FUNCTION CHARACTERISTICS
107
The element has two adjustable thresholds with time definite delay.
The active power is compared with the setting value (P
1
>
def
, P
2
>
def
) powers above the associated
pickup value are detected and a start is issued. After expiry of the associated operate time (t
P1
>
def,
t
P2
>
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 active overpower-32P \ P1> Element (P2> Element) \ Definite time menu.
An adjustable reset time delay is provided for every threshold (t
P1>RES
, t
P2>RES
).
Logical block (Block1)
If the P1>BLK1 and/or P2>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.
[1]
The enabling parameters are available inside the Set \ Profile A (or B) \ Directional active
overpower - 32P \ P1 Element (P2 > Element) \ Setpoints menu, while the Block1 function must be
assigned to the selected binary input inside the Set \ Board1(2) inputs \ Binary input IN1-1...INx-x
menus.
Breaker failure (BF)
Each thresholds (P1>,P2>) can be associated to BF (H) and BF (L) protection by activating the relative
parameter in the matrices “Selection of function tripping for BF (H)” or “Selection of function tripping
for BF (L)” in relevant BF menus
[2]
:
• Set \ Profile A (or B) \ Breaker failure - BF side H
• Set \ Profile A (or B) \ Breaker failure - BF side L
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.
Note 2 The common settings concerning the Breaker failure protection are adjustable inside the Breaker Failure - BF menu.
P
P
1
>
t
t
P1
>
TRIP
P
1
>
TRIP
General operation time characteristic for the directional active power element - 32P
General operation time characteristic for the directional active elements - 32P
1st Pickup Element
Block1
Block1
P
P
1
> Start
P
1
> Trip
2nd Pickup Element
Block1
Block1
P
P
2
> Start
P
2
> Trip
P1>DIR
P1>def
t
P1
>def
P2>DIR
P2>def
t
P2
>def
t
P1>RES
t
P2>RES
P1> Start
P1> Trip
RESET
INPUT
t
P1>RES
t
P1>def
t
P1>def
t
P1>RES
t
P1>RES
t
P1> element directional active power timers - 32P
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
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