Under Frequency Minimum Time to Detect
This is the time (in seconds) the
Threshold
setpoint must be exceeded for a Loop
Restoration
Close
command to be blocked or IntelliTeam SG system to be set to
the
Prohibit Restoration
state. (Range: 0.06-600.00; Step: 0.02; Default: 1.00)
Reset Time
This is the time (in seconds) good frequency must be present for the
Frequency
element
to reset before the
Under Frequency Minimum Time to Detect
Timer
expires.
(Range: 0.06-600.00; Step: 0.02; Default: 1.00) After the
Under Frequency Minimum Time
to Detect
Timer
has expired, when frequency above the
Under Frequency Threshold
setting persists for more than 5 seconds the
Low-Frequency Indication
state is removed.
Sectionalizing elements can be used in place of overcurrent elements when
coordination is a concern. They can also be used in systems comprised of IntelliRupter fault
interrupters and 6800 Series Automatic Switch Controls. There is no directionality
associated with the sectionalizing elements. The fault-current settings used for
counting apply to both directions. When sectionalizing is used with the IntelliTeam II or
IntelliTeam SG system, the IntelliTeam system uses the
Good Source Voltage
Indication
and
Good Source Time to Detect
settings found on the
Setup>
Protection>General Profile>Voltage, Frequency, and Sectionalizing>Voltage Trip
screen to determine when the source returns. See Figure 53.
Sectionalizing Trip
Figure 53. The
Setup>Protection>General Profile 1>Voltage, Frequency, and Sectionalizing>
Sectionalizing Trip
screen.
Fault Current Detected – Counts to Trip
Specify the
Yes
,
No
(Default), or
IT SG Only
option to configure this element. When the
IT SG Only
option is selected, this element is only active when the IntelliTeam SG system
is in the
Ready
state. A fault-current count is defined as a fault current event followed
by a three-phase voltage loss. (Range: 1-10; Step: 1; Default: 3)
86 S&C Instruction Sheet 766-530
Protection Setup