5-160 D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUALSYSTEM SETUP CHAPTER 5: SETTINGS5Figure 5-84: Power trigger logic5.5.7.17 df/dt triggeringSETTINGS SYSTEM SETUP PHASOR MEASUREMENT UNIT PHASOR MEASUREMENT UNIT 1 PMU 1TRIGGERING PMU 1 df/dt TRIGGERThis element responds to frequency rate of change. Separate thresholds are provided for rising and dropping frequency.The trigger responds to the rate of change of frequency (df/dt) of the Phasor Measurement Unit (PMU) source.PMU 1 df/dt TRIGGER RAISE — Specifies the pickup threshold for the rate of change of frequency in the raising direction(positive df/dt). The comparator applies a 4% hysteresis.PMU 1 df/dt TRIGGER FALL — Specifies the pickup threshold for the rate of change of frequency in the falling direction(negative df/dt). The comparator applies a 4% hysteresis.PMU 1 df/dt TRIGGER PKP TIME — Use to filter out spurious conditions and avoid unnecessary triggering of the recorder.PMU 1 df/dt TRIGGER DPO TIME — Use to extend the trigger after the situation returns to normal. This setting is of importancewhen using the recorder in the forced mode (recording as long as the triggering condition is asserted). PMU 1 df/dt TRIGGER PMU 1 df/dt TRIGGERFUNCTION: DisabledRange: Enabled, Disabled PMU 1 df/dt TRIGGERRAISE: 0.25 Hz/sRange: 0.10 to 15.00 Hz/s in steps of 0.01 PMU 1 df/dt TRIGGERFALL: 0.25 Hz/sRange: 0.10 to 15.00 Hz/s in steps of 0.01 PMU 1 df/dt TRIGGERPKP TIME: 0.10 sRange: 0.00 to 600.00 s in steps of 0.01 PMU 1 df/dt TRIGGERDPO TIME: 1.00 sRange: 0.00 to 600.00 s in steps of 0.01 PMU 1 df/dt TRG BLK:OffRange: FlexLogic operand PMU 1 df/dt TRIGGERTARGET: Self-resetRange: Self-reset, Latched, Disabled PMU 1 df/dt TRIGGEREVENTS: DisabledRange: Enabled, Disabled
