GE D90 Plus Instruction Manual page 554

PHASOR MEASUREMENT UNIT
Power triggering
544
Dropout Time
Range: 0.00 to 600.00 seconds in steps of 0.01
Default: 1.00 seconds
This setting may be used to extend the trigger after the situation returned to normal.
This setting is of particular importance when using the recorder in the forced mode
(recording as long as the triggering condition is asserted).
Block
Range: any metering logic operand or shared operand
Default: Off
Assertion of the operand assigned to this setting blocks operation of the phasor
measurement unit current triggering function.
Events
Range: Enabled, Disabled
Default: Disabled
This setting enables and disables the logging of phasor measurement unit current
triggering events in the sequence of events recorder.
The logic for the phasor measurement unit current triggering function is shown below.
Figure 472: Phasor measurement unit current triggering logic
The phasor measurement unit power triggering function responds to abnormal power.
Separate thresholds are provided for active, reactive, and apparent powers. In terms of
signaling its operation the element does not differentiate between the three types of
power. The trigger responds to the single-phase and three-phase power signals of the
phasor measurement unit source.
Select the Settings > Metering > Phasor Measurement Unit > Triggering > Power Trigger
menu item to open the phasor measurement unit power triggering window.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 11: METERING