GE Multilin 745 Instruction Manual

Hardware Interface 745Transformer Management RelayInterfaceshttp://www.GEindustrial.com/multilin 4ñ3GE Multilinthe front panel display is sequentially displaying information about eachelement that has detected an abnormal condition.b) System Status Indicatorsï TRANSFORMER DE-ENERGIZED: The Transformer De-Energized LEDindicator is on when the energization inhibit feature has detected that thetransformer is de-energized. The indicator is on if the Energization Inhibitfeature is detecting the transformer as de-energizedï TRANSFORMER OVERLOAD: The Transformer Overload LED indicator is onwhen the Transformer Overload element has operated.ï LOAD-LIMIT REDUCED: The Load-Limit Reduced LED indicator is on when theadaptive harmonic factor correction feature is detecting enough harmoniccontent to reduce the load rating of the transformer. The indicator is on if S2SYSTEM SETUP !" HARMONICS ! HARMONIC DERATING ESTIMATION is ìEnabledî andthe harmonic derating function is below 0.96.ï SETPOINT GROUP 1(4): These indicators reflect the currently active setpointgroup. The indicators flash when the corresponding setpoint group is beingedited.c) Output Status Indicatorsï TRIP: The Trip LED is on when any output relay selected to be of the Trip typehas operated.ï ALARM: The Alarm LED is on when any output relay selected to be of theAlarm type has operated.ï PICKUP: The Pickup LED is on when any element has picked up. With thisindicator on, the front panel display is sequentially displaying information abouteach element that has picked up.ï PHASE A (C): The Phase A(C) LED is on when Phase A(C) is involved in thecondition detected by any element that has picked up, operated, or is now in alatched state waiting to be reset.ï Ground: The Ground LED is on when ground is involved in the conditiondetected by any element that has picked up, operated, or is now in a latchedstate waiting to be reset.Program Port Use the front panel program port for RS232 communications with the 745. Asdescribed in RS232 Front Panel Program Port on page 3ñ14, all that is required is aconnection between the relay and a computer running enerVista 745 Setup. Forcontinuous monitoring of multiple relays, use the COM1 RS485/RS422 port or theCOM2 RS485 port.Keypad a) DescriptionThe 745 display messages are organized into main menus, pages, and sub-pages.There are three main menus labeled Setpoints, Actual Values, and Target Messages.Pressing the MENU key followed by the MESSAGE % key scrolls through the three mainmenu headers, which appear in sequence as follows:SETPOINTS [!]ACTUAL VALUES [!]TARGET MESSAGES [!]