81
NV10P - Manual - 01 - 2015
CHARACTERISTICS
df>>> element may be inhibited by start of the fourth element (
df>>>>
) by setting
ON
the Disable
df>>> by start df>>>> (
df>>>disbydf>>>>
) parameter available inside the
Set \ Profi le A(or B)
\ Frequency rate of change-81R \ df>>>> Element \ Setpoints
menu.
The elements can be disabled in the case of connection of the measuring inputs (TV or TV-I-NI) down-
stream of the Device Interface when the DI is open. The threshold disabling is selected by setting
ON
the
df>disbyCB_OPEN, df>>disbyCB_OPEN, df>>>disbyCB_OPEN, df>>>>disbyCB_
OPEN
parameters, inside the
Set \ Profi le A(or B) \ Frequency rate of change-81R \ df> Element (df>>
Element, df>>> Element, df>>>> Element) \ Setpoints
menu.
For every of the four thresholds the logic block can be set.
Logical block (Block1)
If the
df>BLK1, df>>BLK1,
df>>>BLK1
and/or
df>>>>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) \ Frequency rate of
change-81R\
d
f> Element
(d
f>> Element, df>>> Element, df>>>> 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 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 frequency rate of change elements - 81R
all-F81R.ai
4th Element
Block 1
Block 1
B F
State
df
>>>>
t
df
>>>>
df
>>>
t
df
>>>
df
>>
t
df
>>
df
>
t
df
>
&
df
>>>> Start
df
>>>>Trip
df
>>> Start
df
>>>Trip
df
>> Start
df
>>Trip
df
> Start
df
>Trip
df
>>>> Start
df
>>>> Start
df
>>> Start
df
>>> Start
df
>> Start
df
>>>> Start
&
&
≥
≥
3rd Element
Block 1
Block 1
B F
State
&
&
ON=inhibit
ON=inhibit
ON=inhibit
2nd Element
Block 1
Block 1
B F
1st Element
Block 1
Block 1
B F
State
State
&
d f >>> i n h i b i t i o n
d f >> i n h i b i t i o n
d f > i n h i b i t i o n
d f >>> d i s b y d f >>>>
d f >> d i s b y d f >>>>
d f >> d i s b y d f >>>
d f > d i s b y d f >>>
d f > di s b y d f >>
d f >> d i s b y d f >>>>
f
UL1
f
UL1
f
UL1
f
UL1