S6 Current Elements469Motor Management RelaySetpointshttp://www.GEindustrial.com/multilin5–50 GE MultilinOverload Alarm PATH: SETPOINTS ZV S6 CURRENT ELEM. ZV OVERLOAD ALARMIf enabled as “Latched” or “Unlatched”, the Overload Alarm functions as follows.After a motor start, when the equivalent motor heating current exceeds theOVERLOAD PICKUP LEVEL, an alarm will occur. If programmed as “Unlatched”, theoverload alarm resets itself when the motor is no longer in overload. If programmedas “Latched”, the RESET key must be pressed to reset the alarm once the overloadcondition is gone. Event recording for all alarm features is optional.For example, it may be desirable to have an unlatched alarm connected to a PLCthat is controlling the load on a motor.Mechanical Jam PATH: SETPOINTS ZV S6 CURRENT ELEM. ZV MECHANICAL JAMIf turned On, the Mechanical Jam element function as follows. After a motor start, aTrip occurs once the magnitude of Ia, Ib, or Ic exceeds the Pickup Level × FLA for aperiod of time specified by the MECHANICAL JAM DELAY setpoint. This feature may beused to indicate a stall condition when running. Not only does it protect the motorby taking it off-line quicker than the thermal model (overload curve), it may alsoprevent or limit damage to the driven equipment if motor starting torque persists onjammed or broken equipment.The MECHANICAL JAM PICKUP level should be set higher than motor loading duringnormal operation, but lower than the motor stall level. Normally the delay is set tothe minimum time delay or set so that no nuisance trips occur due to momentaryload fluctuations. OVERLOAD [Z]ALARMOVERLOADALARM: OffRange: Off, Latched, UnlatchedMESSAGE ASSIGN ALARM RELAYS:AlarmRange: Alarm, Auxiliary2, Auxiliary3,Alarm & Aux2, Alarm & Aux3,Aux2 & Aux3, Alarm & Aux2 &Aux3MESSAGE OVERLOAD ALARMDELAY: 0.1 sRange: 0.1 to 60 s in steps of 0.1MESSAGE OVERLOAD ALARMEVENTS: OffRange: On, Off MECHANICAL [Z]JAMMECHANICAL JAMTRIP: OffRange: Off, Latched, UnlatchedMESSAGE ASSIGN TRIP RELAYS:TripRange: Trip, Trip & Auxiliary2, Trip &Aux2 & Aux3, Trip & Auxiliary3MESSAGE MECHANICAL JAMPICKUP: 1.50 x FLARange: 1.01 to 3.00 x FLA in steps of0.01MESSAGE MECHANICAL JAMDELAY: 1 sRange: 1 to 30 s in steps of 1
