Arcteq AQ-S215, Инструкция по эксплуатации

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10. The I0Dir> stage trips a third time and gives the REQ2 request to the function. However, as
the function is in the process of calculating the SSho hot2 R t2 Reclaim T eclaim Time ime when it receives this
request, the function tries to move on to the next available shot. Alas, this scheme does not
have any more available shots and so the function begins the FFinal T inal Trip rip state and drops the
AR Running AR Running, SSho hot2 Running t2 Running and AR2 R AR2 Request equested ed signals. The function enters the AR L AR Lock- ock-
out out state to prevent any further requests for reclosing.
11. The circuit breaker is opened and the I0Dir> TRIP signal is released, and simultaneously the
REQ2 trip signal for the auto-recloser is released. The function is now in a steady lock-out
state and waits for the user to manually reset and re-initialize the function by closing the
breaker.
Auto-recloser sequence from Trip with two shots (high-speed fails, time-delayed
succeeds).
This auto-recloser scheme has the same starters and shots as the previous example. The setting and
signals are also the same. However, in this example the fault persists the high-speed shot but is cleared
by the time-delayed shot.
Figure. 5.4.4 - 93. Settings for I0dir> with two shots.
This type of sequence (i.e. two shots required to clear the fault) represents 10...15 % of all faults that
occur in MV overhead line networks.
Figure. 5.4.4 - 94. Signal status graph of the semi-permanent earth fault auto-recloser cycle.
A AQ Q-S215 -S215
Instruction manual
Version: 2.04
145