3-Phase Monitor with Trip & Restart Delays

 

• Detects phase loss, low voltage, phase reversal
• 50Hz, 60Hz and 400Hz models
• Automatic reset
• UL Recognized in the U.S. and Canada
• Five year unconditional warranty

 

Description

The Model 18 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 18 monitor will detect phase loss on a loaded motor even when regenerated voltage is present.

This device consists of a microcontroller with a 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. An adjustable restart delay prevents short cycling in compressor applications and an adjustable trip delay prevents nuisance tripping during power fluctuations.

The Model 18 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 FAULT and NORM condition indicators are provided to aid in adjustment and system trouble-shooting. The Model 18 is UL Recognized in the U.S. and Canada and is available with optional gold flashed silver contacts for low current applications.

 

Specifications

Model	18-120	18-208/240	18-480	18-380-50	18-120-400	18-208/240-400	18-415-50
18-120-400	120VAC	208/240VAC	480VAC	380VAC	120VAC	208/240VAC	415VAC
Adjustment range	85-120VAC	160-240VAC	380-480VAC	300-400VA	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 protectio	2500VAC for 10ms
Repeat accuracy	± 0.1% of set point (fixed conditions)
Trip delay	1-30 sec.
Restart Delay	1-300 sec.
Dead Band	Approximately 2%
Output Contacts	SPDT 10 amps at 240VAC resistive (Low current options available for all models)*
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
Terminal Torque	3.5 in. lbs. maximum
Wire Type	Stranded or solid 14-28 AWG, 1/terminal
Enclosure Material	NORYL plastic
Mounting	DIN Rail or Surface Mount
Weight	5.1 oz.
*Low Current Options	For low current applications: Models ordered with suffix "/SG" will have silver with gold flash contacts (SPDT 5 amps at 120VAC resistive)
Agency Approval	UL Recognized (U.S. and Canada) (For use in a Pollution Degree 2 Environment)

Downloads

Document	File Type	File Size	Download
Model 18 Datasheet	PDF	334 KB

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