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1MRK 505 372-UEN Rev. K
3.2. Increase the injected current, note the operate value of the tested step of the function
3.3. Decrease the current slowly, note the reset value and compare it to the reset ratio 95%.
4.
If the test has been performed by injection of current in phase L1, repeat the test, injecting
current into phases L2 and L3 with polarizing voltage connected to phases L2, respectively L3
(1 out of 3 currents for operation).
5.
If the test has been performed by injection of current in phases L1 – L2, repeat the test,
injecting current into phases L2 – L3 and L3 – L1 with the appropriate phase angle of injected
currents.
6.
Connect a trip output contact to a timer.
7.
Set the injected current to 200% of the operate level of the tested stage, 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.
8.
Check that all operate and start contacts operate according to the configuration (signal
matrixes).
9.
Reverse the direction of the injected current and check that the protection does not operate.
10.
If 2 out of 3 or 3 out of 3 currents are chosen for operation: Check that the function will not
operate with current in one phase only.
11.
Repeat the above described tests for the higher set stages.
12.
Check that start and trip information is stored in the event menu .
10.4.1.3
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.
10.4.2
Four step single phase overcurrent protection PH4SPTOC
Prepare the IED for verification of settings outlined in section
for test"
Directional phase overcurrent current function
10.4.2.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
J
10.4.2.2
Verifying the settings
Procedure
Busbar protection REB670
Commissioning manual
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°).
and compare it to the set value.
in this chapter.
Product
History
revision
2.2.1
-
2.2.1
-
2.2.2
-
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
-
2.2.4
-
2.2.5
The harmonic restraint function changed to freeze the definite and IDMT timers.
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Testing functionality by secondary injection
"Requirements"
and section
GUID-94DB6C52-230F-4313-B6EE-1D8A1640C292 v1
Section 10
SEMOD56287-118 v4
SEMOD128616-54 v2
"Preparing
SEMOD128616-59 v3
79
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