3-phase monitoring relay with overvoltage undervoltage: 
Introduction 
3-phase voltage monitoring relay for phase sequence, phase loss, over and under voltage(separately adjustable setpoints) with built-in time delay function. Supply ranges from 208 to480 VAC covered by two multivoltage relays. 17.5 mm wide housing suit-able both for back and frontpanel mounting. 

TRMS 3-phase over and under voltage, phase sequence and phase loss monitoring relay Detects when all 3 phases are present and have the correct phase sequence 
Detects if all the 3-phase-phase are within the set limits 
Upper and lower limits separately adjustable 
Measures its own power supply Selection of measuring range by DIP-switches 
Adjustable voltage on relative scale 
Adjustable delay function (0.1 to 30 s) 
Output: 5 A SPDT relay N. E. 
For mounting on DIN-rail in accordance with DIN/EN 50 022 
22.5 mm DIN-rail housing 
LED indication for relay, alarm and power supply ON