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1MRK 505 378-UEN Rev. K
Connect the injection current to terminals L1 and neutral.
2.
Set the injected polarizing voltage slightly larger than the set minimum polarizing voltage (5% of
Ur) and set the injection current to lag the voltage by an angle equal to the set reference
characteristic angle (AngleRCA), if the forward directional function is selected.
If reverse directional function is selected, set the injection current to lag the polarizing voltage
by an angle equal to RCA+ 180°.
3.
Increase the injected current and note the value at which the studied step of the function
operates.
4.
Decrease the current slowly and note the reset value.
5.
If the test has been performed by injection of current in phase L1, repeat the test, injecting
current into terminals L2 and L3 with a polarizing voltage connected to terminals L2,
respectively L3.
6.
Block lower set steps when testing higher set steps according to the instructions that follow.
7.
Connect a trip output contact to a timer.
8.
Set the injected current to 200% of the operate level of the tested step, switch on the current
and check the time delay.
For inverse time curves, check the operate time at a current equal to 110% of the operate
current for txMin.
9.
Check that all operate and start contacts operate according to the configuration (signal
matrixes).
10.
Reverse the direction of the injected current and check that the step does not operate.
11.
Check that the protection does not operate when the polarizing voltage is zero.
12.
Repeat the above described tests for the higher set steps.
13.
Finally, check that start and trip information is stored in the event menu.
11.5.4.3
Four step non-directional earth fault protection
1.
Do as described in
11.5.4.4
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.5.5
Four step negative sequence overcurrent protection NS4PTOC
Prepare the IED for verification of settings as outlined in section
11.5.5.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
Line differential protection RED670
Commissioning manual
Section
11.5.4.2, but without applying any polarizing voltage.
Product
History
revision
2.2.1
-
2.2.1
-
2.2.2
-
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
Maximum value changed to 2000.0 % of IBase for IMin1, IMin2, IMin3 and IMin4
settings.
2.2.5
-
© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
GUID-EB1A8DFD-5BAC-4024-ADA2-D9BE7A2B50A0 v2
"Preparing for test"
in this chapter.
GUID-FEAFB742-D0DA-4F9E-B4AC-84E568301282 v2
Section 11
SEMOD53296-202 v5
SEMOD53296-122 v5
157
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