10. The SSho
hot2 R
t2 Reclaim T
eclaim Time
ime (10 s) is exceeded, and so the AR Running
AR Running, SSho
hot2 Running
t2 Running and
AR1
AR1 R
Request
equested
ed signals are terminated and the AR R
AR Reclaim
eclaim calculation begins. The difference
between auto-reclosing and shot-specific reclaim times is that the function jumps to the next
available shot should the fault returns. If a fault returns after a successful cycle and the
function's AR Reclaim signal is active, the function jumps directly to the Final Trip state and
then enters the lock-out state. The user can control this behavior through the function
settings. Both reclaim times can be set to 0 s when they are not needed, and the function
skips all timers that are set to zero. The user can also set is so that AR Reclaim is not used at
all after a successful recloser cycle.
11. The AR R
AR Reclaim
eclaim time is exceeded and the function is set to "Ready" to wait for the next
request.
Auto-recloser sequence from Start with two shots (high-speed succeeds).
This auto-recloser scheme has the same starters and shots as the two previous examples. The setting
and signals are also the same. However, in this example the fault is cleared by the high-speed shot.
Figure. 5.4.4 - 200. Settings for I> with two shots.
This type of sequence (i.e. the first shot clears the fault) represents 75...85 % of all faults that occur in
MV overhead line networks.
Figure. 5.4.4 - 201. Signal status graph of the transient overcurrent auto-recloser cycle.
A
AQ
Q-F215
-F215
Instruction manual
Version: 2.04
314
