3-Phase Volt Loss Sectionalizing
This feature is only applicable when the Sectionalizing mode is set to the Yes setting.
See Figure 18. When the 3-Phase Volt Loss Sectionalizing feature is set to the No
setting, the switch control will not open the switch for an extended voltage loss. Select
the Yes setting to enable sectionalizing an extended three-phase voltage loss. Select the
ITSG Only option to enable sectionalizing from and extend three-phase voltage loss
when IntelliTeam SG is in the Ready state. When set to the ITSG Only option, the switch
control will not open because of an extended three-phase voltage loss if the IntelliTeam
SG system is not in the Ready state or for the duration of the Sectionalizer Reset and
Extended Voltage Loss Time condition.
If a switch has already operated, when the Voltage Loss timer expires, it will not try
to operate the switch if the extended voltage loss flag in the sectionalizing logic is still
set. The log message “Reclose sequence ended (time limit)” will be entered, indicating
the Voltage Loss timer has expired. If the extended voltage loss flag is still set, the mes-
sage “Sectionalizing Disabled for Voltage Loss Only” will be entered directly afterward.
Note: This setting must be set to the Yes or ITSG Only mode when using the
IntelliTeam SG Automatic Restoration System.
Loss of Voltage Threshold (RMS Volts)
This setpoint is congured on the Setup>General>Site-Related screen.
Sectionalizer Reset and Extended Voltage Loss Time (sec)
This setpoint is congured in the Sectionalizing section on this screen and is used as
the Loss of Voltage timer.
Phase Loss Protection Section
Phase Loss Protection
When the Phase Loss Protection feature is enabled and the switch control detects a loss
of voltage on one or two phases, it starts the Phase Loss Protection Time Threshold
timer. If the voltage loss persists and true RMS current remains below the setpoint until
the timer expires, the control trips open the line switch. If voltage returns on one phase
but is then lost on another phase, the switch control restarts the timer.
Figure 18. The Setup>General>Automatic Operation screen, with Three-Phase Volt Loss
Sectionalizing, Phase Loss Protection, and Automatic Reclose expanded.
Switch Control Setup
42 S&C Instruction Sheet 1045-530
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