT, 10A, 240 VAC, 8-Pin Octal, 258 Series
Mfr. Part #: A258B / RS Stock #: 70043347
Price
Qty.
Standard Price
1
$117.07
10
$111.21
25
$105.36
50
$99.51
100
$93.65
Additional Inventory
Manufacturer Lead Time:
3 weeks
Estimated manufacturer lead time is for quantities greater than shown above.
Bulk pricing available
Product Specifications
Product Attribute
Attribute Value
Search
Alternate Mfr Part Number
98083403
Contact Form
SPDT
Current Rating
10 A
Function
Phase Monitor
Monitoring Function
Phase Monitor
Mounting Type
Socketable
Number of Pins
8
Primary Type
Monitoring Relays
Product Description
Monitors 3-phase power lines for abnormal conditions. When properly adjusted, 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 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 troubleshooting.
Product Header
Solid State 3-Phase Monitor Relay
Relay Type
Electromechanical
Special Features
Automatic or Manual Reset
Standards
CSA, UL
Supply Voltage
480 VAC
Termination
8-Pin Octal
UPC Code
662917001831
Voltage Rating
240 V
Overview
A258B
258-Series, 3-Phase-Monitors
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 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.
258-Series, 3-Phase-Monitors
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 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.
