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ICS TRIPLEX T8830控制模塊
重合閘嘗試的最大故障持續時(shí)間“t操作”
如果故障持續一段時(shí)間，則成功重合閘的概率降低。電力系統的可能性故障持續很長(cháng)時(shí)間后，如果自動(dòng)重合閘嘗試失敗，則變得不穩定的可能性更大時(shí)期正是由于這些原因，在開(kāi)始可啟動(dòng)重合閘的故障是有限的。過(guò)錯使用參數“t Oper”設置持續時(shí)間。故障持續時(shí)間的計時(shí)器由拾取信號啟動(dòng)從保護功能（啟動(dòng)）。導致跳閘的故障在“t Oper”被鎖定（“Def.Trip”）后，重合閘不會(huì )發(fā)生
如果故障持續時(shí)間在保護跳閘之前到期，自動(dòng)重合閘被阻止，回收時(shí)間開(kāi)始。示例：距離函數的時(shí)間“T操作”<“延遲（2）”表示自動(dòng)重合閘僅在第一距離內發(fā)生故障區域（“延遲（1）”。
僅使用電流的方案不需要此功能功能。二進(jìn)制輸入“啟動(dòng)”和“跳閘斷路器3P”連接在一起（見(jiàn)第3.5.32.3節）?；厥諘r(shí)間“不抑制”禁止時(shí)間的目的之一是允許：斷路器恢復其全部耐壓能力。為此結束，在設定的時(shí)間內禁用自動(dòng)重合閘功能
以下事件之一后的參數“禁止”：
最后一次重合閘嘗試
故障后保護跳閘導致的最終跳閘持續時(shí)間“t操作”
鑒別時(shí)間和死區時(shí)間之間的重復跳閘（正在演變的故障，請參閱O/P信號“Def.Trip”）。
關(guān)閉信號持續時(shí)間“不關(guān)閉”斷路器閉合信號（命令O/P“閉合CB”）的最大持續時(shí)間由參數“t閉合”確定。在此期間發(fā)生的任何跳閘信號都會(huì )覆蓋關(guān)閉信號。第二次、第三次或第四次重合閘嘗試只能如果下一次行程發(fā)生在“關(guān)閉”時(shí)間內，則發(fā)生。
辨別時(shí)間“t 1P discrim”和“t 3P discrim”識別時(shí)間決定以下情況下的程序：死區時(shí)間內發(fā)生的不同類(lèi)型的故障（演變故障），即其他兩個(gè)相位中的一個(gè)也拾取或跳閘信號復位并再次拾取。辨別時(shí)間是
從死時(shí)間開(kāi)始。如果在識別時(shí)間到期和死區時(shí)間結束之前，由于不斷演變的故障而再次出現跳閘信號，則回收計時(shí)器并啟動(dòng)最終跳閘（“Def.trip”）。死期并且信號“AR in prog.”重置。
如果第一個(gè)故障最初是接地故障，并在時(shí)間“t死1 1P”，但在鑒別時(shí)間“t”結束之前
Discrim 1P'啟動(dòng)死區時(shí)間“t Dead1 3P”，并進(jìn)行三相重合閘。
Maximum fault duration for a reclosure attempt ‘t Oper’
If a fault has persisted for some time, the probability of a successful reclosure reduces. The likelihood of the power system
becoming unstable is also greater for an unsuccessful auto-reclosure attempt following a fault which has persisted for a long
period. It is for these reasons that the time after the inception of
a fault during which reclosure can be initiated is limited. The fault
duration is set using parameter ‘t Oper’.
The timer for the fault duration is started by the pick-up signal
from the protection function (Start). Faults resulting in tripping
after ‘t Oper’ are locked out (‘Def. Trip’) and reclosure does not
take place.
Should the fault duration time expire before the protection trips,
auto-reclosure is blocked and the reclaim time is started.Example:
Time ‘T Oper’ < ‘Delay(2)’ of the distance function means that
auto-reclosure only takes place for faults in the first distance
zone (‘Delay(1)’).
This function is not required for schemes that only use current
functions. The binary inputs ‘Start’ and ‘Trip CB 3P’ are connected together (see Section 3.5.32.3.).
Reclaim time ‘t inhibit’
The purpose of the inhibit time is among other things to permit
the circuit-breaker to recover its full voltage withstand. To this
end, it disables the auto-reclosure function for the time set for
parameter ‘t inhibit’ after one of the following events:
the last reclosing attempt
a definitive trip resulting from a protection trip after the fault
duration time ‘t Oper’
a recurring trip between discrimination time and dead time
(evolving fault, see O/P signal ‘Def. Trip’).
Close signal duration ‘t Close’
The maximum duration of the circuit-breaker close signal (command O/P ‘Close CB’) is determined by the parameter ‘t Close’.
Any tripping signal which occurs during this time overrides the
close signal. A second, third or fourth reclosure attempt can only
take place, if the next trip occurs within the time ‘t Close’.
Discrimination times ‘t 1P discrim.’ and ‘t 3P discrim.’
The discrimination time determines the procedure in the event of
a different kind of fault occurring during the dead time (evolving
fault), i.e. one of the other two phases also picks up or the tripping signal resets and picks up again. The discrimination time is
started together with the dead time. Should a tripping signal recur due to an evolving fault between the expiry of the discrimination time and before the end of the dead time, the reclaim timer
is started and a definitive trip (‘Def. Trip’) initiated. The dead time
is also discontinued and the signal ‘AR in prog.’ reset.
If the first fault was initially an earth fault and evolves during the
time ‘t Dead1 1P’, but before the end of the discrimination time ‘t
Discrim 1P’, the dead time ‘t Dead1 3P’ is started and threephase reclosure takes place.
