[loanwint-160611-01.tif, 2, en_US]
Figure 6-249 Internal Start of the Circuit-Breaker Failure Protection Function
External Start
The parameter Start via binary input is used to set whether the external start is initiated by a 1-
channel or 2-channel signal. The required routing of the input signals is compared with the setting. If a
routing is missing, an error message is generated. The Health signal changes to the state
Warning
.
[loanwext-030211-01.tif, 1, en_US]
Figure 6-250 Configuration of the External Start of the Circuit-Breaker Failure Protection Function
In 1-channel operation, the start is initiated with the binary input signal >Start only.
In 2-channel operation, the binary input signal >Release must also be activated to initiate the start. In the
default setting, the starting signal External start drops out immediately when the input signals have a
falling edge (see Figure 6-251). If necessary, the starting signal can be held. In this case the start remains
active when the binary input signals have a falling edge.
The input signals are monitored to avoid an unwanted pickup of the function.
If either of the signals >Start or >Release is active for more than the set supervision time of the corre-
sponding signal without the function picking up, an error in the binary input circuit is assumed. The corre-
sponding signal is blocked to exclude an external pickup of the function. An indication to this effect is output,
and the Health signal changes to the state
Warning
. The blocking is reset as soon as the binary input signal
drops out.
Protection and Automation Functions
6.41 Circuit-Breaker Failure Protection
838 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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