GE c60 Instruction Manual page 273

CHAPTER 5: SETTINGS
The trigger responds to the frequency signal of the Phasor Measurement Unit (PMU) source. The frequency is calculated
from among phase voltages, auxiliary voltage, phase currents, and ground current, in this hierarchy, depending on the
source configuration as per C60 standards. This element requires that the frequency be above the minimum measurable
value. If the frequency is below this value, such as when the circuit is de-energized, the trigger drops out.
PMU 1 FREQ TRIGGER LOW-FREQ
0.02 Hz hysteresis.
PMU 1 FREQ TRIGGER HIGH-FREQ
a 0.02 Hz hysteresis.
PMU 1 FREQ TRIGGER PKP TIME
PMU 1 FREQ TRIGGER DPO TIME
when using the recorder in the forced mode (recording as long as the triggering condition is asserted).
Voltage triggering
SETTINGS  SYSTEM SETUP  PHASOR MEASUREMENT UNIT  PHASOR MEASUREMENT UNIT 1(2)  PMU 1(2)
TRIGGERING  PMU 1(2) VOLTAGE TRIGGER
 PMU 1 VOLTAGE
 TRIGGER
This element responds to abnormal voltage. Separate thresholds are provided for low and high voltage. In terms of
signaling 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 can 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.
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
— Specifies the low threshold for the abnormal frequency trigger. The comparator applies a
— Specifies the high threshold for the abnormal frequency trigger. The comparator applies
— Use to filter out spurious conditions and avoid unnecessary triggering of the recorder.
— Use to extend the trigger after the situation returns to normal. This setting is of importance
Figure 5-70: Frequency trigger logic
PMU 1 VOLT TRIGGER

FUNCTION: Disabled
PMU 1 VOLT TRIGGER

LOW-VOLT: 0.800 pu
PMU 1 VOLT TRIGGER

HIGH-VOLT: 1.200 pu
PMU 1 VOLT TRIGGER

PKP TIME: 0.10 s
PMU 1 VOLT TRIGGER

DPO TIME: 1.00 s
PMU 1 VOLT TRIG BLK:

Off
PMU 1 VOLT TRIGGER

TARGET: Self-Reset
PMU 1 VOLT TRIGGER

EVENTS: Disabled
Range: Enabled, Disabled
Range: 0.250 to 1.250 pu in steps of 0.001
Range: 0.750 to 1.750 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
SYSTEM SETUP
5
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