74 S&C Instruction Sheet 461-504
Informational and Settings Screens
Note: The Sectionalizing feature serves as backup protection that works in parallel
with the TCC curve overcurrent protection. Enabling this feature does not automatically
switch the TCC curve overcurrent protection off and make the TripSaver II recloser a pure
sectionalizer. Instead, the TripSaver II recloser will begin to operate as a pure sectional-
izer for load or fault current that exceeds the High Current Cutoff setting.
An example of how the TripSaver II recloser will behave is shown in Figure 107. In this
example, the Sectionalizing mode starting current is set to its lowest setting of 10 A,
and the High Current Cutoff setting is set at its lowest value of 400 A. The initial trip
(TCC0) curve will still provide protection at currents less than 10 A.
Figure 107. An example of the Sectionalizer mode behavior.
Both the High Current Cutoff setting and Sectionalizing mode starting currents
are global and apply to each trip in the protection sequence.
In the zone between 10 A and 400 A, if the upline protective device is faster than the
TripSaver II recloser’s initial trip (TCC0), the upline device will interrupt the fault and
the downline TripSaver II recloser will increment its sectionalizer count by one. But if the
downline TripSaver II recloser is faster than the upline protective device, the downline
TripSaver II recloser will interrupt the fault and will increment its protection sequence
counter by one.
In the example shown in Figure 107, when a load or fault current of 400A or more is
incurred, the TripSaver II recloser will act as a pure sectionalizer and will not interrupt.
Instead, it will increment its Sectionalizing mode counts for each fault interrupted by
the upline recloser.
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