Trip on Three Phase Voltage
Specify the
Yes
,
No
(Default), or
IntelliTeam SG
setting to configure this element. The
IntelliTeam SG
mode will cause this element to only be active when the IntelliTeam
SG system is in the
Ready
state.
Three Phase Low Voltage Threshold
This is the percentage of system voltage below which a
Three-Phase Trip
operation
will occur. (Range: 5-100; Step: 1; Default: 75)
Three Phase High Voltage Threshold
This is the percentage of system voltage above which a
Three-Phase Trip
operation
will occur. (Range: 100-200; Step: 1; Default: 120)
Current Supervised on Low Voltage
Specify the
Yes
or
No
(default) setting.
Threshold Current
If the
Current Supervised on Low Voltage
mode is specified, specify the value of
primary current. (Range: 10-16,000; Step: 1; Default: 800) The stated maximum is for
15-kV IntelliRupter fault interrupters; 27-kV and 38-kV are limited to 12,500 amps
maximum.
Three Phase Time to Trip
This is the time (in seconds) the
Low-Voltage
or
High-Voltage Threshold
setting must
be exceeded for a
Trip
operation to occur. (Range: 0.00-600.00; Step: 0.01; Default: 30.00)
Three Phase Reset Time
This is the time (in seconds) voltage must be present for the
Three-Phase Voltage
element to reset. (Range: 0.00-600.00; Step: 0.01; Default: 1.00)
Frequency Trip Section
Each Closing Profile has settings for multiple
Frequency Trip
elements.
Under Frequency Enabled
Specify the
Yes
or
No
(default) setting.
Under Frequency Threshold
This is the frequency (in hertz) below which a
Trip
operation will occur. Enter between
47 and 60 Hz, but the setting will be valid only if it falls within the range (System
Frequency - 3, System Frequency). (Minimum: System Frequency - 3 Hz; Maximum:
System Frequency; Default: System Frequency - 0.5 Hz; Increment: 0.01)
Over Frequency Enabled
Specify the
Yes
or
No
(default) setting.
S&C Instruction Sheet 766-530 107
Protection Setup