PSP8620311
Rev. E
31
6 — Control Programming
Time-Current Curve Selection
The control can be set to utilize two different time current curves TCC1 and TCC2. TCC1 and TCC2 can be set separately to use one of 15
different time current curves. See Reference Bulletin TD10005E through TD100034E. Each of the 4 possible operations can be set to use either
TCC1 or TCC2.
Time-Current Curve Modiers
Out of the 15 TCC curves, 11 of the curves come in with modifiers for greater coordination flexibility. By selecting Mod1, Mod2 or Mod3, the shape
of the time-current curve can be modified as shown in Reference Bulletin TD10005E through TD100026E.
Minimum Response Time
Minimum response time is used to achieve coordination between fault interrupting devices where fault levels would cause two devices in series to
both trip. When minimum response is enabled, tripping is inhibited until the minimum response time programmed is less than or equal to the fault
current time. The minimum response time is programmable from 0 to 250 milliseconds in 1 millisecond steps and can be enabled on operation
1, 2, 3, or 4. Minimum response can be enabled to each of the specific time current curves of the counts by checking the Enable Min. Response
option individually under each curve.
Basically, when a minimum response time is entered and the minimum response box is checked, the recloser will not open on the selected
shot until the minimum response time or the TCC time for that shot, whichever one is greater.
Reclose Time
Reclose Time is the amount of time from when the recloser interrupts the over-current until the recloser attempts to close the circuit again. Each of
the three possible reclose intervals is separately programmable from 0.25 to 60 seconds in 0.05 second increments.
Reset Time
Reset time is the amount of time from the last reclose until the present count of operations completed is reset to zero and it is also defined as
the amount of time from the last momentary over current event (current above minimum trip) the recloser sees until the timer expires. When the
recloser goes to lockout, the count is also reset to zero. Reset time is programmable from1 to 240 seconds in 1-second increments.
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