GE C60 Instruction Manual page 386

SYSTEM SETUP
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).
5
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
5-178
PMU 1 FREQ TRIGGER

PKP TIME: 0.10 s
PMU 1 FREQ TRIGGER

DPO TIME: 1.00 s
PMU 1 FREQ TRIG BLK:

Off
PMU 1 FREQ TRIGGER

TARGET: Self-reset
PMU 1 FREQ TRIGGER

EVENTS: Disabled
— 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 5-93: 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
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
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
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS