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Section 11
Testing functionality by secondary injection
11.8.2.4
11.8.2.5
152
×
=
+
+
3
V
V
V
V
0
A
B
EQUATION1819-ANSI V1 EN
Where:
V V
V
and
A
B
C
EQUATION1820-ANSI V1 EN
4.
Compare the result with the set value of the zero-sequence tripping voltage (consider
that the set value 3V0Pickup is in percentage of the base voltage.)
5.
Repeat steps
1
and 2. Then slowly increase the measured current in one phase until
the BLKV signal disappears.
6.
Record the measured current and calculate the corresponding zero-sequence current
according to the equation (observe that the currents in the equation are phasors):
×
+
+
3
I
=
I
I
I
0
A
B
ANSIEQUATION00019 V1 EN
Where:
,
I
I and I
A
B
C
ANSIEQUATION00020 V1 EN
7.
Compare the result with the set value of the zero-sequence trip current. Consider that
the set value 3I0< is in percentage of the base current IBase.
trip value for the dead line detection function
Measuring the
1.
Apply three-phase voltages with their rated value and zero currents.
2.
Decrease the measured voltage in one phase until the DLD1PH signal appears.
3.
This is the point at which the dead line condition is detected. Check the value of the
decreased voltage with the set value VDLDPU (VDLDPU is in percentage of the
base voltage VBase).
4.
Apply three-phase currents with their rated value and zero voltages.
5.
Decrease the measured current in one phase until the DLD1PH signal appears.
6.
This is the point at which the dead line condition is detected. Check the value of the
decreased current with the set value IDLDPU (IDLDPU is in percentage of the base
current IBase).
Checking the operation of the dv/dt and di/dt based function
Check the operation of the dv/dt and di/dt based function if included in the IED.
C
C
1MRK 511 366-UUS -
are the measured phase voltages
are the measured phase currents
Commissioning manual
(Equation 100)
(Equation 102)
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