3-Phase Monitor with Trip and Restart Delays

Description

The Model 19 continuously monitors 3-phase power lines for abnormal conditions. When properly adjusted, the Model 19 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 19 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. 

 

Specs

SPECIFICATIONS

Model

19-120

19-208/240

19-480

19-380-50

19-120-400

19-208/240-400

19-415-50

Nominal AC

(phase to phase)

120VAC

208/240VAC

480VAC

380VAC

120VAC

208/240VAC

415VAC

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)

Trip delay

1-30 sec.

Restart Delay

1-300 sec.

Dead band

Approximately 2%

Output contacts

SPDT   10 amps at 240VAC   resistive

Operating temp

-20° to +131° F

Enclosure material

NORYL plastic cover

Mounting

8-pin socket  ( **sold separately)

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