Description
The Model 252 3-Phase
Monitor continuously monitors 3-phase power lines for
abnormal conditions. When properly adjusted, the Model 252
will detect phase loss on a loaded motor even when regenerated
voltage is present.
The device consists of a
solid-state voltage and phase-angle sensing circuit, driving
an electromechanical relay with one SPDT and one SPST contact.
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 Model 252 will
automatically reset.
The Model 252 does not require
a neutral connection and can be used with Wye or Delta systems.
Four versions cover 120V, 208/240V and 480V, 60Hz, and 380V,
50Hz. Adjustment ranges are sufficiently wide to allow for
proper adjustment to existing conditions. Two LED indicator
are provided to aid in adjustment and system
troubleshooting.
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•
Detects phase loss, low voltage and phase reversal
• 50Hz and 60Hz models
• Automatic reset
• 5-Year unconditional
warranty
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Applications
