ABB Relion 620 Series, Technical Manual

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Setting Value
Voltage input type 3=Voltage sensor
Division ratio 10000
3.11 Binary inputs
Use only DC power for binary inputs. Use of AC power or half-wave-
rectified AC power may cause damage to the binary input modules.
3.11.1 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
1 t
0
2 t
1
3 Input signal
4 Filtered input signal
5 Filter time
Figure 35: Binary input filtering
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 49: Input filter parameter values
Parameter Values Default
Input # filter time 5...1000 ms 5 ms
Basic functions 1MRS757644 H
112 620 series
Technical Manual