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1MRK 506 355-UEN A
10.5.2.2
10.5.3
10.5.3.1
10.5.3.2
Line distance protection REL670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
For inverse time curves, check the operate time at a current equal to 110% of the
operate current for txMin.
8.
Check that all operate and start contacts operate according to the configuration
(signal matrixes).
9.
Reverse the direction of the injected current and check that the protection does
not operate.
10. If 2 out of 3 or 3 out of 3 currents for operation is chosen: Check that the function
will not operate with current in one phase only.
11. Repeat the above described tests for the higher set stages.
12. Check that start and trip information is stored in the event menu.
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.
Instantaneous residual overcurrent protection EFPIOC
Prepare the IED for verification of settings outlined in section
verify
settings".
To verify the settings the following fault type should be tested:
•
Phase-to-earth fault
Ensure that the maximum continuous current, supplied from the current source used
for the test of the IED, does not exceed four times the rated current value of the IED.
Measuring the operate limit of set values
1.
Inject a phase current into the IED with an initial value below that of the setting.
2.
Increase the injected current in the Ln or in the neutral (summated current input)
phase until the TRIP signal appears.
3.
Switch the fault current off.
Observe to not exceed the maximum permitted overloading of the current
circuits in the IED.
4.
Compare the measured operating current with the set value.
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.
Section 10
"Preparing the IED to
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