5–76 469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUALCHAPTER 5: SETTINGS5.10 S9 Voltage Elements5.10.1 UndervoltagePATH: SETTINGS ZV S9 VOLTAGE ELEM. Z UNDERVOLTAGEThe U/V ACTIVE ONLY IF BUS ENERGIZED settings may be used to prevent nuisance alarmsor trips when the bus is not energized. If this settings is programmed to “Yes”, at least onevoltage must be greater than 20% of the nominal nameplate voltage rating for any alarm/trip. If the load is high inertia, it may be desirable to trip the motor off-line or prevent it fromstarting in the event of a total loss of line voltage. Programming “No” for this settingsensures that the motor is tripped and may be restarted only after the bus is re-energized.UNDERVOLTAGE [U/V ACTIVE ONLYIFRange: No, YesMESSAGE UNDERVOLTAGEALARM: OffRange: Off, Latched, UnlatchedMESSAGE ASSIGN ALARMRELAYS:Range: Alarm, Alarm & Auxiliary2,Alarm & Aux2 & Aux3, Alarm &Auxiliary3, Auxiliary2, Aux2 &Aux3, Auxiliary3MESSAGE UNDERVOLTAGEALARMRange: 0.60 to 0.99 x RATED in steps of0.01MESSAGE STARTING U/VALARMRange: 0.60 to 1.00 x RATED in steps of0.01. Enter “1.00” to turn thisfunction off.MESSAGE UNDERVOLTAGEALARMRange: 0.0 to 60.0 s in steps of 0.1MESSAGE UNDERVOLTAGEALARMRange: On, OffMESSAGE UNDERVOLTAGETRIP: OffRange: Off, Latched, UnlatchedMESSAGE UNDERVOLTAGE TRIPMODE: 1-PhaseRange: 1-Phase, 3-PhaseMESSAGE ASSIGN TRIPRELAYS:Range: Trip, Trip & Auxiliary2, Trip &Aux2 & Aux3, Trip & Auxiliary3MESSAGE UNDERVOLTAGE TRIPPICKUP: 0.80 xRange: 0.60 to 0.99 x RATED in steps of0.01MESSAGE STARTING U/V TRIPPICKUP: 0.80 xRange: 0.60 to 1.00 x RATED in steps of0.01. Enter “1.00” to turn thisfunction off.MESSAGE UNDERVOLTAGE TRIPDELAY: 3.0 sRange: 0.0 to 60.0 s in steps of 0.1
