110
FUNCTION CHARACTERISTICS
The reactive power is compared with the setting value (Q
1
>
def
, Q
2
>
def
) powers above the associated
pickup value are detected and a start is issued. After expiry of the associated operate time (t
Q1
>
def,
t
Q2
>
def
) a trip command is issued; if instead the power drops below the threshold, the element is
restored.
The elements can be enabled or disabled by setting ON or OFF the State parameter inside the Set
\ Profile A (or B) \ Directional reactive overpower-32Q \ Q1> Element (Q2> Element) \ Definite time
menu.
An adjustable reset time delay is provided for every threshold (t
Q1>RES
, t
Q2>RES
).
.
Breaker failure (BF)
Each thresholds (Q1>, Q2>) can be associated to BF (H) and BF (L) protection by activating the rel-
ative parameter in the matrices “Selection of function tripping for BF (H)” or “Selection of function
tripping for BF (L)” in relevant BF menus
1
:
• Set \ Profile A (or B) \ Breaker failure - BF side H
• Set \ Profile A (or B) \ Breaker failure - BF side L
Logical block (Block1)
If the Q1>BLK1 and/or Q2>BLK1 enabling parameters is set to ON and a binary input is designed
for logical block (Block1), the protection is blocked 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) \ Directional reactive
overpower - 32Q \ Q1> Element (Q2> Element) \ Setpoints menu, while the Block1 function must be
assigned to the selected binary input inside the Set \ Board 1(2) inputs \ Binary input IN1-1...(IN1-x)
menus.
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.
Q
Q
1
>
t
t
Q1
>
TRIP
Q
1
>
TRIP
General operation time characteristic for the directional reactive power element - 32Q
General operation time characteristic for the directional reactive elements - 32Q
1st Pickup Element
Block1
Block1
Q
Q
1
> Start
Q
1
> Trip
2nd Pickup Element
Block1
Block1
P
Q
2
> Start
Q
2
> Trip
Q1>DIR
Q1>def
t
Q1
>def
Q2>DIR
Q2>def
t
Q2
>def
t
Q1>RES
t
Q2>RES
Q1> Start
Q1> Trip
RESET
INPUT
t
Q1>RES
t
Q1>def
t
Q1>def
t
Q1>RES
t
Q1>RES
t
Q1> element directional reactive power timers - 32Q
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
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