Figure 37. The Percent of Trip Reached setpoints.
PulseFinding™ Fault Location Technique
In the “Initial Trip – Additional Features” section of each direction 2, select this
check box to enable PulseFinding Fault Location Technique for that direction. The
PulseFinding technique uses the
Open-Source Voltage Threshold
value specified
on the
Setup>Protection>General Profiles>Voltage Trip
screen in combination with
the
Setup>Protection>Advanced Setup>Advanced PulseFinding
Percent of Phase
Overcurrent Trip Reached
setpoint, and/or the
Percent of Ground Overcurrent
Trip Reached
setpoint, and/or the
Percent of Negative Sequence Overcurrent Trip
Reached
setpoint to open IntelliRupter fault interrupters that have not tripped. This
means an IntelliRupter fault interrupter will only open using the PulseFinding technique
provided its source voltage is below the
Open-Source Voltage Threshold
setpoint and
the percent of overcurrent trip timing has been reached or exceeded.
Open Source Voltage Threshold
This is the percentage of system voltage below which the PulseFinding technique is
enabled. (Range: 5-100; Step: 1; Default: 20)
TCC Shifting
When checked, all TCCs for Test Sequence Test-n are instantiated for the duration of
the
Test TCC Hold Time
setpoint.
Note:
n = 1 through 4. When the
Test TCC Hold
Time
setting expires and all TCCs for Test Sequence Test-n are quiet, the Initial Trip
TCCs are re-instantiated.
Because the
Test-n Delay
setpoint is active and timing when fault interrupters using
the PulseFinding technique trip, the
Test Delay Time
setting is needed to delay testing
until the upstream IntelliRupter fault interrupter has shifted back to the slower Initial
Trip TCC. Configure the
Test Delay Time
setting with a value ≥ the
Test TCC Hold
Time
s 100 ms.
This feature is used with the PulseFinding technique when there are concerns about
faults reinitiating because of dense vegetation and/or upstream conductor slap after the
PulseClosing Technology and closing events have completed.
Check the PulseFinding Technique and TCC Shifting check boxes for all series devices
configured with the same Initial Trip TCCs including the IntelliRupter fault interrupter
closest to the source.
For t he I ntel l iRupter fau lt i nter r upter closest to t he sou rce, on t he
Setup>Protection>Advanced Setup>Advanced PulseFinding
screen, set the
Percent
of Phase Overcurrent Trip Reached
,
Percent of Ground Overcurrent Trip Reached
and
Percent of Negative Sequence Overcurrent Trip Reached
setpoints to “Off.”
See Figure 37.
S&C Instruction Sheet 766-530 53
Protection Setup
