Siemens SIPROTEC 4 7VK61 Manual page 119

[logik-entsteh-signal-ls-hiko-wlk-010802, 1, en_GB]
Figure 2-35
If an internal protection function or an external protection device trips without current flow, the circuit
breaker failure protection is initiated by the internal input "Start internal w/o Ι", if the trip signal comes from
the internal voltage protection or frequency protection, or by the external input
case the start signal is maintained until the circuit breaker is reported to be open by the auxiliary contact crite-
rion.
Initiation can be blocked via the binary input
relay).
[logik-svs-phasengem-anwurf-wlk-010802, 1, en_GB]
Figure 2-36
Phase-segregated initiation
Phase segregated initiation of the circuit breaker failure protection is necessary if the circuit breaker poles are
operated individually, e.g. if 1-pole automatic reclosure is used. This is possible if the device is able to trip 1-
pole.
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
Creation of signal "CB ≥ any pole closed"
Breaker failure protection with common phase initiation
2.6 Circuit breaker failure protection (optional)
>BLOCK BkrFail (e.g. during test of the feeder protection
Functions
>BF Start w/o I . In this
119