ABB RELION REF615R, Техническое руководство

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3.9 Binary input
3.9.1 Binary input filter time
The filter time eliminates debounces and short disturbances on a binary input. The filter
time is set for each binary input of the protection relay.
1 2
3
4
5 5
GUID-13DA5833-D263-4E23-B666-CF38B1011A4B V1 EN
Figure 21: Binary input filtering
1 t
0
2 t
1
3 Input signal
4 Filtered input signal
5 Filter time
At the beginning, the input signal is at the high state, the short low state is filtered and no
input state change is detected. The low state starting from the time t
0
exceeds the filter
time, which means that the change in the input state is detected and the time tag attached
to the input change is t
0
. The high state starting from t
1
is detected and the time tag t
1
is
attached.
Each binary input has a filter time parameter "Input # filter", where # is the number of the
binary input of the module in question (for example "Input 1 filter").
Table 35: Input filter parameter values
Parameter Values Default
Input # filter time 5...1000 ms 5 ms
1MRS240050-IB C
Section 3
Basic functions
REF615R 75
Technical Manual