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90
NVA100X-D - Manual - 02 - 2016
FUNCTION CHARACTERISTICS
Logical block (Block1)
If the
U1<BLK1
enabling parameters is set to
ON
and a binary input is designed for logical block
(Block1), the protection is blocked whenever the given input is active.
The trip timer is held in reset condition, so the operate time counting starts when the input block goes
down.
[1]
The enabling parameters are available inside the
Set \ Profi le A(or B) \ Positive sequence
undervoltage - 27V1 \
U1< Element \ Setpoints
menu, while the
Block1
function must be assigned to
the selected binary input inside the
Set \ Board1(2) inputs \ Binary input IN1-1...INx-x
menus.
All parameters can be set separately for A and B setting profi les.
Note 1 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside
CONTROL AND MONITOR-
ING
section.
Fun-F27V1_S1.ai
Block 74VT
VT fault (74VT) (=0 without fault)
RESET
t
U1<def
0
T
TRIP
P
ING
M
ATRIX
(LED
+R
EL
AY
S
)
t
U1<def
Start U1<
U1<ST-K
Start U1<
U1<TR-K
U1<ST-L
U1<TR-L
Trip U1<
Trip U1<
Trip U1<
BF Enable (ON
≡
Enable)
U1<BF
towards BF logic
&
BLK1U1<
U1< BF
&
&
&
Enable (ON
≡
Enable)
Block1 input (ON
≡
Block)
U1<BLK1
Block1
Block1
U
1
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
Enable (ON
≡
Enable)
&
State
U
1
≤
U
1
<
def
U
1
<
def
MMI
Disable 27-37-81 functions by operator
&
(ON
≡
Inhibit)
Disable 27 function by operator
Logic diagram concerning the positive sequence undervoltage element - 27V1
Fun-F27V1_S1.ai
Block 74VT
VT fault (74VT) (=0 without fault)
RESET
t
U1<def
0
T
TRIP
P
ING
M
ATRIX
(LED
+R
EL
AY
S
)
t
U1<def
Start U1<
U1<ST-K
Start U1<
U1<TR-K
U1<ST-L
U1<TR-L
Trip U1<
Trip U1<
Trip U1<
BF Enable (ON
≡
Enable)
U1<BF
towards BF logic
&
BLK1U1<
U1< BF
&
&
&
Enable (ON
≡
Enable)
Block1 input (ON
≡
Block)
U1<BLK1
Block1
Block1
U
1
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
Enable (ON
≡
Enable)
&
State
U
1
≤
U
1
<
def
U
1
<
def
MMI
Disable 27-37-81 functions by operator
&
(ON
≡
Inhibit)
Disable 27 function by operator
Logic diagram concerning the positive sequence undervoltage element - 27V1