CHAPTER 11: METERING
PHASOR MEASUREMENT UNIT
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
545
Figure 473: Power 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 power triggering
function.
Active
Range: 0.250 to 3.000 pu in steps of 0.001
Default: 1.250 pu
This setting specifies the pickup threshold for the active power of the source. For single-
phase power, 1 pu represents the 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 the value for single-phase power. The
comparator applies a 3% hysteresis.
Reactive
Range: 0.250 to 3.000 pu in steps of 0.001
Default: 1.250 pu
This setting specifies the pickup threshold for the reactive power of the source. For
single-phase power, 1 pu represents the 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 the value for single-phase power. The
comparator applies a 3% hysteresis.
Apparent
Range: 0.250 to 3.000 pu in steps of 0.001
Default: 1.250 pu
This setting specifies the pickup threshold for the apparent power of the source. For
single-phase power, 1 pu represents the 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 the value for single-phase power. 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.
