The function activates the PICKUP and PUDIRIN outputs.
3.
Assume that φ´ is the phase angle between injected voltage (3V
0
) and current (3I
0
)
i.e. φ´ =
RCADir
-φ. Change φ´ to for example 45 degrees. Increase the injected
current until the function trips.
4.
Compare the result with the set value and make sure that the new injected 3I
0
· 3V
0
·
cos φ is equal to the setting
SN_PU
. Take the set characteristic into consideration,
5.
Measure the trip time of the timer by injecting 1.2 ·
VNRelPU
and a current to get two
times the set
SN_PU
trip value.
Tinv
I
V
test
test
=
⋅
⋅
⋅
( )
TDSN SRef 3
3
0
0
cos
ϕ
ANSIEQUATION2403 V2 EN
(Equation 78)
6.
Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7.
Continue to test another function or complete the test by setting the test mode to
Disabled
.
Operation mode 3I
0
and φ
1.
Set the polarizing voltage to 1.2 ·
VNRelPU
and set the phase angle between voltage
and current to the set characteristic angle (
RCADir
). Note that the current lagging the
voltage.
2.
Inject current until the function picks up, and make sure that the trip current is equal
to the
INRelPU
setting for the set directional element.
Note that for pickup, both the injected current and voltage must be
greater than the set values
INRelPU
and
VNRelPU
respectively.
The function activates the PICKUPand PUDIRIN output.
3.
Measure with angles
j
around
/- ROADir.
4.
Compare the result with the set values, refer to figure
for example characteristic.
5.
Measure the trip time of the timer by injecting a current to get two times the set
SN_PU
trip value.
Tinv
I
V
test
test
=
⋅
⋅
⋅
( )
TDSN SRef 3
3
0
0
cos
ϕ
ANSIEQUATION2403 V2 EN
(Equation 79)
6.
Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7.
Continue to test another function or complete the test by setting the test mode to
Disabled
.
1MRK 511 366-UUS -
Section 11
Testing functionality by secondary injection
131
Commissioning manual
Содержание RES670 2.1
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