Completing The Test; Broken Conductor Check Brcptoc; Measuring The Operate And Time Limit Of Set Values - ABB RET670 Installation And Commissioning Manual

1MRK 504 088-UEN C
13.6.10.2
13.6.11
13.6.11.1
13.6.11.2
Installation and commissioning manual

Completing the test

Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.

Broken conductor check BRCPTOC

Prepare the IED for verification of settings as outlined in section
section "Preparing for test"

Measuring the operate and time limit of set values

Procedure
1. Check that the input logical signal BLOCK to the BRCPTOC function block
is logical zero and note on the local HMI that the output signal TRIP from the
BRCPTOC function block is equal to the logical 0.
2. Set the measured current (fault current) in one phase to about 110% of the set
operating current IP>.
Observe to not exceed the maximum permitted overloading of the current
circuits in the terminal.
3. Switch on the fault current and measure the operating time of BRCPTOC.
Use the TRIP signal from the configured binary output to stop the timer.
4. Compare the measured time with the set value tOper.
5. Activate the BLOCK binary input.
6. Switch on the fault current (110% of the setting) and wait longer than the set
value tOper.
No TRIP signal should appear.
7. Switch off the fault current.
8. Set the measured current (fault current) in same phase to about 90% of the set
operating current IP>. Switch off the current.
9. Switch on the fault current and wait longer than the set value tOper.
No TRIP signal should appear.
10. Switch off the fault current.
Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
Verifying settings by secondary injection
in this chapter.
Section 13
"Overview" and
155