contacts is interrupted. This information is provided to the circuit breaker failure protection by the central
function control of the device (refer to Section 2.8.1 Function Control).
The 3-phase starting signal “Start L123” is generated if there are start signals for more than one phase. The
input "BF Start w/o I" (e.g. from Buchholz protection) operates only in 3-phase mode. The function is the same
as with common phase initiation.
The additional release-signal
>BF release
(if assigned to a binary input) affects all external initiation condi-
tions. Initiation can be blocked via the binary input
>BLOCK BkrFail
(e.g. during test of the feeder protec-
tion relay).
[logik-7vk61-anwurfbed-1-pol-ausloese, 1, en_GB]
Figure 2-39
Initiation conditions for single-pole trip commands
Functions
2.6 Circuit breaker failure protection (optional)
SIPROTEC 4, 7VK61, Manual 121
C53000-G1176-C159-5, Edition 05.2018
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