11.4.10
Stub protection STBPTOC
M14922-2 v8
Prepare the IED for verification of settings outlined in Section
"Preparing the IED to verify settings"
Logical signals for STBPTOC protection are available on the local HMI under
Main menu /
Settings/IED Settings /Current protection/Stub(PTOC,50STB) /STBPTOC:x
11.4.10.1
Function revision history
GUID-D32C2C38-452F-45B0-85C1-6C9542089357 v1
Document
revision
Product
revision
History
A
2.2.1
-
B
2.2.1
-
C
2.2.2
-
D
2.2.3
-
E
2.2.3
-
F
2.2.4
-
G
2.2.4
-
H
2.2.4
-
J
2.2.4
-
K
2.2.5
-
11.4.10.2
Measuring the operate limit of set values
M14922-6 v8
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.
6.
Switch on the fault current (110% of the setting).
No TRIP signal should appear.
7.
Switch off the fault current.
8.
For a short while inject a current (fault current) in same phase to about 90% of the set
operating current, and switch the current off.
9.
Switch the fault current on.
No TRIP signal should appear.
10.
Switch off the fault current.
11.
Reset the RELEASE binary input.
12.
Switch the fault current on.
No TRIP signal should appear.
13.
Switch the fault current off.
11.4.10.3
Completing the test
M14922-50 v4
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.
Section 11
1MRK 511 403-UEN Rev. L
Testing functionality by secondary injection
104
Bay control REC670
Commissioning manual
© 2017 - 2022 Hitachi Energy. All rights reserved
Содержание REC670
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