ABB SACE Tmax XT2 User Manual page 59

D Protection [2]
Parameter
Zone
Selectivity
Fw
selectivity
time
Bw
selectivity
time
StartUp
enable
StartUp
threshold
Fw
StartUp
threshold
Bw
StartUp time
Min Angle
Direction
Constraints, limitations, and additional functions
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Application notes
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1SDH002031A1002 ECN000092998
Description
Activates/deactivates the function and the display availability of
selectivity time, see page 71 for details
NOTE: for correct operation of selectivity D, configure
OFF selectivity S, S2 and G
This is the trip time of the protection with the zone selectivity
function active, forward direction and selectivity input Fw not
present, see page 71for details
The value is expressed in seconds, which are settable in a range:
0.1 s .. 0.8 s, with 0.01 s step
This is the trip time of the protection with the zone selectivity
function active, backward direction and selectivity input Bw not
present, see page 71for details
The value is expressed in seconds, which are settable in a range:
0.1 s .. 0.8 s, with 0.01 s step
Activates/deactivates the function and display availability of the
combined parameters, see page 73 for details
Protection threshold valid during Startup time, in the conditions in
which the function is active and with forward current direction, see
page 73 for details
The value is expressed both as an absolute value (Ampere) and as
a relative value (In), settable in a range:
0.6 In .. 10In with 0.1 In step
Protection threshold valid during Startup time, in the conditions in
which the function is active and with backward current direction,
see page 73 for details
The value is expressed both as an absolute value (Ampere) and as
a relative value (In), settable in a range:
0.6 In .. 10In with 0.1 In step
This is the time for which the StartUp threshold is active, calculated
from tripping of activation threshold, set details on page 73
The value is expressed in seconds, which are settable in a range:
0.1 s .. 30 s, with 0.01 s step
Ekip touch calculates the phase displacement angle between
measured reactive power and measured power: when the phase
displacement becomes greater than the set Min Angle Direction
parameter, the unit considers the fault direction
The value is expressed in degrees, which are settable in a range of
15 values from 3.6 ° to 69.6 °
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions, the selectivity type and the parameters Trip only
Forward and Trip Only Backward, see page 73.
Activating D directional protection automatically activates the alarm that controls the phase
sequence (that can also be deactivated and activated manually). Notice that in the case of
a cyclical sequence of the phases different from the value set, directional protection
reverses the direction of reference in case of malfunction with respect to what was
expected. The details of phase sequence protection are available on page 48.
In the event of small over-currents the behavior of the directional protection is influenced
by the type of load. To avoid the possibility of an incorrect detection of the direction of the
malfunction current in the event of a capacitive load, it is suggested that the regulation of
this protection be referred to real malfunctions and not to overloads
Rev. B
Default
OFF
0.13 s
0.13 s
OFF
2 In
2 In
0.1 s
3.6 °
SACE Tmax XT2 – XT4 | 59