Siemens 6MD85, Manual

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Application and Setting Notes
Circuit Breaker
The Circuit-breaker function block in the SIPROTEC 5 device represents the physical switch device. The task of
the circuit breaker is to replicate the switch position from the status of the binary inputs.
The following figure shows the logical inputs and outputs of the Circuit-breaker function block.
[dwfuncls-140212-01.tif, 2, en_US]
Figure 6-5 Logical Inputs and Outputs of the Circuit-Breaker Function Blocks
Table 6-5 and Table 6-6 list the inputs and outputs with a description of their function and type. For inputs,
the effect of Quality = invalid on the value of the signal is described.
EXAMPLE
If the signal
>Ready
has the Quality = invalid, then the value is set to cleared. In problematic operating
states, the circuit breaker should signal that it is not ready for an Off-On-Off cycle.
Table 6-5 Inputs of the Circuit-Breaker Function Block
Signal Name Description Type Default Value if
Signal Quality =
invalid
>Ready
The signal
>Ready
indicates that the OFF-ON-OFF
cycle is possible with the circuit breaker.
This signal is used for the AREC standby status.
SPS Going
>Acquisition
blocking
The binary input activates acquisition blocking. You
can also set this binary input with an external toggle
switch. SPS Unchanged
>Reset
AcqBlk&Subst
Acquisition blocking and the substitution of the circuit
breaker are reset with this input. If the input is acti-
vated, setting the acquisition blocking and the substi-
tution is blocked. SPS Unchanged
>Reset switch
statist.
Among other things, the binary input sets the opera-
tion counter for the switch to the value 0. SPS Unchanged
6.2.2.2
Control Functions
6.2 Switching Devices
SIPROTEC 5, High-Voltage Bay Controller, Manual 311
C53000-G5040-C015-9, Edition 11.2017