Symcom 455 Symcom Voltage Monitoring Relay

Brand: Littelfuse

Part Number: 455

Littelfuse Symcom Voltage Monitoring Relay, 3-Phase Dual Range, Series: 455, 190 to 480 VAC, 50/60 Hz Frequency, SPDT 1 Form C Contact Configuration, Threaded Mounting, 2 to 30 s Trip Delay, 5.27 in W x 2.95 in D x 2.93 in H Dimensions

Additional Description: LTFS-455 3-PHASE LINE-LOAD VOLT MON/ 19 Volt.Mon./190-480V/adj.VUB,TD,RD

Catalog Description: The 455 Series are 3-phase voltage monitors that combine load and line side monitoring to offer complete protection. Monitoring the load side will alert the user of contactor failure or impending contactor failure. Line side monitoring will also protect the motor from damaging fault conditions that may be present prior to the motor starting. With other line/load side monitors, the motor must be started before a voltage fault is detected. With the 455, your motor is fully protected at all times. The 455 Series are 3-phase, dual range voltage monitors that protect 190-480VAC, 50*/60Hz motors, regardless of their size. It automatically selects between the 200V and 400V range when the user selects the nominal voltage setpoint. Other adjustments include a 2-30 second trip delay, a 2-300 second restart delay (and manual restart) and a voltage unbalance trip point of 2-8%. The voltage monitor’s circuitry is powered through the line side connections, so there is no need for separate control p