Completing The Test; Stub Protection Stbptoc; Measuring The Operate Limit Of Set Values - ABB rec670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.4.9.9
10.4.10
10.4.10.1
104
6. Apply the fault and the start again. The value of current should be below the set
value I>BlkCont.
7. Arrange disconnection of BC closed signal(s) well before set back-up trip time
t2. It simulates a correct CB tripping.
8. Verify that back-up trip is not achieved. Re-trip can appear for example, due to
selection "Re-trip without current check".

Completing the test

Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.

Stub protection STBPTOC

Prepare the IED for verification of settings outlined in section
verify settings".
Logical signals for STBPTOC protection are available on the local HMI underMain
menu/Settings/Setting group N/Current protection/Stub(PTOC,50STB)/
STBPTOC:x

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.
1MRK 511 360-UEN A
"Preparing the IED to
Bay control REC670 2.1 IEC
Commissioning manual