Engineered and Built in the USA
B259
Categories: 259-Series, 3-Phase-MonitorsThe Model 259 3-Phase Monitor is designed to protect individual 3-phase equipment and motors, or in conjunction with shunt trip breakers. When correct voltage and phase rotation is applied, an internal DPDT relay energizes.
A fault condition (phase loss, phase reversal, or low voltage) drops out the relay and lights the LED failure indicator. The Model 259 will detect a phase loss condition even when regenerative voltage is present.
The Model 259 may be used with Wye or Delta systems and requires no neutral connection. Standard operating ranges are available from 120 to 575 VAC, 60Hz and 380 VAC, 50Hz
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Additional Information
| Automatic Reset | Yes |
|---|---|
| Contacts | DPDT |
| Manual Reset | No |
| Mount | Surface Mount |
| Phase Sensing | Phase Reversal,Phase Loss |
| Trip Delay | Yes |
| Trip Restart | Yes |
| Voltage Sensing | Under Voltage Protection |
| Voltage Range | 208/240VAC |
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19-415-50HZ
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19-380-50HZ
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18-480-400Hz
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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.
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