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1MRK 505 378-UEN Rev. K
11.5.8.14
Test of FollowStart behaviour
1.
Set StartMode = FollowStart.
2.
Set FunctionMode = Current.
3.
Set RetripMode = UseFunctionMode.
4.
Use default value for tStartTimeout = 1.0 s.
5.
Use for example the default value for time delay backup trip t2 = 0.150 s.
6.
Use for example the default value for time delay retrip t1 = 0.000 s.
7.
Leave the inputs for CB close inactivated. These signals should not influence.
8.
Apply START signal, and after 0.200 s apply the current above the set IPh> value.
9.
Check that STALARM does not come and that both re-trip TRRET and backup trip TRBU
comes instantly at 0.200 s (that is, as soon as current is given to the function).
11.5.8.15
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.
11.5.9
Stub protection STBPTOC
Prepare the IED for verification of settings outlined in Section
Logical signals for STBPTOC protection are available on the local HMI underMain menu /
Settings/IED Settings /Current protection/Stub(PTOC,50STB) /STBPTOC:x
11.5.9.1
Function revision history
Document
revision
A
B
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D
E
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J
11.5.9.2
Measuring the operate limit of set values
1.
Check that the input logical signals BLOCK and RELEASE and the output logical signal TRIP
are all logical zero.
2.
Activate the input RELEASE on the STBPTOC function block
3.
For a short while inject a current (fault current) in one phase to about 110% of the set operating
current, and switch the current off.
Observe to not exceed the maximum permitted overloading of the current circuits in the IED.
4.
Switch the fault current on and measure the operating time of STBPTOC.
Use the TRIP signal from the configured binary output to stop the timer. The operation should
be instantaneously.
5.
Activate the input BLOCK on the STBPTOC function block.
Line differential protection RED670
Commissioning manual
Product
History
revision
2.2.1
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2.2.1
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2.2.2
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2.2.3
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2.2.3
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2.2.4
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2.2.4
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2.2.4
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2.2.5
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© 2017 - 2022 Hitachi Energy. All rights reserved
Testing functionality by secondary injection
GUID-E3FFFAD0-C9E9-4EAF-8418-314E9D475EDA v1
"Preparing the IED to verify
GUID-D32C2C38-452F-45B0-85C1-6C9542089357 v1
Section 11
M12104-72 v5
M14922-2 v8
settings".
M14922-6 v8
169
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