57
NV10P - Manual - 01 - 2015
CHARACTERISTICS
Logical block (Block1)
If the U1<BLK1 enabling parameter is set to ON and a binary input is designed for logical block
(Block1), the protection is blocked off 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 parameter is available inside the Set \ Profi le A(or B) \ Positive sequence un-
dervoltage - 27V1 \ U1< Element \ Setpoints menus, while the Block1 function must be assigned to
the selected binary input inside the Set \ Inputs \ Binary input IN1(x) menus (IN1 or INx matching).
All the named parameters can be set separately for Profi le A and Profi le B.
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.
Logic diagram concerning the positive sequence undervoltage element - 27V1
Fun-F27V1_S1.ai
RESET
t
U1<def
0T
TRIPPING MATRIX
(LED+RELAYS)
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
T0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
U
1
≤
U
1
<
def
U
1
<
def
(ON≡
Inhibit
)
Disable 27 function by operator
&
State
≥1
(1≡DDI closed)
DDI state
(1≡upstream)
U1<disbyCB_OPEN
Logic diagram concerning the positive sequence undervoltage element - 27V1
Fun-F27V1_S1.ai
RESET
t
U1<def
0T
TRIPPING MATRIX
(LED+RELAYS)
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
T0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T0
n.o.
n.c.
INx
t
OFF
U
1
≤
U
1
<
def
U
1
<
def
(ON≡
Inhibit
)
Disable 27 function by operator
&
State
≥1
(1≡DDI closed)
DDI state
(1≡upstream)
U1<disbyCB_OPEN
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