85
NC2 0 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
Fun_50-51AL.ai
I
L1RMS
I
L2RMS
I
L3RMS
RESET
t
>AL
0T
≥1
≥1
Start I>AL
Trip I>AL
CB-State
ON≡Inhibit (from I>, I>> and/or I>>> overcurrent element)
ON≡Enable I>AL overcurrent element
(Pickup within CLP)
(Pickup outside CLP)
I>AL inhibition
&
T0
t
CLP>AL
ICLP>ALMode
I
CLP
>
AL
def
t
CLP>AL
TRIPPING MATRIX
(LED+RELAYS)
A
B
C
A =“1”A =“0 or OFF”
Output t
CLP>AL
I>AL Enable
t
CLP>
CB State CB OPEN CB CLOSED CB OPEN
Output t
CLP>
t
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK
HIGH THRESHOLD/
BLOCK
A = ON - Change setting
B = OFF
C = ON - Element blocking
I>ALTR-K
I>ALTR-L
I>ALST-L
I>ALST-K
≥1
CLP I>AL
I
L1RMS
≥
I>
ALdef
I>
ALdef
I
L1RMS
≥
I
CLP
>
AL
def
t
>ALdef
Phase overcurrent (50/51 RMS) - Alarm element logic diagram (I>
AL
)
Binary input INx
T0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
BLK1I>Al
&
&
&
Enable (ON≡Enable)
I>ALBLK1
Block1
Start I>
AL
Trip I>
AL
Block1
Block1
To Next Page
Loading...