107
NC20 - Manual - 01 - 2015
FUNCTION CHARACTERISTICS
All the named parameters can be set separately for
Profi le A
and
Profi le B
.
For every of the two thresholds the following block criteria are available:
Logical block (Block1)
If the
U>BLK1
and/or
U>>BLK1
enabling parameters are 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 parameters are available inside the
Set \ Profi le A(or B) \ Overvoltage - 59 \
U> Element
(
U>> 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).
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-F59_S1.ai
U
> Curve
0
T
RESET
t
U>
0
T
TRIP
P
ING
M
A
TRIX
(LED
+R
EL
A
Y
S
)
t
U>def
t
U>inv
Start U>
U>ST-K
Start U>
U>TR-K
U>ST-L
U>TR-L
Trip U>
Trip U>
Trip U>
BF Enable (ON
≡
Enable)
U>BF
towards BF logic
&
BLK1U>
U> BF
&
&
&
Enable (ON
≡
Enable)
Block1 input (ON
≡
Block)
U>BLK1
Block1
Block1
Binary input INx
T
0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
T
0
n.o.
n.c.
INx
t
OFF
U> Inhibition
(ON
≡
Inhibit)
&
Logic59
ON
≡
Enable U> overvoltage element
U> Enable
Logic diagram concerning the first threshold (U>) of the overvoltage element - 59
≥1
&
U
L1
U
L2
U
L3
≥
1
&
State
U
>
inv
U
≥
U>
def
U
≥
U>
inv
U
>
def
&
State
all-F59.ai
U
U
U> Element
U>> Element
Start U>>
Start U>>
Start U>
Trip U>
Trip U>>
&
U> disbyU>>
U> inhibition
t
U> def
t
U> inv
U>
def
t
U>>def
U>>
def
U>
inv
U> Curve
U> Enable
State
Block1
BLK1U>
&
U>BLK1
Start U>
&
Block1
BLK1U>>
&
U>>BLK1
Start U>>
&
U>BF
Trip U>
&
U>BF
General logic diagram of the overvoltage elements - 59
AND
U
U
L1
,
U
L2
,
U
L3
OR
Common configuration
Logic59
