GE Multilin 350 Series Instruction Manual

Also see for ML Series 350: Communications manual User manual Communications manual Instruction manual

6–58 350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUALS4 CONTROL CHAPTER 6: SETPOINTSReferring to the Logic Element logic diagram above, the Logic Element can be set to one ofthe four functions: Control, Alarm, Latched Alarm or Trip. When Alarm, or Latched Alarmis selected, the output relay #1 (Trip) is not triggered when the logic element operates. TheTrip output relay will be triggered when Trip is selected as a function, and the Logicelement operates. The Logic element function can be also selected as Control, and usedwith the other relay elements, without turning on the ALARM, or the TRIP LED.The LED “PICKUP” will light on upon pickup condition no matter the selection of the logicelement function. The LED “ALARM” will light on upon Logic element operation only if eitherAlarm, or Latched Alarm selected. When Trip function is selected, the operation of the logicelement will light on the LED “TRIP” only. The selection to trigger auxiliary output relays isprovided for any selected logic element function.The following path is available using the keypad. For instructions on how to use thekeypad, please refer to Section 3.1.2.1 - Working with the Keypad.PATH: SETPOINTS > S4 CONTROLS > LOGIC ELEMENTS > LOGIC ELEMENT 1(8)LOGIC E1(8) FUNCTIONRange: Disabled, Control, Alarm, Latched Alarm, TripDefault: DisabledThis setting defines the use of the Logic Element. When “Trip” is selected as a function,the logic element will trigger the Output Relay # 1 (Trip) upon operation.LOGIC E1(8) ASSERTEDRange: On, OffDefault: OffThis setting defines which Logic Element state -“On” or “Off” - to be used as output fromthe logic.TRIGGER SOURCE 1, 2, 3Range: Off, Any input from the list of inputsDefault: OffEach of the three trigger sources is configurable, assigning an input selected from a listof inputs. An input can be a contact input, virtual input, or remote input. See the list ofavailable inputs from the table below.PICKUP TIME DELAYRange: 0 to 600 ms in steps of 1 msDefault: 1 msThis setting specifies the pickup time delay before Logic Element operation.DROPOUT TIME DELAYRange: 0 to 600 ms in steps of 1 msDefault: 1 msThis setting specifies the time delay from a reset timer that starts upon expiry of thepickup time delay and prolongs the operation of the Logic Element until its time expires.OUTPUT RELAYS 3 to 6Range: Do not operate, OperateDefault: Do not operateAny, or all, of output relays 3 to 6 can be selected to operate upon the Logic Elementoperating condition. The selection of auxiliary relay outputs is available no matterwhether the control Alarm, Latched Alarm, or Trip function is selected.