Logical signals for STBPTOC protection are available on the local HMI under
Main
menu/Settings/Setting group N/Current protection/Stub(PTOC,50STB)/
STBPTOC:x
10.5.9.1
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.
10.5.9.2
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.
10.5.10
Pole discordance protection CCPDSC
Prepare the IED for verification of settings outlined in section
10.5.10.1
Verifying the settings
Section 10
1MRK 506 355-UEN A
Testing functionality by secondary injection
162
Line distance protection REL670 2.1 IEC
Commissioning manual
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