Description
The Model 258 3 Phase Monitor
continuously monitors 3-phase power lines for abnormal conditions.
When properly adjusted, the Model 258 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 (a manual
reset version is
also available).
The Model 258 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 TRIP and NORM condition
indicators are provided to aid in adjustment and system
trouble-shooting.
 |
•
Detects phase loss, phase reversal and low voltage
• 50Hz, 60Hz and 400Hz
models
• Automatic or manual reset
• 5-Year unconditional
warranty
|
Applications
