FUNCTION CHARACTERISTICS
39
NA30 - Manual - 04 - 2022
Open CB
Close CB
The external acquisition of remote commands allows to drive CB remotely.
Preset DTheta
The input activation presets the thermal image (49).
The preset value can be adjusted by means the D
θ
IN
setting. The thermal image is initialized at the
D
θ
IN
value when the device is powered or when the binary input become active.
Remote trip
The input activation drives an expressly programmed output relay.
Reset demand measures
The input activation make a reset of all demand measures.
74TV ext
The external acquisition of 74TV allows to block or to change the operating mode of protective el-
ements where the residual voltage is employed; the information is available for residual voltage
protective elements (59N and 67N protections) that may operate inadvertently when an event cause
a loss of one or more voltages.
CB-com.ai
OPEN
Command
CLOSE
Command
+
U
AUX
+
U
AUX
-
U
AUX
IN-
IN+
IN-
IN+
Binary input INx (x=1,... 5)
T
0
IN1
t
ON
T
0
n.o.
n.c.
IN1 tON
Logic
Open CB
Close CB
IN1 tOF F
IN1
t
OFF
Binary input INx (x=1,... 5)
T
0
IN2
t
ON
T
0
n.o.
n.c.
IN2 tON
Logic
IN2 tOF F
IN2
t
OFF
Binary input allocation for CB remote command
TR
IP
PIN
G
M
AT
RIX
(
LE
D+R
EL
AY
S)
-
U
AUX
-
U
AUX
52a
52
O
I
52b
inhit-theta.ai
t = T+·ln{[(I
th
/I
B
)
2
-D
θ
P
/D
θ
B
]/[(I
th
/I
B
)
2
-1.2]
D
θ
P
= D
θ
IN
Binary input allocationfor thernal image preset (49)
+
U
AUX
-
U
AUX
IN+
IN-
PresetDTheta
PresetDTheta
Binary input IN1, IN2
T
0
Logic
IN1
t
ON
IN1
t
ON
IN1
t
OFF
0
n.o.
n.c.
IN1
t
OFF
Remote-trip.ai
Remote trip
+
U
AUX
-
U
AUX
Remote trip
Binary input IN1, IN2
T
0
IN1
t
ON
T
0
n.o.
n.c.
IN1 tON
Logic
IN1 tOF F
IN1
t
OFF
TR
IP
PIN
G
M
AT
RIX
(
LE
D+R
EL
AY
S)
Binary input allocation for remote trip