Hitachi Relion 670 Series Commissioning Manual page 172

Section 11
Testing functionality by secondary injection
11.5.8.15 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.5.9 Stub protection STBPTOC (50STB)
Prepare the IED for verification of settings outlined in Section
Logical signals for STBPTOC (50STB) 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
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11.5.9.2 Measuring the trip limit of set values
1. Check that the input logical signals BLOCK and ENABLE and the output logical signal TRIP are all
logical zero.
2. Activate the input ENABLE on the STBPTOC (50STB) 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 (50STB).
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 (50STB) 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.
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Product History
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1MRK506371-UUS Rev. M
"Preparing the IED to verify
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Commissioning manual
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