DPDT relay energizes LED failure indicator Detect a phase loss condition Wye or Delta systems

The Model 259 3-Phase Monitor is designed to protect individual 3-phase equipment and motors, when used alone or in conjunction with shunt trip breakers. When correct voltage and phase rotation are applied an internal DPDT relay energizes.

A fault condition (phase loss, phase reversal, or low voltage) drops out the relay and lights the L E D 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 380VAC, 50Hz.
 

Typical Application	Dimensions