GE N60 Instruction Manual page 236

5.4 SYSTEM SETUP
This element responds to abnormal voltage. Separate thresholds are provided for low and high voltage. In terms of signal-
ing its operation, the element does not differentiate between the undervoltage and overvoltage events. The trigger
responds 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 could trigger the recorder. A minimum voltage supervision of 0.1 pu is
implemented to prevent pickup on a de-energized circuit, similarly to the undervoltage protection element.
• PMU 1 VOLT TRIGGER LOW-VOLT: This setting specifies the low threshold for the abnormal voltage trigger, in per-
unit of the PMU source. 1 pu is a nominal voltage value defined as the nominal secondary voltage times VT ratio. The
comparator applies a 1% hysteresis.
• PMU 1 VOLT TRIGGER HIGH-VOLT: This setting specifies the high threshold for the abnormal voltage trigger, in per-
unit of the PMU source. 1 pu is a nominal voltage value defined as the nominal secondary voltage times VT ratio. The
comparator applies a 1% hysteresis.
• PMU 1 VOLT TRIGGER PKP TIME: This setting could be used to filter out spurious conditions and avoid unnecessary
triggering of the recorder.
• PMU 1 VOLT TRIGGER DPO TIME: This setting could be used to extend the trigger after the situation returned to nor-
mal. This setting is of particular importance when using the recorder in the forced mode (recording as long as the trig-
gering condition is asserted).
5
h) CURRENT TRIGGERING

PATH: SETTINGS SYSTEM SETUP
 PMU 1 CURRENT
 TRIGGER
This element responds to elevated current. The trigger responds to the phase current signal of the phasor measurement
unit (PMU) source. All current channel (A, B, and C) are processed independently and could trigger the recorder.
5-120
Figure 5–38: VOLTAGE TRIGGER SCHEME LOGIC

PHASOR MEASUREMENT...
PMU 1 CURR TRIGGER
FUNCTION: Disabled
PMU 1 CURR TRIGGER
MESSAGE
PICKUP: 1.800 pu
PMU 1 CURR TRIGGER
MESSAGE
PKP TIME: 0.10 s
PMU 1 CURR TRIGGER
MESSAGE
DPO TIME: 1.00 s
PMU 1 CURR TRIG BLK:
MESSAGE
Off
PMU 1 CURR TRIGGER
MESSAGE
TARGET: Self-Reset
PMU 1 CURR TRIGGER
MESSAGE
EVENTS: Disabled
N60 Network Stability and Synchrophasor Measurement System
 
PMU 1 TRIGGERING PMU 1 CURRENT TRIGGER
Range: Enabled, Disabled
Range: 0.100 to 30.000 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic operand
Range: Self-Reset, Latched, Disabled
Range: Enabled, Disabled
5 SETTINGS
GE Multilin