Hitachi Relion 670 Series Commissioning Manual page 232

Section 11
Testing functionality by secondary injection
1. Inject the polarizing voltage 3V0 to 5% of VBase and the phase angle between voltage and current
to 155°, the current leads the voltage.
2. Inject current (180° — AngleRCA) in one phase to about 110% of the set operating current of the
four step residual overcurrent protection (INDir).
3. Check that the IRVL output is activated in the disturbance recorder after the set time tPickUpRev.
4. Abruptly reverse the current to AngleRCA setting lagging the voltage, to operate the forward
directional element.
5. Check that the IRVL output still is activated after the reversal with a time delay that complies with
the setting tDelayRev.
6. Switch off the polarizing voltage and the current.
11.11.6.2 Testing the weak-end infeed logic
If setting WEI = Echo
1. Inject the polarizing voltage 3V0 to (180° — AngleRCA) of VBase and the phase angle between
voltage and current to 155°, the current leads the voltage.
2. Inject current (180° — AngleRCA) in one phase to about 110% of the setting operating current
(INDir).
3. Activate the CRL binary input.
4. Abruptly reverse the current to the setting of AngleRCA setup lagging the voltage, to operate the
forward directional element.
5. Switch off the current and check that the ECHO and CS appear on the corresponding binary output
during 200ms after resetting the directional element.
6. Switch off the CRL binary input.
7. Activate the BLOCK binary input.
8. Activate the CRL binary input.
9. Switch off the polarizing voltage and reset the BLOCK and CRL binary input.
If setting WEI = Echo & Trip
1. Inject the polarizing voltage 3V0 to about 90% of the setting ( 3V0PU ) operating voltage.
2. Activate the CRL binary input.
3. Increase the injected voltage to about 110% of the setting ( 3V0PU ) operating voltage.
4. Activate the CRL binary input.
226
No ECHO and CS should appear.
No ECHO and CS should appear.
No ECHO and CS should appear.
No ECHO, CS and TRWEI outputs should appear.
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1MRK506371-UUS Rev. M
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Commissioning manual