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Setting the parameter Dead time aft. 3-pole trip to ∞ (= invalid) avoids an automatic reclosing
after 3-pole tripping. Correspondingly, there is no automatic reclosing after 1-pole tripping if Dead time
aft. 1-pole trip is set to ∞ (= invalid).
As soon as an evolving fault is recognized (see chapter
switching to an automatic reclosing cycle for 3-pole interruption occurs. With the 3-pole cut-off of the
evolving fault, a separate adjustable dead time for the evolving fault begins. The total dead time is composed
of the part of the dead time that expired until the evolving fault was stopped for the first disruption plus the
dead time for the evolving fault. With the setting of the parameter Dead time aft. evolv. fault to ∞
(= invalid), no other automatic reclosing cycle is executed after tripping by the evolving fault. The tripping
through evolving faults is then finished.
3-pole Circuit-Breaker Condition With 1-Pole Tripping And Implausible Circuit-Breaker Condition
With applications with 1-pole tripping, during the dead time there is a plausibility check between the assigned
trip command and the flow of electricity in the open conductor. If the circuit-breaker auxiliary contacts are
connected pole-selectively, the plausibility check also occurs with the circuit-breaker auxiliary contacts. More
information can be found in the chapter
The plausibility check determines whether the circuit-breaker poles that have not been switched off after a 1-
pole trip command remain closed.
For an implausible circuit-breaker condition, a 3-pole trip-command synchronization for the circuit breaker is
executed, provided the trip-command synchronization through the parameter is permitted (parameter 3-
pole operate by 79 ). After this 3-pole tripping, if set and not blocked, more 3-pole automatic reclosing
cycles may follow.
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017
7.2.4.13 Evolving-Fault Detection During Dead
7.2.4.16 Circuit-Breaker Readiness and Circuit-Breaker Condition
Protection and Automation Functions
7.2 Automatic Reclosing Function
Time),
.
561
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