3-Phase Monitor

 

• Detects Phase Loss, Low Voltage and Phase Reversal
• Encapsulated Circuitry
• LED Status Indicator
• 1/4” Quick-connect Terminals

 

Description

The Model 2581 3-Phase Monitor is designed to continuously monitor 3-phase power lines for phase loss, low voltage and phase reversal. The Model 2581 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 .

The Model 2581 3-Phase Monitor does not require a neutral connection and can be used with Wye or Delta configured systems. Low voltage trip point is factory set at 10% below nominal. An LED indicator is provided for system troubleshooting.

 

Specifications

Model	2581-208	2581-220	2581-240	2581-480
Nominal Voltage (phase to phase)	208VAC	220VAC	240VAC	480VAC
Trip Point	189VAC	200VAC	218VAC	436VAC
Trip Point Tolerance	± 2%
Frequency	60Hz
Power Consumption	1.5W	1.65W	1.86W	4.5W
Transient Protection	2500 VRMS for 10ms
Repeat Accuracy	±0.1% (fixed conditions)
Response Time	50ms (set or reset)
Dead Band	Approx. 4%
Contact Rating	SPDT 10 amps at 240VAC resistive
Expected Relay Life	Mech:10 million operations Elec: 100,000 operations at rated load
Operating Temperature	- 20° to +131° F
Humidity Tolerance	97% w/o condensation
Enclosure Material	ABS plastic
Agency Approvals	Recognized to U.S. and Canadian requirements under the Component Recognition Program of Underwriters Laboratories, Inc.

Downloads

Document	File Type	File Size	Download
Model 2581 Datasheet	PDF	428 KB

© 2023 Relay Specialties, Inc.
17 Raritan Road, Oakland, NJ 07436 | 800-526-5376
Created By: G.Dezines