12.5.10
Directional underpower protection GUPPDUP
Prepare the IED for verification of settings outlined in section
section
12.5.10.1
Verifying the settings
The underpower protection shall be set to values according to the real set values to be
used.
The test is made by means of injection of voltage and current where the amplitude of
both current and voltage and the phase angle between the voltage and current can be
controlled. During the test, the analog outputs of active and reactive power shall be
monitored.
1.
Connect the test set for injection of voltage and current corresponding to the
mode to be used in the application. If a three-phase test set is available this could
be used for all the modes. If a single-phase current/voltage test set is available the
test set should be connected to a selected input for one-phase current and voltage.
Table 16:
Calculation modes
Set value:
Mode
Formula used for complex power calculation
L1, L2, L3
*
*
*
1
1
2
2
3
3
L
L
L
L
L
L
S
U
I
U
I
U
I
=
×
+
×
+
×
EQUATION1697 V1 EN
(Equation 80)
Arone
*
*
1 2
1
2 3
3
L L
L
L L
L
S
U
I
U
I
=
×
-
×
EQUATION1698 V1 EN
(Equation 81)
PosSeq
*
3
PosSeq
PosSeq
S
U
I
= ×
×
EQUATION1699 V1 EN
(Equation 82)
L1L2
*
*
1 2
1
2
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1700 V1 EN
(Equation 83)
L2L3
*
*
2 3
2
3
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1701 V1 EN
(Equation 84)
L3L1
*
*
3 1
3
1
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1702 V1 EN
(Equation 85)
Table continues on next page
Section 12
1MRK502053-UEN B
Testing functionality by secondary injection
166
Generator protection REG670 2.0 IEC
Commissioning manual
Summary of Contents for REG670 2.0 IEC
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