GE L90 Instruction Manual page 406

SYSTEM SETUP
PMU 1 POWER TRIGGER ACTIVE
1 pu is a product of 1 pu voltage and 1 pu current, or the product of nominal secondary voltage, the VT ratio and the
nominal primary current. For the three-phase power, 1 pu is three times that for a single-phase power. The comparator
applies a 3% hysteresis.
PMU 1 POWER TRIGGER REACTIVE
power, 1 pu is a product of 1 pu voltage and 1 pu current, or the product of nominal secondary voltage, the VT ratio and
the nominal primary current. For the three-phase power, 1 pu is three times that for a single-phase power. The comparator
applies a 3% hysteresis.
PMU 1 POWER TRIGGER APPARENT
power, 1 pu is a product of 1 pu voltage and 1 pu current, or the product of nominal secondary voltage, the VT ratio and
the nominal primary current. For the three-phase power, 1 pu is three times that for a single-phase power. The comparator
applies a 3% hysteresis.
PMU 1 POWER TRIGGER PKP TIME
PMU 1 POWER TRIGGER DPO TIME
particular importance when using the recorder in the forced mode (recording as long as the triggering condition is
asserted).
5
5.5.8.17 df/dt triggering
SETTINGS  SYSTEM SETUP  PHASOR MEASUREMENT UNIT  PHASOR MEASUREMENT UNIT 1  PMU 1
TRIGGERING  PMU 1 df/dt TRIGGER
 PMU 1 df/dt
 TRIGGER
5-182
— Specifies the pickup threshold for the active power of the source. For single-phase power,
— Specifies the pickup threshold for the reactive power of the source. For single-phase
— Specifies the pickup threshold for the apparent power of the source. For single-phase
— 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
Figure 5-94: Power trigger logic
PMU 1 df/dt TRIGGER

FUNCTION: Disabled
PMU 1 df/dt TRIGGER

RAISE: 0.25 Hz/s
PMU 1 df/dt TRIGGER

FALL: 0.25 Hz/s
PMU 1 df/dt TRIGGER

PKP TIME: 0.10 s
PMU 1 df/dt TRIGGER

DPO TIME: 1.00 s
PMU 1 df/dt TRG BLK:

Off
PMU 1 df/dt TRIGGER

TARGET: Self-reset
Range: Enabled, Disabled
Range: 0.10 to 15.00 Hz/s in steps of 0.01
Range: 0.10 to 15.00 Hz/s in steps of 0.01
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
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS