5-160 F60 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUALSYSTEM SETUP CHAPTER 5: SETTINGS5Figure 5-80: Frequency trigger logic5.5.7.14 Voltage triggeringSETTINGS SYSTEM SETUP PHASOR MEASUREMENT UNIT PHASOR MEASUREMENT UNIT 1 PMU 1TRIGGERING PMU 1 VOLTAGE TRIGGERThis element responds to abnormal voltage. Separate thresholds are provided for low and high voltage. In terms ofsignaling its operation, the element does not differentiate between the undervoltage and overvoltage events. The triggerresponds to the phase voltage signal of the Phasor Measurement Unit (PMU) source. All voltage channels (A, B, and C or AB,BC, and CA) are processed independently and can trigger the recorder. A minimum voltage supervision of 0.1 pu isimplemented to prevent pickup on a de-energized circuit, similarly to the undervoltage protection element.PMU 1 VOLT TRIGGER LOW-VOLT — Specifies the low threshold for the abnormal voltage trigger, in per-unit of the PMUsource. 1 pu is a nominal voltage value defined as the nominal secondary voltage times VT ratio. The comparator applies a1% hysteresis.PMU 1 VOLT TRIGGER HIGH-VOLT — Specifies the high threshold for the abnormal voltage trigger, in per-unit of the PMUsource. 1 pu is a nominal voltage value defined as the nominal secondary voltage times VT ratio. The comparator applies a1% hysteresis.PMU 1 VOLT TRIGGER PKP TIME — Use to filter out spurious conditions and avoid unnecessary triggering of the recorder.PMU 1 VOLT 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 VOLTAGE TRIGGER PMU 1 VOLT TRIGGERFUNCTION: DisabledRange: Enabled, Disabled PMU 1 VOLT TRIGGERLOW-VOLT: 0.800 puRange: 0.250 to 1.250 pu in steps of 0.001 PMU 1 VOLT TRIGGERHIGH-VOLT: 1.200 puRange: 0.750 to 1.750 pu in steps of 0.001 PMU 1 VOLT TRIGGERPKP TIME: 0.10 sRange: 0.00 to 600.00 s in steps of 0.01 PMU 1 VOLT TRIGGERDPO TIME: 1.00 sRange: 0.00 to 600.00 s in steps of 0.01 PMU 1 VOLT TRIG BLK:OffRange: FlexLogic operand PMU 1 VOLT TRIGGERTARGET: Self-resetRange: Self-reset, Latched, Disabled PMU 1 VOLT TRIGGEREVENTS: DisabledRange: Enabled, Disabled
