Schneider Electric Zelio control relay for 3-phase detection of voltage and pha

The Zelio RM22 control relay range brings to market 2 new key improvements.- The backlight LED dials for adjustment makes it easy to use in any condition, even in dusty or poorly lit enviroments. - The built-in testbutton simplifies commissioning and troubleshooting by a push of a button.RM22TR33 is a controlrelay for measuring 3-phase sequence, fase fault detection and over-/undervoltage. The measurement is made directly through the supply terminals L1, L2 and L3 on the top of the relay.The relay has 4 illuminated dials for setting up the relay.On the top dial you select the measurement range between 380 and 480V.The value is set to the voltage between 2 phasesThe next dial adjust the delay of the output which can be between 0,1 and 30 seconds. The bottom 2 dials set the maximum over and undervoltage in % in reference to the measuring value on the top dial.The relay has 2 LED's on the front which indicates if a fault is detected (Def) and the state of the relay output (R).The testbutton force the output when the timer is powered on.