GE L90 Instruction Manual
Also see for L90: Communications manualCommunications guideInstruction manualInstruction manualInstruction manual
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Contents
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vi L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUALTABLE OF CONTENTS5.6 FlexLogic........................................................................................................5-1685.6.1 FlexLogic operands........................................................................................................ 5-1685.6.2 FlexLogic rules.................................................................................................................. 5-1845.6.3 FlexLogic evaluation...................................................................................................... 5-1845.6.4 FlexLogic example.......................................................................................................... 5-1855.6.5 FlexLogic equation editor............................................................................................ 5-1905.6.6 FlexLogic timers............................................................................................................... 5-1905.6.7 FlexElements ..................................................................................................................... 5-1905.6.8 Non-volatile latches....................................................................................................... 5-1945.7 Grouped elements .......................................................................................5-1965.7.1 Overview ............................................................................................................................. 5-1965.7.2 Setting group 1................................................................................................................. 5-1965.7.3 Line differential elements............................................................................................ 5-1975.7.4 Line pickup ......................................................................................................................... 5-2025.7.5 Distance............................................................................................................................... 5-2045.7.6 Power swing detect (ANSI 68).................................................................................... 5-2255.7.7 Load encroachment ...................................................................................................... 5-2345.7.8 Phase current ................................................................................................................... 5-2355.7.9 Neutral current................................................................................................................. 5-2475.7.10 Wattmetric ground fault.............................................................................................. 5-2555.7.11 Ground current ................................................................................................................ 5-2595.7.12 Negative sequence current........................................................................................ 5-2665.7.13 Breaker failure (ANSI 50BF)......................................................................................... 5-2725.7.14 Voltage elements ............................................................................................................ 5-2825.7.15 Supervising elements.................................................................................................... 5-2945.7.16 Sensitive directional power ........................................................................................ 5-3005.8 Control elements .........................................................................................5-3035.8.1 Overview ............................................................................................................................. 5-3035.8.2 Trip bus ................................................................................................................................ 5-3035.8.3 Setting groups .................................................................................................................. 5-3055.8.4 Selector switch................................................................................................................. 5-3075.8.5 Trip output.......................................................................................................................... 5-3135.8.6 Underfrequency (ANSI 81U)........................................................................................ 5-3195.8.7 Overfrequency (ANSI 81O) .......................................................................................... 5-3205.8.8 Synchrocheck (ANSI 25) ............................................................................................... 5-3215.8.9 Digital elements............................................................................................................... 5-3265.8.10 Digital counters................................................................................................................ 5-3295.8.11 Monitoring elements ..................................................................................................... 5-3315.8.12 Pilot schemes.................................................................................................................... 5-3555.8.13 Autoreclose (ANSI 79) .................................................................................................... 5-3785.8.14 Frequency rate of change (ANSI 81R).................................................................... 5-3915.9 Inputs/outputs .............................................................................................5-3925.9.1 Contact inputs .................................................................................................................. 5-3925.9.2 Virtual inputs ..................................................................................................................... 5-3945.9.3 Contact outputs............................................................................................................... 5-3955.9.4 Virtual outputs.................................................................................................................. 5-3995.9.5 Direct inputs and outputs ........................................................................................... 5-3995.9.6 Resetting ............................................................................................................................. 5-4005.10 Transducer inputs/outputs........................................................................5-4015.10.1 DCmA inputs...................................................................................................................... 5-4015.10.2 RTD inputs .......................................................................................................................... 5-4025.10.3 DCmA outputs .................................................................................................................. 5-4035.11 Testing ...........................................................................................................5-4075.11.1 Test mode function ........................................................................................................ 5-4075.11.2 Test mode forcing........................................................................................................... 5-4075.11.3 Phasor Measurement Unit test values.................................................................. 5-408 |
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