ABB RET670 Installation And Commissioning Manual page 202

Section 13
Verifying settings by secondary injection
196
1. Inject the polarizing voltage 3U0 to 5% of UBase and the phase angle
between voltage and current to 155°, the current leading the voltage.
2. Inject current (155° leading the voltage) 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 65° 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 or on the local HMI, about 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.
No ECHO and CS should appear.
9. Switch off the polarizing voltage and reset the BLOCK and CRL binary input.
WEI = Echo & Trip
If setting
Procedure
1. Inject the polarizing voltage 3U0 to about 90% of the setting (3U0) operating
voltage.
2. Activate the CRL binary input.
No ECHO, CS and TRWEI outputs should appear.
3. Increase the injected voltage to about 110% of the setting (3U0) operating
voltage.
4. Activate the CRL binary input.
5. Check that the ECHO, CS and TRWEI appear on the corresponding binary
output or on the local HMI.
6. Reset the CRL binary input.
7. Activate the BLOCK binary input.
8. Activate the CRL binary input.
1MRK 504 088-UEN C
Installation and commissioning manual