Stub Protection Stbptoc; Function Revision History; Measuring The Operate Limit Of Set Values; Completing The Test - Hitachi Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.4.10

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
11.4.10.1

Function revision history

Document
revision
A
B
C
D
E
F
G
H
J
K
11.4.10.2

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.
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

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.
104
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 -
2.2.4 -
2.2.5 -
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1MRK 511 403-UEN Rev. L
"Preparing the IED to verify
GUID-D32C2C38-452F-45B0-85C1-6C9542089357 v1
Bay control REC670
Commissioning manual
M14922-2 v8
settings".
M14922-6 v8
M14922-50 v4