FUNCTION CHARACTERISTICS
81
NA30 - Manual - 04 - 2022
An adjustable reset time delay is provided for every threshold
t
UE>RES
,
t
UE>>RES
,
t
UE>>>RES
).
Both residual overvoltage elements (
U
E
>,
U
E
>>) can produce the Breaker Failure output if the
UE>BF
and
UE>>BF
parameters are set to
ON.
The parameters are available inside the
Set \ Profile A(or B) \ Residual overvoltage - 59N \
UE> Element
(
UE>> Element) \ Setpoints
menus.
[1]
For every of the two thresholds the following block criteria are available:
Logical block (Block1)
If the
UE>BLK1
and/or
UE>>BLK1
enabling parameters are set to
ON
and a binary input is de-
signed 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.
[2]
The enabling parameters are available inside the
Set \ Profile A(or B) \ Residual over-
voltage - 59N \
UE> Element
(
UE>> 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 common settings concerning the Breaker failure protection are adjustable inside the
Breaker Failure - BF
menu.
Note 2 The exhaustive treatment of the logical block (Block 1) function may be found in the “Logic Block” paragraph inside
CONTROL AND MONITOR-
ING
section.
Timers-F59N.ai
UE> Start
UE> Trip
t
UE>
t
UE>
RESET
INPUT
t
UE>RES
t
UE>RES
t
UE>RES
t
Teimers concerning the first element of residual overvoltage protection- 59N
Logic diagram concerning the residual overvoltage element - 59N
all-F59N.ai
U
E
UE> Element
UE>> Element
Start U>>
Start UE>>
Start UE>
Trip UE>
Trip UE>>
&
UE> disbyUE>>
U> inhibition
t
UE> def
t
UE> inv
UE>
def
t
UE>> def
t
UE>>RES
t
UE>RES
UE>>
def
UE>
inv
UE> Curve
UE> Enable
State
Block1
BLK1UE>
&
UE>BLK1
Start UE>
&
Block1
BLK1UE>>
&
UE>>BLK1
Start UE>>
&
UE>BF
Trip UE> &
UE>BF
&
U
E
&
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&
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Common configuration
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