Thytronic NV10P - Page 75

75
NV10P - Manual - 01 - 2015
CHARACTERISTICS
Logic diagram concerning the second threshold (f<<) of the underfrequency element - 81U
Fun-F81U_S2.ai
RESET
t
f<<
0T
TRIPPING MATRIX (LED+RELAYS)
f<< Start
f<< Start
f<< Start
f<< Trip
f<< Trip
f<< Trip
BF Enable (ON≡Enable)
towards BF logic
&
f<< Block1
f<< BF
&
&
&
Enable (ON≡Enable)
From 3rd and/or 4th element
Block1 input (ON≡Block)
Block1
Block1
Binary input INx
T0
Logic
INx t
ON
INx t
ON
INx t
OFF
T0
n.o.
n.c.
INx t
OFF
&
f< inhibition
f<disbyf<<
(ON≡Inhibit)
f<< inhibition
f ≤ f <<
def
f <<
def
U
L1...
U
L3
Max(U
L1...
U
L3
) ≥20%U
n
f<<BF
f<<
ST-K
f<< ST-L
f<< TR-K
f<< TR-L
f<<BLK1
&
(closing)
DDI OFF->ON
(1≡upstream)
EnTcf<<def
t
atcf<<def
0T
RESET
t
f<<def
t
cf<<def
t
atcf<<def
“1”
“0”
≥1
(1≡DDI closed)
DDI state
(1≡upstream)
f<<disbyCB_OPEN
TV downstream
CB State
CB CLOSED (52a=ON)
CB OPEN (52a=OFF)
t
f<<
= t
cf<<def
t
f<<
= t
cf<<def
t
atcf<<def
t
f<<
t
f<<
= t
f<<def
Min(f
UL1,
f
UL2,
f
UL3
)f
UL1,
f
UL2,
f
UL3
Logic diagram concerning the third threshold (f<<<) of the underfrequency element - 81U
RESET
t
f
<<<
def
0T
TRIPPING MATRIX (LED+RELAYS)
t
f
<<<
def
f<<< Start
f<<< Start
f<<< Trip
f<<< Trip
f<<< Trip
BF Enable (ON≡Enable)
towards BF logic
&
f<<< Block1
f<<< BF
&
&
&
Enable (ON≡Enable)
Block1 input (ON≡Block)
Block1
Block1
Binary input INx
T0
Logic
INx t
ON
INx t
ON
INx t
OFF
T0
n.o.
n.c.
INx t
OFF
&
(ON≡
Inhibit )
f<< inhibition
f<<disbyf<<<
&
(ON≡
Inhibit )
f< inhibition
f<disbyf<<<
f <<<
def
f<<<BF
Fun-F81U_S3.ai
f<<< ST-K
f<<< ST-L
f<<< TR-K
f<<< TR-L
f<<<BLK1
f<<< inhibition
(ON≡ Inhibit )
&
f < f <<<
def
U
L1
,U
L2
,U
L3
Max(U
L1...
U
L3
) ≥20%U
n
≥1
(1≡DDI closed)
DDI state
(1≡upstream)
f<<<disbyCB_OPEN
Min(f
UL1,
f
UL2,
f
UL3
)f
UL1,
f
UL2,
f
UL3