Hitachi Relion 670 Series Commissioning Manual page 188

Section 11
Testing functionality by secondary injection
Vpickup
ANSIEQUATION2427 V1 EN-US
4. Decrease the voltage slowly and note the reset value.
5. Set and apply about 20% higher voltage than the measured trip value for one phase.
6. Measure the time delay for the TRST1 signal and compare it with the set value.
7. Check the inverse time delay by injecting a voltage corresponding to 1.2 × Vpickup>.
8. Repeat the test to check the inverse time characteristic at different over-voltage levels.
9. Repeat the above described steps for Step 2 of the function.
11.6.2.2 Extended testing
1. The tests above can be repeated for 2 out of 3 and for 3 out of 3 operation mode.
11.6.2.3 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.
11.6.3 Two step residual overvoltage protection ROV2PTOV (59N)
Prepare the IED for verification of settings outlined in Section
11.6.3.1 Function revision history
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11.6.3.2 Verifying the settings
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VT sec
´ ´
VBase
100 VTprim
Product History
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1MRK506371-UUS Rev. M
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"Preparing the IED to verify
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Line distance protection REL670
Commissioning manual
(Equation 98)
M13806-43 v6
SEMOD54358-3 v7
settings".
SEMOD54358-35 v11