35
NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
Binary inputs
Two binary inputs are available.
The dry inputs must be powered with an external voltage, (usually the auxiliary power supply).
The connections are shown in the schematic diagrams.
The following settings can be used to confi gure each input:
Logic Active-ON (activated when powered), or Active-OFF (activated when power is turned off).
ON Timer (OFF-to-ON time delay) and OFF Timer (ON-to-OFF time delay).
Binary input allocation.
Adjustable debounce timer allows any transient to decay avoiding false activation of the input; the
positive transition is acquired if the input is permanently high for a time interval longer than the t
ON
setting delay; similarly for the negative transitions, the negative transition is acquired if the input is
permanently high for a time interval longer than the t
OFF
setting delay.
In the above shown diagram, INTERNAL STATE represents the logical state of the binary input used
in the following processing.
Each binary input may be matched to one of the following default functions.
FUNCTIONS
Binary inputs
IN1 IN2
Reset LEDs
gg
Set profile (switching setting A and B)
gg
Fault trigger (fault recording)
gg
DFR trigger (Oscillography)
gg
Block2 IPh/IE (selective block from phase and/or ground elements)
gg
Block2 IPh (selective block from phase elements)
gg
Block2 IE (selective block from ground elements)
gg
Block1 (logic block)
gg
TCS1 (Trip Circuit Supervision)
gg
TCS2 (Trip Circuit Supervision)
gg
Trip ProtExt (trip from external protection relays)
gg
Reset counters
gg
Reset CB Monitor (clear CB monitoring data)
gg
52a (CB auxiliary contact)
gg
52b (CB auxiliary contact)
gg
Open CB command
gg
Close CB command
gg
Preset DTheta (thermal image preset)
gg
Reset discharge remaining time
gg
Reset full discharge counters
gg
27 Element disabling
gg
Remote trip
gg
Reset on demand measures
gg
•
•
•
BINARY INPUT
INTERNAL STATE
t
ON
t
ON
t
OFF
t
OFF
t
binary-timers.ai
BINARY INPUT
INTERNAL STATE
t
ON
t
ON
t
OFF
t
OFF
t
binary-timers.ai
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