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\ df> Element (df>> 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
Block1
Block1
BF
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
Block1
Block1
BF
State
&
&
ON=inhibit
ON=inhibit
ON=inhibit
2nd Element
Block1
Block1
BF
1st Element
Block1
Block1
BF
State State
&
df>>> inhibition
df>> inhibition
df> inhibition
df>>>disbydf>>>>
df>>disbydf>>>> df>>disbydf>>>
df>disbydf>>>
df>disbydf>>
df>>disbydf>>>>
f
UL1
f
UL1
f
UL1
f
UL1
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