Testing The Current Reversal Logic; Testing The Weak-End Infeed Logic - Hitachi Relion 670 Series Commissioning Manual

1MRK 511 403-UEN Rev. L
First, test the four step residual overcurrent protection function EF4PTOC and then the current
reversal and weak-end infeed logic according to the corresponding instructions. Then continue with
the instructions below.
11.11.5.1

Testing the current reversal logic

1. Inject the polarizing voltage 3U0 to 5% of UBase 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 (IN>Dir).
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.
11.11.5.2

Testing the weak-end infeed logic

If setting WEI = Echo
1. Inject the polarizing voltage 3U0 to (180° — AngleRCA) of UBase 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
(IN>Dir).
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 3U0 to about 90% of the setting ( 3U0> ) operating voltage.
2. Activate the CRL binary input.
Bay control REC670
Commissioning manual
No ECHO and CS should appear.
No ECHO and CS should appear.
No ECHO and CS should appear.
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Section 11
Testing functionality by secondary injection
M13936-9 v7
M13936-25 v2
M13936-27 v8
M13936-52 v12
185