ABB RED670 - Testing the Weak-End Infeed Logic

4. Abruptly reverse the current to AngleRCA setting lagging the voltage, to
operate the forward directional element.
5. Check that the IR
VL 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
M13936-25 v2
If setting
WEI = Echo
M13936-27 v8
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.
No ECHO and CS should appear.
4. Abruptly reverse the current to the setting of AngleRCA setup lagging the
voltage, to operate the forward directional element.
No ECHO and CS should appear.
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 of
f the CRL binary input.
7. Activate the BLOCK binary input.
8. Activate the CRL binary input.
No ECHO and CS should appear.
9. Switch off the polarizing voltage and reset the BLOCK and CRL binary
input.
If setting
WEI = Echo & Trip
M13936-52 v12
1. Inject the polarizing voltage 3U0 to about 90% of the setting (3U0>)
operating voltage.
2. Activate the CRL binary input.
Section 11 1MRK 505 378-UEN A
Testing functionality by secondary injection
246 Line differential protection RED670 2.2 IEC
Commissioning manual