Binary Inputs; Binary Input Filter Time; Binary Input Inversion - ABB RELION 620 Series Technical Manual

Basic functions
Setting
Voltage input type
Division ratio
3.11

Binary inputs

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
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
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
is detected and the time tag t
Each binary input has a filter time parameter
of the binary input of the module in question (for example
Table 49: Input filter parameter values
Parameter
Input # filter time
112
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.
1
3
4
5
t
0
t
1
Input signal
Value
3=Voltage sensor
10000
2
5
4 Filtered input signal
5 Filter time
is attached.
1
"Input # filter" , where # is the number
Values
5...1000 ms
1MRS757644 H
. The high state starting from t
0
"Input 1 filter" ).
Default
5 ms
Technical Manual
0
1
620 series