GE D90 Plus Instruction Manual page 553

CHAPTER 11: METERING
Current triggering
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 470: Voltage triggering scheme logic
This phasor measurement unit current triggering function responds to elevated current.
The trigger responds to the phase current signal of the phasor measurement unit source.
All current channel (A, B, and C) are processed independently and could trigger the
recorder.
Select the Settings > Metering > Phasor Measurement Unit > Triggering > Current
Trigger menu item to open the phasor measurement unit current triggering window.
Figure 471: Current triggering configuration settings
The following settings are available for each phasor measurement unit.
Function
Range: Enabled, Disabled
Default: Disabled
This setting enables and disables the phasor measurement unit current triggering
function.
Pickup
Range: 0.100 to 30.000 pu in steps of 0.001
Default: 1.800 pu
This setting specifies the pickup threshold for the overcurrent trigger, in per-unit values
of the phasor measurement unit source. A value of 1 pu is a nominal primary current.
The comparator applies a 3% hysteresis.
Pickup Time
Range: 0.00 to 600.00 seconds in steps of 0.01
Default: 0.10 seconds
This setting may be used to filter out spurious conditions and avoid unnecessary
triggering of the recorder.
PHASOR MEASUREMENT UNIT
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