FUNCTION CHARACTERISTICS
34
NA10 - Manual - 04 - 2022
Trip Circuit Supervision.
Supervision with one or two binary input can be performed.
The exhaustive treatment of the TCS function is described in the concerning paragraph.
Trip ProtExt
The binary input detects a trip coming from an external protective relay: the information is available
for the breaker failure function (BF).
Reset counters
A change in status of a binary input effects a reset of all start/trip partial counters.
[1]
Reset CB Monitor
A change in status of a binary input effects a reset of all counters concerning the circuit breaker
diagnostic:
• Breaking Sum phase I
L1
• Breaking Sum phase I
L2
• Breaking Sum phase I
L3
• Breaking SumI
2
t phase I
L1
• Breaking SumI
2
t phase I
L2
• Breaking SumI
2
t phase I
L3
• CB Open counter
52a and 52b
The CB position can be acquired by means of binary inputs connected to the auxiliary contacts: the
information is used in the following functions:
• CB position (open-closed)
• CB diagnostic (N. of operations, trip time)
• Breaker Failure (BF)
Open CB
Note 1 The reset of the total counters is practicable by means ThyVisorcommand with Session Level 1 (available with password)
TCS2.ai
TRIP
+UAUX
Trip Circuit Supervision - 74TCS with two binary inputs
-UAUX
52a 52b
52
TCS1
TCS2
74TCS logic
74TCS logic
Binary input INx
T 0
IN1
t
ON
0
n.o.
n.c.
IN1 tON
Logic
IN1 tOFF
IN1
t
OFF
Binary input INx
T 0
IN1
t
ON
0
n.o.
n.c.
IN1 tON
Logic
IN1 tOFF
IN1
t
OFF
ExtProt.ai
Breaker failure (BF)
+UAUX
-UAUX
IN-
IN+
Trip ProtExt
Binary input INx
T 0
INx
t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOFF
INx
t
OFF
Binary input allocation for trip acquisition from external protection device
CB-pos.ai
CB position
CB diagnostic
Breaker failure (BF)
52a
52
52b
+UAUX
-UAUX
IN-
IN+
52a
IN-
IN+
52b
Binary input INx
T 0
INx
t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOFF
INx
t
OFF
Binary input INx
T 0
INx
t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOFF
INx
t
OFF
Binary input allocation for CB state acquisition
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