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1MRK 511 409-UUS Rev. K
11.4.1.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
11.4.1.2
Verifying the settings
1.
Connect the test set for current injection to the appropriate IED phases.
If there is any configuration logic that is used to enable or block any of the four available
overcurrent steps, make sure that the step under test is enabled (for example, end fault protection).
If 1 out of 3 currents are chosen for operation: Connect the injection current to phases A and
neutral.
If 2 out of 3 currents are chosen for operation: Connect the injection current into phase A and out
from phase B.
If 3 out of 3 currents are chosen for operation: Connect the symmetrical three-phase injection
current into phases A, B and C.
2.
Connect the test set for the appropriate three-phase voltage injection to the IED phases A, B and
C. The protection shall be fed with a symmetrical three-phase voltage.
3.
Block higher set stages when testing lower set stages by following the procedure described below:
3.1. Set the injected polarizing voltage larger than the set minimum polarizing voltage (default is
3.2. Increase the injected current, note the trip value of the tested step of the function and
3.3. Decrease the current slowly, note the reset value and compare it to the reset ratio 95%.
Phasor measurement unit RES670
Commissioning manual
Product
History
revision
2.2.1
-
2.2.1
-
2.2.2
-
2.2.3
-
2.2.3
-
2.2.4
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2.2.4
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2.2.4
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2.2.5
•
The harmonic restraint function changed to freeze the definite and IDMT timers.
•
The maximum value of the settings IMin1, IMin2, IMin3 and IMin4 has been decreased
to 1000.0 % of IBase.
The verification of the non-directional phase overcurrent function is done as instructed
below, but without applying any polarizing voltage.
5% of VBase) and set the injection current to lag the appropriate voltage by an angle of about
80° if forward directional function is selected.
If 1 out of 3 currents are chosen for operation: The voltage angle of phase A is the reference.
If 2 out of 3 currents are chosen for operation: The phase angle of the phase-to-phase
voltage AB is the reference for APhase.
If 3 out of 3 currents are chosen for operation: The voltage angle of phase A is the reference.
If reverse directional function is selected, set the injection current to lag the polarizing voltage
by an angle equal to 260° (equal to 80° + 180°).
compare it to the set value.
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Section 11
Testing functionality by secondary injection
GUID-154CAE8E-8FD4-460C-852D-6E5C93545F0D v1
SEMOD56287-72 v10
107
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