P12y/EN FT/D22 Technical Guide
User Guide
Page 24/108 MiCOM P125/P126/P127
Voltage Input
DC
To modify press 5 and using 8 2 keys to select the
AC or DC power supply for the digital input. Press 5
to confirm the setting. The power supply for any input
is the same one as much as the power supply for the
relay.
Start/Stop tAUX1
By Input LEVEL
To modify press 5 and using 8 2 keys to select if the
control of the timer is on the change of the LEVEL of
the relevant input or on the EDGE of the relevant input.
Press 5 to confirm the setting.
Start/Stop tAUX2
By Input LEVEL
To modify press 5 and using 8 2 keys to select if the
control of the timer is on the change of the LEVEL of
the relevant input or on the EDGE of the relevant input.
Press 5 to confirm the setting.
It is possible to configure the operation of the digital input, either on falling edge/low
level, or on rising edge/high level.
Falling edge or low level (idem for rising edge or high level) depends of the
application of the digital inputs.
Example : a digital input configured "blocking logic" will operate on level, on the
other hand a digital input configured "Cold load pick up" will operate on edge.
ONLY a digital input configured "change of setting group" can operate either on
edge or on level.
Function allocated to the Digital Input Operation of the Digital Input
Unlatch of the output relays On level
Position of the CB, 52a or 52b On level
Blocking logic 1 & 2 On level
Logic Selectivity 1 & 2 On level
Aux 1 & Aux 2 On level / On Edge
CB Fault On level
Reset of the thermal state On edge
Blocking of the Autorecloser On level
Cold load Pick Up On edge
Start of disturbance record On edge
Trip circuit supervision On level
Change of setting group On edge, or on level
CB Fail start On edge
The user has to set in the CONFIGURATION Menu the auxiliary voltage (AC or DC)
for the operation of the digital inputs. This setting is necessary due to the time filtering
different in DC and AC.
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